1 /* |
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2 * Copyright (c) 2003, 2013, 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.javadoc; |
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27 |
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28 import com.sun.javadoc.*; |
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29 |
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30 import com.sun.tools.javac.code.Attribute; |
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31 |
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32 import static com.sun.tools.javac.code.TypeTag.BOOLEAN; |
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33 |
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34 /** |
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35 * Represents a value of an annotation type element. |
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36 * |
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37 * <p><b>This is NOT part of any supported API. |
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38 * If you write code that depends on this, you do so at your own risk. |
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39 * This code and its internal interfaces are subject to change or |
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40 * deletion without notice.</b> |
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41 * |
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42 * @author Scott Seligman |
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43 * @since 1.5 |
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44 */ |
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45 |
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46 public class AnnotationValueImpl implements AnnotationValue { |
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47 |
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48 private final DocEnv env; |
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49 private final Attribute attr; |
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50 |
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51 |
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52 AnnotationValueImpl(DocEnv env, Attribute attr) { |
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53 this.env = env; |
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54 this.attr = attr; |
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55 } |
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56 |
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57 /** |
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58 * Returns the value. |
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59 * The type of the returned object is one of the following: |
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60 * <ul><li> a wrapper class for a primitive type |
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61 * <li> <code>String</code> |
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62 * <li> <code>Type</code> (representing a class literal) |
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63 * <li> <code>FieldDoc</code> (representing an enum constant) |
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64 * <li> <code>AnnotationDesc</code> |
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65 * <li> <code>AnnotationValue[]</code> |
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66 * </ul> |
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67 */ |
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68 public Object value() { |
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69 ValueVisitor vv = new ValueVisitor(); |
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70 attr.accept(vv); |
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71 return vv.value; |
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72 } |
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73 |
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74 private class ValueVisitor implements Attribute.Visitor { |
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75 public Object value; |
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76 |
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77 public void visitConstant(Attribute.Constant c) { |
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78 if (c.type.hasTag(BOOLEAN)) { |
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79 // javac represents false and true as integers 0 and 1 |
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80 value = Boolean.valueOf( |
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81 ((Integer)c.value).intValue() != 0); |
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82 } else { |
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83 value = c.value; |
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84 } |
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85 } |
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86 |
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87 public void visitClass(Attribute.Class c) { |
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88 value = TypeMaker.getType(env, |
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89 env.types.erasure(c.classType)); |
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90 } |
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91 |
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92 public void visitEnum(Attribute.Enum e) { |
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93 value = env.getFieldDoc(e.value); |
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94 } |
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95 |
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96 public void visitCompound(Attribute.Compound c) { |
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97 value = new AnnotationDescImpl(env, c); |
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98 } |
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99 |
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100 public void visitArray(Attribute.Array a) { |
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101 AnnotationValue vals[] = new AnnotationValue[a.values.length]; |
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102 for (int i = 0; i < vals.length; i++) { |
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103 vals[i] = new AnnotationValueImpl(env, a.values[i]); |
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104 } |
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105 value = vals; |
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106 } |
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107 |
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108 public void visitError(Attribute.Error e) { |
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109 value = "<error>"; |
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110 } |
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111 } |
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112 |
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113 /** |
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114 * Returns a string representation of the value. |
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115 * |
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116 * @return the text of a Java language annotation value expression |
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117 * whose value is the value of this annotation type element. |
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118 */ |
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119 @Override |
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120 public String toString() { |
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121 ToStringVisitor tv = new ToStringVisitor(); |
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122 attr.accept(tv); |
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123 return tv.toString(); |
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124 } |
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125 |
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126 private class ToStringVisitor implements Attribute.Visitor { |
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127 private final StringBuilder sb = new StringBuilder(); |
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128 |
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129 @Override |
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130 public String toString() { |
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131 return sb.toString(); |
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132 } |
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133 |
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134 public void visitConstant(Attribute.Constant c) { |
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135 if (c.type.hasTag(BOOLEAN)) { |
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136 // javac represents false and true as integers 0 and 1 |
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137 sb.append(((Integer)c.value).intValue() != 0); |
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138 } else { |
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139 sb.append(FieldDocImpl.constantValueExpression(c.value)); |
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140 } |
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141 } |
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142 |
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143 public void visitClass(Attribute.Class c) { |
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144 sb.append(c); |
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145 } |
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146 |
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147 public void visitEnum(Attribute.Enum e) { |
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148 sb.append(e); |
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149 } |
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150 |
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151 public void visitCompound(Attribute.Compound c) { |
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152 sb.append(new AnnotationDescImpl(env, c)); |
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153 } |
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154 |
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155 public void visitArray(Attribute.Array a) { |
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156 // Omit braces from singleton. |
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157 if (a.values.length != 1) sb.append('{'); |
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158 |
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159 boolean first = true; |
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160 for (Attribute elem : a.values) { |
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161 if (first) { |
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162 first = false; |
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163 } else { |
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164 sb.append(", "); |
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165 } |
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166 elem.accept(this); |
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167 } |
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168 // Omit braces from singleton. |
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169 if (a.values.length != 1) sb.append('}'); |
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170 } |
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171 |
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172 public void visitError(Attribute.Error e) { |
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173 sb.append("<error>"); |
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174 } |
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175 } |
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176 } |
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