001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * // Copyright (c) 1998, 2007, Oracle. All rights reserved.
005: *
006: *
007: * The contents of this file are subject to the terms of either the GNU
008: * General Public License Version 2 only ("GPL") or the Common Development
009: * and Distribution License("CDDL") (collectively, the "License"). You
010: * may not use this file except in compliance with the License. You can obtain
011: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
012: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
013: * language governing permissions and limitations under the License.
014: *
015: * When distributing the software, include this License Header Notice in each
016: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
017: * Sun designates this particular file as subject to the "Classpath" exception
018: * as provided by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the License
020: * Header, with the fields enclosed by brackets [] replaced by your own
021: * identifying information: "Portions Copyrighted [year]
022: * [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * If you wish your version of this file to be governed by only the CDDL or
027: * only the GPL Version 2, indicate your decision by adding "[Contributor]
028: * elects to include this software in this distribution under the [CDDL or GPL
029: * Version 2] license." If you don't indicate a single choice of license, a
030: * recipient has the option to distribute your version of this file under
031: * either the CDDL, the GPL Version 2 or to extend the choice of license to
032: * its licensees as provided above. However, if you add GPL Version 2 code
033: * and therefore, elected the GPL Version 2 license, then the option applies
034: * only if the new code is made subject to such option by the copyright
035: * holder.
036: */
037: package oracle.toplink.essentials.internal.parsing;
038:
039: import oracle.toplink.essentials.exceptions.EJBQLException;
040:
041: /**
042: * INTERNAL:
043: * EqualsAssignmentNode is implemented to distinguish nodes that hold updates in an update
044: * query from other BinaryOperatorNodes
045: */
046: public class EqualsAssignmentNode extends BinaryOperatorNode {
047:
048: /**
049: * INTERNAL
050: * Validate the current node and calculates its type.
051: */
052: public void validate(ParseTreeContext context) {
053: // look for any field access that is not qualified with an variable
054: super .validate(context);
055: validateTarget(left, context);
056: }
057:
058: /** */
059: private void validateTarget(Node node, ParseTreeContext context) {
060: if (node.isDotNode()) {
061: TypeHelper typeHelper = context.getTypeHelper();
062: Node path = node.getLeft();
063: Object type = path.getType();
064: AttributeNode attributeNode = (AttributeNode) node
065: .getRight();
066: String attribute = attributeNode.getAttributeName();
067: if (typeHelper.isSingleValuedRelationship(type, attribute)
068: || typeHelper.isSimpleStateAttribute(type,
069: attribute)) {
070: validateNavigation(path, context);
071: } else {
072: throw EJBQLException.invalidSetClauseTarget(context
073: .getQueryInfo(), attributeNode.getLine(),
074: attributeNode.getColumn(), path.getAsString(),
075: attribute);
076: }
077: }
078: }
079:
080: /** */
081: private void validateNavigation(Node qualifier,
082: ParseTreeContext context) {
083: if (qualifier.isDotNode()) {
084: TypeHelper typeHelper = context.getTypeHelper();
085: Node left = qualifier.getLeft();
086: AttributeNode attributeNode = (AttributeNode) qualifier
087: .getRight();
088: String attribute = attributeNode.getAttributeName();
089: Object type = left.getType();
090: if (!typeHelper.isEmbeddedAttribute(type, attribute)) {
091: throw EJBQLException.invalidSetClauseNavigation(context
092: .getQueryInfo(), attributeNode.getLine(),
093: attributeNode.getColumn(), qualifier
094: .getAsString(), attribute);
095: }
096: validateNavigation(left, context);
097: }
098: }
099:
100: }
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