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benerator is a framework for creating realistic and valid high-volume test data, used for testing (unit/integration/load) and showcase setup. Metadata constraints are imported from systems and/or configuration files. Data can imported from and exported to files and systems, anonymized or generated from scratch. Domain packages provide reusable generators for creating domain-specific data as names and addresses internationalizable in language and region. It is strongly customizable with plugins and configuration options.

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/*
 * (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.composite;

import org.databene.benerator.engine.BeneratorContext;
import org.databene.commons.Assert;
import org.databene.script.Expression;

/**
 * {@link ComponentBuilder} which executes only if a condition expression evaluates to 'true'.


 * Created: 11.10.2010 11:15:14
 * @since 0.6.4
 * @author Volker Bergmann
 */
public class ConditionalComponentBuilder extends ComponentBuilderProxy {

	private Expression condition;
	
	public ConditionalComponentBuilder(ComponentBuilder source, Expression condition) {
	    super(source);
	    Assert.notNull(condition, "condition");
	    this.condition = condition;
    }

	@Override
    public boolean execute(BeneratorContext context) {
		Object conditionResult = condition.evaluate(context);
		if (conditionResult == null)
			throw new IllegalArgumentException("Condition resolves to null: " + condition);
		if (!(conditionResult instanceof Boolean))
			throw new IllegalArgumentException("Condition does not resolve to a boolean value: " + condition);
		if ((Boolean) conditionResult)
			return source.execute(context);
		else
			return true;
	}
	
}