Source Code Cross Referenced for CodeVisitor.java in  » Scripting » beanshell » bsh » org » objectweb » asm » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » beanshell » bsh.org.objectweb.asm 
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 INRIA, France Telecom
004:         * Copyright (C) 2002 France Telecom
005:         *
006:         * This library is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU Lesser General Public
008:         * License as published by the Free Software Foundation; either
009:         * version 2 of the License, or (at your option) any later version.
010:         *
011:         * This library is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         * Lesser General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU Lesser General Public
017:         * License along with this library; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         * Contact: Eric.Bruneton@rd.francetelecom.com
021:         *
022:         * Author: Eric Bruneton
023:         */package bsh.org.objectweb.asm;
024:
025:        /**
026:         * A visitor to visit the bytecode instructions of a Java method. The methods
027:         * of this visitor must be called in the sequential order of the bytecode
028:         * instructions of the visited code. The {@link #visitMaxs visitMaxs} method
029:         * must be called after all the instructions have been visited. The {@link
030:         * #visitTryCatchBlock visitTryCatchBlock}, {@link #visitLocalVariable
031:         * visitLocalVariable} and {@link #visitLineNumber visitLineNumber} methods may
032:         * be called in any order, at any time (provided the labels passed as arguments
033:         * have already been visited with {@link #visitLabel visitLabel}).
034:         */
035:
036:        public interface CodeVisitor {
037:
038:            /**
039:             * Visits a zero operand instruction.
040:             *
041:             * @param opcode the opcode of the instruction to be visited. This opcode is
042:             *      either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
043:             *      ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
044:             *      FCONST_2, DCONST_0, DCONST_1,
045:             *
046:             *      IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
047:             *      IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
048:             *      SASTORE,
049:             *
050:             *      POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
051:             *
052:             *      IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
053:             *      DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
054:             *      FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
055:             *      LOR, IXOR, LXOR,
056:             *
057:             *      I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
058:             *      I2S,
059:             *
060:             *      LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
061:             *
062:             *      IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
063:             *
064:             *      ARRAYLENGTH,
065:             *
066:             *      ATHROW,
067:             *
068:             *      MONITORENTER, or MONITOREXIT.
069:             */
070:
071:            void visitInsn(int opcode);
072:
073:            /**
074:             * Visits an instruction with a single int operand.
075:             *
076:             * @param opcode the opcode of the instruction to be visited. This opcode is
077:             *      either BIPUSH, SIPUSH or NEWARRAY.
078:             * @param operand the operand of the instruction to be visited.
079:             */
080:
081:            void visitIntInsn(int opcode, int operand);
082:
083:            /**
084:             * Visits a local variable instruction. A local variable instruction is an
085:             * instruction that loads or stores the value of a local variable.
086:             *
087:             * @param opcode the opcode of the local variable instruction to be visited.
088:             *      This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE,
089:             *      LSTORE, FSTORE, DSTORE, ASTORE or RET.
090:             * @param var the operand of the instruction to be visited. This operand is
091:             *      the index of a local variable.
092:             */
093:
094:            void visitVarInsn(int opcode, int var);
095:
096:            /**
097:             * Visits a type instruction. A type instruction is an instruction that
098:             * takes a type descriptor as parameter.
099:             *
100:             * @param opcode the opcode of the type instruction to be visited. This opcode
101:             *      is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
102:             * @param desc the operand of the instruction to be visited. This operand is
103:             *      must be a fully qualified class name in internal form, or the type
104:             *      descriptor of an array type (see {@link Type Type}).
105:             */
106:
107:            void visitTypeInsn(int opcode, String desc);
108:
109:            /**
110:             * Visits a field instruction. A field instruction is an instruction that
111:             * loads or stores the value of a field of an object.
112:             *
113:             * @param opcode the opcode of the type instruction to be visited. This opcode
114:             *      is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
115:             * @param owner the internal name of the field's owner class (see {@link
116:             *      Type#getInternalName getInternalName}).
117:             * @param name the field's name.
118:             * @param desc the field's descriptor (see {@link Type Type}).
119:             */
120:
121:            void visitFieldInsn(int opcode, String owner, String name,
122:                    String desc);
123:
124:            /**
125:             * Visits a method instruction. A method instruction is an instruction that
126:             * invokes a method.
127:             *
128:             * @param opcode the opcode of the type instruction to be visited. This opcode
129:             *      is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
130:             *      INVOKEINTERFACE.
131:             * @param owner the internal name of the method's owner class (see {@link
132:             *      Type#getInternalName getInternalName}).
133:             * @param name the method's name.
134:             * @param desc the method's descriptor (see {@link Type Type}).
135:             */
136:
137:            void visitMethodInsn(int opcode, String owner, String name,
138:                    String desc);
139:
140:            /**
141:             * Visits a jump instruction. A jump instruction is an instruction that may
142:             * jump to another instruction.
143:             *
144:             * @param opcode the opcode of the type instruction to be visited. This opcode
145:             *      is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE,
146:             *      IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
147:             *      GOTO, JSR, IFNULL or IFNONNULL.
