Source Code Cross Referenced for MethodNode.java in  » Testing » Ejb3Unit » org » ejb3unit » asm » tree » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » Ejb3Unit » org.ejb3unit.asm.tree 
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 org.ejb3unit.asm.tree;
030:
031:        import org.ejb3unit.asm.AnnotationVisitor;
032:        import org.ejb3unit.asm.Attribute;
033:        import org.ejb3unit.asm.ClassVisitor;
034:        import org.ejb3unit.asm.Label;
035:        import org.ejb3unit.asm.MethodVisitor;
036:        import org.ejb3unit.asm.Opcodes;
037:        import org.ejb3unit.asm.Type;
038:
039:        import java.util.List;
040:        import java.util.ArrayList;
041:        import java.util.Arrays;
042:
043:        /**
044:         * A node that represents a method.
045:         * 
046:         * @author Eric Bruneton
047:         */
048:        public class MethodNode extends MemberNode implements  MethodVisitor {
049:
050:            /**
051:             * The method's access flags (see {@link Opcodes}). This field also
052:             * indicates if the method is synthetic and/or deprecated.
053:             */
054:            public int access;
055:
056:            /**
057:             * The method's name.
058:             */
059:            public String name;
060:
061:            /**
062:             * The method's descriptor (see {@link Type}).
063:             */
064:            public String desc;
065:
066:            /**
067:             * The method's signature. May be <tt>null</tt>.
068:             */
069:            public String signature;
070:
071:            /**
072:             * The internal names of the method's exception classes (see
073:             * {@link Type#getInternalName() getInternalName}). This list is a list of
074:             * {@link String} objects.
075:             */
076:            public List exceptions;
077:
078:            /**
079:             * The default value of this annotation interface method. This field must be
080:             * a {@link Byte}, {@link Boolean}, {@link Character}, {@link Short},
081:             * {@link Integer}, {@link Long}, {@link Float}, {@link Double},
082:             * {@link String} or {@link Type}, or an two elements String array (for
083:             * enumeration values), a {@link AnnotationNode}, or a {@link List} of
084:             * values of one of the preceding types. May be <tt>null</tt>.
085:             */
086:            public Object annotationDefault;
087:
088:            /**
089:             * The runtime visible parameter annotations of this method. These lists are
090:             * lists of {@link AnnotationNode} objects. May be <tt>null</tt>.
091:             * 
092:             * @associates org.objectweb.asm.tree.AnnotationNode
093:             * @label invisible parameters
094:             */
095:            public List[] visibleParameterAnnotations;
096:
097:            /**
098:             * The runtime invisible parameter annotations of this method. These lists
099:             * are lists of {@link AnnotationNode} objects. May be <tt>null</tt>.
100:             * 
101:             * @associates org.objectweb.asm.tree.AnnotationNode
102:             * @label visible parameters
103:             */
104:            public List[] invisibleParameterAnnotations;
105:
106:            /**
107:             * The instructions of this method. This list is a list of
108:             * {@link AbstractInsnNode} objects.
109:             * 
110:             * @associates org.objectweb.asm.tree.AbstractInsnNode
111:             * @label instructions
112:             */
113:            public InsnList instructions;
114:
115:            /**
116:             * The try catch blocks of this method. This list is a list of
117:             * {@link TryCatchBlockNode} objects.
118:             * 
119:             * @associates org.objectweb.asm.tree.TryCatchBlockNode
120:             */
121:            public List tryCatchBlocks;
122:
123:            /**
124:             * The maximum stack size of this method.
125:             */
126:            public int maxStack;
127:
128:            /**
129:             * The maximum number of local variables of this method.
130:             */
131:            public int maxLocals;
132:
133:            /**
134:             * The local variables of this method. This list is a list of
135:             * {@link LocalVariableNode} objects. May be <tt>null</tt>
136:             * 
137:             * @associates org.objectweb.asm.tree.LocalVariableNode
138:             */
139:            public List localVariables;
140:
141:            /**
142:             * Constructs an unitialized {@link MethodNode}.
143:             */
144:            public MethodNode() {
145:                this .instructions = new InsnList();
146:            }
147:
148:            /**
149:             * Constructs a new {@link MethodNode}.
150:             * 
151:             * @param access the method's access flags (see {@link Opcodes}). This
152:             *        parameter also indicates if the method is synthetic and/or
153:             *        deprecated.
154:             * @param name the method's name.
155:             * @param desc the method's descriptor (see {@link Type}).
156:             * @param signature the method's signature. May be <tt>null</tt>.
157:             * @param exceptions the internal names of the method's exception classes
158:             *        (see {@link Type#getInternalName() getInternalName}). May be
159:             *        <tt>null</tt>.
