1 /* |
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.tools.classfile; |
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27 |
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28 import java.io.DataOutputStream; |
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29 import java.io.IOException; |
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30 import java.io.OutputStream; |
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31 import java.util.Iterator; |
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32 |
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33 /** |
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34 * See JVMS, section 4.5. |
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35 * |
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36 * <p><b>This is NOT part of any supported API. |
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37 * If you write code that depends on this, you do so at your own risk. |
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38 * This code and its internal interfaces are subject to change or |
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39 * deletion without notice.</b> |
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40 */ |
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41 public class ConstantPool { |
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42 |
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43 public static class InvalidIndex extends ConstantPoolException { |
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44 private static final long serialVersionUID = -4350294289300939730L; |
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45 InvalidIndex(int index) { |
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46 super(index); |
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47 } |
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48 |
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49 @Override |
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50 public String getMessage() { |
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51 // i18n |
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52 return "invalid index #" + index; |
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53 } |
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54 } |
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55 |
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56 public static class UnexpectedEntry extends ConstantPoolException { |
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57 private static final long serialVersionUID = 6986335935377933211L; |
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58 UnexpectedEntry(int index, int expected_tag, int found_tag) { |
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59 super(index); |
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60 this.expected_tag = expected_tag; |
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61 this.found_tag = found_tag; |
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62 } |
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63 |
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64 @Override |
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65 public String getMessage() { |
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66 // i18n? |
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67 return "unexpected entry at #" + index + " -- expected tag " + expected_tag + ", found " + found_tag; |
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68 } |
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69 |
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70 public final int expected_tag; |
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71 public final int found_tag; |
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72 } |
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73 |
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74 public static class InvalidEntry extends ConstantPoolException { |
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75 private static final long serialVersionUID = 1000087545585204447L; |
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76 InvalidEntry(int index, int tag) { |
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77 super(index); |
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78 this.tag = tag; |
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79 } |
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80 |
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81 @Override |
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82 public String getMessage() { |
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83 // i18n? |
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84 return "unexpected tag at #" + index + ": " + tag; |
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85 } |
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86 |
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87 public final int tag; |
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88 } |
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89 |
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90 public static class EntryNotFound extends ConstantPoolException { |
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91 private static final long serialVersionUID = 2885537606468581850L; |
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92 EntryNotFound(Object value) { |
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93 super(-1); |
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94 this.value = value; |
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95 } |
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96 |
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97 @Override |
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98 public String getMessage() { |
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99 // i18n? |
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100 return "value not found: " + value; |
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101 } |
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102 |
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103 public final Object value; |
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104 } |
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105 |
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106 public static final int CONSTANT_Utf8 = 1; |
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107 public static final int CONSTANT_Integer = 3; |
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108 public static final int CONSTANT_Float = 4; |
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109 public static final int CONSTANT_Long = 5; |
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110 public static final int CONSTANT_Double = 6; |
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111 public static final int CONSTANT_Class = 7; |
