/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2000-2009. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * %CopyrightEnd%
 */
package com.ericsson.otp.erlang;

/**
 * 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 {
    // don't change this!
    private 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;
    }
}
