/*
 * (c) Copyright 2007-2011 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.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * 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.wrapper;

import org.databene.benerator.Generator;
import org.databene.benerator.IllegalGeneratorStateException;
import org.databene.benerator.InvalidGeneratorSetupException;

/**
 * Wraps another Generator of same product type.<br/>
 * <br/>
 * Created: 17.08.2007 19:05:42
 * @author Volker Bergmann
 */
public abstract class GeneratorProxy<E> extends GeneratorWrapper<E, E> {
	
	protected Class<E> generatedType;
	
    // constructors ----------------------------------------------------------------------------------------------------

    public GeneratorProxy(Class<E> generatedType) {
        super(null);
        this.generatedType = generatedType;
    }
    
    public GeneratorProxy(Generator<E> source) {
        super(source);
        if (source == null)
        	throw new InvalidGeneratorSetupException("source is null");
    }
    
    // Generator interface implementation ------------------------------------------------------------------------------

    public Class<E> getGeneratedType() {
		if (getSource() != null)
			return getSource().getGeneratedType();
		else if (generatedType != null)
			return generatedType;
		else
			throw new IllegalGeneratorStateException("Generator not initialized correctly: " + this);
    }

    public ProductWrapper<E> generate(ProductWrapper<E> wrapper) {
    	assertInitialized();
    	return getSource().generate(wrapper);
    }

	@Override
	public String toString() {
		return getClass().getSimpleName() + '[' + getSource() + ']';
	}
	
}