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

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Java Source Code / Java Documentation » Net » Terracotta » com.tc.asm.util 
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.util;
030:
031:        import com.tc.asm.AnnotationVisitor;
032:        import com.tc.asm.Label;
033:        import com.tc.asm.MethodVisitor;
034:        import com.tc.asm.Opcodes;
035:
036:        import java.util.HashMap;
037:
038:        /**
039:         * A {@link MethodVisitor} that prints the ASM code that generates the methods
040:         * it visits.
041:         * 
042:         * @author Eric Bruneton
043:         * @author Eugene Kuleshov
044:         */
045:        public class ASMifierMethodVisitor extends ASMifierAbstractVisitor
046:                implements  MethodVisitor {
047:
048:            /**
049:             * Constructs a new {@link ASMifierMethodVisitor} object.
050:             */
051:            public ASMifierMethodVisitor() {
052:                super ("mv");
053:                this .labelNames = new HashMap();
054:            }
055:
056:            public AnnotationVisitor visitAnnotationDefault() {
057:                buf.setLength(0);
058:                buf.append("{\n")
059:                        .append("av0 = mv.visitAnnotationDefault();\n");
060:                text.add(buf.toString());
061:                ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);
062:                text.add(av.getText());
063:                text.add("}\n");
064:                return av;
065:            }
066:
067:            public AnnotationVisitor visitParameterAnnotation(
068:                    final int parameter, final String desc,
069:                    final boolean visible) {
070:                buf.setLength(0);
071:                buf.append("{\n").append("av0 = mv.visitParameterAnnotation(")
072:                        .append(parameter).append(", ");
073:                appendConstant(desc);
074:                buf.append(", ").append(visible).append(");\n");
075:                text.add(buf.toString());
076:                ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0);
077:                text.add(av.getText());
078:                text.add("}\n");
079:                return av;
080:            }
081:
082:            public void visitCode() {
083:                text.add("mv.visitCode();\n");
084:            }
085:
086:            public void visitFrame(final int type, final int nLocal,
087:                    final Object[] local, final int nStack, final Object[] stack) {
088:                buf.setLength(0);
089:                switch (type) {
090:                case Opcodes.F_NEW:
091:                case Opcodes.F_FULL:
092:                    declareFrameTypes(nLocal, local);
093:                    declareFrameTypes(nStack, stack);
094:                    if (type == Opcodes.F_NEW) {
095:                        buf.append("mv.visitFrame(Opcodes.F_NEW, ");
096:                    } else {
097:                        buf.append("mv.visitFrame(Opcodes.F_FULL, ");
098:                    }
099:                    buf.append(nLocal).append(", new Object[] {");
100:                    appendFrameTypes(nLocal, local);
101:                    buf.append("}, ").append(nStack).append(", new Object[] {");
102:                    appendFrameTypes(nStack, stack);
103:                    buf.append("}");
104:                    break;
105:                case Opcodes.F_APPEND:
106:                    declareFrameTypes(nLocal, local);
107:                    buf.append("mv.visitFrame(Opcodes.F_APPEND,")
108:                            .append(nLocal).append(", new Object[] {");
109:                    appendFrameTypes(nLocal, local);
110:                    buf.append("}, 0, null");
111:                    break;
112:                case Opcodes.F_CHOP:
113:                    buf.append("mv.visitFrame(Opcodes.F_CHOP,").append(nLocal)
114:                            .append(", null, 0, null");
115:                    break;
116:                case Opcodes.F_SAME:
117:                    buf
118:                            .append("mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null");
119:                    break;
120:                case Opcodes.F_SAME1:
121:                    declareFrameTypes(1, stack);
122:                    buf
123:                            .append("mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {");
124:                    appendFrameTypes(1, stack);
125:                    buf.append("}");
126:                    break;
127:                }
128:                buf.append(");\n");
129:                text.add(buf.toString());
130:            }
131:
132:            public void visitInsn(final int opcode) {
133:                buf.setLength(0);
134:                buf.append("mv.visitInsn(").append(OPCODES[opcode]).append(
135:                        ");\n");
136:                text.add(buf.toString());
137:            }
138:
139:            public void visitIntInsn(final int opcode, final int operand) {
140:                buf.setLength(0);
141:                buf.append("mv.visitIntInsn(").append(OPCODES[opcode]).append(
142:                        ", ").append(
143:                        opcode == Opcodes.NEWARRAY ? TYPES[operand] : Integer
144:                                .toString(operand)).append(");\n");
145:                text.add(buf.toString());
146:            }
147:
148:            public void visitVarInsn(final int opcode, final int var) {
