Custom_attribute.java

/*
 *  Copyright (c) 2001-2024, Jean Tessier
 *  All rights reserved.
 *  
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *  
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *  
 *      * Neither the name of Jean Tessier nor the names of his contributors
 *        may be used to endorse or promote products derived from this software
 *        without specific prior written permission.
 *  
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jeantessier.classreader.impl;

import java.io.*;

import org.apache.logging.log4j.*;

import com.jeantessier.classreader.*;
import com.jeantessier.text.*;

public class Custom_attribute extends Attribute_info implements com.jeantessier.classreader.Custom_attribute {
    private final String name;
    private final byte[] info;

    public Custom_attribute(ConstantPool constantPool, Visitable owner, DataInput in) throws IOException {
        this(constantPool, owner, in, "");
    }

    public Custom_attribute(ConstantPool constantPool, Visitable owner, DataInput in, String name) throws IOException {
        super(constantPool, owner);

        this.name = name;

        int byteCount = in.readInt();
        LogManager.getLogger(getClass()).debug("Attribute length: {}", byteCount);

        this.info = new byte[byteCount];
        in.readFully(info);

        LogManager.getLogger(getClass()).debug("Read {} byte(s): {}", () -> byteCount, () -> Hex.toString(this.info));
    }

    public String getName() {
        return name;
    }

    public byte[] getInfo() {
        return info;
    }

    public String toString() {
        return "Custom \"" + name + "\" " + getInfo().length + " byte(s)";
    }

    public String getAttributeName() {
        return "Custom";
    }

    public void accept(Visitor visitor) {
        visitor.visitCustom_attribute(this);
    }
}