private void verifyTypeOperation(Value val, Value param, boolean isNotEqual) {
if (val.getPath() == null) return;
PCPath path = (PCPath) val.getPath();
Discriminator disc = ((Type) val).getDiscriminator();
if (disc == null
|| !(val.getMetaData().getPCSuperclass() != null
|| val.getMetaData().getPCSubclasses().length > 0))
throw new UserException(
_loc.get(
"invalid-type-argument",
path.last() != null ? path.getPCPathString() : path.getSchemaAlias()));
if (disc.getColumns().length == 0) {
if (disc.getStrategy() instanceof NoneDiscriminatorStrategy) {
// limited support for table per class inheritance hierarchy
if (path.last() != null)
throw new UserException(_loc.get("type-argument-unsupported", path.last().getName()));
if (isNotEqual) {
if (param != null && param instanceof Null)
throw new UserException(
_loc.get("type-in-expression-unsupported", path.getSchemaAlias()));
else
throw new UserException(_loc.get("type-not-equal-unsupported", path.getSchemaAlias()));
}
}
if (param != null && param instanceof CollectionParam)
throw new UserException(_loc.get("collection-param-unsupported"));
}
}
public FetchConfiguration setWriteLockLevel(int level) {
if (_state.ctx == null) return this;
if (level != DEFAULT
&& level != MixedLockLevels.LOCK_NONE
&& level != MixedLockLevels.LOCK_READ
&& level != MixedLockLevels.LOCK_OPTIMISTIC
&& level != MixedLockLevels.LOCK_WRITE
&& level != MixedLockLevels.LOCK_OPTIMISTIC_FORCE_INCREMENT
&& level != MixedLockLevels.LOCK_PESSIMISTIC_READ
&& level != MixedLockLevels.LOCK_PESSIMISTIC_WRITE
&& level != MixedLockLevels.LOCK_PESSIMISTIC_FORCE_INCREMENT)
throw new IllegalArgumentException(
_loc.get("bad-lock-level", Integer.valueOf(level)).getMessage());
lock();
try {
assertActiveTransaction();
if (level == DEFAULT)
_state.writeLockLevel = _state.ctx.getConfiguration().getWriteLockLevelConstant();
else _state.writeLockLevel = level;
} finally {
unlock();
}
return this;
}
public Expression matches(Value v1, Value v2, String single, String multi, String esc) {
if (!(v2 instanceof Const)) throw new UserException(_loc.get("const-only", "matches"));
if (esc == null
&& _type.getMappingRepository().getDBDictionary().requiresSearchStringEscapeForLike
== true) {
esc = _type.getMappingRepository().getDBDictionary().searchStringEscape;
}
return new MatchesExpression((Val) v1, (Const) v2, single, multi, esc);
}
public FetchConfiguration setLockScope(int scope) {
if (scope != DEFAULT
&& scope != LockScopes.LOCKSCOPE_NORMAL
&& scope != LockScopes.LOCKSCOPE_EXTENDED)
throw new IllegalArgumentException(
_loc.get("bad-lock-scope", Integer.valueOf(scope)).getMessage());
if (scope == DEFAULT) _state.lockScope = LOCKSCOPE_NORMAL;
else _state.lockScope = scope;
return this;
}
public FetchConfiguration setQueryTimeout(int timeout) {
if (timeout == DEFAULT && _state.ctx != null)
_state.queryTimeout = _state.ctx.getConfiguration().getQueryTimeout();
else if (timeout != DEFAULT) {
if (timeout < -1) {
throw new IllegalArgumentException(_loc.get("invalid-timeout", timeout).getMessage());
} else {
_state.queryTimeout = timeout;
}
}
return this;
}
public FetchConfiguration addField(String field) {
if (StringUtils.isEmpty(field)) throw new UserException(_loc.get("null-field"));
lock();
try {
if (_state.fields == null) _state.fields = new HashSet<String>();
_state.fields.add(field);
} finally {
unlock();
}
return this;
}
public void initialize() {
Column order = field.getOrderColumn();
_orderInsert = field.getOrderColumnIO().isInsertable(order, false);
_orderUpdate = field.getOrderColumnIO().isUpdatable(order, false);
ValueMapping elem = field.getElementMapping();
Log log = field.getRepository().getLog();
if (field.getMappedBy() == null && elem.getUseClassCriteria() && log.isWarnEnabled()) {
ForeignKey fk = elem.getForeignKey();
if (elem.getColumnIO().isAnyUpdatable(fk, false))
log.warn(_loc.get("class-crit-owner", field));
}
}
public FetchConfiguration setFlushBeforeQueries(int flush) {
if (flush != DEFAULT
&& flush != QueryFlushModes.FLUSH_TRUE
&& flush != QueryFlushModes.FLUSH_FALSE
&& flush != QueryFlushModes.FLUSH_WITH_CONNECTION)
throw new IllegalArgumentException(
_loc.get("bad-flush-before-queries", Integer.valueOf(flush)).getMessage());
if (flush == DEFAULT && _state.ctx != null)
_state.flushQuery = _state.ctx.getConfiguration().getFlushBeforeQueriesConstant();
else if (flush != DEFAULT) _state.flushQuery = flush;
return this;
}
/**
* Class mapping for embedded objects.
*
* @author Abe White
* @nojavadoc
*/
public class EmbeddedClassStrategy extends AbstractClassStrategy {
private static final Localizer _loc = Localizer.forPackage(EmbeddedClassStrategy.class);
public void map(boolean adapt) {
ValueMapping vm = cls.getEmbeddingMapping();
if (vm == null || vm.getType() != cls.getDescribedType())
throw new MetaDataException(_loc.get("not-embed", cls));
ClassMappingInfo info = cls.getMappingInfo();
info.assertNoSchemaComponents(cls, true);
ClassMapping owner = null;
if (vm.getValueMappedByMapping() != null)
owner = vm.getValueMappedByMapping().getDefiningMapping();
else owner = vm.getFieldMapping().getDefiningMapping();
cls.setIdentityType(owner.getIdentityType());
cls.setObjectIdType(owner.getObjectIdType(), owner.isObjectIdTypeShared());
cls.setTable(vm.getFieldMapping().getTable());
cls.setPrimaryKeyColumns(owner.getPrimaryKeyColumns());
cls.setColumnIO(owner.getColumnIO());
}
/** Return the proper synthetic null indicator value for the given instance. */
public Object getNullIndicatorValue(OpenJPAStateManager sm) {
Column[] cols = cls.getEmbeddingMapping().getColumns();
if (cols.length != 1) return null;
if (sm == null && !cols[0].isNotNull()) return null;
if (sm == null) return JavaSQLTypes.getEmptyValue(cols[0].getJavaType());
return JavaSQLTypes.getNonEmptyValue(cols[0].getJavaType());
}
/** Return whether the given null indicator value means the object is null. */
public boolean indicatesNull(Object val) {
Column[] cols = cls.getEmbeddingMapping().getColumns();
if (cols.length != 1) return false;
if (val == null) return true;
if (cols[0].isNotNull() && val.equals(JavaSQLTypes.getEmptyValue(cols[0].getJavaType())))
return true;
if (cols[0].getDefaultString() != null && val.toString().equals(cols[0].getDefaultString()))
return true;
return false;
}
public boolean isPrimaryKeyObjectId(boolean hasAll) {
return cls.getEmbeddingMapping()
.getFieldMapping()
.getDefiningMapping()
.isPrimaryKeyObjectId(hasAll);
}
}
public FetchConfiguration addFetchGroup(String name) {
if (StringUtils.isEmpty(name)) throw new UserException(_loc.get("null-fg"));
lock();
try {
if (_state.fetchGroups == null) _state.fetchGroups = new HashSet<String>();
_state.fetchGroups.add(name);
if (FetchGroup.NAME_ALL.equals(name)) _state.fetchGroupContainsAll = true;
else if (FetchGroup.NAME_DEFAULT.equals(name)) _state.fetchGroupContainsDefault = true;
} finally {
unlock();
}
return this;
}
public void map(boolean adapt) {
ValueMapping vm = cls.getEmbeddingMapping();
if (vm == null || vm.getType() != cls.getDescribedType())
throw new MetaDataException(_loc.get("not-embed", cls));
ClassMappingInfo info = cls.getMappingInfo();
info.assertNoSchemaComponents(cls, true);
ClassMapping owner = null;
if (vm.getValueMappedByMapping() != null)
owner = vm.getValueMappedByMapping().getDefiningMapping();
else owner = vm.getFieldMapping().getDefiningMapping();
cls.setIdentityType(owner.getIdentityType());
cls.setObjectIdType(owner.getObjectIdType(), owner.isObjectIdTypeShared());
cls.setTable(vm.getFieldMapping().getTable());
cls.setPrimaryKeyColumns(owner.getPrimaryKeyColumns());
cls.setColumnIO(owner.getColumnIO());
}
/**
* Sets the hint to the given value. If the key corresponds to a known key, then that value is set
* via the setter method. Otherwise it is put into opaque hints map. <br>
* In either case, the original value is put in the hints map. So essential difference between
* setting a value directly by a setter and via a hint is the memory of this original value. <br>
* The other important difference is setting lock levels. Setting of lock level via setter method
* needs active transaction. But setting via hint does not.
