Source Code Cross Referenced for Method.java in  » Net » Terracotta » com » tc » asm » commons » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » Terracotta » com.tc.asm.commons 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /***
002:         * ASM: a very small and fast Java bytecode manipulation framework
003:         * Copyright (c) 2000-2005 INRIA, France Telecom
004:         * All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         * 1. Redistributions of source code must retain the above copyright
010:         *    notice, this list of conditions and the following disclaimer.
011:         * 2. Redistributions in binary form must reproduce the above copyright
012:         *    notice, this list of conditions and the following disclaimer in the
013:         *    documentation and/or other materials provided with the distribution.
014:         * 3. Neither the name of the copyright holders nor the names of its
015:         *    contributors may be used to endorse or promote products derived from
016:         *    this software without specific prior written permission.
017:         *
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021:         * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022:         * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024:         * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
028:         * THE POSSIBILITY OF SUCH DAMAGE.
029:         */package com.tc.asm.commons;
030:
031:        import java.util.HashMap;
032:        import java.util.Map;
033:
034:        import com.tc.asm.Type;
035:
036:        /**
037:         * A named method descriptor.
038:         * 
039:         * @author Juozas Baliuka
040:         * @author Chris Nokleberg
041:         * @author Eric Bruneton
042:         */
043:        public class Method {
044:
045:            /**
046:             * The method name.
047:             */
048:            private final String name;
049:
050:            /**
051:             * The method descriptor.
052:             */
053:            private final String desc;
054:
055:            /**
056:             * Maps primitive Java type names to their descriptors.
057:             */
058:            private final static Map DESCRIPTORS;
059:
060:            static {
061:                DESCRIPTORS = new HashMap();
062:                DESCRIPTORS.put("void", "V");
063:                DESCRIPTORS.put("byte", "B");
064:                DESCRIPTORS.put("char", "C");
065:                DESCRIPTORS.put("double", "D");
066:                DESCRIPTORS.put("float", "F");
067:                DESCRIPTORS.put("int", "I");
068:                DESCRIPTORS.put("long", "J");
069:                DESCRIPTORS.put("short", "S");
070:                DESCRIPTORS.put("boolean", "Z");
071:            }
072:
073:            /**
074:             * Creates a new {@link Method}.
075:             * 
076:             * @param name the method's name.
077:             * @param desc the method's descriptor.
078:             */
079:            public Method(final String name, final String desc) {
080:                this .name = name;
081:                this .desc = desc;
082:            }
083:
084:            /**
085:             * Creates a new {@link Method}.
086:             * 
087:             * @param name the method's name.
088:             * @param returnType the method's return type.
089:             * @param argumentTypes the method's argument types.
090:             */
091:            public Method(final String name, final Type returnType,
092:                    final Type[] argumentTypes) {
093:                this (name, Type.getMethodDescriptor(returnType, argumentTypes));
094:            }
095:
096:            /**
097:             * Returns a {@link Method} corresponding to the given Java method
098:             * declaration.
099:             * 
100:             * @param method a Java method declaration, without argument names, of the
101:             *        form "returnType name (argumentType1, ... argumentTypeN)", where
102:             *        the types are in plain Java (e.g. "int", "float",
103:             *        "java.util.List", ...). Classes of the java.lang package can be
104:             *        specified by their unqualified name; all other classes names must
105:             *        be fully qualified.
106:             * @return a {@link Method} corresponding to the given Java method
107:             *         declaration.
108:             * @throws IllegalArgumentException if <code>method</code> could not get
109:             *         parsed.
110:             */
111:            public static Method getMethod(final String method)
112:                    throws IllegalArgumentException {
113:                return getMethod(method, false);
114:            }
115:
116:            /**
117:             * Returns a {@link Method} corresponding to the given Java method
118:             * declaration.
119:             * 
120:             * @param method a Java method declaration, without argument names, of the
121:             *        form "returnType name (argumentType1, ... argumentTypeN)", where
122:             *        the types are in plain Java (e.g. "int", "float",
123:             *        "java.util.List", ...). Classes of the java.lang package may be
124:             *        specified by their unqualified name, depending on the
125:             *        defaultPackage argument; all other classes names must be fully
126:             *        qualified.
