NullPointerException in SqlQueryStatement OJB 1.0.3
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Key: OJB-83
URL: http://issues.apache.org/jira/browse/OJB-83
Project: OJB
Type: Bug
Components: PB-API
Versions: 1.0.3, 1.0.4
Environment: Windows, Oracle 9.2
Reporter: Andy Malakov
Hello All,
When org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.TableAlias is used
for abstract class (has extent classes declared, but not mapped to any table
itself) it may initialized with tableName=null. This situation later produces a
problem, because tableName is being used for TableAlias identity
(equals/hashcode):
java.lang.NullPointerException
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement$TableAlias.hashCode(SqlQueryStatement.java:1977)
at java.util.HashMap.hash(HashMap.java:261)
at java.util.HashMap.put(HashMap.java:379)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.splitCriteria(SqlQueryStatement.java:1686)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.<init>(SqlQueryStatement.java:132)
at
org.apache.ojb.broker.accesslayer.sql.SqlSelectStatement.<init>(SqlSelectStatement.java:64)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.getSubQuerySQL(SqlQueryStatement.java:976)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendSubQuery(SqlQueryStatement.java:957)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendParameter(SqlQueryStatement.java:942)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendInCriteria(SqlQueryStatement.java:770)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendCriteria(SqlQueryStatement.java:849)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendSQLClause(SqlQueryStatement.java:922)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.asSQLStatement(SqlQueryStatement.java:671)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendClause(SqlQueryStatement.java:592)
at
org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.appendWhereClause(SqlQueryStatement.java:544)
at
org.apache.ojb.broker.accesslayer.sql.SqlSelectStatement.getStatement(SqlSelectStatement.java:243)
at
org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl.getPreparedSelectStatement(SqlGeneratorDefaultImpl.java:151)
at
org.apache.ojb.broker.accesslayer.JdbcAccessImpl.executeQuery(JdbcAccessImpl.java:305)
at
org.apache.ojb.broker.accesslayer.RsQueryObject.performQuery(RsQueryObject.java:74)
at org.apache.ojb.broker.accesslayer.RsIterator.<init>(RsIterator.java:185)
at
org.apache.ojb.broker.core.RsIteratorFactoryImpl.createRsIterator(RsIteratorFactoryImpl.java:58)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getRsIteratorFromQuery(PersistenceBrokerImpl.java:1918)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getIteratorFromQuery(PersistenceBrokerImpl.java:1493)
at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:112)
at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:251)
at
org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:271)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(PersistenceBrokerImpl.java:1367)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338)
Additional information: Unfortunately problem remains in OJB_1_0_RELEASE.
Please look at SqlQueryStatement [line 128]: m_root =
createTableAlias(m_baseCld, hints=null, path="");
When above line is called for abstract class descriptor (the one that has
extent, but not mapped to a table itself) empty path causes variable
lookForExtents=false, which in turn will result in
TableAlias.tableName=null.
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