*
* @param key a hint key. If it is one of the statically registered hint key then the setter is
* called.
* @param value to be set. The given value type must match the argument type of the setter, if one
* exists.
* @param original value as specified by the caller. This value is put in the hints map.
* @exception IllegalArgumentException if the given value is not acceptable by the setter method,
* if one exists corresponds the given hint key.
*/
public void setHint(String key, Object value, Object original) {
if (key == null) return;
if (_hintSetters.containsKey(key)) {
Method setter = _hintSetters.get(key);
String methodName = setter.getName();
try {
if ("setReadLockLevel".equals(methodName) && !isActiveTransaction()) {
_state.readLockLevel = (Integer) value;
} else if ("setWriteLockLevel".equals(methodName) && !isActiveTransaction()) {
_state.writeLockLevel = (Integer) value;
} else {
setter.invoke(this, Filters.convertToMatchMethodArgument(value, setter));
}
} catch (Exception e) {
String message =
_loc.get("bad-hint-value", key, toString(value), toString(original)).getMessage();
if (e instanceof IllegalArgumentException) {
throw new IllegalArgumentException(message);
}
throw new IllegalArgumentException(message, e);
}
}
addHint(key, original);
}
public void map(boolean adapt) {
OpenJPAConfiguration conf = field.getRepository().getConfiguration();
boolean isNonDefaultMappingAllowed =
field.getRepository().getMetaDataFactory().getDefaults().isNonDefaultMappingAllowed(conf);
FieldMapping mapped = field.getMappedByMapping();
// JPA 2.0 allows non-default mapping: Uni-/1-M/@JoinColumn ==> foreign key strategy
// Bi-/1-M/@JoinColumn should result in exception
if (!isNonDefaultMappingAllowed || mapped != null) {
field.getValueInfo().assertNoSchemaComponents(field, !adapt);
}
field.getKeyMapping().getValueInfo().assertNoSchemaComponents(field.getKey(), !adapt);
ValueMapping elem = field.getElementMapping();
if (elem.getTypeCode() != JavaTypes.PC
|| elem.isEmbeddedPC()
|| !elem.getTypeMapping().isMapped())
throw new MetaDataException(_loc.get("not-elem-relation", field));
// check for named inverse
FieldMappingInfo finfo = field.getMappingInfo();
ValueMappingInfo vinfo = elem.getValueInfo();
boolean criteria = vinfo.getUseClassCriteria();
if (mapped != null) {
mapped.resolve(mapped.MODE_META | mapped.MODE_MAPPING);
if (!(mapped.getStrategy() instanceof RelationFieldStrategy
|| mapped.getHandler() instanceof UntypedPCValueHandler))
throw new MetaDataException(_loc.get("not-inv-relation", field, mapped));
vinfo.assertNoSchemaComponents(elem, !adapt);
elem.setForeignKey(mapped.getForeignKey(field.getDefiningMapping()));
elem.setColumns(mapped.getDefiningMapping().getPrimaryKeyColumns());
elem.setJoinDirection(ValueMapping.JOIN_EXPECTED_INVERSE);
elem.setUseClassCriteria(criteria);
ForeignKey fk = mapped.getForeignKey();
/**
* Foreign key may be null if declared type of the mapped field is abstract and under
* table-per-class inheritance strategy will have no mapped table.
*/
if (fk != null) {
field.setOrderColumn(finfo.getOrderColumn(field, fk.getTable(), adapt));
field.setOrderColumnIO(finfo.getColumnIO());
}
return;
} else {
if (field.getValueInfo().getColumns().size() > 0
&& field.getAccessType() == FieldMetaData.ONE_TO_MANY) {
_uni1MFK = true;
}
}
// map inverse foreign key in related table
ForeignKey fk = vinfo.getInverseTypeJoin(elem, field.getName(), adapt);
if (_uni1MFK) {
Column[] locals = fk.getColumns();
for (int i = 0; i < locals.length; i++) locals[i].setUni1MFK(true);
}
elem.setForeignKey(fk);
elem.setColumnIO(vinfo.getColumnIO());
elem.setColumns(elem.getTypeMapping().getPrimaryKeyColumns());
elem.setJoinDirection(ValueMapping.JOIN_EXPECTED_INVERSE);
elem.setUseClassCriteria(criteria);
elem.mapConstraints(field.getName(), adapt);
field.setOrderColumn(finfo.getOrderColumn(field, fk.getTable(), adapt));
field.setOrderColumnIO(finfo.getColumnIO());
}
/**
* Maps a relation to a set of other objects using an inverse foreign key in the related object
* table.
*
* @author Abe White
*/
public abstract class RelationToManyInverseKeyFieldStrategy extends StoreCollectionFieldStrategy {
private static final Localizer _loc =
Localizer.forPackage(RelationToManyInverseKeyFieldStrategy.class);
private boolean _orderInsert = false;
private boolean _orderUpdate = false;
private boolean _uni1MFK = false;
protected ClassMapping[] getIndependentElementMappings(boolean traverse) {
return field.getElementMapping().getIndependentTypeMappings();
}
protected ForeignKey getJoinForeignKey(ClassMapping elem) {
return field.getElementMapping().getForeignKey(elem);
}
protected void selectElement(
Select sel,
ClassMapping elem,
JDBCStore store,
JDBCFetchConfiguration fetch,
int eagerMode,
Joins joins) {
sel.select(
elem, field.getElementMapping().getSelectSubclasses(), store, fetch, eagerMode, joins);
}
protected Object loadElement(
OpenJPAStateManager sm,
JDBCStore store,
JDBCFetchConfiguration fetch,
Result res,
Joins joins)
throws SQLException {
ClassMapping elem = res.getBaseMapping();
if (elem == null) elem = field.getElementMapping().getIndependentTypeMappings()[0];
return res.load(elem, store, fetch, joins);
}
protected Joins join(Joins joins, ClassMapping elem) {
ValueMapping vm = field.getElementMapping();
ForeignKey fk = vm.getForeignKey(elem);
ClassMapping owner = field.getDefiningMapping();
while (fk.getPrimaryKeyTable() != owner.getTable()) {
joins = owner.joinSuperclass(joins, false);
owner = owner.getJoinablePCSuperclassMapping();
if (owner == null) throw new InternalException();
}
return joins.joinRelation(field.getName(), fk, elem, vm.getSelectSubclasses(), true, true);
}
protected Joins joinElementRelation(Joins joins, ClassMapping elem) {
return joinRelation(joins, false, false);
}
public void map(boolean adapt) {
OpenJPAConfiguration conf = field.getRepository().getConfiguration();
boolean isNonDefaultMappingAllowed =
field.getRepository().getMetaDataFactory().getDefaults().isNonDefaultMappingAllowed(conf);
FieldMapping mapped = field.getMappedByMapping();
// JPA 2.0 allows non-default mapping: Uni-/1-M/@JoinColumn ==> foreign key strategy
// Bi-/1-M/@JoinColumn should result in exception
if (!isNonDefaultMappingAllowed || mapped != null) {
field.getValueInfo().assertNoSchemaComponents(field, !adapt);
}
field.getKeyMapping().getValueInfo().assertNoSchemaComponents(field.getKey(), !adapt);
ValueMapping elem = field.getElementMapping();
if (elem.getTypeCode() != JavaTypes.PC
|| elem.isEmbeddedPC()
|| !elem.getTypeMapping().isMapped())
throw new MetaDataException(_loc.get("not-elem-relation", field));
// check for named inverse
FieldMappingInfo finfo = field.getMappingInfo();
ValueMappingInfo vinfo = elem.getValueInfo();
boolean criteria = vinfo.getUseClassCriteria();
if (mapped != null) {
mapped.resolve(mapped.MODE_META | mapped.MODE_MAPPING);
if (!(mapped.getStrategy() instanceof RelationFieldStrategy
|| mapped.getHandler() instanceof UntypedPCValueHandler))
throw new MetaDataException(_loc.get("not-inv-relation", field, mapped));
vinfo.assertNoSchemaComponents(elem, !adapt);
elem.setForeignKey(mapped.getForeignKey(field.getDefiningMapping()));
elem.setColumns(mapped.getDefiningMapping().getPrimaryKeyColumns());
elem.setJoinDirection(ValueMapping.JOIN_EXPECTED_INVERSE);
elem.setUseClassCriteria(criteria);
ForeignKey fk = mapped.getForeignKey();
/**
* Foreign key may be null if declared type of the mapped field is abstract and under
* table-per-class inheritance strategy will have no mapped table.