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112 public static final int CONSTANT_String = 8; |
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113 public static final int CONSTANT_Fieldref = 9; |
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114 public static final int CONSTANT_Methodref = 10; |
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115 public static final int CONSTANT_InterfaceMethodref = 11; |
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116 public static final int CONSTANT_NameAndType = 12; |
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117 public static final int CONSTANT_MethodHandle = 15; |
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118 public static final int CONSTANT_MethodType = 16; |
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119 public static final int CONSTANT_InvokeDynamic = 18; |
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120 |
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121 public static enum RefKind { |
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122 REF_getField(1, "getfield"), |
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123 REF_getStatic(2, "getstatic"), |
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124 REF_putField(3, "putfield"), |
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125 REF_putStatic(4, "putstatic"), |
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126 REF_invokeVirtual(5, "invokevirtual"), |
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127 REF_invokeStatic(6, "invokestatic"), |
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128 REF_invokeSpecial(7, "invokespecial"), |
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129 REF_newInvokeSpecial(8, "newinvokespecial"), |
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130 REF_invokeInterface(9, "invokeinterface"); |
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131 |
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132 public final int tag; |
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133 public final String name; |
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134 |
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135 RefKind(int tag, String name) { |
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136 this.tag = tag; |
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137 this.name = name; |
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138 } |
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139 |
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140 static RefKind getRefkind(int tag) { |
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141 switch(tag) { |
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142 case 1: |
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143 return REF_getField; |
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144 case 2: |
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145 return REF_getStatic; |
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146 case 3: |
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147 return REF_putField; |
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148 case 4: |
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149 return REF_putStatic; |
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150 case 5: |
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151 return REF_invokeVirtual; |
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152 case 6: |
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153 return REF_invokeStatic; |
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154 case 7: |
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155 return REF_invokeSpecial; |
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156 case 8: |
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157 return REF_newInvokeSpecial; |
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158 case 9: |
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159 return REF_invokeInterface; |
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160 default: |
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161 return null; |
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162 } |
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163 } |
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164 } |
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165 |
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166 ConstantPool(ClassReader cr) throws IOException, InvalidEntry { |
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167 int count = cr.readUnsignedShort(); |
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168 pool = new CPInfo[count]; |
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169 for (int i = 1; i < count; i++) { |
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170 int tag = cr.readUnsignedByte(); |
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171 switch (tag) { |
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172 case CONSTANT_Class: |
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173 pool[i] = new CONSTANT_Class_info(this, cr); |
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174 break; |
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175 |
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176 case CONSTANT_Double: |
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177 pool[i] = new CONSTANT_Double_info(cr); |
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178 i++; |
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179 break; |
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180 |
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181 case CONSTANT_Fieldref: |
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182 pool[i] = new CONSTANT_Fieldref_info(this, cr); |
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183 break; |
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184 |
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185 case CONSTANT_Float: |
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186 pool[i] = new CONSTANT_Float_info(cr); |
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187 break; |
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188 |
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189 case CONSTANT_Integer: |
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190 pool[i] = new CONSTANT_Integer_info(cr); |
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191 break; |
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192 |
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193 case CONSTANT_InterfaceMethodref: |
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194 pool[i] = new CONSTANT_InterfaceMethodref_info(this, cr); |
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195 break; |
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196 |
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197 case CONSTANT_InvokeDynamic: |
