Examples of org.eclipse.persistence.expressions.Expression.twist()

Package org.eclipse.persistence.expressions

Class org.eclipse.persistence.expressions.Expression

Examples of org.eclipse.persistence.expressions.Expression.twist()

org.eclipse.persistence.expressions.Expression.twist()
INTERNAL: We are given an expression that comes from a different context than the one in which this was built, e.g. it is the selection criteria of a mapping, or the criteria on which multiple tables are joined in a descriptor. We need to transform it so it refers to the objects we are dealing with, and AND it into the rest of our expression. We want to replace the original base expression with (newBase), and any parameters will be given values based on the context which (this) provides. For example, suppose that the main expression is emp.address.streetName = 'something' and we are trying to twist the selection criteria for the mapping 'address' in Employee. Because that mapping selects addresses, we will use the 'address' node as the base. Values for any parameters will come from the 'emp' node, which was the base of the original expression. Note that the values need not be constants, they can be fields. We do this by taking the tree we're trying to merge and traverse it more or less re-executing it it with the appropriate initial receiver and context. Return the root of the new expression tree. This will probably need to be AND'ed with the root of the old tree.

        } else {
            // Using a join, (WHERE <orginal-query-criteria> AND <mapping-join>)
            // Join the query where clause with the mapping's,
            // this will cause a join that should bring in all of the target objects.
            Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", descriptorToUse);
            batchSelectionCriteria = backRef.twist(getSelectionCriteria(), builder);
            if (query.getSelectionCriteria() != null) {
                // For bug 2612567, any query can have batch attributes, so the
                // original selection criteria can be quite complex, with multiple
                // builders (i.e. for parallel selects).
                // Now uses cloneUsing(newBase) instead of rebuildOn(newBase).

View Full Code Here

        } else {
            // Using a join, (WHERE <orginal-query-criteria> AND <mapping-join>)
            // Join the query where clause with the mapping's,
            // this will cause a join that should bring in all of the target objects.
            Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", descriptorToUse);
            batchSelectionCriteria = backRef.twist(getSelectionCriteria(), builder);
            if (query.getSelectionCriteria() != null) {
                // For bug 2612567, any query can have batch attributes, so the
                // original selection criteria can be quite complex, with multiple
                // builders (i.e. for parallel selects).
                // Now uses cloneUsing(newBase) instead of rebuildOn(newBase).

View Full Code Here

        } else {
            // Using a join, (WHERE <orginal-query-criteria> AND <mapping-join>)
            // Join the query where clause with the mapping's,
            // this will cause a join that should bring in all of the target objects.
            Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", descriptorToUse);
            batchSelectionCriteria = backRef.twist(getSelectionCriteria(), builder);
            if (query.getSelectionCriteria() != null) {
                // For bug 2612567, any query can have batch attributes, so the
                // original selection criteria can be quite complex, with multiple
                // builders (i.e. for parallel selects).
                // Now uses cloneUsing(newBase) instead of rebuildOn(newBase).

View Full Code Here

        } else {
            // Using a join, (WHERE <orginal-query-criteria> AND <mapping-join>)
            // Join the query where clause with the mapping's,
            // this will cause a join that should bring in all of the target objects.
            Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", descriptorToUse);
            batchSelectionCriteria = backRef.twist(getSelectionCriteria(), builder);
            if (query.getSelectionCriteria() != null) {
                // For bug 2612567, any query can have batch attributes, so the
                // original selection criteria can be quite complex, with multiple
                // builders (i.e. for parallel selects).
                // Now uses cloneUsing(newBase) instead of rebuildOn(newBase).

View Full Code Here

        } else {
            // Using a join, (WHERE <orginal-query-criteria> AND <mapping-join>)
            // Join the query where clause with the mapping's,
            // this will cause a join that should bring in all of the target objects.
            Expression backRef = builder.getManualQueryKey(getAttributeName() + "-back-ref", descriptorToUse);
            batchSelectionCriteria = backRef.twist(getSelectionCriteria(), builder);
            if (query.getSelectionCriteria() != null) {
                // For bug 2612567, any query can have batch attributes, so the
                // original selection criteria can be quite complex, with multiple
                // builders (i.e. for parallel selects).
                // Now uses cloneUsing(newBase) instead of rebuildOn(newBase).

View Full Code Here

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