*/
if (fk != null) {
field.setOrderColumn(finfo.getOrderColumn(field, fk.getTable(), adapt));
field.setOrderColumnIO(finfo.getColumnIO());
}
return;
} else {
if (field.getValueInfo().getColumns().size() > 0
&& field.getAccessType() == FieldMetaData.ONE_TO_MANY) {
_uni1MFK = true;
}
}
// map inverse foreign key in related table
ForeignKey fk = vinfo.getInverseTypeJoin(elem, field.getName(), adapt);
if (_uni1MFK) {
Column[] locals = fk.getColumns();
for (int i = 0; i < locals.length; i++) locals[i].setUni1MFK(true);
}
elem.setForeignKey(fk);
elem.setColumnIO(vinfo.getColumnIO());
elem.setColumns(elem.getTypeMapping().getPrimaryKeyColumns());
elem.setJoinDirection(ValueMapping.JOIN_EXPECTED_INVERSE);
elem.setUseClassCriteria(criteria);
elem.mapConstraints(field.getName(), adapt);
field.setOrderColumn(finfo.getOrderColumn(field, fk.getTable(), adapt));
field.setOrderColumnIO(finfo.getColumnIO());
}
public void initialize() {
Column order = field.getOrderColumn();
_orderInsert = field.getOrderColumnIO().isInsertable(order, false);
_orderUpdate = field.getOrderColumnIO().isUpdatable(order, false);
ValueMapping elem = field.getElementMapping();
Log log = field.getRepository().getLog();
if (field.getMappedBy() == null && elem.getUseClassCriteria() && log.isWarnEnabled()) {
ForeignKey fk = elem.getForeignKey();
if (elem.getColumnIO().isAnyUpdatable(fk, false))
log.warn(_loc.get("class-crit-owner", field));
}
}
public void insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm) throws SQLException {
if (field.getMappedBy() == null || _orderInsert || _orderUpdate)
insert(sm, rm, sm.fetchObject(field.getIndex()));
}
private void insert(OpenJPAStateManager sm, RowManager rm, Object vals) throws SQLException {
if (field.getMappedBy() != null && !_orderInsert && !_orderUpdate) return;
Collection coll = toCollection(vals);
if (coll == null || coll.isEmpty()) return;
ClassMapping rel = field.getElementMapping().getTypeMapping();
int idx = 0;
for (Iterator itr = coll.iterator(); itr.hasNext(); idx++)
updateInverse(sm.getContext(), itr.next(), rel, rm, sm, idx);
}
public void update(OpenJPAStateManager sm, JDBCStore store, RowManager rm) throws SQLException {
if (field.getMappedBy() != null && !_orderInsert && !_orderUpdate) return;
Object obj = sm.fetchObject(field.getIndex());
ChangeTracker ct = null;
if (obj instanceof Proxy) {
Proxy proxy = (Proxy) obj;
if (Proxies.isOwner(proxy, sm, field.getIndex())) ct = proxy.getChangeTracker();
}
Column order = field.getOrderColumn();
// if no fine-grained change tracking then just delete and reinsert
// if no fine-grained change tracking or if an item was removed
// from an ordered collection, delete and reinsert
if (ct == null || !ct.isTracking() || (order != null && !ct.getRemoved().isEmpty())) {
delete(sm, store, rm);
insert(sm, rm, obj);
return;
}
// null inverse columns for deletes and update them with our oid for
// inserts
ClassMapping rel = field.getElementMapping().getTypeMapping();
StoreContext ctx = store.getContext();
if (field.getMappedBy() == null) {
Collection rem = ct.getRemoved();
for (Iterator itr = rem.iterator(); itr.hasNext(); )
updateInverse(ctx, itr.next(), rel, rm, null, 0);
}
Collection add = ct.getAdded();
int seq = ct.getNextSequence();
for (Iterator itr = add.iterator(); itr.hasNext(); seq++)
updateInverse(ctx, itr.next(), rel, rm, sm, seq);
if (order != null) ct.setNextSequence(seq);
}
public void delete(OpenJPAStateManager sm, JDBCStore store, RowManager rm) throws SQLException {
if (field.getMappedBy() != null) return;
// if nullable, null any existing inverse columns that refer to this obj
ValueMapping elem = field.getElementMapping();
ColumnIO io = elem.getColumnIO();
ForeignKey fk = elem.getForeignKey();
if (!elem.getUseClassCriteria() && io.isAnyUpdatable(fk, true)) {
assertInversable();
Row row = rm.getAllRows(fk.getTable(), Row.ACTION_UPDATE);
row.setForeignKey(fk, io, null);
row.whereForeignKey(fk, sm);
rm.flushAllRows(row);
return;
}
if (!sm.getLoaded().get(field.getIndex())) return;
// update fk on each field value row
ClassMapping rel = field.getElementMapping().getTypeMapping();
StoreContext ctx = store.getContext();
Collection objs = toCollection(sm.fetchObject(field.getIndex()));
if (objs != null && !objs.isEmpty())
for (Iterator itr = objs.iterator(); itr.hasNext(); )
updateInverse(ctx, itr.next(), rel, rm, sm, 0);
}
/** This method updates the inverse columns of a 1-M related object with the given oid. */
private void updateInverse(
StoreContext ctx,
Object inverse,
ClassMapping rel,
RowManager rm,
OpenJPAStateManager sm,
int idx)
throws SQLException {
OpenJPAStateManager invsm = RelationStrategies.getStateManager(inverse, ctx);
if (invsm == null) return;
ValueMapping elem = field.getElementMapping();
ForeignKey fk = elem.getForeignKey();
ColumnIO io = elem.getColumnIO();
Column order = field.getOrderColumn();
int action;
boolean writeable;
boolean orderWriteable;
if (invsm.isNew() && !invsm.isFlushed()) {
// no need to null inverse columns of new instance
if (sm == null || sm.isDeleted()) return;
writeable = io.isAnyInsertable(fk, false);
orderWriteable = _orderInsert;
action = Row.ACTION_INSERT;
} else if (invsm.isDeleted()) {
// no need to null inverse columns of deleted instance
if (invsm.isFlushed() || sm == null || !sm.isDeleted()) return;
writeable = true;
orderWriteable = false;
action = Row.ACTION_DELETE;
} else {
if (sm != null && sm.isDeleted()) sm = null;
writeable = io.isAnyUpdatable(fk, sm == null);
orderWriteable = field.getOrderColumnIO().isUpdatable(order, sm == null);
action = Row.ACTION_UPDATE;
}
if (!writeable && !orderWriteable) return;
assertInversable();
// if this is an update, this might be the only mod to the row, so
// make sure the where condition is set
Row row = rm.getRow(fk.getTable(), action, invsm, true);
if (action == Row.ACTION_UPDATE) row.wherePrimaryKey(invsm);
// update the inverse pointer with our oid value
if (writeable) row.setForeignKey(fk, io, sm);
if (orderWriteable) row.setInt(order, idx);
}
public Object toDataStoreValue(Object val, JDBCStore store) {
ClassMapping cm = field.getElementMapping().getTypeMapping();
return cm.toDataStoreValue(val, cm.getPrimaryKeyColumns(), store);
}
public Joins join(Joins joins, boolean forceOuter) {
ValueMapping elem = field.getElementMapping();
ClassMapping[] clss = elem.getIndependentTypeMappings();
if (clss.length != 1) throw RelationStrategies.unjoinable(elem);
if (forceOuter)
return joins.outerJoinRelation(
field.getName(),
elem.getForeignKey(clss[0]),
clss[0],
elem.getSelectSubclasses(),
true,
true);
return joins.joinRelation(
field.getName(),
elem.getForeignKey(clss[0]),
clss[0],
elem.getSelectSubclasses(),
true,
true);
}
private void assertInversable() {
ValueMapping elem = field.getElementMapping();
if (elem.getIndependentTypeMappings().length != 1) throw RelationStrategies.uninversable(elem);
}
}
/**
* Allows configuration and optimization of how objects are loaded from the data store.
*
* @since 0.3.0
* @author Abe White
* @author Pinaki Poddar
* @nojavadoc
*/
@SuppressWarnings("serial")
public class FetchConfigurationImpl implements FetchConfiguration, Cloneable {
private static final Localizer _loc = Localizer.forPackage(FetchConfigurationImpl.class);
private static Map<String, Method> _hintSetters = new HashMap<String, Method>();
/**
* Registers hint keys that have a corresponding setter method. The hint keys are registered in
* <code>openjpa.FetchPlan</code> and <code>openjpa</code> as prefix. Also some keys are
* registered in <code>javax.persistence</code> namespace.