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198 pool[i] = new CONSTANT_InvokeDynamic_info(this, cr); |
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199 break; |
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200 |
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201 case CONSTANT_Long: |
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202 pool[i] = new CONSTANT_Long_info(cr); |
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203 i++; |
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204 break; |
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205 |
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206 case CONSTANT_MethodHandle: |
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207 pool[i] = new CONSTANT_MethodHandle_info(this, cr); |
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208 break; |
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209 |
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210 case CONSTANT_MethodType: |
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211 pool[i] = new CONSTANT_MethodType_info(this, cr); |
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212 break; |
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213 |
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214 case CONSTANT_Methodref: |
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215 pool[i] = new CONSTANT_Methodref_info(this, cr); |
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216 break; |
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217 |
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218 case CONSTANT_NameAndType: |
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219 pool[i] = new CONSTANT_NameAndType_info(this, cr); |
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220 break; |
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221 |
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222 case CONSTANT_String: |
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223 pool[i] = new CONSTANT_String_info(this, cr); |
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224 break; |
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225 |
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226 case CONSTANT_Utf8: |
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227 pool[i] = new CONSTANT_Utf8_info(cr); |
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228 break; |
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229 |
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230 default: |
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231 throw new InvalidEntry(i, tag); |
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232 } |
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233 } |
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234 } |
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235 |
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236 public ConstantPool(CPInfo[] pool) { |
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237 this.pool = pool; |
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238 } |
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239 |
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240 public int size() { |
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241 return pool.length; |
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242 } |
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243 |
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244 public int byteLength() { |
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245 int length = 2; |
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246 for (int i = 1; i < size(); ) { |
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247 CPInfo cpInfo = pool[i]; |
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248 length += cpInfo.byteLength(); |
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249 i += cpInfo.size(); |
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250 } |
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251 return length; |
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252 } |
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253 |
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254 public CPInfo get(int index) throws InvalidIndex { |
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255 if (index <= 0 || index >= pool.length) |
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256 throw new InvalidIndex(index); |
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257 CPInfo info = pool[index]; |
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258 if (info == null) { |
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259 // this occurs for indices referencing the "second half" of an |
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260 // 8 byte constant, such as CONSTANT_Double or CONSTANT_Long |
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261 throw new InvalidIndex(index); |
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262 } |
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263 return pool[index]; |
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264 } |
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265 |
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266 private CPInfo get(int index, int expected_type) throws InvalidIndex, UnexpectedEntry { |
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267 CPInfo info = get(index); |
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268 if (info.getTag() != expected_type) |
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269 throw new UnexpectedEntry(index, expected_type, info.getTag()); |
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270 return info; |
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271 } |
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272 |
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273 public CONSTANT_Utf8_info getUTF8Info(int index) throws InvalidIndex, UnexpectedEntry { |
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274 return ((CONSTANT_Utf8_info) get(index, CONSTANT_Utf8)); |
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275 } |
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276 |
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277 public CONSTANT_Class_info getClassInfo(int index) throws InvalidIndex, UnexpectedEntry { |
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278 return ((CONSTANT_Class_info) get(index, CONSTANT_Class)); |
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279 } |
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280 |
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281 public CONSTANT_NameAndType_info getNameAndTypeInfo(int index) throws InvalidIndex, UnexpectedEntry { |
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282 return ((CONSTANT_NameAndType_info) get(index, CONSTANT_NameAndType)); |
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283 } |
