jaroslav@152: /*
jaroslav@152:  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
jaroslav@152:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jaroslav@152:  *
jaroslav@152:  * This code is free software; you can redistribute it and/or modify it
jaroslav@152:  * under the terms of the GNU General Public License version 2 only, as
jaroslav@152:  * published by the Free Software Foundation.  Oracle designates this
jaroslav@152:  * particular file as subject to the "Classpath" exception as provided
jaroslav@152:  * by Oracle in the LICENSE file that accompanied this code.
jaroslav@152:  *
jaroslav@152:  * This code is distributed in the hope that it will be useful, but WITHOUT
jaroslav@152:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jaroslav@152:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jaroslav@152:  * version 2 for more details (a copy is included in the LICENSE file that
jaroslav@152:  * accompanied this code).
jaroslav@152:  *
jaroslav@152:  * You should have received a copy of the GNU General Public License version
jaroslav@152:  * 2 along with this work; if not, write to the Free Software Foundation,
jaroslav@152:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jaroslav@152:  *
jaroslav@152:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jaroslav@152:  * or visit www.oracle.com if you need additional information or have any
jaroslav@152:  * questions.
jaroslav@152:  */
jtulach@167: package org.apidesign.javap;
jaroslav@152: 
jaroslav@152: import java.io.ByteArrayInputStream;
jaroslav@152: import java.io.DataInputStream;
jaroslav@152: import java.io.IOException;
jaroslav@152: 
jaroslav@152: /** An abstract parser for annotation definitions. Analyses the bytes and
jaroslav@152:  * performs some callbacks to the overriden parser methods.
jaroslav@152:  *
jaroslav@152:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@152:  */
jaroslav@152: public class AnnotationParser {
jaroslav@237:     private final boolean textual;
jaroslav@237:     
jaroslav@237:     protected AnnotationParser(boolean textual) {
jaroslav@237:         this.textual = textual;
jaroslav@152:     }
jaroslav@152: 
jaroslav@235:     protected void visitAnnotationStart(String type) throws IOException {
jaroslav@235:     }
jaroslav@235: 
jaroslav@235:     protected void visitAnnotationEnd(String type) throws IOException {
jaroslav@235:     }
jaroslav@235:     
jaroslav@235:     protected void visitAttr(
jaroslav@236:         String annoType, String attr, String attrType, String value
jaroslav@235:     ) throws IOException {
jaroslav@152:     }
jaroslav@152:     
jaroslav@152:     /** Initialize the parsing with constant pool from <code>cd</code>.
jaroslav@152:      * 
jaroslav@152:      * @param attr the attribute defining annotations
jaroslav@152:      * @param cd constant pool
jaroslav@152:      * @throws IOException in case I/O fails
jaroslav@152:      */
jaroslav@152:     public final void parse(byte[] attr, ClassData cd) throws IOException {
jaroslav@152:         ByteArrayInputStream is = new ByteArrayInputStream(attr);
jaroslav@152:         DataInputStream dis = new DataInputStream(is);
jaroslav@152:         try {
jaroslav@152:             read(dis, cd);
jaroslav@152:         } finally {
jaroslav@152:             is.close();
jaroslav@152:         }
jaroslav@152:     }
jaroslav@152:     
jaroslav@152:     private void read(DataInputStream dis, ClassData cd) throws IOException {
jaroslav@152:     	int cnt = dis.readUnsignedShort();
jaroslav@152:         for (int i = 0; i < cnt; i++) {
jaroslav@152:             readAnno(dis, cd);
jaroslav@152:         }
jaroslav@152:     }
jaroslav@152: 
jaroslav@152:     private void readAnno(DataInputStream dis, ClassData cd) throws IOException {
jaroslav@152:         int type = dis.readUnsignedShort();
jaroslav@152:         String typeName = cd.StringValue(type);
jaroslav@235:         visitAnnotationStart(typeName);
jaroslav@152:     	int cnt = dis.readUnsignedShort();
jaroslav@152:     	for (int i = 0; i < cnt; i++) {
jaroslav@153:             String attrName = cd.StringValue(dis.readUnsignedShort());
jaroslav@153:             readValue(dis, cd, typeName, attrName);
jaroslav@152:         }
jaroslav@235:         visitAnnotationEnd(typeName);
jaroslav@240:         if (cnt == 0) {
jaroslav@249:             visitAttr(typeName, null, null, null);
jaroslav@240:         }
jaroslav@152:     }
jaroslav@152: 
jaroslav@153:     private void readValue(DataInputStream dis, ClassData cd, String typeName, String attrName) 
jaroslav@152:     throws IOException {
jaroslav@152:         char type = (char)dis.readByte();
jaroslav@152:         if (type == '@') {
jaroslav@152:             readAnno(dis, cd);
jaroslav@152:         } else if ("CFJZsSIDB".indexOf(type) >= 0) { // NOI18N
jaroslav@152:             int primitive = dis.readUnsignedShort();
jaroslav@237:             String val = cd.stringValue(primitive, textual);
jaroslav@236:             String attrType;
jaroslav@236:             if (type == 's') {
jaroslav@252:                 attrType = "Ljava_lang_String_2";
jaroslav@237:                 if (textual) {
jaroslav@237:                     val = '"' + val + '"';
jaroslav@237:                 }
jaroslav@236:             } else {
jaroslav@236:                 attrType = "" + type;
jaroslav@236:             }
jaroslav@237:             visitAttr(typeName, attrName, attrType, val);
jaroslav@152:         } else if (type == 'c') {
jaroslav@152:             int cls = dis.readUnsignedShort();
jaroslav@152:         } else if (type == '[') {
jaroslav@152:             int cnt = dis.readUnsignedShort();
jaroslav@152:             for (int i = 0; i < cnt; i++) {
jaroslav@153:                 readValue(dis, cd, typeName, attrName);
jaroslav@152:             }
jaroslav@152:         } else if (type == 'e') {
jaroslav@152:             int enumT = dis.readUnsignedShort();
jaroslav@152:             int enumN = dis.readUnsignedShort();
jaroslav@152:         } else {
jaroslav@152:             throw new IOException("Unknown type " + type);
jaroslav@152:         }
jaroslav@152:     }
jaroslav@152: }