1 /*
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2002 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 */
54 package net.sf.cglib;
55
56 import java.lang.reflect.Method;
57 import java.lang.reflect.Modifier;
58 import java.util.*;
59 import net.sf.cglib.core.*;
60 import org.objectweb.asm.Label;
61 import org.objectweb.asm.Type;
62
63 class LazyLoaderGenerator implements CallbackGenerator {
64 public static final LazyLoaderGenerator INSTANCE = new LazyLoaderGenerator();
65
66 private static final String DELEGATE = "CGLIB$LAZY_LOADER";
67 private static final Signature LOAD_PRIVATE =
68 TypeUtils.parseSignature("Object CGLIB$LOAD_PRIVATE()");
69 private static final Signature LOAD_OBJECT =
70 TypeUtils.parseSignature("Object loadObject(String)");
71 private static final Type LAZY_LOADER =
72 TypeUtils.parseType("net.sf.cglib.LazyLoader");
73
74 public void generate(ClassEmitter ce, final Context context) {
75 ce.declare_field(Constants.ACC_PRIVATE, DELEGATE, Constants.TYPE_OBJECT, null);
76
77 CodeEmitter e = ce.begin_method(Constants.ACC_PRIVATE |
78 Constants.ACC_SYNCHRONIZED |
79 Constants.ACC_FINAL,
80 LOAD_PRIVATE,
81 null);
82 e.load_this();
83 e.getfield(DELEGATE);
84 e.dup();
85 Label end = e.make_label();
86 e.ifnonnull(end);
87 e.pop();
88 e.load_this();
89 context.emitCallback(e);
90 e.invoke_interface(LAZY_LOADER, LOAD_OBJECT);
91 e.dup_x1();
92 e.putfield(DELEGATE);
93 e.mark(end);
94 e.return_value();
95 e.end_method();
96
97 for (Iterator it = context.getMethods(); it.hasNext();) {
98 Method method = (Method)it.next();
99 if (Modifier.isProtected(method.getModifiers())) {
100 // ignore protected methods
101 } else {
102 e = ce.begin_method(context.getModifiers(method),
103 ReflectUtils.getSignature(method),
104 ReflectUtils.getExceptionTypes(method));
105 e.load_this();
106 e.dup();
107 e.invoke_virtual_this(LOAD_PRIVATE);
108 e.checkcast(Type.getType(method.getDeclaringClass()));
109 e.load_args();
110 e.invoke(method);
111 e.return_value();
112 e.end_method();
113 }
114 }
115 }
116
117 public void generateStatic(CodeEmitter e, Context context) { }
118 }
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