127:             * @param defaultPackage true if unqualified class names belong to the
128:             *        default package, or false if they correspond to java.lang classes.
129:             *        For instance "Object" means "Object" if this option is true, or
130:             *        "java.lang.Object" otherwise.
131:             * @return a {@link Method} corresponding to the given Java method
132:             *         declaration.
133:             * @throws IllegalArgumentException if <code>method</code> could not get
134:             *         parsed.
135:             */
136:            public static Method getMethod(final String method,
137:                    final boolean defaultPackage)
138:                    throws IllegalArgumentException {
139:                int space = method.indexOf(' ');
140:                int start = method.indexOf('(', space) + 1;
141:                int end = method.indexOf(')', start);
142:                if (space == -1 || start == -1 || end == -1) {
143:                    throw new IllegalArgumentException();
144:                }
145:                // TODO: Check validity of returnType, methodName and arguments.
146:                String returnType = method.substring(0, space);
147:                String methodName = method.substring(space + 1, start - 1)
148:                        .trim();
149:                StringBuffer sb = new StringBuffer();
150:                sb.append('(');
151:                int p;
152:                do {
153:                    String s;
154:                    p = method.indexOf(',', start);
155:                    if (p == -1) {
156:                        s = map(method.substring(start, end).trim(),
157:                                defaultPackage);
158:                    } else {
159:                        s = map(method.substring(start, p).trim(),
160:                                defaultPackage);
161:                        start = p + 1;
162:                    }
163:                    sb.append(s);
164:                } while (p != -1);
165:                sb.append(')');
166:                sb.append(map(returnType, defaultPackage));
167:                return new Method(methodName, sb.toString());
168:            }
169:
170:            private static String map(final String type,
171:                    final boolean defaultPackage) {
172:                if (type.equals("")) {
173:                    return type;
174:                }
175:
176:                StringBuffer sb = new StringBuffer();
177:                int index = 0;
178:                while ((index = type.indexOf("[]", index) + 1) > 0) {
179:                    sb.append('[');
180:                }
181:
182:                String t = type.substring(0, type.length() - sb.length() * 2);
183:                String desc = (String) DESCRIPTORS.get(t);
184:                if (desc != null) {
185:                    sb.append(desc);
186:                } else {
187:                    sb.append('L');
188:                    if (t.indexOf('.') < 0) {
189:                        if (!defaultPackage) {
190:                            sb.append("java/lang/");
191:                        }
192:                        sb.append(t);
193:                    } else {
194:                        sb.append(t.replace('.', '/'));
195:                    }
196:                    sb.append(';');
197:                }
198:                return sb.toString();
199:            }
200:
201:            /**
202:             * Returns the name of the method described by this object.
203:             * 
204:             * @return the name of the method described by this object.
205:             */
206:            public String getName() {
207:                return name;
208:            }
209:
210:            /**
211:             * Returns the descriptor of the method described by this object.
212:             * 
213:             * @return the descriptor of the method described by this object.
214:             */
215:            public String getDescriptor() {
216:                return desc;
217:            }
218:
219:            /**
220:             * Returns the return type of the method described by this object.
221:             * 
222:             * @return the return type of the method described by this object.
223:             */
224:            public Type getReturnType() {
225:                return Type.getReturnType(desc);
226:            }
227:
228:            /**
229:             * Returns the argument types of the method described by this object.
230:             * 
231:             * @return the argument types of the method described by this object.
232:             */
233:            public Type[] getArgumentTypes() {
234:                return Type.getArgumentTypes(desc);
235:            }
236:
237:            public String toString() {
238:                return name + desc;
239:            }
240:
241:            public boolean equals(final Object o) {
242:                if (!(o instanceof  Method)) {
243:                    return false;
244:                }
245:                Method other = (Method) o;
246:                return name.equals(other.name) && desc.equals(other.desc);
247:            }
248:
249:            public int hashCode() {
250:                return name.hashCode() ^ desc.hashCode();
251:            }
252:        }
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