1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/javap/src/main/java/org/apidesign/javap/AnnotationParser.java	Fri Nov 16 08:08:36 2012 +0100
     1.3 @@ -0,0 +1,98 @@
     1.4 +/*
     1.5 + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.  Oracle designates this
    1.11 + * particular file as subject to the "Classpath" exception as provided
    1.12 + * by Oracle in the LICENSE file that accompanied this code.
    1.13 + *
    1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.16 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.17 + * version 2 for more details (a copy is included in the LICENSE file that
    1.18 + * accompanied this code).
    1.19 + *
    1.20 + * You should have received a copy of the GNU General Public License version
    1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.23 + *
    1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.25 + * or visit www.oracle.com if you need additional information or have any
    1.26 + * questions.
    1.27 + */
    1.28 +package org.apidesign.javap;
    1.29 +
    1.30 +import java.io.ByteArrayInputStream;
    1.31 +import java.io.DataInputStream;
    1.32 +import java.io.IOException;
    1.33 +
    1.34 +/** An abstract parser for annotation definitions. Analyses the bytes and
    1.35 + * performs some callbacks to the overriden parser methods.
    1.36 + *
    1.37 + * @author Jaroslav Tulach <jtulach@netbeans.org>
    1.38 + */
    1.39 +public class AnnotationParser {
    1.40 +    protected AnnotationParser() {
    1.41 +    }
    1.42 +
    1.43 +    protected void visitAttr(String type, String attr, String value) {
    1.44 +    }
    1.45 +    
    1.46 +    /** Initialize the parsing with constant pool from <code>cd</code>.
    1.47 +     * 
    1.48 +     * @param attr the attribute defining annotations
    1.49 +     * @param cd constant pool
    1.50 +     * @throws IOException in case I/O fails
    1.51 +     */
    1.52 +    public final void parse(byte[] attr, ClassData cd) throws IOException {
    1.53 +        ByteArrayInputStream is = new ByteArrayInputStream(attr);
    1.54 +        DataInputStream dis = new DataInputStream(is);
    1.55 +        try {
    1.56 +            read(dis, cd);
    1.57 +        } finally {
    1.58 +            is.close();
    1.59 +        }
    1.60 +    }
    1.61 +    
    1.62 +    private void read(DataInputStream dis, ClassData cd) throws IOException {
    1.63 +    	int cnt = dis.readUnsignedShort();
    1.64 +        for (int i = 0; i < cnt; i++) {
    1.65 +            readAnno(dis, cd);
    1.66 +        }
    1.67 +    }
    1.68 +
    1.69 +    private void readAnno(DataInputStream dis, ClassData cd) throws IOException {
    1.70 +        int type = dis.readUnsignedShort();
    1.71 +        String typeName = cd.StringValue(type);
    1.72 +    	int cnt = dis.readUnsignedShort();
    1.73 +    	for (int i = 0; i < cnt; i++) {
    1.74 +            String attrName = cd.StringValue(dis.readUnsignedShort());
    1.75 +            readValue(dis, cd, typeName, attrName);
    1.76 +        }
    1.77 +    }
    1.78 +
    1.79 +    private void readValue(DataInputStream dis, ClassData cd, String typeName, String attrName) 
    1.80 +    throws IOException {
    1.81 +        char type = (char)dis.readByte();
    1.82 +        if (type == '@') {
    1.83 +            readAnno(dis, cd);
    1.84 +        } else if ("CFJZsSIDB".indexOf(type) >= 0) { // NOI18N
    1.85 +            int primitive = dis.readUnsignedShort();
    1.86 +            visitAttr(typeName, attrName, cd.StringValue(primitive));
    1.87 +        } else if (type == 'c') {
    1.88 +            int cls = dis.readUnsignedShort();
    1.89 +        } else if (type == '[') {
    1.90 +            int cnt = dis.readUnsignedShort();
    1.91 +            for (int i = 0; i < cnt; i++) {
    1.92 +                readValue(dis, cd, typeName, attrName);
    1.93 +            }
    1.94 +        } else if (type == 'e') {
    1.95 +            int enumT = dis.readUnsignedShort();
    1.96 +            int enumN = dis.readUnsignedShort();
    1.97 +        } else {
    1.98 +            throw new IOException("Unknown type " + type);
    1.99 +        }
   1.100 +    }
   1.101 +}