Source Code Cross Referenced for MethodDescriptor.java in  » Development » Retrotranslator » net » sf » retrotranslator » runtime » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » Retrotranslator » net.sf.retrotranslator.runtime.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /***
002:         * Retrotranslator: a Java bytecode transformer that translates Java classes
003:         * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
004:         *
005:         * Copyright (c) 2005 - 2008 Taras Puchko
006:         * All rights reserved.
007:         *
008:         * Redistribution and use in source and binary forms, with or without
009:         * modification, are permitted provided that the following conditions
010:         * are met:
011:         * 1. Redistributions of source code must retain the above copyright
012:         *    notice, this list of conditions and the following disclaimer.
013:         * 2. Redistributions in binary form must reproduce the above copyright
014:         *    notice, this list of conditions and the following disclaimer in the
015:         *    documentation and/or other materials provided with the distribution.
016:         * 3. Neither the name of the copyright holders nor the names of its
017:         *    contributors may be used to endorse or promote products derived from
018:         *    this software without specific prior written permission.
019:         *
020:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
021:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
022:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
023:         * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
024:         * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
025:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
026:         * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
027:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
028:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
029:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
030:         * THE POSSIBILITY OF SUCH DAMAGE.
031:         */package net.sf.retrotranslator.runtime.impl;
032:
033:        import java.lang.annotation.Annotation;
034:        import java.lang.reflect.*;
035:        import java.util.*;
036:        import net.sf.retrotranslator.runtime.asm.AnnotationVisitor;
037:        import net.sf.retrotranslator.runtime.asm.signature.*;
038:
039:        /**
040:         * @author Taras Puchko
041:         */
042:        public class MethodDescriptor extends GenericDeclarationDescriptor {
043:
044:            private String name;
045:            private String desc;
046:            private ClassDescriptor classDescriptor;
047:            private LazyValue<Class, Method> method;
048:            private LazyValue<String, Class> returnType;
049:            private LazyValue<Object, Object> defaultValue;
050:            private LazyValue<Class, Constructor> constructor;
051:            private LazyValue<TypeDescriptor, Type> genericReturnType;
052:            private LazyList<TypeDescriptor, Type> genericParameterTypes;
053:            private LazyList<TypeDescriptor, Type> genericExceptionTypes;
054:            private LazyList<List<AnnotationValue>, Annotation[]> parameterAnnotations;
055:
056:            public MethodDescriptor(ClassDescriptor classDescriptor,
057:                    int access, final String name, final String desc,
058:                    String signature) {
059:                this .classDescriptor = classDescriptor;
060:                this .access = access;
061:                this .name = name;
062:                this .desc = desc;
063:                if (signature != null)
064:                    new SignatureReader(signature).accept(this );
065:                this .returnType = createReturnType();
066:                if (name.equals(RuntimeTools.CONSTRUCTOR_NAME)) {
067:                    this .constructor = createConstructor();
068:                } else if (!name.equals(RuntimeTools.STATIC_NAME)) {
069:                    this .method = createMethod();
070:                }
071:                parameterAnnotations = createParameterAnnotations();
072:            }
073:
074:            private LazyValue<String, Class> createReturnType() {
075:                return new LazyValue<String, Class>(desc) {
076:                    protected Class resolve(String input) {
077:                        return getClassByType(net.sf.retrotranslator.runtime.asm.Type
078:                                .getReturnType(input));
079:                    }
080:                };
081:            }
082:
083:            private LazyValue<Class, Constructor> createConstructor() {
084:                return new LazyValue<Class, Constructor>(classDescriptor
085:                        .getTarget()) {
086:                    protected Constructor resolve(Class input) {
087:                        for (Constructor constructor : input
088:                                .getDeclaredConstructors()) {
089:                            if (RuntimeTools.getConstructorDescriptor(
090:                                    constructor).equals(desc))
091:                                return constructor;
092:                        }
093:                        return null;
094:                    }
095:                };
096:            }
097:
098:            private LazyValue<Class, Method> createMethod() {
099:                return new LazyValue<Class, Method>(classDescriptor.getTarget()) {
100:                    protected Method resolve(Class input) {
101:                        for (Method method : input.getDeclaredMethods()) {
102:                            if (method.getName().equals(name)
103:                                    && net.sf.retrotranslator.runtime.asm.Type
104:                                            .getMethodDescriptor(method)
105:                                            .equals(desc))
106:                                return method;
107:                        }
108:                        return null;
109:                    }
110:                };
111:            }
112:
113:            public String getName() {
114:                return name;
115:            }
116:
117:            public String getDesc() {
118:                return desc;
119:            }
120:
121:            public Class getReturnType() {
122:                return returnType.get();
123:            }
124:
125:            public Object getDefaultValue() {
126:                return defaultValue == null ? null : RuntimeTools
127:                        .cloneNonEmptyArray(defaultValue.get());
128:            }
129:
130:            public static MethodDescriptor getInstance(Method method) {
131:                ClassDescriptor classDescriptor = ClassDescriptor
132:                        .getInstance(method.getDeclaringClass());
133:                String desc = net.sf.retrotranslator.runtime.asm.Type
134:                        .getMethodDescriptor(method);
135:                MethodDescriptor methodDescriptor = classDescriptor
