/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
*/
public SQLExpression getExpression(SQLExpression expr, List<SQLExpression> args) {
if (args == null || args.size() == 0 || args.size() > 1) {
throw new NucleusException(Localiser.msg("060016", "containsValue", "MapExpression", 1));
}
MapExpression mapExpr = (MapExpression) expr;
SQLExpression valExpr = args.get(0);
if (valExpr.isParameter()) {
// Value is a parameter so make sure its type is set
AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
if (mmd != null && mmd.getMap() != null) {
Class valCls =
stmt.getQueryGenerator()
.getClassLoaderResolver()
.classForName(mmd.getMap().getValueType());
stmt.getQueryGenerator().bindParameter(valExpr.getParameterName(), valCls);
}
}
if (mapExpr instanceof MapLiteral) {
MapLiteral lit = (MapLiteral) mapExpr;
Map map = (Map) lit.getValue();
if (map == null || map.size() == 0) {
return new BooleanLiteral(stmt, expr.getJavaTypeMapping(), Boolean.FALSE);
}
// TODO If valExpr is a parameter and mapExpr is derived from a parameter ?
MapValueLiteral mapValueLiteral = lit.getValueLiteral();
BooleanExpression bExpr = null;
List<SQLExpression> elementExprs = mapValueLiteral.getValueExpressions();
for (int i = 0; i < elementExprs.size(); i++) {
if (bExpr == null) {
bExpr = (elementExprs.get(i)).eq(valExpr);
} else {
bExpr = bExpr.ior((elementExprs.get(i)).eq(valExpr));
}
}
if (bExpr != null) {
bExpr.encloseInParentheses();
}
return bExpr;
}
if (stmt.getQueryGenerator().getCompilationComponent() == CompilationComponent.FILTER) {
boolean needsSubquery = getNeedsSubquery();
// TODO Check if *this* "containsValue" is negated, not any of them (and remove above check)
if (needsSubquery) {
NucleusLogger.QUERY.debug(
"map.containsValue on " + mapExpr + "(" + valExpr + ") using SUBQUERY");
return containsAsSubquery(mapExpr, valExpr);
}
NucleusLogger.QUERY.debug(
"map.containsValue on " + mapExpr + "(" + valExpr + ") using INNERJOIN");
return containsAsInnerJoin(mapExpr, valExpr);
}
return containsAsSubquery(mapExpr, valExpr);
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
*/
public SQLExpression getExpression(SQLExpression expr, List args) {
if (expr != null) {
throw new NucleusException(LOCALISER.msg("060002", getFunctionName(), expr));
} else if (args == null || args.size() != 1) {
throw new NucleusException(getFunctionName() + " is only supported with a single argument");
}
if (stmt.getQueryGenerator().getCompilationComponent() == CompilationComponent.RESULT
|| stmt.getQueryGenerator().getCompilationComponent() == CompilationComponent.HAVING) {
// FUNC(argExpr)
JavaTypeMapping m = null;
if (args.get(0) instanceof SQLExpression) {
// Use same java type as the argument
SQLExpression argExpr = (SQLExpression) args.get(0);
m = getMappingForClass(argExpr.getJavaTypeMapping().getJavaType());
if (args.get(0) instanceof TemporalExpression) {
return new AggregateTemporalExpression(stmt, m, getFunctionName(), args);
} else {
return new AggregateNumericExpression(stmt, m, getFunctionName(), args);
}
} else {
// What is coming through here?
