1 /* |
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2 * Copyright (c) 2002, 2014, 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.javah; |
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27 |
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28 import java.util.*; |
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29 import javax.lang.model.element.Name; |
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30 import javax.lang.model.element.TypeElement; |
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31 import javax.lang.model.type.ArrayType; |
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32 import javax.lang.model.type.DeclaredType; |
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33 import javax.lang.model.type.NoType; |
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34 import javax.lang.model.type.PrimitiveType; |
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35 import javax.lang.model.type.TypeKind; |
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36 import javax.lang.model.type.TypeMirror; |
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37 import javax.lang.model.type.TypeVariable; |
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38 import javax.lang.model.type.TypeVisitor; |
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39 import javax.lang.model.util.Elements; |
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40 import javax.lang.model.util.SimpleTypeVisitor9; |
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41 |
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42 import com.sun.tools.javac.util.DefinedBy; |
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43 import com.sun.tools.javac.util.DefinedBy.Api; |
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44 |
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45 /** |
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46 * Returns internal type signature. |
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47 * |
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48 * <p><b>This is NOT part of any supported API. |
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49 * If you write code that depends on this, you do so at your own |
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50 * risk. This code and its internal interfaces are subject to change |
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51 * or deletion without notice.</b></p> |
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52 * |
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53 * @author Sucheta Dambalkar |
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54 */ |
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55 |
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56 public class TypeSignature { |
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57 static class SignatureException extends Exception { |
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58 private static final long serialVersionUID = 1L; |
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59 SignatureException(String reason) { |
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60 super(reason); |
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61 } |
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62 } |
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63 |
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64 Elements elems; |
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65 |
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66 /* Signature Characters */ |
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67 |
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68 private static final String SIG_VOID = "V"; |
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69 private static final String SIG_BOOLEAN = "Z"; |
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70 private static final String SIG_BYTE = "B"; |
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71 private static final String SIG_CHAR = "C"; |
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72 private static final String SIG_SHORT = "S"; |
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73 private static final String SIG_INT = "I"; |
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74 private static final String SIG_LONG = "J"; |
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75 private static final String SIG_FLOAT = "F"; |
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76 private static final String SIG_DOUBLE = "D"; |
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77 private static final String SIG_ARRAY = "["; |
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78 private static final String SIG_CLASS = "L"; |
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79 |
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80 |
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81 |
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82 public TypeSignature(Elements elems){ |
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83 this.elems = elems; |
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84 } |
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85 |
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86 /* |
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87 * Returns the type signature of a field according to JVM specs |
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88 */ |
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89 public String getTypeSignature(String javasignature) throws SignatureException { |
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90 return getParamJVMSignature(javasignature); |
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91 } |
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92 |
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93 /* |
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94 * Returns the type signature of a method according to JVM specs |
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95 */ |
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96 public String getTypeSignature(String javasignature, TypeMirror returnType) |
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97 throws SignatureException { |
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98 String signature = null; //Java type signature. |
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99 String typeSignature = null; //Internal type signature. |
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100 List<String> params = new ArrayList<>(); //List of parameters. |
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101 String paramsig = null; //Java parameter signature. |
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102 String paramJVMSig = null; //Internal parameter signature. |
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103 String returnSig = null; //Java return type signature. |
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104 String returnJVMType = null; //Internal return type signature. |
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105 int dimensions = 0; //Array dimension. |
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106 |
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107 int startIndex = -1; |
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108 int endIndex = -1; |
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109 StringTokenizer st = null; |
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110 int i = 0; |
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111 |
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112 // Gets the actual java signature without parentheses. |
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113 if (javasignature != null) { |
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114 startIndex = javasignature.indexOf("("); |
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115 endIndex = javasignature.indexOf(")"); |
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116 } |
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117 |
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118 if (((startIndex != -1) && (endIndex != -1)) |
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119 &&(startIndex+1 < javasignature.length()) |
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120 &&(endIndex < javasignature.length())) { |
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121 signature = javasignature.substring(startIndex+1, endIndex); |
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122 } |
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123 |
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124 // Separates parameters. |
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125 if (signature != null) { |
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126 if (signature.contains(",")) { |
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127 st = new StringTokenizer(signature, ","); |
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128 if (st != null) { |
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129 while (st.hasMoreTokens()) { |
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130 params.add(st.nextToken()); |
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131 } |
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132 } |
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133 } else { |
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134 params.add(signature); |
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135 } |
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136 } |
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137 |
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138 /* JVM type signature. */ |
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139 typeSignature = "("; |
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140 |
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141 // Gets indivisual internal parameter signature. |
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142 while (params.isEmpty() != true) { |
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143 paramsig = params.remove(i).trim(); |
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144 paramJVMSig = getParamJVMSignature(paramsig); |
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145 if (paramJVMSig != null) { |
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146 typeSignature += paramJVMSig; |
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147 } |
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148 } |
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149 |
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150 typeSignature += ")"; |
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151 |
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152 // Get internal return type signature. |