160:             */
161:            public MethodNode(final int access, final String name,
162:                    final String desc, final String signature,
163:                    final String[] exceptions) {
164:                this ();
165:                this .access = access;
166:                this .name = name;
167:                this .desc = desc;
168:                this .signature = signature;
169:                this .exceptions = new ArrayList(exceptions == null ? 0
170:                        : exceptions.length);
171:                boolean isAbstract = (access & Opcodes.ACC_ABSTRACT) != 0;
172:                if (!isAbstract) {
173:                    this .localVariables = new ArrayList(5);
174:                }
175:                this .tryCatchBlocks = new ArrayList();
176:                if (exceptions != null) {
177:                    this .exceptions.addAll(Arrays.asList(exceptions));
178:                }
179:            }
180:
181:            // ------------------------------------------------------------------------
182:            // Implementation of the MethodVisitor interface
183:            // ------------------------------------------------------------------------
184:
185:            public AnnotationVisitor visitAnnotationDefault() {
186:                return new AnnotationNode(new ArrayList(0) {
187:                    public boolean add(final Object o) {
188:                        annotationDefault = o;
189:                        return super .add(o);
190:                    }
191:                });
192:            }
193:
194:            public AnnotationVisitor visitParameterAnnotation(
195:                    final int parameter, final String desc,
196:                    final boolean visible) {
197:                AnnotationNode an = new AnnotationNode(desc);
198:                if (visible) {
199:                    if (visibleParameterAnnotations == null) {
200:                        int params = Type.getArgumentTypes(this .desc).length;
201:                        visibleParameterAnnotations = new List[params];
202:                    }
203:                    if (visibleParameterAnnotations[parameter] == null) {
204:                        visibleParameterAnnotations[parameter] = new ArrayList(
205:                                1);
206:                    }
207:                    visibleParameterAnnotations[parameter].add(an);
208:                } else {
209:                    if (invisibleParameterAnnotations == null) {
210:                        int params = Type.getArgumentTypes(this .desc).length;
211:                        invisibleParameterAnnotations = new List[params];
212:                    }
213:                    if (invisibleParameterAnnotations[parameter] == null) {
214:                        invisibleParameterAnnotations[parameter] = new ArrayList(
215:                                1);
216:                    }
217:                    invisibleParameterAnnotations[parameter].add(an);
218:                }
219:                return an;
220:            }
221:
222:            public void visitCode() {
223:            }
224:
225:            public void visitFrame(final int type, final int nLocal,
226:                    final Object[] local, final int nStack, final Object[] stack) {
227:                instructions.add(new FrameNode(type, nLocal,
228:                        local == null ? null : labelNodes(local), nStack,
229:                        stack == null ? null : labelNodes(stack)));
230:            }
231:
232:            public void visitInsn(final int opcode) {
233:                instructions.add(new InsnNode(opcode));
234:            }
235:
236:            public void visitIntInsn(final int opcode, final int operand) {
237:                instructions.add(new IntInsnNode(opcode, operand));
238:            }
239:
240:            public void visitVarInsn(final int opcode, final int var) {
241:                instructions.add(new VarInsnNode(opcode, var));
242:            }
243:
244:            public void visitTypeInsn(final int opcode, final String desc) {
245:                instructions.add(new TypeInsnNode(opcode, desc));
246:            }
247:
248:            public void visitFieldInsn(final int opcode, final String owner,
249:                    final String name, final String desc) {
250:                instructions.add(new FieldInsnNode(opcode, owner, name, desc));
251:            }
252:
253:            public void visitMethodInsn(final int opcode, final String owner,
254:                    final String name, final String desc) {
255:                instructions.add(new MethodInsnNode(opcode, owner, name, desc));
256:            }
257:
258:            public void visitJumpInsn(final int opcode, final Label label) {
259:                instructions.add(new JumpInsnNode(opcode, labelNode(label)));
260:            }
261:
262:            public void visitLabel(final Label label) {
263:                instructions.add(labelNode(label));
264:            }
265:
266:            public void visitLdcInsn(final Object cst) {
267:                instructions.add(new LdcInsnNode(cst));
268:            }
269:
270:            public void visitIincInsn(final int var, final int increment) {
271:                instructions.add(new IincInsnNode(var, increment));
272:            }
273:
274:            public void visitTableSwitchInsn(final int min, final int max,
275:                    final Label dflt, final Label[] labels) {
276:                instructions.add(new TableSwitchInsnNode(min, max,
277:                        labelNode(dflt), labelNodes(labels)));
278:            }
279:
280:            public void visitLookupSwitchInsn(final Label dflt,
281:                    final int[] keys, final Label[] labels) {
282:                instructions.add(new LookupSwitchInsnNode(labelNode(dflt),
283:                        keys, labelNodes(labels)));
284:            }
285:
286:            public void visitMultiANewArrayInsn(final String desc,
287:                    final int dims) {
288:                instructions.add(new MultiANewArrayInsnNode(desc, dims));
289:            }
290:
291:            public void visitTryCatchBlock(final Label start, final Label end,
292:                    final Label handler, final String type) {
293:                tryCatchBlocks.add(new TryCatchBlockNode(labelNode(start),
294:                        labelNode(end), labelNode(handler), type));
295:            }
296:
297:            public void visitLocalVariable(final String name,
298:                    final String desc, final String signature,
299:                    final Label start, final Label end, final int index) {
300:                localVariables.add(new LocalVariableNode(name, desc, signature,
301:                        labelNode(start), labelNode(end), index));
302:            }
303:
304:            public void visitLineNumber(final int line, final Label start) {
305:                instructions.add(new LineNumberNode(line, labelNode(start)));
306:            }
307:
308:            public void visitMaxs(final int maxStack, final int maxLocals) {
309:                this .maxStack = maxStack;
310:                this .maxLocals = maxLocals;
311:            }
312:
313:            private static LabelNode labelNode(final Label l) {
314:                if (l.info == null) {
315:                    l.info = new LabelNode(l);
316:                }
317:                return (LabelNode) l.info;
318:            }
319:
320:            private static LabelNode[] labelNodes(final Label[] l) {
321:                LabelNode[] nodes = new LabelNode[l.length];
322:                for (int i = 0; i < l.length; ++i) {
323:                    nodes[i] = labelNode(l[i]);
324:                }
325:                return nodes;
326:            }
327:
328:            private static Object[] labelNodes(final Object[] objs) {
329:                Object[] nodes = new Object[objs.length];
330:                for (int i = 0; i < objs.length; ++i) {
331:                    Object o = objs[i];
332:                    if (o instanceof  Label) {
333:                        o = labelNode((Label) o);
334:                    }
335:                    nodes[i] = o;
336:                }
337:                return nodes;
338:            }
339:
340:            // ------------------------------------------------------------------------
341:            // Accept method
342:            // ------------------------------------------------------------------------
343:
344:            /**
345:             * Makes the given class visitor visit this method.
