Scala example source code file (JOtherAttribute.java)

This example Scala source code file (JOtherAttribute.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

datainputstream, io, ioexception, ioexception, jattribute, jclass, jotherattribute, jotherattribute, object, object, string, string, stringbuffer

The Scala JOtherAttribute.java source code

/* FJBG -- Fast Java Bytecode Generator
 * Copyright 2002-2011 LAMP/EPFL
 * @author  Michel Schinz
 */

package ch.epfl.lamp.fjbg;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

/**
 * Attributes which are unknown to the JVM (or at least to this library).
 *
 * @author Michel Schinz
 * @version 1.0
 */

public class JOtherAttribute extends JAttribute {
    protected final String name;
    protected final byte[] contents;
    protected final int length;

    public JOtherAttribute(FJBGContext context,
                           JClass clazz,
                           Object owner,
                           String name,
                           byte[] contents,
                           int length) {
        super(context, clazz, name);
        this.name = name;
        this.contents = contents;
        this.length = length;
    }

    public JOtherAttribute(FJBGContext context,
                           JClass clazz,
                           Object owner,
                           String name,
                           int size,
                           DataInputStream stream)
        throws IOException {
        super(context, clazz, name);
        this.name = name;
        this.contents = new byte[size];
        this.length = size;

        stream.read(contents, 0, length);
    }

    public String getName() { return name; }

    // Follows javap output format for user-defined attributes.
    /*@Override*/ public String toString() {
        StringBuffer buf = new StringBuffer("  ");
        buf.append(name);
        buf.append(": length = 0x");
        buf.append(Integer.toHexString(length).toUpperCase());
        for (int i = 0; i < length; ++i) {
            if (i % 16 == 0) buf.append("\n   ");
            buf.append(hexString(contents[i]));
            buf.append(" ");
        }
        buf.append("\n");
        return buf.toString();
    }

    protected int getSize() { return length; }

    protected void writeContentsTo(DataOutputStream stream) throws IOException {
        stream.write(contents, 0, length);
    }

    private static final String hexString(int i) {
        return ((0 <= i && i < 16) ? "0" : "")+Integer.toHexString(i).toUpperCase();
    }
}