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/*

Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016.  All rights reserved.

Contact:
     SYSTAP, LLC DBA Blazegraph
     2501 Calvert ST NW #106
     Washington, DC 20008
     [email protected]

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
package com.bigdata.bop.constraint;

import java.util.Map;

import com.bigdata.bop.BOp;
import com.bigdata.bop.BOpBase;
import com.bigdata.bop.IBindingSet;

/**
 * Imposes the constraint x OR y.
 */
public class OR extends BOpBase implements BooleanValueExpression {

    /**
	 * 
	 */
	private static final long serialVersionUID = 5066076800100837774L;

	public OR(final BooleanValueExpression x, final BooleanValueExpression y) {

        this(new BOp[] { x, y }, null/*annocations*/);

    }

	/**
     * Shallow copy constructor (required).
     */
    public OR(final BOp[] args, final Map anns) {
    	super(args, anns);
        
        if (args.length != 2 || args[0] == null || args[1] == null)
            throw new IllegalArgumentException();

    }

    /**
     * Constructor required for {@link com.bigdata.bop.BOpUtility#deepCopy(FilterNode)}.
     */
    public OR(final OR op) {
        super(op);
    }

    @Override
    public BooleanValueExpression get(final int i) {
    	return (BooleanValueExpression) super.get(i);
    }
    
    public Boolean get(final IBindingSet s) {

        return get(0).get(s) || get(1).get(s);

    }
    
}