/* * 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); } } }