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

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Java Source Code / Java Documentation » IDE » tIDE » org.objectweb.asm.optimizer 
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:         */
030:        package org.objectweb.asm.optimizer;
031:
032:        import java.util.HashMap;
033:
034:        import org.objectweb.asm.Type;
035:
036:        /**
037:         * A constant pool.
038:         *
039:         * @author Eric Bruneton
040:         */
041:        @SuppressWarnings("unchecked")
042:        public class ConstantPool extends HashMap {
043:
044:            private final Constant key1 = new Constant();
045:
046:            private final Constant key2 = new Constant();
047:
048:            private final Constant key3 = new Constant();
049:
050:            public Constant newInteger(final int value) {
051:                key1.set(value);
052:                Constant result = get(key1);
053:                if (result == null) {
054:                    result = new Constant(key1);
055:                    put(result);
056:                }
057:                return result;
058:            }
059:
060:            public Constant newFloat(final float value) {
061:                key1.set(value);
062:                Constant result = get(key1);
063:                if (result == null) {
064:                    result = new Constant(key1);
065:                    put(result);
066:                }
067:                return result;
068:            }
069:
070:            public Constant newLong(final long value) {
071:                key1.set(value);
072:                Constant result = get(key1);
073:                if (result == null) {
074:                    result = new Constant(key1);
075:                    put(result);
076:                }
077:                return result;
078:            }
079:
080:            public Constant newDouble(final double value) {
081:                key1.set(value);
082:                Constant result = get(key1);
083:                if (result == null) {
084:                    result = new Constant(key1);
085:                    put(result);
086:                }
087:                return result;
088:            }
089:
090:            public Constant newUTF8(final String value) {
091:                key1.set('s', value, null, null);
092:                Constant result = get(key1);
093:                if (result == null) {
094:                    result = new Constant(key1);
095:                    put(result);
096:                }
097:                return result;
098:            }
099:
100:            private Constant newString(final String value) {
101:                key2.set('S', value, null, null);
102:                Constant result = get(key2);
103:                if (result == null) {
104:                    newUTF8(value);
105:                    result = new Constant(key2);
106:                    put(result);
107:                }
108:                return result;
109:            }
110:
111:            public Constant newClass(final String value) {
112:                key2.set('C', value, null, null);
113:                Constant result = get(key2);
114:                if (result == null) {
115:                    newUTF8(value);
116:                    result = new Constant(key2);
117:                    put(result);
118:                }
119:                return result;
120:            }
121:
122:            public Constant newConst(final Object cst) {
123:                if (cst instanceof  Integer) {
124:                    int val = ((Integer) cst).intValue();
125:                    return newInteger(val);
126:                } else if (cst instanceof  Float) {
127:                    float val = ((Float) cst).floatValue();
128:                    return newFloat(val);
129:                } else if (cst instanceof  Long) {
130:                    long val = ((Long) cst).longValue();
131:                    return newLong(val);
132:                } else if (cst instanceof  Double) {
133:                    double val = ((Double) cst).doubleValue();
134:                    return newDouble(val);
135:                } else if (cst instanceof  String) {
136:                    return newString((String) cst);
137:                } else if (cst instanceof  Type) {
138:                    Type t = (Type) cst;
139:                    return newClass(t.getSort() == Type.OBJECT ? t
140:                            .getInternalName() : t.getDescriptor());
141:                } else {
142:                    throw new IllegalArgumentException("value " + cst);
143:                }
144:            }
145:
146:            public Constant newField(final String owner, final String name,
147:                    final String desc) {
148:                key3.set('G', owner, name, desc);
149:                Constant result = get(key3);
150:                if (result == null) {
151:                    newClass(owner);
152:                    newNameType(name, desc);
153:                    result = new Constant(key3);
154:                    put(result);
155:                }
156:                return result;
157:            }
158:
159:            public Constant newMethod(final String owner, final String name,
160:                    final String desc, final boolean itf) {
161:                key3.set(itf ? 'N' : 'M', owner, name, desc);
162:                Constant result = get(key3);
163:                if (result == null) {
164:                    newClass(owner);
165:                    newNameType(name, desc);
166:                    result = new Constant(key3);
167:                    put(result);
168:                }
169:                return result;
170:            }
171:
172:            public Constant newNameType(final String name, final String desc) {
173:                key2.set('T', name, desc, null);
174:                Constant result = get(key2);
175:                if (result == null) {
176:                    newUTF8(name);
177:                    newUTF8(desc);
178:                    result = new Constant(key2);
179:                    put(result);
180:                }
181:                return result;
182:            }
183:
184:            private Constant get(final Constant key) {
185:                return (Constant) get((Object) key);
186:            }
187:
188:            private void put(final Constant cst) {
189:                put(cst, cst);
190:            }
191:        }
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