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25 package org.apidesign.javap;
27 import java.io.ByteArrayInputStream;
28 import java.io.DataInputStream;
29 import java.io.IOException;
31 /** An abstract parser for annotation definitions. Analyses the bytes and
32 * performs some callbacks to the overriden parser methods.
34 * @author Jaroslav Tulach <jtulach@netbeans.org>
36 public class AnnotationParser {
37 private final boolean textual;
38 private final boolean iterateArray;
40 protected AnnotationParser(boolean textual, boolean iterateArray) {
41 this.textual = textual;
42 this.iterateArray = iterateArray;
45 protected void visitAnnotationStart(String type) throws IOException {
48 protected void visitAnnotationEnd(String type) throws IOException {
51 protected void visitValueStart(String attrName, char type) throws IOException {
54 protected void visitValueEnd(String attrName, char type) throws IOException {
58 protected void visitAttr(
59 String annoType, String attr, String attrType, String value
60 ) throws IOException {
63 /** Initialize the parsing with constant pool from <code>cd</code>.
65 * @param attr the attribute defining annotations
66 * @param cd constant pool
67 * @throws IOException in case I/O fails
69 public final void parse(byte[] attr, ClassData cd) throws IOException {
70 ByteArrayInputStream is = new ByteArrayInputStream(attr);
71 DataInputStream dis = new DataInputStream(is);
79 private void read(DataInputStream dis, ClassData cd) throws IOException {
80 int cnt = dis.readUnsignedShort();
81 for (int i = 0; i < cnt; i++) {
86 private void readAnno(DataInputStream dis, ClassData cd) throws IOException {
87 int type = dis.readUnsignedShort();
88 String typeName = cd.StringValue(type);
89 visitAnnotationStart(typeName);
90 int cnt = dis.readUnsignedShort();
91 for (int i = 0; i < cnt; i++) {
92 String attrName = cd.StringValue(dis.readUnsignedShort());
93 readValue(dis, cd, typeName, attrName);
95 visitAnnotationEnd(typeName);
97 visitAttr(typeName, null, null, null);
101 private void readValue(
102 DataInputStream dis, ClassData cd, String typeName, String attrName
103 ) throws IOException {
104 char type = (char)dis.readByte();
105 visitValueStart(attrName, type);
108 } else if ("CFJZsSIDB".indexOf(type) >= 0) { // NOI18N
109 int primitive = dis.readUnsignedShort();
110 String val = cd.stringValue(primitive, textual);
113 attrType = "Ljava_lang_String_2";
115 val = '"' + val + '"';
118 attrType = "" + type;
120 visitAttr(typeName, attrName, attrType, val);
121 } else if (type == 'c') {
122 int cls = dis.readUnsignedShort();
123 } else if (type == '[') {
124 int cnt = dis.readUnsignedShort();
125 for (int i = 0; i < cnt; i++) {
126 readValue(dis, cd, typeName, iterateArray ? attrName : null);
128 } else if (type == 'e') {
129 int enumT = dis.readUnsignedShort();
130 String attrType = cd.stringValue(enumT, textual);
131 int enumN = dis.readUnsignedShort();
132 String val = cd.stringValue(enumN, textual);
134 val = "vm." + attrType.substring(1, attrType.length() - 1).replace('/', '_') + "(false).constructor." + val;
136 visitAttr(typeName, attrName, attrType, val);
138 throw new IOException("Unknown type " + type);
140 visitValueEnd(attrName, type);