001    /*
002    // $Id: //open/mondrian/src/main/mondrian/calc/impl/AbstractBooleanCalc.java#4 $
003    // This software is subject to the terms of the Common Public License
004    // Agreement, available at the following URL:
005    // http://www.opensource.org/licenses/cpl.html.
006    // Copyright (C) 2006-2007 Julian Hyde
007    // All Rights Reserved.
008    // You must accept the terms of that agreement to use this software.
009    */
010    package mondrian.calc.impl;
011    
012    import mondrian.olap.Evaluator;
013    import mondrian.olap.Exp;
014    import mondrian.olap.type.BooleanType;
015    import mondrian.calc.*;
016    
017    /**
018     * Abstract implementation of the {@link mondrian.calc.BooleanCalc} interface.
019     *
020     * <p>The derived class must
021     * implement the {@link #evaluateBoolean(mondrian.olap.Evaluator)} method,
022     * and the {@link #evaluate(mondrian.olap.Evaluator)} method will call it.
023     *
024     * @author jhyde
025     * @version $Id: //open/mondrian/src/main/mondrian/calc/impl/AbstractBooleanCalc.java#4 $
026     * @since Sep 26, 2005
027     */
028    public abstract class AbstractBooleanCalc
029            extends AbstractCalc
030            implements BooleanCalc {
031        private final Calc[] calcs;
032    
033        public AbstractBooleanCalc(Exp exp, Calc[] calcs) {
034            super(exp);
035            this.calcs = calcs;
036            // now supports int and double conversion (see AbstractExpCompiler.compileBoolean()
037            // assert getType() instanceof BooleanType;
038        }
039    
040        public Object evaluate(Evaluator evaluator) {
041            return Boolean.valueOf(evaluateBoolean(evaluator));
042        }
043    
044        public Calc[] getCalcs() {
045            return calcs;
046        }
047    }
048    
049    // End AbstractBooleanCalc.java