149:                buf.setLength(0);
150:                buf.append("mv.visitVarInsn(").append(OPCODES[opcode]).append(
151:                        ", ").append(var).append(");\n");
152:                text.add(buf.toString());
153:            }
154:
155:            public void visitTypeInsn(final int opcode, final String desc) {
156:                buf.setLength(0);
157:                buf.append("mv.visitTypeInsn(").append(OPCODES[opcode]).append(
158:                        ", ");
159:                appendConstant(desc);
160:                buf.append(");\n");
161:                text.add(buf.toString());
162:            }
163:
164:            public void visitFieldInsn(final int opcode, final String owner,
165:                    final String name, final String desc) {
166:                buf.setLength(0);
167:                buf.append("mv.visitFieldInsn(").append(OPCODES[opcode])
168:                        .append(", ");
169:                appendConstant(owner);
170:                buf.append(", ");
171:                appendConstant(name);
172:                buf.append(", ");
173:                appendConstant(desc);
174:                buf.append(");\n");
175:                text.add(buf.toString());
176:            }
177:
178:            public void visitMethodInsn(final int opcode, final String owner,
179:                    final String name, final String desc) {
180:                buf.setLength(0);
181:                buf.append("mv.visitMethodInsn(").append(OPCODES[opcode])
182:                        .append(", ");
183:                appendConstant(owner);
184:                buf.append(", ");
185:                appendConstant(name);
186:                buf.append(", ");
187:                appendConstant(desc);
188:                buf.append(");\n");
189:                text.add(buf.toString());
190:            }
191:
192:            public void visitJumpInsn(final int opcode, final Label label) {
193:                buf.setLength(0);
194:                declareLabel(label);
195:                buf.append("mv.visitJumpInsn(").append(OPCODES[opcode]).append(
196:                        ", ");
197:                appendLabel(label);
198:                buf.append(");\n");
199:                text.add(buf.toString());
200:            }
201:
202:            public void visitLabel(final Label label) {
203:                buf.setLength(0);
204:                declareLabel(label);
205:                buf.append("mv.visitLabel(");
206:                appendLabel(label);
207:                buf.append(");\n");
208:                text.add(buf.toString());
209:            }
210:
211:            public void visitLdcInsn(final Object cst) {
212:                buf.setLength(0);
213:                buf.append("mv.visitLdcInsn(");
214:                appendConstant(cst);
215:                buf.append(");\n");
216:                text.add(buf.toString());
217:            }
218:
219:            public void visitIincInsn(final int var, final int increment) {
220:                buf.setLength(0);
221:                buf.append("mv.visitIincInsn(").append(var).append(", ")
222:                        .append(increment).append(");\n");
223:                text.add(buf.toString());
224:            }
225:
226:            public void visitTableSwitchInsn(final int min, final int max,
227:                    final Label dflt, final Label labels[]) {
228:                buf.setLength(0);
229:                for (int i = 0; i < labels.length; ++i) {
230:                    declareLabel(labels[i]);
231:                }
232:                declareLabel(dflt);
233:
234:                buf.append("mv.visitTableSwitchInsn(").append(min).append(", ")
235:                        .append(max).append(", ");
236:                appendLabel(dflt);
237:                buf.append(", new Label[] {");
238:                for (int i = 0; i < labels.length; ++i) {
239:                    buf.append(i == 0 ? " " : ", ");
240:                    appendLabel(labels[i]);
241:                }
242:                buf.append(" });\n");
243:                text.add(buf.toString());
244:            }
245:
246:            public void visitLookupSwitchInsn(final Label dflt,
247:                    final int keys[], final Label labels[]) {
248:                buf.setLength(0);
249:                for (int i = 0; i < labels.length; ++i) {
250:                    declareLabel(labels[i]);
251:                }
252:                declareLabel(dflt);
253:
254:                buf.append("mv.visitLookupSwitchInsn(");
255:                appendLabel(dflt);
256:                buf.append(", new int[] {");
257:                for (int i = 0; i < keys.length; ++i) {
258:                    buf.append(i == 0 ? " " : ", ").append(keys[i]);
259:                }
260:                buf.append(" }, new Label[] {");
261:                for (int i = 0; i < labels.length; ++i) {
262:                    buf.append(i == 0 ? " " : ", ");
263:                    appendLabel(labels[i]);
264:                }
265:                buf.append(" });\n");
266:                text.add(buf.toString());
267:            }
268:
269:            public void visitMultiANewArrayInsn(final String desc,
270:                    final int dims) {
271:                buf.setLength(0);
272:                buf.append("mv.visitMultiANewArrayInsn(");
273:                appendConstant(desc);
274:                buf.append(", ").append(dims).append(");\n");
275:                text.add(buf.toString());
