Source Code Cross Referenced for Proxy.java in  » Scripting » groovy-1.0 » groovy » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » groovy 1.0 » groovy.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * $Id: Proxy.java 4098 2006-10-10 16:09:48Z blackdrag $
03:         * 
04:         * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
05:         * 
06:         * Redistribution and use of this software and associated documentation
07:         * ("Software"), with or without modification, are permitted provided that the
08:         * following conditions are met: 1. Redistributions of source code must retain
09:         * copyright statements and notices. Redistributions must also contain a copy
10:         * of this document. 2. Redistributions in binary form must reproduce the above
11:         * copyright notice, this list of conditions and the following disclaimer in
12:         * the documentation and/or other materials provided with the distribution. 3.
13:         * The name "groovy" must not be used to endorse or promote products derived
14:         * from this Software without prior written permission of The Codehaus. For
15:         * written permission, please contact info@codehaus.org. 4. Products derived
16:         * from this Software may not be called "groovy" nor may "groovy" appear in
17:         * their names without prior written permission of The Codehaus. "groovy" is a
18:         * registered trademark of The Codehaus. 5. Due credit should be given to The
19:         * Codehaus - http://groovy.codehaus.org/
20:         * 
21:         * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
22:         * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23:         * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24:         * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
25:         * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26:         * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27:         * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28:         * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29:         * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30:         * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
31:         * DAMAGE.
32:         *  
33:         */
34:        package groovy.util;
35:
36:        import java.util.Iterator;
37:
38:        import groovy.lang.GroovyObjectSupport;
39:        import groovy.lang.MissingMethodException;
40:        import org.codehaus.groovy.runtime.InvokerHelper;
41:
42:        /**
43:         * Dynamic groovy proxy for another object.  All method
44:         * invocations get forwarded to actual object, unless the proxy overrides it.
45:         * See groovy/util/ProxyTest.groovy for usage details.
46:         *
47:         * @author Troy Heninger
48:         * @author Dierk Koenig
49:         */
50:        public class Proxy extends GroovyObjectSupport {
51:
52:            private Object adaptee = null;
53:
54:            /**
55:             * This method is for convenience.
56:             * It allows to get around the need for defining dump ctors is subclasses.
57:             * See unit tests for details.
58:             */
59:            public Proxy wrap(Object adaptee) {
60:                setAdaptee(adaptee);
61:                return this ;
62:            }
63:
64:            public Object getAdaptee() {
65:                return adaptee;
66:            }
67:
68:            public void setAdaptee(Object adaptee) {
69:                this .adaptee = adaptee;
70:            }
71:
72:            public Object invokeMethod(String name, Object args) {
73:                try {
74:                    return super .invokeMethod(name, args);
75:                } catch (MissingMethodException e) {
76:                    return InvokerHelper.getMetaClass(adaptee).invokeMethod(
77:                            adaptee, name, args);
78:                }
79:            }
80:
81:            public Iterator iterator() {
82:                return InvokerHelper.asIterator(adaptee);
83:            }
84:
85:        }
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