*/
static {
String[] prefixes = {"openjpa.FetchPlan", "openjpa"};
Class<?> target = FetchConfiguration.class;
populateHintSetter(target, "ExtendedPathLookup", boolean.class, prefixes);
populateHintSetter(target, "FetchBatchSize", int.class, prefixes);
populateHintSetter(target, "FlushBeforeQueries", int.class, prefixes);
populateHintSetter(target, "LockScope", int.class, prefixes);
populateHintSetter(target, "LockTimeout", int.class, prefixes);
populateHintSetter(target, "setLockTimeout", "timeout", int.class, "javax.persistence.lock");
populateHintSetter(target, "MaxFetchDepth", int.class, prefixes);
populateHintSetter(target, "QueryTimeout", int.class, prefixes);
populateHintSetter(target, "setQueryTimeout", "timeout", int.class, "javax.persistence.query");
populateHintSetter(target, "ReadLockLevel", int.class, prefixes);
populateHintSetter(target, "setReadLockLevel", "ReadLockMode", int.class, prefixes);
populateHintSetter(target, "WriteLockLevel", int.class, prefixes);
populateHintSetter(target, "setWriteLockLevel", "WriteLockMode", int.class, prefixes);
}
/**
* Populate static registry of hints.
*
* @param target The name of the target class that will receive this hint.
* @param hint the simple name of the hint without a prefix.
* @param type the value argument type of the target setter method.
* @param prefixes the prefixes will be added to the simple hint name.
*/
protected static void populateHintSetter(
Class<?> target, String hint, Class<?> type, String... prefixes) {
populateHintSetter(target, "set" + hint, hint, type, prefixes);
}
/**
* Populate static registry of hints.
*
* @param target The name of the target class that will receive this hint.
* @param method The name of the method in the target class that will receive this hint.
* @param hint the simple name of the hint without a prefix.
* @param type the value argument type of the target setter method.
* @param prefixes the prefixes will be added to the simple hint name.
*/
protected static void populateHintSetter(
Class<?> target, String method, String hint, Class<?> type, String... prefixes) {
try {
Method setter = target.getMethod(method, type);
for (String prefix : prefixes) {
_hintSetters.put(prefix + "." + hint, setter);
}
} catch (Exception e) {
// should not reach
throw new InternalException(
"setter for " + hint + " with argument " + type + " does not exist");
}
}
/** Configurable state shared throughout a traversal chain. */
protected static class ConfigurationState implements Serializable {
public transient StoreContext ctx = null;
public int fetchBatchSize = 0;
public int maxFetchDepth = 1;
public boolean queryCache = true;
public int flushQuery = 0;
public int lockTimeout = -1;
public int queryTimeout = -1;
public int lockScope = LOCKSCOPE_NORMAL;
public int readLockLevel = LOCK_NONE;
public int writeLockLevel = LOCK_NONE;
public Set<String> fetchGroups = null;
public Set<String> fields = null;
public Set<Class<?>> rootClasses;
public Set<Object> rootInstances;
public Map<String, Object> hints = null;
public boolean fetchGroupContainsDefault = false;
public boolean fetchGroupContainsAll = false;
public boolean extendedPathLookup = false;
public DataCacheRetrieveMode cacheRetrieveMode = DataCacheRetrieveMode.USE;
public DataCacheStoreMode cacheStoreMode = DataCacheStoreMode.USE;
}
private final ConfigurationState _state;
private FetchConfigurationImpl _parent;
private String _fromField;
private Class<?> _fromType;
private String _directRelationOwner;
private boolean _load = true;
private int _availableRecursion;
private int _availableDepth;
public FetchConfigurationImpl() {
this(null);
}
protected FetchConfigurationImpl(ConfigurationState state) {
_state = (state == null) ? new ConfigurationState() : state;
_availableDepth = _state.maxFetchDepth;
}
public StoreContext getContext() {
return _state.ctx;
}
public void setContext(StoreContext ctx) {
// can't reset non-null context to another context
if (ctx != null && _state.ctx != null && ctx != _state.ctx) throw new InternalException();
_state.ctx = ctx;
if (ctx == null) return;
// initialize to conf info
OpenJPAConfiguration conf = ctx.getConfiguration();
setFetchBatchSize(conf.getFetchBatchSize());
setFlushBeforeQueries(conf.getFlushBeforeQueriesConstant());
setLockTimeout(conf.getLockTimeout());
setQueryTimeout(conf.getQueryTimeout());
clearFetchGroups();
addFetchGroups(Arrays.asList(conf.getFetchGroupsList()));
setMaxFetchDepth(conf.getMaxFetchDepth());
}
/** Clone this instance. */
public Object clone() {
FetchConfigurationImpl clone = newInstance(null);
clone._state.ctx = _state.ctx;
clone._parent = _parent;
clone._fromField = _fromField;
clone._fromType = _fromType;
clone._directRelationOwner = _directRelationOwner;
clone._load = _load;
clone._availableRecursion = _availableRecursion;
clone._availableDepth = _availableDepth;
clone.copy(this);
return clone;
}
/** Return a new hollow instance. */
protected FetchConfigurationImpl newInstance(ConfigurationState state) {
return new FetchConfigurationImpl(state);
}
public void copy(FetchConfiguration fetch) {
setFetchBatchSize(fetch.getFetchBatchSize());
setMaxFetchDepth(fetch.getMaxFetchDepth());
setQueryCacheEnabled(fetch.getQueryCacheEnabled());
setFlushBeforeQueries(fetch.getFlushBeforeQueries());
setExtendedPathLookup(fetch.getExtendedPathLookup());
setLockTimeout(fetch.getLockTimeout());
setQueryTimeout(fetch.getQueryTimeout());
setLockScope(fetch.getLockScope());
clearFetchGroups();
addFetchGroups(fetch.getFetchGroups());
clearFields();
copyHints(fetch);
setCacheRetrieveMode(fetch.getCacheRetrieveMode());
setCacheStoreMode(fetch.getCacheStoreMode());
addFields(fetch.getFields());
// don't use setters because require active transaction
_state.readLockLevel = fetch.getReadLockLevel();
_state.writeLockLevel = fetch.getWriteLockLevel();
}
void copyHints(FetchConfiguration fetch) {
if (fetch instanceof FetchConfigurationImpl == false) return;
FetchConfigurationImpl from = (FetchConfigurationImpl) fetch;
if (from._state == null || from._state.hints == null) return;
if (this._state == null) return;
if (this._state.hints == null) this._state.hints = new HashMap<String, Object>();
this._state.hints.putAll(from._state.hints);
}
public int getFetchBatchSize() {
return _state.fetchBatchSize;
}
public FetchConfiguration setFetchBatchSize(int fetchBatchSize) {
if (fetchBatchSize == DEFAULT && _state.ctx != null)
fetchBatchSize = _state.ctx.getConfiguration().getFetchBatchSize();
if (fetchBatchSize != DEFAULT) _state.fetchBatchSize = fetchBatchSize;
return this;
}
public int getMaxFetchDepth() {
return _state.maxFetchDepth;
}
public FetchConfiguration setMaxFetchDepth(int depth) {
if (depth == DEFAULT && _state.ctx != null)
depth = _state.ctx.getConfiguration().getMaxFetchDepth();
if (depth != DEFAULT) {
_state.maxFetchDepth = depth;
if (_parent == null) _availableDepth = depth;
}
return this;
}
public boolean getQueryCacheEnabled() {
return _state.queryCache;
}
public FetchConfiguration setQueryCacheEnabled(boolean cache) {
_state.queryCache = cache;
return this;
}
public int getFlushBeforeQueries() {
return _state.flushQuery;
}
public boolean getExtendedPathLookup() {
return _state.extendedPathLookup;
}
public FetchConfiguration setExtendedPathLookup(boolean flag) {
_state.extendedPathLookup = flag;
return this;
}
public FetchConfiguration setFlushBeforeQueries(int flush) {
if (flush != DEFAULT
&& flush != QueryFlushModes.FLUSH_TRUE
&& flush != QueryFlushModes.FLUSH_FALSE
&& flush != QueryFlushModes.FLUSH_WITH_CONNECTION)
throw new IllegalArgumentException(
_loc.get("bad-flush-before-queries", Integer.valueOf(flush)).getMessage());
if (flush == DEFAULT && _state.ctx != null)
_state.flushQuery = _state.ctx.getConfiguration().getFlushBeforeQueriesConstant();