// Fallback to the type for this aggregate TODO Allow for temporal types
m = getMappingForClass(double.class);
return new AggregateNumericExpression(stmt, m, getFunctionName(), args);
}
} else {
// Handle as Subquery "SELECT AVG(expr) FROM tbl"
SQLExpression argExpr = (SQLExpression) args.get(0);
SQLStatement subStmt =
new SQLStatement(
stmt,
stmt.getRDBMSManager(),
argExpr.getSQLTable().getTable(),
argExpr.getSQLTable().getAlias(),
null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping mapping =
stmt.getRDBMSManager()
.getMappingManager()
.getMappingWithDatastoreMapping(String.class, false, false, clr);
String aggregateString = getFunctionName() + "(" + argExpr.toSQLText() + ")";
SQLExpression aggExpr = exprFactory.newLiteral(subStmt, mapping, aggregateString);
((StringLiteral) aggExpr).generateStatementWithoutQuotes();
subStmt.select(aggExpr, null);
JavaTypeMapping subqMapping = exprFactory.getMappingForType(Integer.class, false);
SQLExpression subqExpr = null;
if (argExpr instanceof TemporalExpression) {
subqExpr = new TemporalSubqueryExpression(stmt, subStmt);
} else {
subqExpr = new NumericSubqueryExpression(stmt, subStmt);
}
subqExpr.setJavaTypeMapping(subqMapping);
return subqExpr;
}
}
/* (non-Javadoc)
* @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
*/
public SQLExpression getExpression(SQLExpression expr, List<SQLExpression> args) {
if (!expr.isParameter() && expr instanceof StringLiteral) {
JavaTypeMapping m = exprFactory.getMappingForType(int.class, false);
String val = (String) ((StringLiteral) expr).getValue();
return new IntegerLiteral(stmt, m, Integer.valueOf(val.length()), null);
} else if (expr instanceof StringExpression || expr instanceof ParameterLiteral) {
ArrayList funcArgs = new ArrayList();
funcArgs.add(expr);
return new NumericExpression(stmt, getMappingForClass(int.class), "CHAR_LENGTH", funcArgs);
} else {
throw new NucleusException(Localiser.msg("060001", "length", expr));
}
}
/**
* Utility that does a discriminator candidate query for the specified candidate and subclasses
* and returns the class name of the instance that has the specified identity (if any).
*
* @param storeMgr RDBMS StoreManager
* @param ec execution context
* @param id The id
* @param cmd Metadata for the root candidate class
* @return Name of the class with this identity (or null if none found)
*/
public static String getClassNameForIdUsingDiscriminator(
RDBMSStoreManager storeMgr, ExecutionContext ec, Object id, AbstractClassMetaData cmd) {
// Check for input error
if (cmd == null || id == null) {
return null;
}
SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
ClassLoaderResolver clr = ec.getClassLoaderResolver();
DatastoreClass primaryTable = storeMgr.getDatastoreClass(cmd.getFullClassName(), clr);
// Form the query to find which one of these classes has the instance with this id
DiscriminatorStatementGenerator stmtGen =
new DiscriminatorStatementGenerator(
storeMgr, clr, clr.classForName(cmd.getFullClassName()), true, null, null);
stmtGen.setOption(SelectStatementGenerator.OPTION_RESTRICT_DISCRIM);
SelectStatement sqlStmt = stmtGen.getStatement();
// Select the discriminator
JavaTypeMapping discrimMapping = primaryTable.getDiscriminatorMapping(true);
SQLTable discrimSqlTbl =
SQLStatementHelper.getSQLTableForMappingOfTable(
sqlStmt, sqlStmt.getPrimaryTable(), discrimMapping);
sqlStmt.select(discrimSqlTbl, discrimMapping, null);
// Restrict to this id
JavaTypeMapping idMapping = primaryTable.getIdMapping();
JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
SQLExpression sqlFldExpr =
exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
SQLExpression sqlFldVal = exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
sqlStmt.whereAnd(sqlFldExpr.eq(sqlFldVal), true);
// Perform the query
try {
ManagedConnection mconn = storeMgr.getConnection(ec);
SQLController sqlControl = storeMgr.getSQLController();
if (ec.getSerializeReadForClass(cmd.getFullClassName())) {
sqlStmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
}
try {
PreparedStatement ps =
SQLStatementHelper.getPreparedStatementForSQLStatement(sqlStmt, ec, mconn, null, null);
String statement = sqlStmt.getSQLText().toSQL();
try {
ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, statement, ps);
try {
if (rs != null) {
while (rs.next()) {
DiscriminatorMetaData dismd = discrimMapping.getTable().getDiscriminatorMetaData();
return RDBMSQueryUtils.getClassNameFromDiscriminatorResultSetRow(
discrimMapping, dismd, rs, ec);
}
}
} finally {
rs.close();
}
} finally {
sqlControl.closeStatement(mconn, ps);
}
} finally {
mconn.release();
}
} catch (SQLException sqe) {
NucleusLogger.DATASTORE.error("Exception thrown on querying of discriminator for id", sqe);
throw new NucleusDataStoreException(sqe.toString(), sqe);
}
return null;
}
/**
* Utility that does a union candidate query for the specified candidate(s) and subclasses and
* returns the class name of the instance that has the specified identity (if any).