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284 |
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285 public String getUTF8Value(int index) throws InvalidIndex, UnexpectedEntry { |
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286 return getUTF8Info(index).value; |
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287 } |
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288 |
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289 public int getUTF8Index(String value) throws EntryNotFound { |
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290 for (int i = 1; i < pool.length; i++) { |
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291 CPInfo info = pool[i]; |
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292 if (info instanceof CONSTANT_Utf8_info && |
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293 ((CONSTANT_Utf8_info) info).value.equals(value)) |
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294 return i; |
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295 } |
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296 throw new EntryNotFound(value); |
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297 } |
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298 |
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299 public Iterable<CPInfo> entries() { |
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300 return new Iterable<CPInfo>() { |
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301 public Iterator<CPInfo> iterator() { |
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302 return new Iterator<CPInfo>() { |
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303 |
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304 public boolean hasNext() { |
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305 return next < pool.length; |
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306 } |
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307 |
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308 public CPInfo next() { |
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309 current = pool[next]; |
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310 switch (current.getTag()) { |
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311 case CONSTANT_Double: |
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312 case CONSTANT_Long: |
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313 next += 2; |
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314 break; |
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315 default: |
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316 next += 1; |
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317 } |
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318 return current; |
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319 } |
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320 |
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321 public void remove() { |
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322 throw new UnsupportedOperationException(); |
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323 } |
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324 |
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325 private CPInfo current; |
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326 private int next = 1; |
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327 |
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328 }; |
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329 } |
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330 }; |
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331 } |
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332 |
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333 private CPInfo[] pool; |
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334 |
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335 public interface Visitor<R,P> { |
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336 R visitClass(CONSTANT_Class_info info, P p); |
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337 R visitDouble(CONSTANT_Double_info info, P p); |
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338 R visitFieldref(CONSTANT_Fieldref_info info, P p); |
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339 R visitFloat(CONSTANT_Float_info info, P p); |
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340 R visitInteger(CONSTANT_Integer_info info, P p); |
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341 R visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, P p); |
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342 R visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, P p); |
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343 R visitLong(CONSTANT_Long_info info, P p); |
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344 R visitNameAndType(CONSTANT_NameAndType_info info, P p); |
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345 R visitMethodref(CONSTANT_Methodref_info info, P p); |
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346 R visitMethodHandle(CONSTANT_MethodHandle_info info, P p); |
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347 R visitMethodType(CONSTANT_MethodType_info info, P p); |
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348 R visitString(CONSTANT_String_info info, P p); |
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349 R visitUtf8(CONSTANT_Utf8_info info, P p); |
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350 } |
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351 |
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352 public static abstract class CPInfo { |
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353 CPInfo() { |
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354 this.cp = null; |
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355 } |
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356 |
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357 CPInfo(ConstantPool cp) { |
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358 this.cp = cp; |
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359 } |
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360 |
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361 public abstract int getTag(); |
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362 |
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363 /** The number of slots in the constant pool used by this entry. |
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364 * 2 for CONSTANT_Double and CONSTANT_Long; 1 for everything else. */ |
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365 public int size() { |
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366 return 1; |
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367 } |
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368 |
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369 public abstract int byteLength(); |