else if (flush != DEFAULT) _state.flushQuery = flush;
return this;
}
public Set<String> getFetchGroups() {
if (_state.fetchGroups == null) return Collections.emptySet();
return _state.fetchGroups;
}
public boolean hasFetchGroup(String group) {
return _state.fetchGroups != null
&& (_state.fetchGroups.contains(group) || _state.fetchGroups.contains(FetchGroup.NAME_ALL));
}
public boolean hasFetchGroupDefault() {
// Fetch group All includes fetch group Default by definition
return _state.fetchGroupContainsDefault || _state.fetchGroupContainsAll;
}
public boolean hasFetchGroupAll() {
return _state.fetchGroupContainsAll;
}
public FetchConfiguration addFetchGroup(String name) {
if (StringUtils.isEmpty(name)) throw new UserException(_loc.get("null-fg"));
lock();
try {
if (_state.fetchGroups == null) _state.fetchGroups = new HashSet<String>();
_state.fetchGroups.add(name);
if (FetchGroup.NAME_ALL.equals(name)) _state.fetchGroupContainsAll = true;
else if (FetchGroup.NAME_DEFAULT.equals(name)) _state.fetchGroupContainsDefault = true;
} finally {
unlock();
}
return this;
}
public FetchConfiguration addFetchGroups(Collection<String> groups) {
if (groups == null || groups.isEmpty()) return this;
for (String group : groups) addFetchGroup(group);
return this;
}
public FetchConfiguration removeFetchGroup(String group) {
lock();
try {
if (_state.fetchGroups != null) {
_state.fetchGroups.remove(group);
if (FetchGroup.NAME_ALL.equals(group)) _state.fetchGroupContainsAll = false;
else if (FetchGroup.NAME_DEFAULT.equals(group)) _state.fetchGroupContainsDefault = false;
}
} finally {
unlock();
}
return this;
}
public FetchConfiguration removeFetchGroups(Collection<String> groups) {
lock();
try {
if (_state.fetchGroups != null && groups != null)
for (String group : groups) removeFetchGroup(group);
} finally {
unlock();
}
return this;
}
public FetchConfiguration clearFetchGroups() {
lock();
try {
if (_state.fetchGroups != null) {
_state.fetchGroups.clear();
_state.fetchGroupContainsAll = false;
_state.fetchGroupContainsDefault = true;
}
} finally {
unlock();
}
return this;
}
public FetchConfiguration resetFetchGroups() {
clearFetchGroups();
if (_state.ctx != null)
addFetchGroups(Arrays.asList(_state.ctx.getConfiguration().getFetchGroupsList()));
return this;
}
public Set<String> getFields() {
if (_state.fields == null) return Collections.emptySet();
return _state.fields;
}
public boolean hasField(String field) {
return _state.fields != null && _state.fields.contains(field);
}
public FetchConfiguration addField(String field) {
if (StringUtils.isEmpty(field)) throw new UserException(_loc.get("null-field"));
lock();
try {
if (_state.fields == null) _state.fields = new HashSet<String>();
_state.fields.add(field);
} finally {
unlock();
}
return this;
}
public FetchConfiguration addFields(Collection<String> fields) {
if (fields == null || fields.isEmpty()) return this;
lock();
try {
if (_state.fields == null) _state.fields = new HashSet<String>();
_state.fields.addAll(fields);
} finally {
unlock();
}
return this;
}
public FetchConfiguration removeField(String field) {
lock();
try {
if (_state.fields != null) _state.fields.remove(field);
} finally {
unlock();
}
return this;
}
public FetchConfiguration removeFields(Collection<String> fields) {
lock();
try {
if (_state.fields != null) _state.fields.removeAll(fields);
} finally {
unlock();
}
return this;
}
public FetchConfiguration clearFields() {
lock();
try {
if (_state.fields != null) _state.fields.clear();
} finally {
unlock();
}
return this;
}
public DataCacheRetrieveMode getCacheRetrieveMode() {
return _state.cacheRetrieveMode;
}
public DataCacheStoreMode getCacheStoreMode() {
return _state.cacheStoreMode;
}
public void setCacheRetrieveMode(DataCacheRetrieveMode mode) {
_state.cacheRetrieveMode = mode;
}
public void setCacheStoreMode(DataCacheStoreMode mode) {
_state.cacheStoreMode = mode;
}
public int getLockTimeout() {
return _state.lockTimeout;
}
public FetchConfiguration setLockTimeout(int timeout) {
if (timeout == DEFAULT && _state.ctx != null)
_state.lockTimeout = _state.ctx.getConfiguration().getLockTimeout();
else if (timeout != DEFAULT) {
if (timeout < -1) {
throw new IllegalArgumentException(_loc.get("invalid-timeout", timeout).getMessage());
} else {
_state.lockTimeout = timeout;
}
}
return this;
}
public int getQueryTimeout() {
return _state.queryTimeout;
}
public FetchConfiguration setQueryTimeout(int timeout) {
if (timeout == DEFAULT && _state.ctx != null)
_state.queryTimeout = _state.ctx.getConfiguration().getQueryTimeout();
else if (timeout != DEFAULT) {
if (timeout < -1) {
throw new IllegalArgumentException(_loc.get("invalid-timeout", timeout).getMessage());
} else {
_state.queryTimeout = timeout;
}
}
return this;
}
public int getLockScope() {
return _state.lockScope;
}
public FetchConfiguration setLockScope(int scope) {
if (scope != DEFAULT
&& scope != LockScopes.LOCKSCOPE_NORMAL
&& scope != LockScopes.LOCKSCOPE_EXTENDED)
throw new IllegalArgumentException(
_loc.get("bad-lock-scope", Integer.valueOf(scope)).getMessage());
if (scope == DEFAULT) _state.lockScope = LOCKSCOPE_NORMAL;
else _state.lockScope = scope;
return this;
}
public int getReadLockLevel() {
return _state.readLockLevel;
}
public FetchConfiguration setReadLockLevel(int level) {
if (_state.ctx == null) return this;
if (level != DEFAULT
&& level != MixedLockLevels.LOCK_NONE
&& level != MixedLockLevels.LOCK_READ
&& level != MixedLockLevels.LOCK_OPTIMISTIC
&& level != MixedLockLevels.LOCK_WRITE
&& level != MixedLockLevels.LOCK_OPTIMISTIC_FORCE_INCREMENT
&& level != MixedLockLevels.LOCK_PESSIMISTIC_READ
&& level != MixedLockLevels.LOCK_PESSIMISTIC_WRITE
&& level != MixedLockLevels.LOCK_PESSIMISTIC_FORCE_INCREMENT)
throw new IllegalArgumentException(
_loc.get("bad-lock-level", Integer.valueOf(level)).getMessage());
lock();
try {
if (level != MixedLockLevels.LOCK_NONE) assertActiveTransaction();
if (level == DEFAULT)
_state.readLockLevel = _state.ctx.getConfiguration().getReadLockLevelConstant();
else _state.readLockLevel = level;
} finally {
unlock();
}
return this;
}
public int getWriteLockLevel() {
return _state.writeLockLevel;
}
public FetchConfiguration setWriteLockLevel(int level) {
if (_state.ctx == null) return this;
if (level != DEFAULT
&& level != MixedLockLevels.LOCK_NONE
&& level != MixedLockLevels.LOCK_READ
&& level != MixedLockLevels.LOCK_OPTIMISTIC
&& level != MixedLockLevels.LOCK_WRITE
&& level != MixedLockLevels.LOCK_OPTIMISTIC_FORCE_INCREMENT
&& level != MixedLockLevels.LOCK_PESSIMISTIC_READ
&& level != MixedLockLevels.LOCK_PESSIMISTIC_WRITE
&& level != MixedLockLevels.LOCK_PESSIMISTIC_FORCE_INCREMENT)
throw new IllegalArgumentException(
_loc.get("bad-lock-level", Integer.valueOf(level)).getMessage());
lock();
try {
assertActiveTransaction();
if (level == DEFAULT)
_state.writeLockLevel = _state.ctx.getConfiguration().getWriteLockLevelConstant();
else _state.writeLockLevel = level;
} finally {
unlock();
}
return this;
}
public ResultList<?> newResultList(ResultObjectProvider rop) {
if (rop instanceof ListResultObjectProvider) return new SimpleResultList(rop);
if (_state.fetchBatchSize < 0) return new EagerResultList(rop);
if (rop.supportsRandomAccess()) return new SimpleResultList(rop);
return new WindowResultList(rop);
}
/** Throw an exception if no transaction is active. */
private void assertActiveTransaction() {
if (!isActiveTransaction()) throw new NoTransactionException(_loc.get("not-active"));
}
private boolean isActiveTransaction() {
return (_state.ctx != null && _state.ctx.isActive());
}
/**
* Gets the current hints set on this receiver. The values designate the actual value specified by
* the caller and not the values that may have been actually set on the state variables of this
* receiver.
