/*
 * %CopyrightBegin%
 * 
 * Copyright Ericsson AB 2000-2009. All Rights Reserved.
 * 
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * %CopyrightEnd%
 */
package com.ericsson.otp.erlang;

import java.io.Serializable;

/**
 * Provides a Java representation of Erlang binaries. Anything that can be
 * represented as a sequence of bytes can be made into an Erlang binary.
 */
public class OtpErlangBinary extends OtpErlangBitstr implements Serializable,
	Cloneable {
    // don't change this!
    static final long serialVersionUID = -3781009633593609217L;

    /**
     * Create a binary from a byte array
     * 
     * @param bin
     *                the array of bytes from which to create the binary.
     */
    public OtpErlangBinary(final byte[] bin) {
	super(bin);
    }

    /**
     * Create a binary from a stream containing a binary encoded in Erlang
     * external format.
     * 
     * @param buf
     *                the stream containing the encoded binary.
     * 
     * @exception OtpErlangDecodeException
     *                    if the buffer does not contain a valid external
     *                    representation of an Erlang binary.
     */
    public OtpErlangBinary(final OtpInputStream buf)
	    throws OtpErlangDecodeException {
	super(new byte[0]);
	bin = buf.read_binary();
	pad_bits = 0;
    }

    /**
     * Create a binary from an arbitrary Java Object. The object must implement
     * java.io.Serializable or java.io.Externalizable.
     * 
     * @param o
     *                the object to serialize and create this binary from.
     */
    public OtpErlangBinary(final Object o) {
	super(o);
    }

    /**
     * Convert this binary to the equivalent Erlang external representation.
     * 
     * @param buf
     *                an output stream to which the encoded binary should be
     *                written.
     */
    @Override
    public void encode(final OtpOutputStream buf) {
	buf.write_binary(bin);
    }

    @Override
    public Object clone() {
	final OtpErlangBinary that = (OtpErlangBinary) super.clone();
	return that;
    }
}
