/*
* Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
*
* 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; either version 3 of the License, or (at your option)
* any later version.
* 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, see http://www.gnu.org/licenses/
*/
package com.bc.ceres.binio.expr;
import com.bc.ceres.binio.CompoundData;
import java.io.IOException;
public class ChoiceExpr extends AbstractExpression {
private final Expression condition;
private final Expression expression1;
private final Expression expression2;
public ChoiceExpr(Expression condition, Expression expression1, Expression expression2) {
this.condition = condition;
this.condition.setParent(this);
this.expression1 = expression1;
this.expression1.setParent(this);
this.expression2 = expression2;
this.expression2.setParent(this);
}
public boolean isConstant() {
return condition.isConstant()
&& expression1.isConstant()
&& expression2.isConstant();
}
public Object evaluate(CompoundData context) throws IOException {
final Object result = this.condition.evaluate(context);
if (Boolean.TRUE.equals(result)) {
return expression1.evaluate(context);
} else {
return expression2.evaluate(context);
}
}
}