*/
public Map<String, Object> getHints() {
if (_state.hints == null) return Collections.emptyMap();
return Collections.unmodifiableMap(_state.hints);
}
/** Affirms if the given key is set as a hint. */
public boolean isHintSet(String key) {
return _state.hints != null && _state.hints.containsKey(key);
}
/** Removes the given keys and their hint value. */
public void removeHint(String... keys) {
if (keys == null || _state.hints == null) return;
for (String key : keys) {
_state.hints.remove(key);
}
}
public Collection<String> getSupportedHints() {
return _hintSetters.keySet();
}
/**
* Same as <code>setHint(key, value, value)</code>.
*
* @see #setHint(String, Object, Object)
*/
public void setHint(String key, Object value) {
setHint(key, value, value);
}
/**
* Sets the hint to the given value. If the key corresponds to a known key, then that value is set
* via the setter method. Otherwise it is put into opaque hints map. <br>
* In either case, the original value is put in the hints map. So essential difference between
* setting a value directly by a setter and via a hint is the memory of this original value. <br>
* The other important difference is setting lock levels. Setting of lock level via setter method
* needs active transaction. But setting via hint does not.
*
* @param key a hint key. If it is one of the statically registered hint key then the setter is
* called.
* @param value to be set. The given value type must match the argument type of the setter, if one
* exists.
* @param original value as specified by the caller. This value is put in the hints map.
* @exception IllegalArgumentException if the given value is not acceptable by the setter method,
* if one exists corresponds the given hint key.
*/
public void setHint(String key, Object value, Object original) {
if (key == null) return;
if (_hintSetters.containsKey(key)) {
Method setter = _hintSetters.get(key);
String methodName = setter.getName();
try {
if ("setReadLockLevel".equals(methodName) && !isActiveTransaction()) {
_state.readLockLevel = (Integer) value;
} else if ("setWriteLockLevel".equals(methodName) && !isActiveTransaction()) {
_state.writeLockLevel = (Integer) value;
} else {
setter.invoke(this, Filters.convertToMatchMethodArgument(value, setter));
}
} catch (Exception e) {
String message =
_loc.get("bad-hint-value", key, toString(value), toString(original)).getMessage();
if (e instanceof IllegalArgumentException) {
throw new IllegalArgumentException(message);
}
throw new IllegalArgumentException(message, e);
}
}
addHint(key, original);
}
private void addHint(String name, Object value) {
lock();
try {
if (_state.hints == null) _state.hints = new HashMap<String, Object>();
_state.hints.put(name, value);
} finally {
unlock();
}
}
public Object getHint(String name) {
return (_state.hints == null) ? null : _state.hints.get(name);
}
public Object removeHint(String name) {
return (_state.hints == null) ? null : _state.hints.remove(name);
}
public Set<Class<?>> getRootClasses() {
if (_state.rootClasses == null) return Collections.emptySet();
return _state.rootClasses;
}
public FetchConfiguration setRootClasses(Collection<Class<?>> classes) {
lock();
try {
if (_state.rootClasses != null) _state.rootClasses.clear();
if (classes != null && !classes.isEmpty()) {
if (_state.rootClasses == null) _state.rootClasses = new HashSet<Class<?>>(classes);
else _state.rootClasses.addAll(classes);
}
} finally {
unlock();
}
return this;
}
public Set<Object> getRootInstances() {
if (_state.rootInstances == null) return Collections.emptySet();
return _state.rootInstances;
}
public FetchConfiguration setRootInstances(Collection<?> instances) {
lock();
try {
if (_state.rootInstances != null) _state.rootInstances.clear();
if (instances != null && !instances.isEmpty()) {
if (_state.rootInstances == null) {
_state.rootInstances = new HashSet<Object>(instances);
} else {
_state.rootInstances.addAll(instances);
}
}
} finally {
unlock();
}
return this;
}
public void lock() {
if (_state.ctx != null) _state.ctx.lock();
}
public void unlock() {
if (_state.ctx != null) _state.ctx.unlock();
}
/////////////
// Traversal
/////////////
public int requiresFetch(FieldMetaData fm) {
if (!includes(fm)) return FETCH_NONE;
Class<?> type = fm.getRelationType();
if (type == null) return FETCH_LOAD;
if (_availableDepth == 0) return FETCH_NONE;
// we can skip calculating recursion depth if this is a top-level conf:
// the field is in our fetch groups, so can't possibly not select
if (_parent == null) return FETCH_LOAD;
String fieldName = fm.getFullName(false);
int rdepth = getAvailableRecursionDepth(fm, type, fieldName, false);
if (rdepth != FetchGroup.DEPTH_INFINITE && rdepth <= 0) return FETCH_NONE;
if (StringUtils.equals(_directRelationOwner, fieldName)) return FETCH_REF;
return FETCH_LOAD;
}
public boolean requiresLoad() {
return _load;
}
public FetchConfiguration traverse(FieldMetaData fm) {
Class<?> type = fm.getRelationType();
if (type == null) return this;
FetchConfigurationImpl clone = newInstance(_state);
clone._parent = this;
clone._availableDepth = reduce(_availableDepth);
clone._fromField = fm.getFullName(false);
clone._fromType = type;
clone._availableRecursion = getAvailableRecursionDepth(fm, type, fm.getFullName(false), true);
if (StringUtils.equals(_directRelationOwner, fm.getFullName(false))) clone._load = false;
else clone._load = _load;
FieldMetaData owner = fm.getMappedByMetaData();
if (owner != null && owner.getTypeCode() == JavaTypes.PC)
clone._directRelationOwner = owner.getFullName(false);
return clone;
}
/** Whether our configuration state includes the given field. */
private boolean includes(FieldMetaData fmd) {
if ((hasFetchGroupDefault() && fmd.isInDefaultFetchGroup())
|| hasFetchGroupAll()
|| hasField(fmd.getFullName(false))
|| hasExtendedLookupPath(fmd)) return true;
String[] fgs = fmd.getCustomFetchGroups();
for (int i = 0; i < fgs.length; i++) if (hasFetchGroup(fgs[i])) return true;
return false;
}
private boolean hasExtendedLookupPath(FieldMetaData fmd) {
return getExtendedPathLookup()
&& (hasField(fmd.getRealName())
|| (_fromField != null && hasField(_fromField + "." + fmd.getName())));
}
/**
* Return the available recursion depth via the given field for the given type.
*
* @param traverse whether we're traversing the field
*/
private int getAvailableRecursionDepth(
FieldMetaData fm, Class<?> type, String fromField, boolean traverse) {
// see if there's a previous limit
int avail = Integer.MIN_VALUE;
for (FetchConfigurationImpl f = this; f != null; f = f._parent) {
if (StringUtils.equals(f._fromField, fromField)
&& ImplHelper.isAssignable(f._fromType, type)) {
avail = f._availableRecursion;
if (traverse) avail = reduce(avail);
break;
}
}
if (avail == 0) return 0;
// calculate fetch groups max
ClassMetaData meta = fm.getDefiningMetaData();
int max = Integer.MIN_VALUE;
if (fm.isInDefaultFetchGroup())
max = meta.getFetchGroup(FetchGroup.NAME_DEFAULT).getRecursionDepth(fm);
String[] groups = fm.getCustomFetchGroups();
int cur;
for (int i = 0; max != FetchGroup.DEPTH_INFINITE && i < groups.length; i++) {
// ignore custom groups that are inactive in this configuration
if (!this.hasFetchGroup(groups[i])) continue;
cur = meta.getFetchGroup(groups[i]).getRecursionDepth(fm);
if (cur == FetchGroup.DEPTH_INFINITE || cur > max) max = cur;
}
// reduce max if we're traversing a self-type relation
if (traverse
&& max != Integer.MIN_VALUE
&& ImplHelper.isAssignable(meta.getDescribedType(), type)) max = reduce(max);
// take min/defined of previous avail and fetch group max
if (avail == Integer.MIN_VALUE && max == Integer.MIN_VALUE) {
int def = FetchGroup.RECURSION_DEPTH_DEFAULT;
return (traverse && ImplHelper.isAssignable(meta.getDescribedType(), type)) ? def - 1 : def;
}
if (avail == Integer.MIN_VALUE || avail == FetchGroup.DEPTH_INFINITE) return max;
if (max == Integer.MIN_VALUE || max == FetchGroup.DEPTH_INFINITE) return avail;
return Math.min(max, avail);
}
/** Reduce the given logical depth by 1. */
private static int reduce(int d) {
if (d == 0) return 0;
if (d != FetchGroup.DEPTH_INFINITE) d--;
return d;
}
/////////////////
// Debug methods
/////////////////
FetchConfiguration getParent() {
return _parent;
}
boolean isRoot() {
return _parent == null;
}
FetchConfiguration getRoot() {
return (isRoot()) ? this : _parent.getRoot();
}
int getAvailableFetchDepth() {
return _availableDepth;
}
int getAvailableRecursionDepth() {
return _availableRecursion;
}
String getTraversedFromField() {
return _fromField;
}
Class<?> getTraversedFromType() {
return _fromType;
}
List<FetchConfigurationImpl> getPath() {
if (isRoot()) return Collections.emptyList();
return trackPath(new ArrayList<FetchConfigurationImpl>());
}
List<FetchConfigurationImpl> trackPath(List<FetchConfigurationImpl> path) {
if (_parent != null) _parent.trackPath(path);
path.add(this);
return path;
}
public String toString() {
return "FetchConfiguration@"
+ System.identityHashCode(this)
+ " ("
+ _availableDepth
+ ")"
+ getPathString();
}
private String getPathString() {
List<FetchConfigurationImpl> path = getPath();
if (path.isEmpty()) return "";
StringBuilder buf = new StringBuilder().append(": ");
for (Iterator<FetchConfigurationImpl> itr = path.iterator(); itr.hasNext(); ) {
buf.append(itr.next().getTraversedFromField());
if (itr.hasNext()) buf.append("->");
}
return buf.toString();
}
protected String toString(Object o) {
return o == null ? "null" : o.toString() + "[" + o.getClass().getName() + "]";
}
}
/** Throw an exception if no transaction is active. */
private void assertActiveTransaction() {
if (!isActiveTransaction()) throw new NoTransactionException(_loc.get("not-active"));
}
/**
* Expression factory implementation that can be used to execute queries via SQL.
