Examples of org.datanucleus.store.rdbms.sql.expression.ObjectExpression

Package org.datanucleus.store.rdbms.sql.expression

Examples of org.datanucleus.store.rdbms.sql.expression.ObjectExpression

org.datanucleus.store.rdbms.sql.expression.ObjectExpression
Representation of an Object expression in a Query. Typically represents a persistable object, and so its identity, though could be used to represent any Object.
Let's take an example. We have classes A and B, and A contains a reference to B "b". If we do a JDOQL query for class A of "b == value" then "b" is interpreted first and an ObjectExpression is created to represent that object (of type B).

        {
            // When the expression represents a PC object need to extract out as the identity
            if (expr.getJavaTypeMapping() instanceof PersistableMapping)
            {
                JavaTypeMapping mapping = new PersistableIdMapping((PersistableMapping)expr.getJavaTypeMapping());
                return new ObjectExpression(stmt, expr.getSQLTable(), mapping);
            }
            else if (expr.getJavaTypeMapping() instanceof ReferenceMapping)
            {
                JavaTypeMapping mapping = new ReferenceIdMapping((ReferenceMapping)expr.getJavaTypeMapping());
                return new ObjectExpression(stmt, expr.getSQLTable(), mapping);
            }
            return expr;
        }


        throw new IllegalExpressionOperationException("JDOHelper.getObjectId", expr);

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org.datanucleus.identity.OID

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org.datanucleus.metadata.DiscriminatorMetaData

org.datanucleus.store.mapped.DatastoreClass

org.datanucleus.store.mapped.mapping.DiscriminatorMapping

org.datanucleus.store.mapped.mapping.JavaTypeMapping

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org.datanucleus.store.rdbms.RDBMSStoreManager

org.datanucleus.store.rdbms.sql.method.JDOHelperGetObjectIdMethod

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