148:             * @param label the operand of the instruction to be visited. This operand is
149:             *      a label that designates the instruction to which the jump instruction
150:             *      may jump.
151:             */
152:
153:            void visitJumpInsn(int opcode, Label label);
154:
155:            /**
156:             * Visits a label. A label designates the instruction that will be visited
157:             * just after it.
158:             *
159:             * @param label a {@link Label Label} object.
160:             */
161:
162:            void visitLabel(Label label);
163:
164:            // -------------------------------------------------------------------------
165:            // Special instructions
166:            // -------------------------------------------------------------------------
167:
168:            /**
169:             * Visits a LDC instruction.
170:             *
171:             * @param cst the constant to be loaded on the stack. This parameter must be
172:             *      a non null {@link java.lang.Integer Integer}, a {@link java.lang.Float
173:             *      Float}, a {@link java.lang.Long Long}, a {@link java.lang.Double
174:             *      Double} or a {@link String String}.
175:             */
176:
177:            void visitLdcInsn(Object cst);
178:
179:            /**
180:             * Visits an IINC instruction.
181:             *
182:             * @param var index of the local variable to be incremented.
183:             * @param increment amount to increment the local variable by.
184:             */
185:
186:            void visitIincInsn(int var, int increment);
187:
188:            /**
189:             * Visits a TABLESWITCH instruction.
190:             *
191:             * @param min the minimum key value.
192:             * @param max the maximum key value.
193:             * @param dflt beginning of the default handler block.
194:             * @param labels beginnings of the handler blocks. <tt>labels[i]</tt> is the
195:             *      beginning of the handler block for the <tt>min + i</tt> key.
196:             */
197:
198:            void visitTableSwitchInsn(int min, int max, Label dflt,
199:                    Label labels[]);
200:
201:            /**
202:             * Visits a LOOKUPSWITCH instruction.
203:             *
204:             * @param dflt beginning of the default handler block.
205:             * @param keys the values of the keys.
206:             * @param labels beginnings of the handler blocks. <tt>labels[i]</tt> is the
207:             *      beginning of the handler block for the <tt>keys[i]</tt> key.
208:             */
209:
210:            void visitLookupSwitchInsn(Label dflt, int keys[], Label labels[]);
211:
212:            /**
213:             * Visits a MULTIANEWARRAY instruction.
214:             *
215:             * @param desc an array type descriptor (see {@link Type Type}).
216:             * @param dims number of dimensions of the array to allocate.
217:             */
218:
219:            void visitMultiANewArrayInsn(String desc, int dims);
220:
221:            // -------------------------------------------------------------------------
222:            // Exceptions table entries, max stack size and max locals
223:            // -------------------------------------------------------------------------
224:
225:            /**
226:             * Visits a try catch block.
227:             *
228:             * @param start beginning of the exception handler's scope (inclusive).
229:             * @param end end of the exception handler's scope (exclusive).
230:             * @param handler beginning of the exception handler's code.
231:             * @param type internal name of the type of exceptions handled by the handler,
232:             *      or <tt>null</tt> to catch any exceptions (for "finally" blocks).
233:             * @throws IllegalArgumentException if one of the labels has not already been
234:             *      visited by this visitor (by the {@link #visitLabel visitLabel}
235:             *      method).
236:             */
237:
238:            void visitTryCatchBlock(Label start, Label end, Label handler,
239:                    String type);
240:
241:            /**
242:             * Visits the maximum stack size and the maximum number of local variables of
243:             * the method.
244:             *
245:             * @param maxStack maximum stack size of the method.
246:             * @param maxLocals maximum number of local variables for the method.
247:             */
248:
249:            void visitMaxs(int maxStack, int maxLocals);
250:
251:            // -------------------------------------------------------------------------
252:            // Debug information
253:            // -------------------------------------------------------------------------
254:
255:            /**
256:             * Visits a local variable declaration.
257:             *
258:             * @param name the name of a local variable.
259:             * @param desc the type descriptor of this local variable.
260:             * @param start the first instruction corresponding to the scope of this
261:             *      local variable (inclusive).
262:             * @param end the last instruction corresponding to the scope of this
263:             *      local variable (exclusive).
264:             * @param index the local variable's index.
265:             * @throws IllegalArgumentException if one of the labels has not already been
266:             *      visited by this visitor (by the {@link #visitLabel visitLabel}
267:             *      method).
268:             */
269:
270:            void visitLocalVariable(String name, String desc, Label start,
271:                    Label end, int index);
272:
273:            /**
274:             * Visits a line number declaration.
275:             *
276:             * @param line a line number. This number refers to the source file
277:             *      from which the class was compiled.
278:             * @param start the first instruction corresponding to this line number.
279:             * @throws IllegalArgumentException if <tt>start</tt> has not already been
280:             *      visited by this visitor (by the {@link #visitLabel visitLabel}
281:             *      method).
282:             */
283:
284:            void visitLineNumber(int line, Label start);
285:        }
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