Java ByteBuffer to String decodeString(ByteBuffer src)

Description

decode String

License

Apache License

Declaration

private static String decodeString(ByteBuffer src)
            throws CharacterCodingException 

Method Source Code

//package com.java2s;
/*//from   w ww.  j av  a 2  s  . c o  m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;

public class Main {
    private final static ThreadLocal<CharsetDecoder> decoder = new ThreadLocal<CharsetDecoder>() {
        @Override
        protected CharsetDecoder initialValue() {
            return Charset.forName("UTF-8").newDecoder();
        }
    };

    private static String decodeString(ByteBuffer src)
            throws CharacterCodingException {
        // the decoder needs to be reset every time we use it, hence the copy per thread
        CharsetDecoder theDecoder = decoder.get();
        theDecoder.reset();

        final CharBuffer dst = CharBuffer.allocate((int) ((double) src
                .remaining() * theDecoder.maxCharsPerByte()));

        CoderResult cr = theDecoder.decode(src, dst, true);
        if (!cr.isUnderflow())
            cr.throwException();

        cr = theDecoder.flush(dst);
        if (!cr.isUnderflow())
            cr.throwException();

        return dst.flip().toString();
    }
}

Related

1. byteBufferToString(ByteBuffer stringBuf)
2. bytesToString(ByteBuffer buf, int off, int len)
3. convertBufferToString(ByteBuffer buffer)
4. decodeString(ByteBuffer bb)
5. decodeString(ByteBuffer buffer, String charset)
6. getStr(ByteBuffer buff)
7. getString(@Nonnull final ByteBuffer src)
8. getString(ByteBuffer bb)
9. getString(ByteBuffer buf)