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A generic parser and writer for all ISO 14496 based files (MP4, Quicktime, DCF, PDCF, ...)

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/*
 * Copyright 2012 Sebastian Annies, Hamburg
 *
 * 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.mp4parser.tools;

import java.io.UnsupportedEncodingException;

/**
 * Converts byte[] -> String and vice versa.
 */
public final class Utf8 {
    public static byte[] convert(String s) {
        try {
            if (s != null) {
                return s.getBytes("UTF-8");
            } else {
                return null;
            }
        } catch (UnsupportedEncodingException e) {
            throw new Error(e);
        }
    }

    public static String convert(byte[] b) {
        try {
            if (b != null) {
                return new String(b, "UTF-8");
            } else {
                return null;
            }
        } catch (UnsupportedEncodingException e) {
            throw new Error(e);
        }
    }

    public static int utf8StringLengthInBytes(String utf8) {
        try {
            if (utf8 != null) {
                return utf8.getBytes("UTF-8").length;
            } else {
                return 0;
            }
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException();
        }
    }
}