136:                        .getMethodDescriptor(method.getName() + desc);
137:                if (methodDescriptor == null) {
138:                    methodDescriptor = new MethodDescriptor(classDescriptor,
139:                            method.getModifiers(), method.getName(), desc, null);
140:                }
141:                methodDescriptor.method.provide(method);
142:                return methodDescriptor;
143:            }
144:
145:            public static MethodDescriptor getInstance(Constructor constructor) {
146:                ClassDescriptor classDescriptor = ClassDescriptor
147:                        .getInstance(constructor.getDeclaringClass());
148:                String desc = RuntimeTools
149:                        .getConstructorDescriptor(constructor);
150:                MethodDescriptor methodDescriptor = classDescriptor
151:                        .getMethodDescriptor(RuntimeTools.CONSTRUCTOR_NAME
152:                                + desc);
153:                if (methodDescriptor == null) {
154:                    methodDescriptor = new MethodDescriptor(classDescriptor,
155:                            constructor.getModifiers(),
156:                            RuntimeTools.CONSTRUCTOR_NAME, desc, null);
157:                }
158:                methodDescriptor.constructor.provide(constructor);
159:                return methodDescriptor;
160:            }
161:
162:            public GenericDeclaration getTarget() {
163:                return method != null ? method.get()
164:                        : constructor != null ? constructor.get() : null;
165:            }
166:
167:            public Method getMethod() {
168:                return method == null ? null : method.get();
169:            }
170:
171:            public Constructor getConstructor() {
172:                return constructor == null ? null : constructor.get();
173:            }
174:
175:            public ClassDescriptor getClassDescriptor() {
176:                return classDescriptor;
177:            }
178:
179:            public String getInfo() {
180:                return RuntimeTools.getMethodInfo(classDescriptor.getInfo(),
181:                        name, desc);
182:            }
183:
184:            protected TypeVariable findTypeVariable(String name) {
185:                TypeVariable variable = getTypeVariable(name);
186:                return variable != null ? variable : classDescriptor
187:                        .findTypeVariable(name);
188:            }
189:
190:            public Annotation[][] getParameterAnnotations() {
191:                return parameterAnnotations.getClone();
192:            }
193:
194:            private LazyList<List<AnnotationValue>, Annotation[]> createParameterAnnotations() {
195:                return new LazyList<List<AnnotationValue>, Annotation[]>() {
196:                    protected Annotation[] resolve(List<AnnotationValue> input) {
197:                        return createAnnotations(input);
198:                    }
199:
200:                    protected Annotation[][] newArray(int size) {
201:                        return new Annotation[net.sf.retrotranslator.runtime.asm.Type
202:                                .getArgumentTypes(desc).length][];
203:                    }
204:                };
205:            }
206:
207:            public Type getGenericReturnType() {
208:                return genericReturnType == null ? null : genericReturnType
209:                        .get();
210:            }
211:
212:            public Type[] getGenericParameterTypes() {
213:                return genericParameterTypes == null ? null
214:                        : genericParameterTypes.getClone();
215:            }
216:
217:            public Type[] getGenericExceptionTypes() {
218:                return genericExceptionTypes == null ? null
219:                        : genericExceptionTypes.getClone();
220:            }
221:
222:            protected Annotation[] createAnnotations(
223:                    Annotation[] declaredAnnotations) {
224:                return declaredAnnotations;
225:            }
226:
227:            public AnnotationVisitor visitParameterAnnotation(int parameter,
228:                    String desc, boolean visible) {
229:                if (!visible)
230:                    return EMPTY_VISITOR;
231:                List<AnnotationValue> values = parameterAnnotations
232:                        .get(parameter);
233:                if (values == null) {
234:                    values = new ArrayList<AnnotationValue>();
235:                    parameterAnnotations.set(parameter, values);
236:                }
237:                AnnotationValue value = new AnnotationValue(desc);
238:                values.add(value);
239:                return value;
240:            }
241:
242:            public void visit(String name, Object value) {
243:                setDefaultValue(value);
244:            }
245:
246:            public void visitEnum(String name, String desc, String value) {
247:                setDefaultValue(new EnumValue(desc, value));
248:            }
249:
250:            public AnnotationVisitor visitAnnotation(String name, String desc) {
251:                AnnotationValue value = new AnnotationValue(desc);
252:                setDefaultValue(value);
253:                return value;
254:            }
255:
256:            public AnnotationVisitor visitArray(String name) {
257:                AnnotationArray array = new AnnotationArray();
258:                setDefaultValue(array);
259:                return array;
260:            }
261:
262:            public SignatureVisitor visitParameterType() {
263:                TypeDescriptor descriptor = new TypeDescriptor();
264:                if (genericParameterTypes == null)
265:                    genericParameterTypes = getLazyList();
266:                genericParameterTypes.add(descriptor);
267:                return descriptor;
268:            }
269:
270:            public SignatureVisitor visitReturnType() {
271:                TypeDescriptor descriptor = new TypeDescriptor();
272:                genericReturnType = getLazyType(descriptor);
273:                return descriptor;
274:            }
275:
276:            public SignatureVisitor visitExceptionType() {
277:                TypeDescriptor descriptor = new TypeDescriptor();
278:                if (genericExceptionTypes == null)
279:                    genericExceptionTypes = getLazyList();
280:                genericExceptionTypes.add(descriptor);
281:                return descriptor;
282:            }
283:
284:            private void setDefaultValue(Object o) {
285:                defaultValue = new LazyValue<Object, Object>(o) {
286:                    protected Object resolve(Object input) {
287:                        return resolveValue(input, getReturnType(),
288:                                MethodDescriptor.this);
289:                    }
290:                };
291:            }
292:
293:        }
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