1 /*
2  * Copyright (C) 2009 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.mkstubs.sourcer;
18 
19 import com.android.mkstubs.Main;
20 
21 import org.objectweb.asm.AnnotationVisitor;
22 
23 /**
24  * An annotation visitor that generates Java source for an annotation.
25  */
26 class AnnotationSourcer extends AnnotationVisitor {
27 
28     private final String mOpenChar;
29     private final String mCloseChar;
30     private final Output mOutput;
31     private boolean mNeedClose;
32 
AnnotationSourcer(Output output)33     public AnnotationSourcer(Output output) {
34         this(output, false /*isArray*/);
35     }
36 
AnnotationSourcer(Output output, boolean isArray)37     public AnnotationSourcer(Output output, boolean isArray) {
38         super(Main.ASM_VERSION);
39         mOutput = output;
40         mOpenChar = isArray ? "[" : "(";
41         mCloseChar = isArray ? "]" : ")";
42     }
43 
44     @Override
visit(String name, Object value)45     public void visit(String name, Object value) {
46         startOpen();
47 
48         if (name != null) {
49             mOutput.write("%s=", name);
50         }
51         if (value != null) {
52             mOutput.write(name.toString());
53         }
54     }
55 
startOpen()56     private void startOpen() {
57         if (!mNeedClose) {
58             mNeedClose = true;
59             mOutput.write(mOpenChar);
60         }
61     }
62 
63     @Override
visitEnd()64     public void visitEnd() {
65         if (mNeedClose) {
66             mOutput.write(mCloseChar);
67         }
68         mOutput.write("\n");
69     }
70 
71     @Override
visitAnnotation(String name, String desc)72     public AnnotationVisitor visitAnnotation(String name, String desc) {
73         startOpen();
74 
75         mOutput.write("@%s", name);
76         return this;
77     }
78 
79     @Override
visitArray(String name)80     public AnnotationVisitor visitArray(String name) {
81         startOpen();
82         return new AnnotationSourcer(mOutput, true /*isArray*/);
83     }
84 
85     @Override
visitEnum(String name, String desc, String value)86     public void visitEnum(String name, String desc, String value) {
87         mOutput.write("/* annotation enum not supported: %s */\n", name);
88     }
89 
90 }
91