/* Software Name : AsmDex
 * Version : 1.0
 *
 * Copyright © 2012 France Télécom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the 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 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 OWNER OR 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 org.ow2.asmdex.encodedValue;

import org.ow2.asmdex.Opcodes;
import org.ow2.asmdex.structureWriter.ConstantPool;

/**
 * Class representing an Encoded Value containing a char.
 * 
 * @author Julien Névo
 */
public class EncodedValueCharacter extends EncodedValue {

	/**
	 * The Type of the Encoded Value.
	 */
	private int type = Opcodes.VALUE_CHAR;
	
	/**
	 * The value of the Encoded Value.
	 */
	private char value;
	
	/**
	 * Constructs the Encoded Value from its value.
	 * @param value the value.
	 */
	public EncodedValueCharacter(char value) {
		this.value = value;
	}
	
	/**
	 * Constructs the Encoded Value from an Object containing a value.
	 * @param value the Object containing a value.
	 */
	public EncodedValueCharacter(Object value) {
		this.value = (Character)value;
	}
	
	@Override
	public byte[] encode(ConstantPool constantPool) {
		byte[] result;
		int val = (Character)value;
		int nb1 = 0;
		int nb2 = 0;
		int size = 1;
		if (val != 0) {
			nb1 = val & 0xff;
			val = val >>> 8;
			if (val != 0) {
				size++;
				nb2 = val & 0xff;
			}
		}
		result = new byte[size + 1]; // We keep the first entry to code the "header".
		if (size > 1) { result[2] = (byte)nb2; }
		result[1] = (byte)nb1;
		result[0] = EncodedValueUtil.encodeHeader(size, type);
		return result;
	}

	@Override
	public int getType() {
		return type;
	}
	
	
	// -----------------------------------------------------
	// Overridden Methods.
	// -----------------------------------------------------

	@Override
	public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

		boolean result = false;
		
		if (o instanceof EncodedValueCharacter) {
			EncodedValueCharacter encodedValue = (EncodedValueCharacter)o;
			result = ((type == encodedValue.type) && (value == encodedValue.value));
		}
		
		return result;
	}
	
	@Override
	public int hashCode() {
		return type + value * 729;
	}
	
	@Override
	int compareValue(EncodedValue encodedValue) {
		if (this == encodedValue) {
			return 0;
		}
		
		EncodedValueCharacter ec = (EncodedValueCharacter)encodedValue;
		char value2 = ec.value;
		return (value == value2 ? 0 : (value > value2 ? 1 : -1));
	}
	
    @Override
    public String toString() {
        return String.valueOf(value);
    }

}