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: * <p><b>Purpose</b>: Represent JOIN identification variable
044: * declaration as part of the FROM clause: JOIN c.orders o.
045: * <p><b>Responsibilities</b>:<ul>
046: * <li> Manage the path node and the outer join flag of the JOIN clause.
047: * </ul>
048: */
049: public class JoinDeclNode extends IdentificationVariableDeclNode {
050:
051: private Node path;
052: private boolean outerJoin;
053:
054: /** */
055: public Node getPath() {
056: return path;
057: }
058:
059: /** */
060: public void setPath(Node node) {
061: path = node;
062: }
063:
064: /** */
065: public boolean isOuterJoin() {
066: return outerJoin;
067: }
068:
069: /** */
070: public void setOuterJoin(boolean outerJoin) {
071: this .outerJoin = outerJoin;
072: }
073:
074: /**
075: * INTERNAL
076: * Check the path child node for an unqualified field access and if so,
077: * replace it by a qualified field access.
078: */
079: public Node qualifyAttributeAccess(ParseTreeContext context) {
080: if (path != null) {
081: path = path.qualifyAttributeAccess(context);
082: }
083: return this ;
084: }
085:
086: /**
087: * INTERNAL
088: * Validate node and calculate its type.
089: */
090: public void validate(ParseTreeContext context) {
091: super .validate(context);
092: if (path != null) {
093: path.validate(context);
094: setType(path.getType());
095:
096: // join of embedded attribute is not supported.
097: if (path.isDotNode()) {
098: TypeHelper typeHelper = context.getTypeHelper();
099: VariableNode left = (VariableNode) path.getLeft();
100: AttributeNode right = (AttributeNode) path.getRight();
101: if ((left != null) && (right != null)) {
102: if (typeHelper.isEmbeddedAttribute(left.getType(),
103: right.getAttributeName()))
104: throw EJBQLException.unsupportJoinArgument(
105: context.getQueryInfo(), getLine(),
106: getColumn(), "Join", getType()
107: .toString());
108: }
109: }
110: }
111: }
112: }
|