*
* @param storeMgr RDBMS StoreManager
* @param ec execution context
* @param id The id
* @param rootCmds Metadata for the classes at the root
* @return Name of the class with this identity (or null if none found)
*/
public static String getClassNameForIdUsingUnion(
RDBMSStoreManager storeMgr,
ExecutionContext ec,
Object id,
List<AbstractClassMetaData> rootCmds) {
// Check for input error
if (rootCmds == null || rootCmds.isEmpty() || id == null) {
return null;
}
SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
ClassLoaderResolver clr = ec.getClassLoaderResolver();
// Form a query UNIONing all possible root candidates (and their subclasses)
Iterator<AbstractClassMetaData> rootCmdIter = rootCmds.iterator();
AbstractClassMetaData sampleCmd =
null; // Metadata for sample class in the tree so we can check if needs locking
SelectStatement sqlStmtMain = null;
while (rootCmdIter.hasNext()) {
AbstractClassMetaData rootCmd = rootCmdIter.next();
DatastoreClass rootTbl = storeMgr.getDatastoreClass(rootCmd.getFullClassName(), clr);
if (rootTbl == null) {
// Class must be using "subclass-table" (no table of its own) so find where it is
AbstractClassMetaData[] subcmds = storeMgr.getClassesManagingTableForClass(rootCmd, clr);
if (subcmds == null || subcmds.length == 0) {
// No table for this class so ignore
} else {
for (int i = 0; i < subcmds.length; i++) {
UnionStatementGenerator stmtGen =
new UnionStatementGenerator(
storeMgr,
clr,
clr.classForName(subcmds[i].getFullClassName()),
true,
null,
null);
stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_NUCLEUS_TYPE);
if (sqlStmtMain == null) {
sampleCmd = subcmds[i];
sqlStmtMain = stmtGen.getStatement();
// WHERE (object id) = ?
JavaTypeMapping idMapping = sqlStmtMain.getPrimaryTable().getTable().getIdMapping();
JavaTypeMapping idParamMapping =
new PersistableIdMapping((PersistableMapping) idMapping);
SQLExpression fieldExpr =
exprFactory.newExpression(sqlStmtMain, sqlStmtMain.getPrimaryTable(), idMapping);
SQLExpression fieldVal =
exprFactory.newLiteralParameter(sqlStmtMain, idParamMapping, id, "ID");
sqlStmtMain.whereAnd(fieldExpr.eq(fieldVal), true);
} else {
SelectStatement sqlStmt = stmtGen.getStatement();
// WHERE (object id) = ?
JavaTypeMapping idMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
JavaTypeMapping idParamMapping =
new PersistableIdMapping((PersistableMapping) idMapping);
SQLExpression fieldExpr =
exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
SQLExpression fieldVal =
exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
sqlStmt.whereAnd(fieldExpr.eq(fieldVal), true);
sqlStmtMain.union(sqlStmt);
}
}
}
} else {
UnionStatementGenerator stmtGen =
new UnionStatementGenerator(
storeMgr, clr, clr.classForName(rootCmd.getFullClassName()), true, null, null);
stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_NUCLEUS_TYPE);
if (sqlStmtMain == null) {
sampleCmd = rootCmd;
sqlStmtMain = stmtGen.getStatement();
// WHERE (object id) = ?
JavaTypeMapping idMapping = sqlStmtMain.getPrimaryTable().getTable().getIdMapping();
JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
SQLExpression fieldExpr =
exprFactory.newExpression(sqlStmtMain, sqlStmtMain.getPrimaryTable(), idMapping);
SQLExpression fieldVal =
exprFactory.newLiteralParameter(sqlStmtMain, idParamMapping, id, "ID");
sqlStmtMain.whereAnd(fieldExpr.eq(fieldVal), true);
} else {
SelectStatement sqlStmt = stmtGen.getStatement();
// WHERE (object id) = ?
JavaTypeMapping idMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
SQLExpression fieldExpr =
exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
SQLExpression fieldVal =
exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
sqlStmt.whereAnd(fieldExpr.eq(fieldVal), true);
sqlStmtMain.union(sqlStmt);
}
}
}
// Perform the query
try {
ManagedConnection mconn = storeMgr.getConnection(ec);
SQLController sqlControl = storeMgr.getSQLController();
if (ec.getSerializeReadForClass(sampleCmd.getFullClassName())) {
sqlStmtMain.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
}
try {
PreparedStatement ps =
SQLStatementHelper.getPreparedStatementForSQLStatement(
sqlStmtMain, ec, mconn, null, null);
String statement = sqlStmtMain.getSQLText().toSQL();
try {
ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, statement, ps);
try {
if (rs != null) {
while (rs.next()) {
try {
return rs.getString(UnionStatementGenerator.NUC_TYPE_COLUMN).trim();
} catch (SQLException sqle) {
}
}
}
} finally {
rs.close();
}
} finally {
sqlControl.closeStatement(mconn, ps);
}
} finally {
mconn.release();
}
} catch (SQLException sqe) {
NucleusLogger.DATASTORE.error("Exception with UNION statement", sqe);
throw new NucleusDataStoreException(sqe.toString());
}
return null;
}
/**
* Method to return an expression for Map.containsValue using a subquery "EXISTS". This is for use
* when there are "!contains" or "OR" operations in the filter. Creates the following SQL,
*
* <ul>
* <li><b>Map using join table</b>
* <pre>
* SELECT 1 FROM JOIN_TBL A0_SUB
* WHERE A0_SUB.JOIN_OWN_ID = A0.ID AND A0_SUB.JOIN_VAL_ID = {valExpr}
* </pre>
* <li><b>Map with key stored in value</b>
* <pre>
* SELECT 1 FROM VAL_TABLE A0_SUB INNER JOIN KEY_TBL B0 ON ...
