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'rapiddweller Script' is an open source software library for resolving Java-like script expressions,
forked from Databene Scripts written by Volker Bergmann.
/*
* Copyright (C) 2011-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.rapiddweller.script.expression;
import com.rapiddweller.commons.Context;
import com.rapiddweller.commons.converter.AnyConverter;
import com.rapiddweller.script.Expression;
/**
* {@link Expression} implementation that evaluates a boolean (condition) expression
* and, depending if the result was true or false, evaluates the first or second expression delegate.
* The semantic is like the Java expression (condition ? alt1 : alt2).
*
* Created at 06.10.2009 16:04:15
* @since 0.6.0
* @author Volker Bergmann
*/
public class ConditionalExpression extends DynamicExpression {
private Expression condition;
private Expression alt1;
private Expression alt2;
public ConditionalExpression(Expression condition,
Expression alt1, Expression alt2) {
this.condition = condition;
this.alt1 = alt1;
this.alt2 = alt2;
}
@Override
public E evaluate(Context context) {
boolean cond = AnyConverter.convert(condition.evaluate(context), Boolean.class);
return (cond ? alt1 : alt2).evaluate(context);
}
@Override
public String toString() {
return "(" + condition + " ? " + alt1 + " : " + alt2 + ")";
}
}