protected static Object getObjectUsingNondurableIdForResult(
final Result result,
final AbstractClassMetaData cmd,
final ExecutionContext ec,
boolean ignoreCache,
final int[] fpMembers,
String tableName,
StoreManager storeMgr,
Table table) {
if (cmd.hasDiscriminatorStrategy()) {
// Check the class for this discriminator value
String familyName = HBaseUtils.getFamilyNameForColumn(table.getDiscriminatorColumn());
String columnName = HBaseUtils.getQualifierNameForColumn(table.getDiscriminatorColumn());
Object discValue = new String(result.getValue(familyName.getBytes(), columnName.getBytes()));
if (cmd.getDiscriminatorStrategy() == DiscriminatorStrategy.CLASS_NAME
&& !cmd.getFullClassName().equals(discValue)) {
return null;
} else if (cmd.getDiscriminatorStrategy() == DiscriminatorStrategy.VALUE_MAP
&& !cmd.getDiscriminatorValue().equals(discValue)) {
return null;
}
}
final FieldManager fm = new FetchFieldManager(ec, cmd, result, table);
SCOID id = new SCOID(cmd.getFullClassName());
Object pc =
ec.findObject(
id,
new FieldValues() {
// ObjectProvider calls the fetchFields method
public void fetchFields(ObjectProvider op) {
op.replaceFields(fpMembers, fm);
}
public void fetchNonLoadedFields(ObjectProvider op) {
op.replaceNonLoadedFields(fpMembers, fm);
}
public FetchPlan getFetchPlanForLoading() {
return null;
}
},
null,
ignoreCache,
false);
if (cmd.isVersioned()) {
// Set the version on the object
ObjectProvider op = ec.findObjectProvider(pc);
Object version = null;
VersionMetaData vermd = cmd.getVersionMetaDataForClass();
if (vermd.getFieldName() != null) {
// Set the version from the field value
AbstractMemberMetaData verMmd = cmd.getMetaDataForMember(vermd.getFieldName());
version = op.provideField(verMmd.getAbsoluteFieldNumber());
} else {
// Get the surrogate version from the datastore
version = HBaseUtils.getSurrogateVersionForObject(cmd, result, tableName, storeMgr);
}
op.setVersion(version);
}
if (result.getRow() != null) {
ObjectProvider sm = ec.findObjectProvider(pc);
sm.setAssociatedValue("HBASE_ROW_KEY", result.getRow());
}
return pc;
}
/**
* 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);
}
protected static Object getObjectUsingDatastoreIdForResult(
final Result result,
final AbstractClassMetaData cmd,
final ExecutionContext ec,
boolean ignoreCache,
final int[] fpMembers,
String tableName,
StoreManager storeMgr,
Table table) {
if (cmd.hasDiscriminatorStrategy()) {
// Check the class for this discriminator value
String familyName = HBaseUtils.getFamilyNameForColumn(table.getDiscriminatorColumn());
String columnName = HBaseUtils.getQualifierNameForColumn(table.getDiscriminatorColumn());
Object discValue = new String(result.getValue(familyName.getBytes(), columnName.getBytes()));
if (cmd.getDiscriminatorStrategy() == DiscriminatorStrategy.CLASS_NAME
&& !cmd.getFullClassName().equals(discValue)) {
return null;
} else if (cmd.getDiscriminatorStrategy() == DiscriminatorStrategy.VALUE_MAP
&& !cmd.getDiscriminatorValue().equals(discValue)) {
return null;
}
}
String dsidFamilyName = HBaseUtils.getFamilyNameForColumn(table.getDatastoreIdColumn());
String dsidColumnName = HBaseUtils.getQualifierNameForColumn(table.getDatastoreIdColumn());
Object id = null;
try {
byte[] bytes = result.getValue(dsidFamilyName.getBytes(), dsidColumnName.getBytes());
if (bytes != null) {
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bis);
Object key = ois.readObject();
id =
ec.getNucleusContext().getIdentityManager().getDatastoreId(cmd.getFullClassName(), key);
ois.close();
bis.close();
} else {
throw new NucleusException(
"Retrieved identity for family="
+ dsidFamilyName
+ " column="
+ dsidColumnName
+ " IS NULL");
}
} catch (Exception e) {
throw new NucleusException(e.getMessage(), e);
}
final FieldManager fm = new FetchFieldManager(ec, cmd, result, table);
Object pc =
ec.findObject(
id,
new FieldValues() {
// ObjectProvider calls the fetchFields method
public void fetchFields(ObjectProvider op) {
op.replaceFields(fpMembers, fm);
}
public void fetchNonLoadedFields(ObjectProvider op) {
op.replaceNonLoadedFields(fpMembers, fm);
}
public FetchPlan getFetchPlanForLoading() {
return null;
}
},
null,
ignoreCache,
false);
if (cmd.isVersioned()) {
// Set the version on the object
ObjectProvider op = ec.findObjectProvider(pc);
Object version = null;
VersionMetaData vermd = cmd.getVersionMetaDataForClass();
if (vermd.getFieldName() != null) {
// Set the version from the field value
AbstractMemberMetaData verMmd = cmd.getMetaDataForMember(vermd.getFieldName());
version = op.provideField(verMmd.getAbsoluteFieldNumber());
} else {
// Get the surrogate version from the datastore
version = HBaseUtils.getSurrogateVersionForObject(cmd, result, tableName, storeMgr);
}
op.setVersion(version);
}
if (result.getRow() != null) {
ObjectProvider sm = ec.findObjectProvider(pc);
sm.setAssociatedValue("HBASE_ROW_KEY", result.getRow());
}
return pc;
}
/**
* 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));
}