    001/*
    002 *  Licensed to the Apache Software Foundation (ASF) under one or more
    003 *  contributor license agreements.  See the NOTICE file distributed with
    004 *  this work for additional information regarding copyright ownership.
    005 *  The ASF licenses this file to You under the Apache License, Version 2.0
    006 *  (the "License"); you may not use this file except in compliance with
    007 *  the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 *  Unless required by applicable law or agreed to in writing, software
    012 *  distributed under the License is distributed on an "AS IS" BASIS,
    013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 *  See the License for the specific language governing permissions and
    015 *  limitations under the License.
    016 */
    017package org.apache.commons.compress.harmony.unpack200.bytecode;
    018
    019import java.io.DataOutputStream;
    020import java.io.IOException;
    021
    022/**
    023 * ClassFile is used to represent and write out Java class files.
    024 */
    025public class ClassFile {
    026
    027    public int major;
    028    public int minor;
    029    private final int magic = 0xCAFEBABE;
    030    public ClassConstantPool pool = new ClassConstantPool();
    031    public int accessFlags;
    032    public int thisClass;
    033    public int superClass;
    034    public int[] interfaces;
    035    public ClassFileEntry[] fields;
    036    public ClassFileEntry[] methods;
    037    public Attribute[] attributes;
    038
    039    public void write(final DataOutputStream dos) throws IOException {
    040        dos.writeInt(magic);
    041        dos.writeShort(minor);
    042        dos.writeShort(major);
    043        dos.writeShort(pool.size() + 1);
    044        for (int i = 1; i <= pool.size(); i++) {
    045            ConstantPoolEntry entry;
    046            (entry = (ConstantPoolEntry) pool.get(i)).doWrite(dos);
    047            // Doubles and longs take up two spaces in the pool, but only one
    048            // gets written
    049            if (entry.getTag() == ConstantPoolEntry.CP_Double || entry.getTag() == ConstantPoolEntry.CP_Long) {
    050                i++;
    051            }
    052        }
    053        dos.writeShort(accessFlags);
    054        dos.writeShort(thisClass);
    055        dos.writeShort(superClass);
    056        dos.writeShort(interfaces.length);
    057        for (int i = 0; i < interfaces.length; i++) {
    058            dos.writeShort(interfaces[i]);
    059        }
    060        dos.writeShort(fields.length);
    061        for (int i = 0; i < fields.length; i++) {
    062            fields[i].write(dos);
    063        }
    064        dos.writeShort(methods.length);
    065        for (int i = 0; i < methods.length; i++) {
    066            methods[i].write(dos);
    067        }
    068        dos.writeShort(attributes.length);
    069        for (int i = 0; i < attributes.length; i++) {
    070            attributes[i].write(dos);
    071        }
    072    }
    073}