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