* WHERE B0.JOIN_OWN_ID = A0.ID AND A0_SUB.ID = {valExpr}
* </pre>
* <li><b>Map of value stored in key</b>
* <pre>
* SELECT 1 FROM VAL_TABLE A0_SUB
* WHERE A0_SUB.OWN_ID = A0.ID AND A0_SUB.ID = {valExpr}
* </pre>
* </ul>
*
* and returns a BooleanSubqueryExpression ("EXISTS (subquery)")
*
* @param mapExpr Map expression
* @param valExpr Expression for the value
* @return Contains expression
*/
protected SQLExpression containsAsSubquery(MapExpression mapExpr, SQLExpression valExpr) {
boolean valIsUnbound = (valExpr instanceof UnboundExpression);
String varName = null;
if (valIsUnbound) {
varName = ((UnboundExpression) valExpr).getVariableName();
NucleusLogger.QUERY.debug(
"map.containsValue binding unbound variable " + varName + " using SUBQUERY");
// TODO What if the variable is declared as a subtype, handle this see
// CollectionContainsMethod
}
RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
MetaDataManager mmgr = storeMgr.getMetaDataManager();
AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr, mmgr);
MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
SQLStatement subStmt = null;
if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
// JoinTable Map
if (valCmd == null) {
// Map<?, Non-PC>
subStmt = new SQLStatement(stmt, storeMgr, joinTbl, null, null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
// Restrict to map owner
JavaTypeMapping ownerMapping = ((JoinTable) joinTbl).getOwnerMapping();
SQLExpression ownerExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
SQLExpression ownerIdExpr =
exprFactory.newExpression(
stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr =
exprFactory.newExpression(
subStmt, subStmt.getPrimaryTable(), joinTbl.getValueMapping());
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(
subStmt, subStmt.getPrimaryTable(), joinTbl.getValueMapping());
subStmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
// Map<?, PC>
DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
subStmt = new SQLStatement(stmt, storeMgr, valTbl, null, null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
// Join to join table
SQLTable joinSqlTbl =
subStmt.innerJoin(
subStmt.getPrimaryTable(),
valTbl.getIdMapping(),
joinTbl,
null,
joinTbl.getValueMapping(),
null,
null);
// Restrict to map owner
JavaTypeMapping ownerMapping = joinTbl.getOwnerMapping();
SQLExpression ownerExpr = exprFactory.newExpression(subStmt, joinSqlTbl, ownerMapping);
SQLExpression ownerIdExpr =
exprFactory.newExpression(
stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
subStmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
// Key stored in value table
DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = valTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
subStmt = new SQLStatement(stmt, storeMgr, valTbl, null, null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
// Restrict to map owner (on value table)
SQLExpression ownerExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
SQLExpression ownerIdExpr =
exprFactory.newExpression(
stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
JavaTypeMapping valMapping = valTbl.getIdMapping();
SQLExpression valIdExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valMapping);
subStmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr, mmgr);
DatastoreClass keyTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = keyTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
AbstractMemberMetaData keyValMmd =
keyCmd.getMetaDataForMember(mmd.getValueMetaData().getMappedBy());
if (valCmd == null) {
subStmt = new SQLStatement(stmt, storeMgr, keyTbl, null, null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
// Restrict to map owner (on key table)
SQLExpression ownerExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
SQLExpression ownerIdExpr =
exprFactory.newExpression(
stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr =
exprFactory.newExpression(
subStmt, subStmt.getPrimaryTable(), keyTbl.getMemberMapping(keyValMmd));
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
JavaTypeMapping valMapping = keyTbl.getMemberMapping(keyValMmd);
SQLExpression valIdExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valMapping);
subStmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
subStmt = new SQLStatement(stmt, storeMgr, valTbl, null, null);
subStmt.setClassLoaderResolver(clr);
JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
// Join to key table
SQLTable keySqlTbl =
subStmt.innerJoin(
subStmt.getPrimaryTable(),
valTbl.getIdMapping(),
keyTbl,
null,
keyTbl.getMemberMapping(keyValMmd),
null,
null);
// Restrict to map owner (on key table)
SQLExpression ownerExpr = exprFactory.newExpression(subStmt, keySqlTbl, ownerMapping);
SQLExpression ownerIdExpr =
exprFactory.newExpression(
stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
subStmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
}
return new BooleanSubqueryExpression(stmt, "EXISTS", subStmt);
}
/**
* Method to return an expression for Map.containsValue using INNER JOIN to the element. This is
* only for use when there are no "!containsValue" and no "OR" operations. Creates SQL by adding
* INNER JOIN to the join table (where it exists), and also to the value table adding an AND
* condition on the value (with value of the valueExpr). Returns a BooleanExpression "TRUE" (since
* the INNER JOIN will guarantee if the value is contained of not).