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370 |
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371 public abstract <R,D> R accept(Visitor<R,D> visitor, D data); |
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372 |
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373 protected final ConstantPool cp; |
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374 } |
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375 |
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376 public static abstract class CPRefInfo extends CPInfo { |
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377 protected CPRefInfo(ConstantPool cp, ClassReader cr, int tag) throws IOException { |
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378 super(cp); |
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379 this.tag = tag; |
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380 class_index = cr.readUnsignedShort(); |
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381 name_and_type_index = cr.readUnsignedShort(); |
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382 } |
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383 |
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384 protected CPRefInfo(ConstantPool cp, int tag, int class_index, int name_and_type_index) { |
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385 super(cp); |
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386 this.tag = tag; |
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387 this.class_index = class_index; |
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388 this.name_and_type_index = name_and_type_index; |
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389 } |
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390 |
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391 public int getTag() { |
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392 return tag; |
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393 } |
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394 |
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395 public int byteLength() { |
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396 return 5; |
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397 } |
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398 |
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399 public CONSTANT_Class_info getClassInfo() throws ConstantPoolException { |
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400 return cp.getClassInfo(class_index); |
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401 } |
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402 |
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403 public String getClassName() throws ConstantPoolException { |
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404 return cp.getClassInfo(class_index).getName(); |
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405 } |
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406 |
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407 public CONSTANT_NameAndType_info getNameAndTypeInfo() throws ConstantPoolException { |
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408 return cp.getNameAndTypeInfo(name_and_type_index); |
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409 } |
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410 |
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411 public final int tag; |
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412 public final int class_index; |
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413 public final int name_and_type_index; |
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414 } |
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415 |
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416 public static class CONSTANT_Class_info extends CPInfo { |
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417 CONSTANT_Class_info(ConstantPool cp, ClassReader cr) throws IOException { |
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418 super(cp); |
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419 name_index = cr.readUnsignedShort(); |
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420 } |
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421 |
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422 public CONSTANT_Class_info(ConstantPool cp, int name_index) { |
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423 super(cp); |
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424 this.name_index = name_index; |
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425 } |
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426 |
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427 public int getTag() { |
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428 return CONSTANT_Class; |
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429 } |
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430 |
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431 public int byteLength() { |
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432 return 3; |
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433 } |
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434 |
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435 /** |
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436 * Get the raw value of the class referenced by this constant pool entry. |
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437 * This will either be the name of the class, in internal form, or a |
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438 * descriptor for an array class. |
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439 * @return the raw value of the class |
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440 */ |
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441 public String getName() throws ConstantPoolException { |
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442 return cp.getUTF8Value(name_index); |
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443 } |
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444 |
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445 /** |
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446 * If this constant pool entry identifies either a class or interface type, |
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447 * or a possibly multi-dimensional array of a class of interface type, |
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448 * return the name of the class or interface in internal form. Otherwise, |
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449 * (i.e. if this is a possibly multi-dimensional array of a primitive type), |
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450 * return null. |
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451 * @return the base class or interface name |
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452 */ |
