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/*
 * Copyright (C) 2011-2014 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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 org.databene.formats.regex;

import org.databene.commons.CharSet;

/**
 * Represents a character within a range from {@link #first} to {@link #last}.


 * Created: 04.04.2014 17:05:57
 * @since 0.8.0
 * @author Volker Bergmann
 */

public class CharRange extends RegexCharClass {
	
	private String name;
	private char first;
	private char last;
	
	public CharRange(String name, char first, char last) {
		this.name = name;
		this.first = first;
		this.last = last;
	}
	
	@Override
	public CharSet getCharSet() {
		return new CharSet(name, first, last);
	}
	
	@Override
	public String toString() {
		return name;
	}

	@Override
	public int hashCode() {
		return 31 * first + last;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null || getClass() != obj.getClass())
			return false;
		CharRange that = (CharRange) obj;
		return (this.first == that.first && this.last == that.last);
	}
	
}