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153 |
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154 returnJVMType = ""; |
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155 if (returnType != null) { |
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156 dimensions = dimensions(returnType); |
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157 } |
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158 |
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159 //Gets array dimension of return type. |
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160 while (dimensions-- > 0) { |
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161 returnJVMType += "["; |
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162 } |
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163 if (returnType != null) { |
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164 returnSig = qualifiedTypeName(returnType); |
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165 returnJVMType += getComponentType(returnSig); |
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166 } else { |
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167 System.out.println("Invalid return type."); |
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168 } |
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169 |
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170 typeSignature += returnJVMType; |
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171 |
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172 return typeSignature; |
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173 } |
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174 |
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175 /* |
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176 * Returns internal signature of a parameter. |
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177 */ |
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178 private String getParamJVMSignature(String paramsig) throws SignatureException { |
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179 String paramJVMSig = ""; |
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180 String componentType =""; |
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181 |
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182 if(paramsig != null){ |
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183 |
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184 if(paramsig.contains("[]")) { |
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185 // Gets array dimension. |
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186 int endindex = paramsig.indexOf("[]"); |
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187 componentType = paramsig.substring(0, endindex); |
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188 String dimensionString = paramsig.substring(endindex); |
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189 if(dimensionString != null){ |
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190 while(dimensionString.contains("[]")){ |
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191 paramJVMSig += "["; |
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192 int beginindex = dimensionString.indexOf("]") + 1; |
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193 if(beginindex < dimensionString.length()){ |
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194 dimensionString = dimensionString.substring(beginindex); |
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195 }else |
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196 dimensionString = ""; |
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197 } |
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198 } |
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199 } else componentType = paramsig; |
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200 |
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201 paramJVMSig += getComponentType(componentType); |
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202 } |
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203 return paramJVMSig; |
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204 } |
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205 |
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206 /* |
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207 * Returns internal signature of a component. |
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208 */ |
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209 private String getComponentType(String componentType) throws SignatureException { |
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210 |
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211 String JVMSig = ""; |
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212 |
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213 if(componentType != null){ |
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214 switch (componentType) { |
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215 case "void": JVMSig += SIG_VOID; break; |
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216 case "boolean": JVMSig += SIG_BOOLEAN; break; |
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217 case "byte": JVMSig += SIG_BYTE; break; |
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218 case "char": JVMSig += SIG_CHAR; break; |
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219 case "short": JVMSig += SIG_SHORT; break; |
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220 case "int": JVMSig += SIG_INT; break; |
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221 case "long": JVMSig += SIG_LONG; break; |
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222 case "float": JVMSig += SIG_FLOAT; break; |
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223 case "double": JVMSig += SIG_DOUBLE; break; |
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224 default: |
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225 if (!componentType.equals("")) { |
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226 TypeElement classNameDoc = elems.getTypeElement(componentType); |
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227 |
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228 if (classNameDoc == null) { |
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229 throw new SignatureException(componentType); |
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230 } |
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231 else { |
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232 String classname = classNameDoc.getQualifiedName().toString(); |
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233 String newclassname = classname.replace('.', '/'); |
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234 JVMSig += "L"; |
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235 JVMSig += newclassname; |
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236 JVMSig += ";"; |
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237 } |
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238 } |
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239 break; |
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240 } |
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241 } |
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242 return JVMSig; |
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243 } |
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244 |
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245 int dimensions(TypeMirror t) { |
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246 if (t.getKind() != TypeKind.ARRAY) |
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247 return 0; |
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248 return 1 + dimensions(((ArrayType) t).getComponentType()); |
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249 } |
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250 |
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251 |
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252 String qualifiedTypeName(TypeMirror type) { |
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253 TypeVisitor<Name, Void> v = new SimpleTypeVisitor9<Name, Void>() { |
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254 @Override @DefinedBy(Api.LANGUAGE_MODEL) |
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255 public Name visitArray(ArrayType t, Void p) { |
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256 return t.getComponentType().accept(this, p); |
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257 } |
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258 |
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259 @Override @DefinedBy(Api.LANGUAGE_MODEL) |
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260 public Name visitDeclared(DeclaredType t, Void p) { |
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261 return ((TypeElement) t.asElement()).getQualifiedName(); |
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262 } |
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263 |
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264 @Override @DefinedBy(Api.LANGUAGE_MODEL) |
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265 public Name visitPrimitive(PrimitiveType t, Void p) { |
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266 return elems.getName(t.toString()); |
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267 } |
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268 |
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269 @Override @DefinedBy(Api.LANGUAGE_MODEL) |
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270 public Name visitNoType(NoType t, Void p) { |
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271 if (t.getKind() == TypeKind.VOID) |
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272 return elems.getName("void"); |
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273 return defaultAction(t, p); |
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274 } |
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275 |
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276 @Override @DefinedBy(Api.LANGUAGE_MODEL) |
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277 public Name visitTypeVariable(TypeVariable t, Void p) { |
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278 return t.getUpperBound().accept(this, p); |
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279 } |
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280 }; |
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281 return v.visit(type).toString(); |
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282 } |
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283 } |
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