*
* @author Abe White
* @nojavadoc
*/
public class JDBCExpressionFactory implements ExpressionFactory, Serializable {
private static final Val NULL = new Null();
private static final Localizer _loc = Localizer.forPackage(JDBCExpressionFactory.class);
private final ClassMapping _type;
private final SelectConstructor _cons = new SelectConstructor();
private int _getMapValueAlias = 0;
private boolean _isBooleanLiteralAsNumeric = true;
/** Constructor. Supply the type we're querying against. */
public JDBCExpressionFactory(ClassMapping type) {
_type = type;
}
public void setBooleanLiteralAsNumeric(boolean isBooleanLiteralAsNumeric) {
_isBooleanLiteralAsNumeric = isBooleanLiteralAsNumeric;
}
/** Use to create SQL select. */
public SelectConstructor getSelectConstructor() {
return _cons;
}
public Expression emptyExpression() {
return new EmptyExpression();
}
public Expression asExpression(Value v) {
return equal(v, newLiteral(Boolean.TRUE, Literal.TYPE_BOOLEAN));
}
public Expression equal(Value v1, Value v2) {
// if we're comparing an unaccessed bound variable, like in:
// coll.contains (var) && var == x, then translate into:
// coll.contains (x)
if (v1 instanceof PCPath && ((PCPath) v1).isUnaccessedVariable()) return contains(v1, v2);
if (v2 instanceof PCPath && ((PCPath) v2).isUnaccessedVariable()) return contains(v2, v1);
if (v1 instanceof Type || v2 instanceof Type) {
Value val = v1 instanceof Type ? v1 : v2;
verifyTypeOperation(val, null, false);
return new EqualTypeExpression((Val) v1, (Val) v2);
}
return new EqualExpression((Val) v1, (Val) v2);
}
private void verifyTypeOperation(Value val, Value param, boolean isNotEqual) {
if (val.getPath() == null) return;
PCPath path = (PCPath) val.getPath();
Discriminator disc = ((Type) val).getDiscriminator();
if (disc == null
|| !(val.getMetaData().getPCSuperclass() != null
|| val.getMetaData().getPCSubclasses().length > 0))
throw new UserException(
_loc.get(
"invalid-type-argument",
path.last() != null ? path.getPCPathString() : path.getSchemaAlias()));
if (disc.getColumns().length == 0) {
if (disc.getStrategy() instanceof NoneDiscriminatorStrategy) {
// limited support for table per class inheritance hierarchy
if (path.last() != null)
throw new UserException(_loc.get("type-argument-unsupported", path.last().getName()));
if (isNotEqual) {
if (param != null && param instanceof Null)
throw new UserException(
_loc.get("type-in-expression-unsupported", path.getSchemaAlias()));
else
throw new UserException(_loc.get("type-not-equal-unsupported", path.getSchemaAlias()));
}
}
if (param != null && param instanceof CollectionParam)
throw new UserException(_loc.get("collection-param-unsupported"));
}
}
public Expression notEqual(Value v1, Value v2) {
if (v1 instanceof Type || v2 instanceof Type) {
Value val = v1 instanceof Type ? v1 : v2;
Value param = val == v1 ? (v2 instanceof Null ? v2 : null) : (v1 instanceof Null ? v1 : null);
verifyTypeOperation(val, param, true);
return new NotEqualTypeExpression((Val) v1, (Val) v2);
}
return new NotEqualExpression((Val) v1, (Val) v2);
}
public Expression lessThan(Value v1, Value v2) {
return new CompareExpression((Val) v1, (Val) v2, CompareExpression.LESS);
}
public Expression greaterThan(Value v1, Value v2) {
return new CompareExpression((Val) v1, (Val) v2, CompareExpression.GREATER);
}
public Expression lessThanEqual(Value v1, Value v2) {
return new CompareExpression((Val) v1, (Val) v2, CompareExpression.LESS_EQUAL);
}
public Expression greaterThanEqual(Value v1, Value v2) {
return new CompareExpression((Val) v1, (Val) v2, CompareExpression.GREATER_EQUAL);
}
public Expression isEmpty(Value val) {
return new IsEmptyExpression((Val) val);
}
public Expression isNotEmpty(Value val) {
return new IsNotEmptyExpression((Val) val);
}
public Expression contains(Value map, Value arg) {
if (map instanceof Const) {
if (arg instanceof Type) {
// limited support for table per class inheritance
verifyTypeOperation(arg, map, false);
if (((ClassMapping) arg.getMetaData()).getDiscriminator().getColumns().length == 0)
return new EqualTypeExpression((Val) arg, (Val) map);
}
return new InExpression((Val) arg, (Const) map);
}
if (map instanceof SubQ) return new InSubQExpression((Val) arg, (SubQ) map);
return new ContainsExpression((Val) map, (Val) arg);
}
public Expression containsKey(Value map, Value arg) {
if (map instanceof Const) return new InKeyExpression((Val) arg, (Const) map);
return new ContainsKeyExpression((Val) map, (Val) arg);
}
public Expression containsValue(Value map, Value arg) {
if (map instanceof Const) return new InValueExpression((Val) arg, (Const) map);
return new ContainsExpression((Val) map, (Val) arg);
}
public Expression isInstance(Value val, Class c) {
if (val instanceof Const) return new ConstInstanceofExpression((Const) val, c);
return new InstanceofExpression((PCPath) val, c);
}
public Expression and(Expression exp1, Expression exp2) {
if (exp1 instanceof BindVariableExpression)
return new BindVariableAndExpression((BindVariableExpression) exp1, (Exp) exp2);
if (exp2 instanceof BindVariableExpression)
return new BindVariableAndExpression((BindVariableExpression) exp2, (Exp) exp1);
return new AndExpression((Exp) exp1, (Exp) exp2);
}
public Expression or(Expression exp1, Expression exp2) {
return new OrExpression((Exp) exp1, (Exp) exp2);
}
public Expression not(Expression exp) {
if (!(exp instanceof IsNotEmptyExpression)
&& !(exp instanceof InSubQExpression)
&& HasContainsExpressionVisitor.hasContains(exp))
return new NotContainsExpression((Exp) exp);
return new NotExpression((Exp) exp);
}
public Expression bindVariable(Value var, Value val) {
// handle the strange case of using a constant path to bind a
// variable; in these cases the variable acts like an unbound
// variable that we limit by using an IN clause on the constant
// value collection
if (val instanceof Const) {
PCPath path = new PCPath(_type, (Variable) var);
path.setMetaData(var.getMetaData());
return new InExpression(path, (Const) val);
}
return new BindVariableExpression((Variable) var, (PCPath) val, false);
}
public Expression bindKeyVariable(Value var, Value val) {
// handle the strange case of using a constant path to bind a
// variable; in these cases the variable acts like an unbound
// variable that we limit by using an IN clause on the constant
// value collection
if (val instanceof Const) {
PCPath path = new PCPath(_type, (Variable) var);
path.setMetaData(var.getMetaData());
return new InKeyExpression(path, (Const) val);
}
return new BindVariableExpression((Variable) var, (PCPath) val, true);
}
public Expression bindValueVariable(Value var, Value val) {
return bindVariable(var, val);
}
public Expression startsWith(Value v1, Value v2) {
return new StartsWithExpression((Val) v1, (Val) v2);
}
public Expression endsWith(Value v1, Value v2) {
return new EndsWithExpression((Val) v1, (Val) v2);
}
public Expression notMatches(Value v1, Value v2, String single, String multi, String esc) {
return not(matches(v1, v2, single, multi, esc));
}
public Expression matches(Value v1, Value v2, String single, String multi, String esc) {
if (!(v2 instanceof Const)) throw new UserException(_loc.get("const-only", "matches"));
if (esc == null
