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/*
 * Copyright (c) 2013, SRI International
 * All rights reserved.
 * Licensed under the The BSD 3-Clause License;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 * 
 * http://opensource.org/licenses/BSD-3-Clause
 * 
 * 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 the name of the aic-expresso 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 HOLDER 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 com.sri.ai.expresso.core;

import java.util.List;

import com.google.common.annotations.Beta;
import com.sri.ai.expresso.api.Expression;
import com.sri.ai.expresso.api.IndexExpressionsSet;
import com.sri.ai.expresso.api.IntensionalSet;

/**
 * A default implementation of a {@link IntensionalSet} for unisets.
 * 
 * @author braz
 */
@Beta
public class DefaultIntensionalUniSet extends AbstractIntensionalSet implements IntensionalSet {

	private static final long serialVersionUID = 1L;
	
	public DefaultIntensionalUniSet(IndexExpressionsSet indexExpressions, Expression head, Expression condition) {
		super(indexExpressions, head, condition);
	}

	public DefaultIntensionalUniSet(List indexExpressionsList, Expression head, Expression condition) {
		this(new ExtensionalIndexExpressionsSet(indexExpressionsList), head, condition);
	}

	@Override
	public String getSyntaxTreeLabel() {
		return IntensionalSet.UNI_SET_LABEL;
	}

	@Override
	public boolean isUniSet() {
		return true;
	}

	@Override
	public boolean isMultiSet() {
		return false;
	}

	@Override
	public DefaultIntensionalUniSet make(IndexExpressionsSet indexExpressions, Expression head, Expression condition) {
		return new DefaultIntensionalUniSet(indexExpressions, head, condition);
	}

	@Override
	protected String getOpeningBrackets() {
		return "{";
	}

	@Override
	protected String getClosingBrackets() {
		return "}";
	}
}