346:             * 
347:             * @param cv a class visitor.
348:             */
349:            public void accept(final ClassVisitor cv) {
350:                String[] exceptions = new String[this .exceptions.size()];
351:                this .exceptions.toArray(exceptions);
352:                MethodVisitor mv = cv.visitMethod(access, name, desc,
353:                        signature, exceptions);
354:                if (mv != null) {
355:                    accept(mv);
356:                }
357:            }
358:
359:            /**
360:             * Makes the given method visitor visit this method.
361:             * 
362:             * @param mv a method visitor.
363:             */
364:            public void accept(final MethodVisitor mv) {
365:                // visits the method attributes
366:                int i, j, n;
367:                if (annotationDefault != null) {
368:                    AnnotationVisitor av = mv.visitAnnotationDefault();
369:                    AnnotationNode.accept(av, null, annotationDefault);
370:                    if (av != null) {
371:                        av.visitEnd();
372:                    }
373:                }
374:                n = visibleAnnotations == null ? 0 : visibleAnnotations.size();
375:                for (i = 0; i < n; ++i) {
376:                    AnnotationNode an = (AnnotationNode) visibleAnnotations
377:                            .get(i);
378:                    an.accept(mv.visitAnnotation(an.desc, true));
379:                }
380:                n = invisibleAnnotations == null ? 0 : invisibleAnnotations
381:                        .size();
382:                for (i = 0; i < n; ++i) {
383:                    AnnotationNode an = (AnnotationNode) invisibleAnnotations
384:                            .get(i);
385:                    an.accept(mv.visitAnnotation(an.desc, false));
386:                }
387:                n = visibleParameterAnnotations == null ? 0
388:                        : visibleParameterAnnotations.length;
389:                for (i = 0; i < n; ++i) {
390:                    List l = visibleParameterAnnotations[i];
391:                    if (l == null) {
392:                        continue;
393:                    }
394:                    for (j = 0; j < l.size(); ++j) {
395:                        AnnotationNode an = (AnnotationNode) l.get(j);
396:                        an
397:                                .accept(mv.visitParameterAnnotation(i, an.desc,
398:                                        true));
399:                    }
400:                }
401:                n = invisibleParameterAnnotations == null ? 0
402:                        : invisibleParameterAnnotations.length;
403:                for (i = 0; i < n; ++i) {
404:                    List l = invisibleParameterAnnotations[i];
405:                    if (l == null) {
406:                        continue;
407:                    }
408:                    for (j = 0; j < l.size(); ++j) {
409:                        AnnotationNode an = (AnnotationNode) l.get(j);
410:                        an.accept(mv
411:                                .visitParameterAnnotation(i, an.desc, false));
412:                    }
413:                }
414:                n = attrs == null ? 0 : attrs.size();
415:                for (i = 0; i < n; ++i) {
416:                    mv.visitAttribute((Attribute) attrs.get(i));
417:                }
418:                // visits the method's code
419:                if (instructions.size() > 0) {
420:                    mv.visitCode();
421:                    // visits try catch blocks
422:                    for (i = 0; i < tryCatchBlocks.size(); ++i) {
423:                        ((TryCatchBlockNode) tryCatchBlocks.get(i)).accept(mv);
424:                    }
425:                    // visits instructions
426:                    instructions.accept(mv);
427:                    // visits local variables
428:                    n = localVariables == null ? 0 : localVariables.size();
429:                    for (i = 0; i < n; ++i) {
430:                        ((LocalVariableNode) localVariables.get(i)).accept(mv);
431:                    }
432:                    // visits maxs
433:                    mv.visitMaxs(maxStack, maxLocals);
434:                }
435:                mv.visitEnd();
436:            }
437:        }
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