*
* @param mapExpr Map expression
* @param valExpr Expression for the value
* @return Contains expression
*/
protected SQLExpression containsAsInnerJoin(MapExpression mapExpr, SQLExpression valExpr) {
boolean valIsUnbound = (valExpr instanceof UnboundExpression);
String varName = null;
String valAlias = null;
if (valIsUnbound) {
varName = ((UnboundExpression) valExpr).getVariableName();
NucleusLogger.QUERY.debug(
"map.containsValue("
+ valExpr
+ ") binding unbound variable "
+ varName
+ " using INNER JOIN");
// TODO What if the variable is declared as a subtype, handle this see
// CollectionContainsMethod
} else if (!stmt.getQueryGenerator().hasExplicitJoins()) {
JoinType joinType = stmt.getJoinTypeForTable(valExpr.getSQLTable());
if (joinType == JoinType.CROSS_JOIN) {
// Value is currently joined via CROSS JOIN, so remove it (and use INNER JOIN below)
valAlias = stmt.removeCrossJoin(valExpr.getSQLTable());
valIsUnbound = true;
NucleusLogger.QUERY.debug(
"map.containsValue("
+ valExpr
+ ") was previously bound as CROSS JOIN but changing to INNER JOIN");
}
// TODO If owner is joined via CROSS JOIN and value is already present then remove CROSS JOIN
// and join via INNER JOIN
}
RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
MetaDataManager mmgr = storeMgr.getMetaDataManager();
AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr, mmgr);
if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
// Map formed in join table - add join to join table, then to value table (if present)
MapTable mapTbl = (MapTable) storeMgr.getTable(mmd);
SQLTable joinSqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
mapTbl,
null,
mapTbl.getOwnerMapping(),
null,
null);
if (valCmd != null) {
if (valIsUnbound) {
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
SQLTable valSqlTbl =
stmt.innerJoin(
joinSqlTbl,
mapTbl.getValueMapping(),
valTbl,
valAlias,
valTbl.getIdMapping(),
null,
null);
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valSqlTbl.getTable().getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
// Map formed in value table - add join to value table
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = valTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
SQLTable valSqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
valTbl,
valAlias,
ownerMapping,
null,
null);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
// Map formed in key table - add join to key table then to value table
AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr, mmgr);
DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
AbstractMemberMetaData keyValMmd =
keyCmd.getMetaDataForMember(mmd.getValueMetaData().getMappedBy());
JavaTypeMapping ownerMapping = null;
if (mmd.getMappedBy() != null) {
ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
} else {
ownerMapping = keyTbl.getExternalMapping(mmd, MappingConsumer.MAPPING_TYPE_EXTERNAL_FK);
}
SQLTable keySqlTbl =
stmt.innerJoin(
mapExpr.getSQLTable(),
mapExpr.getSQLTable().getTable().getIdMapping(),
keyTbl,
null,
ownerMapping,
null,
null);
if (valCmd != null) {
DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
SQLTable valSqlTbl =
stmt.innerJoin(
keySqlTbl,
keyTbl.getMemberMapping(keyValMmd),
valTbl,
valAlias,
valTbl.getIdMapping(),
null,
null);
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.getQueryGenerator()
.bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
} else {
if (valIsUnbound) {
// Bind the variable in the QueryGenerator
valExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
stmt.getQueryGenerator()
.bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
} else {
// Add restrict to value
SQLExpression valIdExpr =
exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
stmt.whereAnd(valIdExpr.eq(valExpr), true);
}
}
}
JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
}