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453 public String getBaseName() throws ConstantPoolException { |
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454 String name = getName(); |
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455 if (name.startsWith("[")) { |
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456 int index = name.indexOf("[L"); |
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457 if (index == -1) |
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458 return null; |
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459 return name.substring(index + 2, name.length() - 1); |
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460 } else |
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461 return name; |
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462 } |
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463 |
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464 public int getDimensionCount() throws ConstantPoolException { |
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465 String name = getName(); |
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466 int count = 0; |
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467 while (name.charAt(count) == '[') |
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468 count++; |
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469 return count; |
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470 } |
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471 |
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472 @Override |
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473 public String toString() { |
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474 return "CONSTANT_Class_info[name_index: " + name_index + "]"; |
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475 } |
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476 |
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477 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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478 return visitor.visitClass(this, data); |
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479 } |
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480 |
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481 public final int name_index; |
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482 } |
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483 |
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484 public static class CONSTANT_Double_info extends CPInfo { |
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485 CONSTANT_Double_info(ClassReader cr) throws IOException { |
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486 value = cr.readDouble(); |
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487 } |
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488 |
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489 public CONSTANT_Double_info(double value) { |
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490 this.value = value; |
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491 } |
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492 |
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493 public int getTag() { |
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494 return CONSTANT_Double; |
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495 } |
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496 |
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497 public int byteLength() { |
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498 return 9; |
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499 } |
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500 |
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501 @Override |
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502 public int size() { |
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503 return 2; |
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504 } |
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505 |
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506 @Override |
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507 public String toString() { |
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508 return "CONSTANT_Double_info[value: " + value + "]"; |
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509 } |
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510 |
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511 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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512 return visitor.visitDouble(this, data); |
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513 } |
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514 |
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515 public final double value; |
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516 } |
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517 |
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518 public static class CONSTANT_Fieldref_info extends CPRefInfo { |
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519 CONSTANT_Fieldref_info(ConstantPool cp, ClassReader cr) throws IOException { |
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520 super(cp, cr, CONSTANT_Fieldref); |
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521 } |
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522 |
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523 public CONSTANT_Fieldref_info(ConstantPool cp, int class_index, int name_and_type_index) { |
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524 super(cp, CONSTANT_Fieldref, class_index, name_and_type_index); |
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525 } |
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526 |
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527 @Override |
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528 public String toString() { |
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529 return "CONSTANT_Fieldref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]"; |
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530 } |
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531 |
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532 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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533 return visitor.visitFieldref(this, data); |
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534 } |
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535 } |
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536 |
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537 public static class CONSTANT_Float_info extends CPInfo { |
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538 CONSTANT_Float_info(ClassReader cr) throws IOException { |
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539 value = cr.readFloat(); |
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540 } |