276:            }
277:
278:            public void visitTryCatchBlock(final Label start, final Label end,
279:                    final Label handler, final String type) {
280:                buf.setLength(0);
281:                declareLabel(start);
282:                declareLabel(end);
283:                declareLabel(handler);
284:                buf.append("mv.visitTryCatchBlock(");
285:                appendLabel(start);
286:                buf.append(", ");
287:                appendLabel(end);
288:                buf.append(", ");
289:                appendLabel(handler);
290:                buf.append(", ");
291:                appendConstant(type);
292:                buf.append(");\n");
293:                text.add(buf.toString());
294:            }
295:
296:            public void visitLocalVariable(final String name,
297:                    final String desc, final String signature,
298:                    final Label start, final Label end, final int index) {
299:                buf.setLength(0);
300:                buf.append("mv.visitLocalVariable(");
301:                appendConstant(name);
302:                buf.append(", ");
303:                appendConstant(desc);
304:                buf.append(", ");
305:                appendConstant(signature);
306:                buf.append(", ");
307:                appendLabel(start);
308:                buf.append(", ");
309:                appendLabel(end);
310:                buf.append(", ").append(index).append(");\n");
311:                text.add(buf.toString());
312:            }
313:
314:            public void visitLineNumber(final int line, final Label start) {
315:                buf.setLength(0);
316:                buf.append("mv.visitLineNumber(").append(line).append(", ");
317:                appendLabel(start);
318:                buf.append(");\n");
319:                text.add(buf.toString());
320:            }
321:
322:            public void visitMaxs(final int maxStack, final int maxLocals) {
323:                buf.setLength(0);
324:                buf.append("mv.visitMaxs(").append(maxStack).append(", ")
325:                        .append(maxLocals).append(");\n");
326:                text.add(buf.toString());
327:            }
328:
329:            private void declareFrameTypes(final int n, final Object[] o) {
330:                for (int i = 0; i < n; ++i) {
331:                    if (o[i] instanceof  Label) {
332:                        declareLabel((Label) o[i]);
333:                    }
334:                }
335:            }
336:
337:            private void appendFrameTypes(final int n, final Object[] o) {
338:                for (int i = 0; i < n; ++i) {
339:                    if (i > 0) {
340:                        buf.append(", ");
341:                    }
342:                    if (o[i] instanceof  String) {
343:                        appendConstant(o[i]);
344:                    } else if (o[i] instanceof  Integer) {
345:                        switch (((Integer) o[i]).intValue()) {
346:                        case 0:
347:                            buf.append("Opcodes.TOP");
348:                            break;
349:                        case 1:
350:                            buf.append("Opcodes.INTEGER");
351:                            break;
352:                        case 2:
353:                            buf.append("Opcodes.FLOAT");
354:                            break;
355:                        case 3:
356:                            buf.append("Opcodes.DOUBLE");
357:                            break;
358:                        case 4:
359:                            buf.append("Opcodes.LONG");
360:                            break;
361:                        case 5:
362:                            buf.append("Opcodes.NULL");
363:                            break;
364:                        case 6:
365:                            buf.append("Opcodes.UNINITIALIZED_THIS");
366:                            break;
367:                        }
368:                    } else {
369:                        appendLabel((Label) o[i]);
370:                    }
371:                }
372:            }
373:
374:            /**
375:             * Appends a declaration of the given label to {@link #buf buf}. This
376:             * declaration is of the form "Label lXXX = new Label();". Does nothing if
377:             * the given label has already been declared.
378:             * 
379:             * @param l a label.
380:             */
381:            private void declareLabel(final Label l) {
382:                String name = (String) labelNames.get(l);
383:                if (name == null) {
384:                    name = "l" + labelNames.size();
385:                    labelNames.put(l, name);
386:                    buf.append("Label ").append(name).append(
387:                            " = new Label();\n");
388:                }
389:            }
390:
391:            /**
392:             * Appends the name of the given label to {@link #buf buf}. The given label
393:             * <i>must</i> already have a name. One way to ensure this is to always
394:             * call {@link #declareLabel declared} before calling this method.
395:             * 
396:             * @param l a label.
397:             */
398:            private void appendLabel(final Label l) {
399:                buf.append((String) labelNames.get(l));
400:            }
401:        }
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