&& _type.getMappingRepository().getDBDictionary().requiresSearchStringEscapeForLike
== true) {
esc = _type.getMappingRepository().getDBDictionary().searchStringEscape;
}
return new MatchesExpression((Val) v1, (Const) v2, single, multi, esc);
}
public Subquery newSubquery(ClassMetaData candidate, boolean subs, String alias) {
DBDictionary dict = _type.getMappingRepository().getDBDictionary();
dict.assertSupport(dict.supportsSubselect, "SupportsSubselect");
return new SubQ((ClassMapping) candidate, subs, alias);
}
public Path newPath() {
return new PCPath(_type);
}
public Path newPath(Value val) {
if (val instanceof Const) return new ConstPath((Const) val);
if (val instanceof SubQ) return new PCPath((SubQ) val);
return new PCPath(_type, (Variable) val);
}
public Literal newLiteral(Object val, int ptype) {
return new Lit(val, ptype);
}
public Literal newTypeLiteral(Object val, int ptype) {
return new TypeLit(val, ptype);
}
public Value getThis() {
return new PCPath(_type);
}
public Value getNull() {
return NULL;
}
public <T extends Date> Value getCurrentDate(Class<T> dateType) {
return new CurrentDate(dateType);
}
public <T extends Date> Value getCurrentTime(Class<T> dateType) {
return new CurrentDate(dateType);
}
public <T extends Date> Value getCurrentTimestamp(Class<T> dateType) {
return new CurrentDate(dateType);
}
public Parameter newParameter(Object name, Class type) {
return new Param(name, type);
}
public Parameter newCollectionValuedParameter(Object key, Class type) {
return new CollectionParam(key, type);
}
public Value newExtension(FilterListener listener, Value target, Value arg) {
return new Extension((JDBCFilterListener) listener, (Val) target, (Val) arg, _type);
}
public Value newAggregate(AggregateListener listener, Value arg) {
return new Aggregate((JDBCAggregateListener) listener, (Val) arg, _type);
}
public Arguments newArgumentList(Value v1, Value v2) {
return new Args((Val) v1, (Val) v2);
}
public Arguments newArgumentList(Value... vs) {
if (vs == null) return new Args(null);
Val[] vals = new Val[vs.length];
int i = 0;
for (Value v : vs) {
vals[i++] = (Val) v;
}
return new Args(vals);
}
public Value newUnboundVariable(String name, Class type) {
return new Variable(name, type);
}
public Value newBoundVariable(String name, Class type) {
return newUnboundVariable(name, type);
}
public Value cast(Value val, Class cls) {
val.setImplicitType(cls);
return val;
}
public Value add(Value v1, Value v2) {
return new Math((Val) v1, (Val) v2, Math.ADD);
}
public Value subtract(Value v1, Value v2) {
return new Math((Val) v1, (Val) v2, Math.SUBTRACT);
}
public Value multiply(Value v1, Value v2) {
return new Math((Val) v1, (Val) v2, Math.MULTIPLY);
}
public Value divide(Value v1, Value v2) {
return new Math((Val) v1, (Val) v2, Math.DIVIDE);
}
public Value mod(Value v1, Value v2) {
return new Math((Val) v1, (Val) v2, Math.MOD);
}
public Value abs(Value val) {
return new Abs((Val) val);
}
public Value indexOf(Value v1, Value v2) {
return new IndexOf((Val) v1, (Val) v2);
}
public Value concat(Value v1, Value v2) {
return new Concat((Val) v1, (Val) v2);
}
public Value stringLength(Value str) {
return new StringLength((Val) str);
}
public Value trim(Value str, Value trimChar, Boolean where) {
return new Trim((Val) str, (Val) trimChar, where);
}
public Value sqrt(Value val) {
return new Sqrt((Val) val);
}
public Value substring(Value v1, Value v2) {
return new Substring((Val) v1, (Val) v2);
}
public Value toUpperCase(Value val) {
return new ToUpperCase((Val) val);
}
public Value toLowerCase(Value val) {
return new ToLowerCase((Val) val);
}
public Value avg(Value val) {
return new Avg((Val) val);
}
public Value count(Value val) {
return new Count((Val) val);
}
public Value distinct(Value val) {
return new Distinct((Val) val);
}
public Value max(Value val) {
return new Max((Val) val);
}
public Value min(Value val) {
return new Min((Val) val);
}
public Value sum(Value val) {
return new Sum((Val) val);
}
public Value any(Value val) {
return new Any((Val) val);
}
public Value all(Value val) {
return new All((Val) val);
}
public Value size(Value val) {
return new Size((Val) val);
}
public Value index(Value val) {
((PCPath) val).verifyIndexedField();
return new Index((Val) val);
}
public Value type(Value val) {
return new Type((Val) val);
}
public Value mapEntry(Value key, Value val) {
return new MapEntry((Val) key, (Val) val);
}
public Value mapKey(Value key, Value val) {
return new MapKey((Val) key);
}
public Value getKey(Value val) {
((PCPath) val).getKey();
return val;
}
public Value getObjectId(Value val) {
if (val instanceof Const) return new ConstGetObjectId((Const) val);
return new GetObjectId((PCPath) val);
}
public Value getMapValue(Value map, Value arg) {
return new GetMapValue((Val) map, (Val) arg, "gmv" + _getMapValueAlias++);
}
private Value getLiteralRawString(Value val) {
if (val instanceof Lit) {
Lit lit = (Lit) val;
StringBuilder value = new StringBuilder();
int pType = lit.getParseType();
if (pType == Literal.TYPE_SQ_STRING || pType == Literal.TYPE_STRING)
value.append("'").append(lit.getValue().toString()).append("'");
else if (pType == Literal.TYPE_BOOLEAN) {
Boolean boolVal = (Boolean) lit.getValue();
if (_isBooleanLiteralAsNumeric) value.append(boolVal ? "1" : "0");
else value.append(boolVal ? "true" : "false");
} else if (pType == Literal.TYPE_ENUM) {
lit.setRaw(true);
return val;
} else value.append(lit.getValue().toString());
lit.setValue(new Raw(value.toString()));
return lit;
}
return val;
}
public Value simpleCaseExpression(Value caseOperand, Expression[] exp, Value val1) {
Exp[] exps = new Exp[exp.length];
for (int i = 0; i < exp.length; i++) exps[i] = (Exp) exp[i];
val1 = getLiteralRawString(val1);
return new SimpleCaseExpression((Val) caseOperand, exps, (Val) val1);
}
public Value generalCaseExpression(Expression[] exp, Value val) {
Exp[] exps = new Exp[exp.length];
for (int i = 0; i < exp.length; i++) exps[i] = (Exp) exp[i];
val = getLiteralRawString(val);
return new GeneralCaseExpression(exps, (Val) val);
}
public Expression whenCondition(Expression exp, Value val) {
val = getLiteralRawString(val);
return new WhenCondition((Exp) exp, (Val) val);
}
public Expression whenScalar(Value val1, Value val2) {
val1 = getLiteralRawString(val1);
val2 = getLiteralRawString(val2);
return new WhenScalar((Val) val1, (Val) val2);
}
public Value coalesceExpression(Value[] vals) {
;
Object[] values = new Val[vals.length];
for (int i = 0; i < vals.length; i++) {
values[i] = getLiteralRawString(vals[i]);
}
return new CoalesceExpression((Val[]) values);
}
public Value nullIfExpression(Value val1, Value val2) {
val1 = getLiteralRawString(val1);
val2 = getLiteralRawString(val2);
return new NullIfExpression((Val) val1, (Val) val2);
}
public Value newFunction(String functionName, Class<?> resultType, Value... args) {
return new DatastoreFunction(functionName, resultType, newArgumentList(args));
}
public boolean isVerticalType(Value val) {
if (!(val instanceof Type)) return false;
ClassMapping cm = (ClassMapping) ((Type) val).getMetaData();
String strat = cm.getMappingInfo().getHierarchyStrategy();
if (strat != null && strat.equals(VerticalClassStrategy.ALIAS)) return true;
return false;
}
}