Source Code Cross Referenced for AbstractVisitor.java in  » IDE » tIDE » org » objectweb » asm » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE » tIDE » org.objectweb.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 org.objectweb.asm.util;
030:
031:        import java.io.PrintWriter;
032:        import java.util.ArrayList;
033:        import java.util.List;
034:
035:        import org.objectweb.asm.Attribute;
036:
037:        /**
038:         * An abstract visitor.
039:         *
040:         * @author Eric Bruneton
041:         */
042:        public abstract class AbstractVisitor {
043:
044:            /**
045:             * The names of the Java Virtual Machine opcodes.
046:             */
047:            public final static String[] OPCODES;
048:            /**
049:             * Types for <code>operand</code> parameter of the
050:             * {@link org.objectweb.asm.MethodVisitor#visitIntInsn} method when
051:             * <code>opcode</code> is <code>NEWARRAY</code>.
052:             */
053:            public final static String[] TYPES;
054:
055:            static {
056:                String s = "NOP,ACONST_NULL,ICONST_M1,ICONST_0,ICONST_1,ICONST_2,"
057:                        + "ICONST_3,ICONST_4,ICONST_5,LCONST_0,LCONST_1,FCONST_0,"
058:                        + "FCONST_1,FCONST_2,DCONST_0,DCONST_1,BIPUSH,SIPUSH,LDC,,,"
059:                        + "ILOAD,LLOAD,FLOAD,DLOAD,ALOAD,,,,,,,,,,,,,,,,,,,,,IALOAD,"
060:                        + "LALOAD,FALOAD,DALOAD,AALOAD,BALOAD,CALOAD,SALOAD,ISTORE,"
061:                        + "LSTORE,FSTORE,DSTORE,ASTORE,,,,,,,,,,,,,,,,,,,,,IASTORE,"
062:                        + "LASTORE,FASTORE,DASTORE,AASTORE,BASTORE,CASTORE,SASTORE,POP,"
063:                        + "POP2,DUP,DUP_X1,DUP_X2,DUP2,DUP2_X1,DUP2_X2,SWAP,IADD,LADD,"
064:                        + "FADD,DADD,ISUB,LSUB,FSUB,DSUB,IMUL,LMUL,FMUL,DMUL,IDIV,LDIV,"
065:                        + "FDIV,DDIV,IREM,LREM,FREM,DREM,INEG,LNEG,FNEG,DNEG,ISHL,LSHL,"
066:                        + "ISHR,LSHR,IUSHR,LUSHR,IAND,LAND,IOR,LOR,IXOR,LXOR,IINC,I2L,"
067:                        + "I2F,I2D,L2I,L2F,L2D,F2I,F2L,F2D,D2I,D2L,D2F,I2B,I2C,I2S,LCMP,"
068:                        + "FCMPL,FCMPG,DCMPL,DCMPG,IFEQ,IFNE,IFLT,IFGE,IFGT,IFLE,"
069:                        + "IF_ICMPEQ,IF_ICMPNE,IF_ICMPLT,IF_ICMPGE,IF_ICMPGT,IF_ICMPLE,"
070:                        + "IF_ACMPEQ,IF_ACMPNE,GOTO,JSR,RET,TABLESWITCH,LOOKUPSWITCH,"
071:                        + "IRETURN,LRETURN,FRETURN,DRETURN,ARETURN,RETURN,GETSTATIC,"
072:                        + "PUTSTATIC,GETFIELD,PUTFIELD,INVOKEVIRTUAL,INVOKESPECIAL,"
073:                        + "INVOKESTATIC,INVOKEINTERFACE,,NEW,NEWARRAY,ANEWARRAY,"
074:                        + "ARRAYLENGTH,ATHROW,CHECKCAST,INSTANCEOF,MONITORENTER,"
075:                        + "MONITOREXIT,,MULTIANEWARRAY,IFNULL,IFNONNULL,";
076:                OPCODES = new String[200];
077:                int i = 0;
078:                int j = 0;
079:                int l;
080:                while ((l = s.indexOf(',', j)) > 0) {
081:                    OPCODES[i++] = j + 1 == l ? null : s.substring(j, l);
082:                    j = l + 1;
083:                }
084:
085:                s = "T_BOOLEAN,T_CHAR,T_FLOAT,T_DOUBLE,T_BYTE,T_SHORT,T_INT,T_LONG,";
086:                TYPES = new String[12];
087:                j = 0;
088:                i = 4;
089:                while ((l = s.indexOf(',', j)) > 0) {
090:                    TYPES[i++] = s.substring(j, l);
091:                    j = l + 1;
092:                }
093:            }
094:
095:            /**
096:             * The text to be printed. Since the code of methods is not necessarily
097:             * visited in sequential order, one method after the other, but can be
098:             * interlaced (some instructions from method one, then some instructions
099:             * from method two, then some instructions from method one again...), it is
