org.eclipse.persistence.internal.jpa.parsing.EqualsAssignmentNode Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction 346465e
There is a newer version: 5.0.0-B05
/*******************************************************************************
 * Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 ******************************************************************************/  
package org.eclipse.persistence.internal.jpa.parsing;

import org.eclipse.persistence.exceptions.JPQLException;

/**
 * INTERNAL:
 * EqualsAssignmentNode is implemented to distinguish nodes that hold updates in an update
 * query from other BinaryOperatorNodes
 */
public class EqualsAssignmentNode extends BinaryOperatorNode {

    /**
     * INTERNAL
     * Validate the current node and calculates its type.
     */
    public void validate(ParseTreeContext context) {
        // look for any field access that is not qualified with an variable
        super.validate(context);
        validateTarget(left, context);
    }

    /** */
    private void validateTarget(Node node, ParseTreeContext context) {
        if (node.isDotNode()) {
            TypeHelper typeHelper = context.getTypeHelper();
            Node path = node.getLeft();
            Object type = path.getType();
            AttributeNode attributeNode = (AttributeNode)node.getRight();
            String attribute = attributeNode.getAttributeName();
            if (typeHelper.isSingleValuedRelationship(type, attribute) || 
                typeHelper.isSimpleStateAttribute(type, attribute)) {
                validateNavigation(path, context);
            } else {
                throw JPQLException.invalidSetClauseTarget(
                    context.getQueryInfo(), attributeNode.getLine(), 
                    attributeNode.getColumn(), path.getAsString(), attribute);
            }
        }
    }

    /** */
    private void validateNavigation(Node qualifier, ParseTreeContext context) {
        if (qualifier.isDotNode()) {
            TypeHelper typeHelper = context.getTypeHelper();
            Node left = qualifier.getLeft();
            AttributeNode attributeNode = (AttributeNode)qualifier.getRight();
            String attribute = attributeNode.getAttributeName();
            Object type = left.getType();
            if (!typeHelper.isEmbeddedAttribute(type, attribute)) {
                throw JPQLException.invalidSetClauseNavigation(
                    context.getQueryInfo(), attributeNode.getLine(), 
                    attributeNode.getColumn(), qualifier.getAsString(), attribute);
            }
            validateNavigation(left, context);
        }
    }
    
}