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 f2b9fc5

There is a newer version: 5.0.0-B03

/*
 * Copyright (c) 1998, 2018 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 v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// 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);
        }
    }

}