jpexs-decompiler/libsrc/ffdec_lib/src/com/jpexs/helpers/plugin/JavaClassObject.java

/*
 *  Copyright (C) 2010-2024 JPEXS, Miron Sadziak, All rights reserved.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 */
package com.jpexs.helpers.plugin;

import javax.tools.SimpleJavaFileObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;

/**
 * A file object used to represent compiled classes in memory.
 * @author JPEXS
 */
public class JavaClassObject extends SimpleJavaFileObject {

    /**
     * Byte code created by the compiler will be stored in this
     * ByteArrayOutputStream so that we can later get the byte array out of it
     * and put it in the memory as an instance of our class.
     */
    protected final ByteArrayOutputStream bos = new ByteArrayOutputStream();

    /**
     * Registers the compiled class object under URI containing the class full
     * name
     *
     * @param name Full name of the compiled class
     * @param kind Kind of the data. It will be CLASS in our case
     */
    public JavaClassObject(String name, Kind kind) {
        super(URI.create("string:///" + name.replace('.', '/')
                + kind.extension), kind);
    }

    /**
     * Will be used by our file manager to get the byte code that can be put
     * into memory to instantiate our class
     *
     * @return compiled byte code
     */
    public byte[] getBytes() {
        return bos.toByteArray();
    }

    /**
     * Will provide the compiler with an output stream that leads to our byte
     * array. This way the compiler will write everything into the byte array
     * that we will instantiate later
     *
     * @return
     * @throws java.io.IOException
     */
    @Override
    public OutputStream openOutputStream() throws IOException {
        return bos;
    }
}