AbstractChunk.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 org.ardverk.daap.DaapUtil;

/**
 * An abstract base class for Chunks.
 * 
 * @author Roger Kapsi
 */
public abstract class AbstractChunk implements Chunk {

    protected final int contentCode;
    protected final String name;

    /**
*
*/
    protected AbstractChunk(String contentCode, String name) {
        if (contentCode.length() != 4) {
            throw new IllegalArgumentException("Content Code must be 4 chars");
        }

        this.contentCode = DaapUtil.toContentCodeNumber(contentCode);
        this.name = name;
    }

    /**
*
*/
    protected AbstractChunk(int contentCode, String name) {
        this.contentCode = contentCode;
        this.name = name;
    }

    public int getContentCode() {
        return contentCode;
    }

    /**
     * Returns the 4 charecter content code of this Chunk as String
     */
    public String getContentCodeString() {
        return DaapUtil.toContentCodeString(contentCode);
    }

    /**
     * Returns the name of this Chunk
     */
    public String getName() {
        return name;
    }

    /**
     * Returns the type of this Chunk.
     */
    public abstract int getType();

    public String toString() {
        return toString(0);
    }

    public String toString(int indent) {
        return indent(indent) + name + "('" + getContentCodeString() + "')";
    }

    protected static String indent(int indent) {
        StringBuffer buffer = new StringBuffer(indent);
        for (int i = 0; i < indent; i++) {
            buffer.append(' ');
        }
        return buffer.toString();
    }
}