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A java-based parser for parsing/grabbing web sites and other text or XML documents, based on a nondeterministic parser language, creating XML output. Also contains a few utility classes for HTML, CSV and text parsing, and additional character sets. The jMatchParser-charset module contains the character sets.

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/*
 * Copyright (c) 2009 - 2011 Michael Schierl
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *   
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *   
 * - Neither name of the copyright holders nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *   
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND THE CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.sf.jmatchparser.util.charset;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.util.Map;

class MapBasedEncoder extends CharsetEncoder {

	private final Map encoderMap;

	MapBasedEncoder(Charset cs, Map encoderMap, float avgBytesPerChar, float maxBytesPerChar, byte[] replacement) {
		super(cs, avgBytesPerChar, maxBytesPerChar, replacement);
		this.encoderMap = encoderMap;
	}

	@Override
	protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) {
		while (in.remaining() > 0) {
			byte[] bs = encoderMap.get(in.get());
			if (bs == null) {
				in.position(in.position() - 1);
				return CoderResult.unmappableForLength(1);
			} else if (out.remaining() < bs.length) {
				in.position(in.position() - 1);
				return CoderResult.OVERFLOW;
			}
			out.put(bs);
		}
		return CoderResult.UNDERFLOW;
	}
}