com.cloudhopper.commons.charset.PackedGSMCharset Maven / Gradle / Ivy

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Utility classes for converting between charsets (mostly "mobile" in nature) such as Unicode to GSM and vice versa

There is a newer version: 3.0.2

package com.cloudhopper.commons.charset;

/*
 * #%L
 * ch-commons-charset
 * %%
 * Copyright (C) 2012 Cloudhopper by Twitter
 * %%
 * 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.
 * #L%
 */

/**
 * The PackedGSMCharset class handles the encoding and decoding of the
 * GSM default encoding charset, with packing as per GSM 03.38 spec.
 *
 * The encoding and decoding are based on the mapping at
 * http://www.unicode.org/Public/MAPPINGS/ETSI/GSM0338.TXT
 * 
 * @author joelauer (twitter: @jjlauer or http://twitter.com/jjlauer)
 */
public class PackedGSMCharset extends GSMCharset {

    @Override
    public byte[] encode(CharSequence str0) {
        // delete to parent first
        byte[] unpacked = super.encode(str0);
        // return a "packed" version of it
        return GSMBitPacker.pack(unpacked);
    }

    @Override
    public void decode(byte[] bytes, StringBuilder buffer) {
        // unpack the byte array first
        byte[] unpacked = GSMBitPacker.unpack(bytes);
        // delegate to parent
        super.decode(unpacked, buffer);
    }

}