001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036:
037: package com.sun.xml.ws.server.sei;
038:
039: import com.sun.xml.ws.model.ParameterImpl;
040: import com.sun.xml.ws.api.model.Parameter;
041:
042: import javax.jws.WebParam.Mode;
043: import javax.xml.ws.Holder;
044:
045: /**
046: * Gets a value from an object that represents a parameter passed
047: * as a method argument.
048: *
049: * <p>
050: * This abstraction hides the handling of {@link Holder}.
051: *
052: * <p>
053: * {@link ValueGetter} is a stateless behavior encapsulation.
054: *
055: * @author Kohsuke Kawaguchi
056: */
057: enum ValueGetter {
058: /**
059: * {@link ValueGetter} that works for {@link Mode#IN} parameter.
060: *
061: * <p>
062: * Since it's the IN mode, the parameter is not a {@link Holder},
063: * therefore the parameter itself is a value.
064: */
065: PLAIN() {
066: Object get(Object parameter) {
067: return parameter;
068: }
069: },
070: /**
071: * Creates {@link ValueGetter} that works for {@link Holder},
072: * which is {@link Mode#INOUT} or {@link Mode#OUT}.
073: *
074: * <p>
075: * In those {@link Mode}s, the parameter is a {@link Holder},
076: * so the value to be sent is obtained by getting the value of the holder.
077: */
078: HOLDER() {
079: Object get(Object parameter) {
080: if (parameter == null)
081: // the user is allowed to pass in null where a Holder is expected.
082: return null;
083: return ((Holder) parameter).value;
084: }
085: };
086:
087: /**
088: * Gets the value to be sent, from a parameter given as a method argument.
089: */
090: abstract Object get(Object parameter);
091:
092: /**
093: * Returns a {@link ValueGetter} suitable for the given {@link Parameter}.
094: */
095: static ValueGetter get(ParameterImpl p) {
096: // return value is always PLAIN
097: if (p.getMode() == Mode.IN || p.getIndex() == -1) {
098: return PLAIN;
099: } else {
100: return HOLDER;
101: }
102: }
103: }
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