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541 |
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542 public CONSTANT_Float_info(float value) { |
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543 this.value = value; |
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544 } |
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545 |
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546 public int getTag() { |
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547 return CONSTANT_Float; |
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548 } |
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549 |
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550 public int byteLength() { |
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551 return 5; |
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552 } |
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553 |
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554 @Override |
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555 public String toString() { |
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556 return "CONSTANT_Float_info[value: " + value + "]"; |
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557 } |
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558 |
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559 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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560 return visitor.visitFloat(this, data); |
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561 } |
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562 |
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563 public final float value; |
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564 } |
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565 |
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566 public static class CONSTANT_Integer_info extends CPInfo { |
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567 CONSTANT_Integer_info(ClassReader cr) throws IOException { |
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568 value = cr.readInt(); |
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569 } |
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570 |
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571 public CONSTANT_Integer_info(int value) { |
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572 this.value = value; |
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573 } |
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574 |
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575 public int getTag() { |
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576 return CONSTANT_Integer; |
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577 } |
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578 |
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579 public int byteLength() { |
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580 return 5; |
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581 } |
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582 |
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583 @Override |
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584 public String toString() { |
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585 return "CONSTANT_Integer_info[value: " + value + "]"; |
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586 } |
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587 |
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588 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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589 return visitor.visitInteger(this, data); |
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590 } |
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591 |
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592 public final int value; |
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593 } |
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594 |
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595 public static class CONSTANT_InterfaceMethodref_info extends CPRefInfo { |
|
596 CONSTANT_InterfaceMethodref_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
597 super(cp, cr, CONSTANT_InterfaceMethodref); |
|
598 } |
|
599 |
|
600 public CONSTANT_InterfaceMethodref_info(ConstantPool cp, int class_index, int name_and_type_index) { |
|
601 super(cp, CONSTANT_InterfaceMethodref, class_index, name_and_type_index); |
|
602 } |
|
603 |
|
604 @Override |
|
605 public String toString() { |
|
606 return "CONSTANT_InterfaceMethodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]"; |
|
607 } |
|
608 |
|
609 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
610 return visitor.visitInterfaceMethodref(this, data); |
|
611 } |
|
612 } |
|
613 |
|
614 public static class CONSTANT_InvokeDynamic_info extends CPInfo { |
|
615 CONSTANT_InvokeDynamic_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
616 super(cp); |
|
617 bootstrap_method_attr_index = cr.readUnsignedShort(); |
|
618 name_and_type_index = cr.readUnsignedShort(); |
|
619 } |
|
620 |
|
621 public CONSTANT_InvokeDynamic_info(ConstantPool cp, int bootstrap_method_index, int name_and_type_index) { |
|
622 super(cp); |
|
623 this.bootstrap_method_attr_index = bootstrap_method_index; |
|
624 this.name_and_type_index = name_and_type_index; |
|
625 } |
|
626 |
|
627 public int getTag() { |
|
628 return CONSTANT_InvokeDynamic; |
|
629 } |
|
630 |
|
631 public int byteLength() { |
|
632 return 5; |
|
633 } |
|
634 |
|
635 @Override |
|
636 public String toString() { |
|
637 return "CONSTANT_InvokeDynamic_info[bootstrap_method_index: " + bootstrap_method_attr_index + ", name_and_type_index: " + name_and_type_index + "]"; |
|
638 } |
|
639 |
|
640 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
641 return visitor.visitInvokeDynamic(this, data); |
|
642 } |
|
643 |
|
644 public CONSTANT_NameAndType_info getNameAndTypeInfo() throws ConstantPoolException { |
|
645 return cp.getNameAndTypeInfo(name_and_type_index); |
|
646 } |
|
647 |
|
648 public final int bootstrap_method_attr_index; |
|
649 public final int name_and_type_index; |
|
650 } |
|
651 |
|
652 public static class CONSTANT_Long_info extends CPInfo { |
|
653 CONSTANT_Long_info(ClassReader cr) throws IOException { |
|
654 value = cr.readLong(); |
|
655 } |
|
656 |
|
657 public CONSTANT_Long_info(long value) { |
|
658 this.value = value; |
|
659 } |
|
660 |
|
661 public int getTag() { |
|
662 return CONSTANT_Long; |
|
663 } |
|
664 |
|
665 @Override |
|
666 public int size() { |
|
667 return 2; |
|
668 } |
|
669 |
|
670 public int byteLength() { |
|
671 return 9; |
|
672 } |
|
673 |
|
674 @Override |
|
675 public String toString() { |
|
676 return "CONSTANT_Long_info[value: " + value + "]"; |
|
677 } |
|
678 |
|
679 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
680 return visitor.visitLong(this, data); |
|
681 } |
|
682 |
|
683 public final long value; |
|
