Examples of oracle.toplink.essentials.internal.expressions.ObjectExpression

Package oracle.toplink.essentials.internal.expressions

Examples of oracle.toplink.essentials.internal.expressions.ObjectExpression

oracle.toplink.essentials.internal.expressions.ObjectExpression
Superclass for any object type expressions.

     * This method is used when computing the nested queries for joined mappings.
     * It recurses computing the nested mapping queries and their join indexes.
     */
    protected void computeNestedQueriesForJoinedExpressions(List joinedExpressions, AbstractSession session, ObjectLevelReadQuery readQuery) {
        for (int index = 0; index < joinedExpressions.size(); index++) {
            ObjectExpression objectExpression = (ObjectExpression)joinedExpressions.get(index);
            
            // Expression may not have been initialized.
            objectExpression.getBuilder().setSession(session.getRootSession(null));
            if (objectExpression.getBuilder().getQueryClass() == null){
                objectExpression.getBuilder().setQueryClass(descriptor.getJavaClass());
            }
            
            // PERF: Cache join attribute names.
            ObjectExpression baseExpression = objectExpression;
            while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
                baseExpression = (ObjectExpression)((QueryKeyExpression)baseExpression).getBaseExpression();
            }
            this.addJoinedAttribute(baseExpression.getName());
            
            // Ignore nested
            if ((objectExpression.getBaseExpression() == objectExpression.getBuilder()) && objectExpression.getMapping().isForeignReferenceMapping()) {
                ForeignReferenceMapping mapping = (ForeignReferenceMapping)objectExpression.getMapping();

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     *
     * @see #computeJoiningMappingIndexes(boolean, AbstractSession)
     */
    protected int computeIndexesForJoinedExpressions(List joinedExpressions, int currentIndex, AbstractSession session) {
        for (int index = 0; index < joinedExpressions.size(); index++) {
            ObjectExpression objectExpression = (ObjectExpression)joinedExpressions.get(index);


            // Ignore nested
            if ((objectExpression.getBaseExpression() == objectExpression.getBuilder()) && objectExpression.getMapping() != null && objectExpression.getMapping().isForeignReferenceMapping()) {
                getJoinedMappingIndexes_().put(objectExpression.getMapping(), new Integer(currentIndex));
            }
            ClassDescriptor descriptor = objectExpression.getMapping().getReferenceDescriptor();
            int nFields;
            if(objectExpression.isQueryKeyExpression() && ((QueryKeyExpression)objectExpression).isUsingOuterJoinForMultitableInheritance()) {
                nFields = descriptor.getAllFields().size();
            } else {
                nFields = descriptor.getFields().size();
            }
            currentIndex = currentIndex + nFields;

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        if ((objectExpression.getMapping() == null) || (!objectExpression.getMapping().isJoiningSupported())) {
            throw QueryException.mappingForExpressionDoesNotSupportJoining(objectExpression);
        }


        // Search if any of the expression traverse a 1-m.
        ObjectExpression baseExpression = objectExpression;
        while (!baseExpression.isExpressionBuilder()) {
            if (((QueryKeyExpression)baseExpression).shouldQueryToManyRelationship()) {
                setIsToManyJoinQuery(true);
            }
            if (((QueryKeyExpression)baseExpression).shouldUseOuterJoin()) {
                setIsOuterJoinedAttributeQuery(true);

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        for (Iterator e = joinedExpressions.iterator(); e.hasNext();) {
            Expression expression = (Expression)e.next();


            // Expression has not yet been validated.
            if (expression.isObjectExpression()) {
                ObjectExpression joinedAttribute = (ObjectExpression)expression;


                // Expression may not have been initialized.
                joinedAttribute.getBuilder().setSession(session.getRootSession(null));
                if (joinedAttribute.getBuilder().getQueryClass() == null){
                    joinedAttribute.getBuilder().setQueryClass(descriptor.getJavaClass());
                }
                
                ClassDescriptor nestedDescriptor = null;// joinedAttribute.getDescriptor();


                // expression may not be valid, no descriptor, validation occurs later.

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Related Classes of oracle.toplink.essentials.internal.expressions.ObjectExpression

oracle.toplink.essentials.internal.queryframework.JoinedAttributeManager

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