100:             * not possible to print the visited instructions directly to a sequential
101:             * stream. A class is therefore printed in a two steps process: a string
102:             * tree is constructed during the visit, and printed to a sequential stream
103:             * at the end of the visit. This string tree is stored in this field, as a
104:             * string list that can contain other string lists, which can themselves
105:             * contain other string lists, and so on.
106:             */
107:            public final List text;
108:
109:            /**
110:             * A buffer that can be used to create strings.
111:             */
112:            protected final StringBuffer buf;
113:
114:            /**
115:             * Constructs a new {@link AbstractVisitor}.
116:             */
117:            protected AbstractVisitor() {
118:                this .text = new ArrayList();
119:                this .buf = new StringBuffer();
120:            }
121:
122:            /**
123:             * Returns the text printed by this visitor.
124:             *
125:             * @return the text printed by this visitor.
126:             */
127:            public List getText() {
128:                return text;
129:            }
130:
131:            /**
132:             * Appends a quoted string to a given buffer.
133:             *
134:             * @param buf the buffer where the string must be added.
135:             * @param s the string to be added.
136:             */
137:            public static void appendString(final StringBuffer buf,
138:                    final String s) {
139:                buf.append("\"");
140:                for (int i = 0; i < s.length(); ++i) {
141:                    char c = s.charAt(i);
142:                    if (c == '\n') {
143:                        buf.append("\\n");
144:                    } else if (c == '\r') {
145:                        buf.append("\\r");
146:                    } else if (c == '\\') {
147:                        buf.append("\\\\");
148:                    } else if (c == '"') {
149:                        buf.append("\\\"");
150:                    } else if (c < 0x20 || c > 0x7f) {
151:                        buf.append("\\u");
152:                        if (c < 0x10) {
153:                            buf.append("000");
154:                        } else if (c < 0x100) {
155:                            buf.append("00");
156:                        } else if (c < 0x1000) {
157:                            buf.append("0");
158:                        }
159:                        buf.append(Integer.toString(c, 16));
160:                    } else {
161:                        buf.append(c);
162:                    }
163:                }
164:                buf.append("\"");
165:            }
166:
167:            /**
168:             * Prints the given string tree.
169:             *
170:             * @param pw the writer to be used to print the tree.
171:             * @param l a string tree, i.e., a string list that can contain other string
172:             *        lists, and so on recursively.
173:             */
174:            void printList(final PrintWriter pw, final List l) {
175:                for (int i = 0; i < l.size(); ++i) {
176:                    Object o = l.get(i);
177:                    if (o instanceof  List) {
178:                        printList(pw, (List) o);
179:                    } else {
180:                        pw.print(o.toString());
181:                    }
182:                }
183:            }
184:
185:            /**
186:             * Returns the default {@link ASMifiable} prototypes.
187:             *
188:             * @return the default {@link ASMifiable} prototypes.
189:             */
190:            public static Attribute[] getDefaultAttributes() {
191:                return new Attribute[0];
192:            }
193:        }
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