684 } |
|
685 |
|
686 public static class CONSTANT_MethodHandle_info extends CPInfo { |
|
687 CONSTANT_MethodHandle_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
688 super(cp); |
|
689 reference_kind = RefKind.getRefkind(cr.readUnsignedByte()); |
|
690 reference_index = cr.readUnsignedShort(); |
|
691 } |
|
692 |
|
693 public CONSTANT_MethodHandle_info(ConstantPool cp, RefKind ref_kind, int member_index) { |
|
694 super(cp); |
|
695 this.reference_kind = ref_kind; |
|
696 this.reference_index = member_index; |
|
697 } |
|
698 |
|
699 public int getTag() { |
|
700 return CONSTANT_MethodHandle; |
|
701 } |
|
702 |
|
703 public int byteLength() { |
|
704 return 4; |
|
705 } |
|
706 |
|
707 @Override |
|
708 public String toString() { |
|
709 return "CONSTANT_MethodHandle_info[ref_kind: " + reference_kind + ", member_index: " + reference_index + "]"; |
|
710 } |
|
711 |
|
712 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
713 return visitor.visitMethodHandle(this, data); |
|
714 } |
|
715 |
|
716 public CPRefInfo getCPRefInfo() throws ConstantPoolException { |
|
717 int expected = CONSTANT_Methodref; |
|
718 int actual = cp.get(reference_index).getTag(); |
|
719 // allow these tag types also: |
|
720 switch (actual) { |
|
721 case CONSTANT_Fieldref: |
|
722 case CONSTANT_InterfaceMethodref: |
|
723 expected = actual; |
|
724 } |
|
725 return (CPRefInfo) cp.get(reference_index, expected); |
|
726 } |
|
727 |
|
728 public final RefKind reference_kind; |
|
729 public final int reference_index; |
|
730 } |
|
731 |
|
732 public static class CONSTANT_MethodType_info extends CPInfo { |
|
733 CONSTANT_MethodType_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
734 super(cp); |
|
735 descriptor_index = cr.readUnsignedShort(); |
|
736 } |
|
737 |
|
738 public CONSTANT_MethodType_info(ConstantPool cp, int signature_index) { |
|
739 super(cp); |
|
740 this.descriptor_index = signature_index; |
|
741 } |
|
742 |
|
743 public int getTag() { |
|
744 return CONSTANT_MethodType; |
|
745 } |
|
746 |
|
747 public int byteLength() { |
|
748 return 3; |
|
749 } |
|
750 |
|
751 @Override |
|
752 public String toString() { |
|
753 return "CONSTANT_MethodType_info[signature_index: " + descriptor_index + "]"; |
|
754 } |
|
755 |
|
756 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
757 return visitor.visitMethodType(this, data); |
|
758 } |
|
759 |
|
760 public String getType() throws ConstantPoolException { |
|
761 return cp.getUTF8Value(descriptor_index); |
|
762 } |
|
763 |
|
764 public final int descriptor_index; |
|
765 } |
|
766 |
|
767 public static class CONSTANT_Methodref_info extends CPRefInfo { |
|
768 CONSTANT_Methodref_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
769 super(cp, cr, CONSTANT_Methodref); |
|
770 } |
|
771 |
|
772 public CONSTANT_Methodref_info(ConstantPool cp, int class_index, int name_and_type_index) { |
|
773 super(cp, CONSTANT_Methodref, class_index, name_and_type_index); |
|
774 } |
|
775 |
|
776 @Override |
|
777 public String toString() { |
|
778 return "CONSTANT_Methodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]"; |
|
779 } |
|
780 |
|
781 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
782 return visitor.visitMethodref(this, data); |
|
783 } |
|
784 } |
|
785 |
|
786 public static class CONSTANT_NameAndType_info extends CPInfo { |
|
787 CONSTANT_NameAndType_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
788 super(cp); |
|
789 name_index = cr.readUnsignedShort(); |
|
790 type_index = cr.readUnsignedShort(); |
|
791 } |
|
792 |
|
793 public CONSTANT_NameAndType_info(ConstantPool cp, int name_index, int type_index) { |
|
794 super(cp); |
|
795 this.name_index = name_index; |
|
796 this.type_index = type_index; |
|
797 } |
|
798 |
|
799 public int getTag() { |
|
800 return CONSTANT_NameAndType; |
|
801 } |
|
802 |
|
803 public int byteLength() { |
|
804 return 5; |
|
805 } |
|
806 |
|
807 public String getName() throws ConstantPoolException { |
|
808 return cp.getUTF8Value(name_index); |
|
809 } |
|
810 |
|
811 public String getType() throws ConstantPoolException { |
|
812 return cp.getUTF8Value(type_index); |
|
813 } |
|
814 |
|
815 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
816 return visitor.visitNameAndType(this, data); |
|
817 } |
|
818 |
|
819 @Override |
|
820 public String toString() { |
|
821 return "CONSTANT_NameAndType_info[name_index: " + name_index + ", type_index: " + type_index + "]"; |
|
822 } |
|
823 |
|
824 public final int name_index; |
|
825 public final int type_index; |
|
826 } |
|
827 |
|
828 public static class CONSTANT_String_info extends CPInfo { |
|
829 CONSTANT_String_info(ConstantPool cp, ClassReader cr) throws IOException { |
|
830 super(cp); |
|
831 string_index = cr.readUnsignedShort(); |
|
832 } |
|
833 |
|
834 public CONSTANT_String_info(ConstantPool cp, int string_index) { |
|
835 super(cp); |
|
836 this.string_index = string_index; |
|
837 } |
|
838 |
|
839 public int getTag() { |
|
840 return CONSTANT_String; |
|
841 } |
|
842 |
|
843 public int byteLength() { |
|
844 return 3; |
|
845 } |
|
846 |
|
847 public String getString() throws ConstantPoolException { |
|
848 return cp.getUTF8Value(string_index); |
|
849 } |
|
850 |
|
851 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
852 return visitor.visitString(this, data); |
|
853 } |
|
854 |
|
855 @Override |
|
856 public String toString() { |
|
857 return "CONSTANT_String_info[class_index: " + string_index + "]"; |
|
858 } |
|
859 |
|
860 public final int string_index; |
|
861 } |
|
862 |
|
863 public static class CONSTANT_Utf8_info extends CPInfo { |
|
864 CONSTANT_Utf8_info(ClassReader cr) throws IOException { |
|
865 value = cr.readUTF(); |
|
866 } |
|
867 |
|
868 public CONSTANT_Utf8_info(String value) { |
|
869 this.value = value; |
|
870 } |
|
871 |
|
872 public int getTag() { |
|
873 return CONSTANT_Utf8; |
|
874 } |
|
875 |
|
876 public int byteLength() { |
|
877 class SizeOutputStream extends OutputStream { |
|
878 @Override |
|
879 public void write(int b) { |
|
880 size++; |
|
881 } |
|
882 int size; |
|
883 } |
|
884 SizeOutputStream sizeOut = new SizeOutputStream(); |
|
885 DataOutputStream out = new DataOutputStream(sizeOut); |
|
886 try { out.writeUTF(value); } catch (IOException ignore) { } |
|
887 return 1 + sizeOut.size; |
|
888 } |
|
889 |
|
890 @Override |
|
891 public String toString() { |
|
892 if (value.length() < 32 && isPrintableAscii(value)) |
|
893 return "CONSTANT_Utf8_info[value: \"" + value + "\"]"; |
|
894 else |
|
895 return "CONSTANT_Utf8_info[value: (" + value.length() + " chars)]"; |
|
896 } |
|
897 |
|
898 static boolean isPrintableAscii(String s) { |
|
899 for (int i = 0; i < s.length(); i++) { |
|
900 char c = s.charAt(i); |
|
901 if (c < 32 || c >= 127) |
|
902 return false; |
|
903 } |
|
904 return true; |
|
905 } |
|
906 |
|
907 public <R, D> R accept(Visitor<R, D> visitor, D data) { |
|
908 return visitor.visitUtf8(this, data); |
|
909 } |
|
910 |
|
911 public final String value; |
|
912 } |
|
913 |
|
914 } |
|