Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/javadoc/AnnotationValueImpl.java

src/share/classes/com/sun/tools/javadoc/AnnotationValueImpl.java

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1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javadoc;
27
28 import com.sun.javadoc.*;
29
30 import com.sun.tools.javac.code.Attribute;
31
32 import static com.sun.tools.javac.code.TypeTag.BOOLEAN;
33
34 /**
35 * Represents a value of an annotation type element.
36 *
37 * <p><b>This is NOT part of any supported API.
38 * If you write code that depends on this, you do so at your own risk.
39 * This code and its internal interfaces are subject to change or
40 * deletion without notice.</b>
41 *
42 * @author Scott Seligman
43 * @since 1.5
44 */
45
46 public class AnnotationValueImpl implements AnnotationValue {
47
48 private final DocEnv env;
49 private final Attribute attr;
50
51
52 AnnotationValueImpl(DocEnv env, Attribute attr) {
53 this.env = env;
54 this.attr = attr;
55 }
56
57 /**
58 * Returns the value.
59 * The type of the returned object is one of the following:
60 * <ul><li> a wrapper class for a primitive type
61 * <li> <code>String</code>
62 * <li> <code>Type</code> (representing a class literal)
63 * <li> <code>FieldDoc</code> (representing an enum constant)
64 * <li> <code>AnnotationDesc</code>
65 * <li> <code>AnnotationValue[]</code>
66 * </ul>
67 */
68 public Object value() {
69 ValueVisitor vv = new ValueVisitor();
70 attr.accept(vv);
71 return vv.value;
72 }
73
74 private class ValueVisitor implements Attribute.Visitor {
75 public Object value;
76
77 public void visitConstant(Attribute.Constant c) {
78 if (c.type.hasTag(BOOLEAN)) {
79 // javac represents false and true as integers 0 and 1
80 value = Boolean.valueOf(
81 ((Integer)c.value).intValue() != 0);
82 } else {
83 value = c.value;
84 }
85 }
86
87 public void visitClass(Attribute.Class c) {
88 value = TypeMaker.getType(env,
89 env.types.erasure(c.classType));
90 }
91
92 public void visitEnum(Attribute.Enum e) {
93 value = env.getFieldDoc(e.value);
94 }
95
96 public void visitCompound(Attribute.Compound c) {
97 value = new AnnotationDescImpl(env, c);
98 }
99
100 public void visitArray(Attribute.Array a) {
101 AnnotationValue vals[] = new AnnotationValue[a.values.length];
102 for (int i = 0; i < vals.length; i++) {
103 vals[i] = new AnnotationValueImpl(env, a.values[i]);
104 }
105 value = vals;
106 }
107
108 public void visitError(Attribute.Error e) {
109 value = "<error>";
110 }
111 }
112
113 /**
114 * Returns a string representation of the value.
115 *
116 * @return the text of a Java language annotation value expression
117 * whose value is the value of this annotation type element.
118 */
119 @Override
120 public String toString() {
121 ToStringVisitor tv = new ToStringVisitor();
122 attr.accept(tv);
123 return tv.toString();
124 }
125
126 private class ToStringVisitor implements Attribute.Visitor {
127 private final StringBuilder sb = new StringBuilder();
128
129 @Override
130 public String toString() {
131 return sb.toString();
132 }
133
134 public void visitConstant(Attribute.Constant c) {
135 if (c.type.hasTag(BOOLEAN)) {
136 // javac represents false and true as integers 0 and 1
137 sb.append(((Integer)c.value).intValue() != 0);
138 } else {
139 sb.append(FieldDocImpl.constantValueExpression(c.value));
140 }
141 }
142
143 public void visitClass(Attribute.Class c) {
144 sb.append(c);
145 }
146
147 public void visitEnum(Attribute.Enum e) {
148 sb.append(e);
149 }
150
151 public void visitCompound(Attribute.Compound c) {
152 sb.append(new AnnotationDescImpl(env, c));
153 }
154
155 public void visitArray(Attribute.Array a) {
156 // Omit braces from singleton.
157 if (a.values.length != 1) sb.append('{');
158
159 boolean first = true;
160 for (Attribute elem : a.values) {
161 if (first) {
162 first = false;
163 } else {
164 sb.append(", ");
165 }
166 elem.accept(this);
167 }
168 // Omit braces from singleton.
169 if (a.values.length != 1) sb.append('}');
170 }
171
172 public void visitError(Attribute.Error e) {
173 sb.append("<error>");
174 }
175 }
176 }

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