/*
* (c) Copyright 2010-2011 by Volker Bergmann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted under the terms of the
* GNU General Public License (GPL).
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
* REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
* HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.databene.benerator.util;
import org.databene.benerator.wrapper.ProductWrapper;
import org.databene.script.Expression;
/**
* Evaluates an {@link Expression} on each call to {@link ExpressionBasedGenerator#generate(ProductWrapper)}
* and returns its results.<br/><br/>
* Created: 27.03.2010 19:51:46
* @since 0.6.0
* @author Volker Bergmann
*/
public class ExpressionBasedGenerator<E> extends ThreadSafeGenerator<E> {
private Expression<E> expression;
private Class<E> generatedType;
public ExpressionBasedGenerator(Expression<E> expression, Class<E> generatedType) {
this.expression = expression;
this.generatedType = generatedType;
}
public ProductWrapper<E> generate(ProductWrapper<E> wrapper) {
return wrapper.wrap(expression.evaluate(context));
}
public Class<E> getGeneratedType() {
return generatedType;
}
@Override
public String toString() {
return getClass().getSimpleName() + "(" + expression + " -> " + generatedType + ")";
}
}