ULongChunk.java

/*
 * Digital Audio Access Protocol (DAAP) Library
 * Copyright (C) 2004-2010 Roger Kapsi
 *
 * 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.
 */

package org.ardverk.daap.chunks;

import java.math.BigInteger;

/**
 * An unsigned long
 */
public abstract class ULongChunk extends AbstractChunk implements LongChunk {

    public static final String MIN_VALUE = "0";
    public static final String MAX_VALUE = "18446744073709551615";

    protected long value = 0;

    public ULongChunk(int type, String name, long value) {
        super(type, name);
        setValue(value);
    }

    public ULongChunk(String type, String name, long value) {
        super(type, name);
        setValue(value);
    }

    public void setValue(long value) {
        this.value = value;
    }

    public long getValue() {
        return value;
    }

    public BigInteger getUnsignedValue() {
        long l = getValue();
        byte[] b = new byte[8 + 1];

        b[0] = 0;
        b[1] = (byte) ((l >> 56l) & 0xFF);
        b[2] = (byte) ((l >> 48l) & 0xFF);
        b[3] = (byte) ((l >> 40l) & 0xFF);
        b[4] = (byte) ((l >> 32l) & 0xFF);
        b[5] = (byte) ((l >> 24l) & 0xFF);
        b[6] = (byte) ((l >> 16l) & 0xFF);
        b[7] = (byte) ((l >> 8l) & 0xFF);
        b[8] = (byte) ((l) & 0xFF);

        return new BigInteger(b);
    }

    /**
     * Returns {@see #U_LONG_TYPE}
     */
    public int getType() {
        return Chunk.U_LONG_TYPE;
    }

    public String toString(int indent) {
        return indent(indent) + name + "(" + getContentCodeString()
                + "; ulong)=" + getUnsignedValue();
    }
}