UCS2Charset.java

/**
 * Copyright (C) 2011 Twitter, Inc.
 *
 * 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 com.cloudhopper.commons.charset;

import org.apache.log4j.Logger;

/**
 * 
 *
 * @author joelauer
 */
public class UCS2Charset extends JavaCharset {
    private static final Logger logger = Logger.getLogger(UCS2Charset.class);

    public UCS2Charset() {
        super("ISO-10646-UCS-2");
    }

    public int estimateEncodeByteLength(CharSequence str0) {
        if (str0 == null) {
            return 0;
        }
        // let's double the estimate
        return str0.length() * 2;
    }

    public int estimateDecodeCharLength(byte[] bytes) {
        if (bytes == null) {
            return 0;
        }
        if (bytes.length % 2 == 0) {
            return bytes.length / 2;
        } else {
            return (bytes.length / 2) + 1;
        }
    }

}