/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.cocoon.transformation;

import java.io.IOException;
import java.util.Map;

import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.environment.SourceResolver;
import org.xml.sax.SAXException;

/**
 * This class can be used as a base class for own transformer implementations
 * that need to lookup other components.
 * 
 * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
 *         (Apache Software Foundation)
 * @version CVS $Id$
 */

public abstract class ServiceableTransformer 
    extends AbstractTransformer 
    implements Serviceable, Disposable {

    /** The current <code>SourceResolver</code>. */
    protected SourceResolver resolver;
    /** The current <code>Map</code> objectModel. */
    protected Map objectModel;
    /** The current <code>Parameters</code>. */
    protected Parameters parameters;
    /** The source URI associated with the request or <b>null</b>. */
    protected String source;
    /** The ServiceManager */
    protected ServiceManager manager;
    
    /**
     * Set the <code>SourceResolver</code>, object model <code>Map</code>,
     * the source and sitemap <code>Parameters</code> used to process the request.
     */
    public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par)
    throws ProcessingException, SAXException, IOException {
        this.resolver = resolver;
        this.objectModel = objectModel;
        this.source = src;
        this.parameters = par;
    }

    /**
     * Recycle the generator by removing references
     */
    public void recycle() {
        super.recycle();
        this.resolver = null;
        this.objectModel = null;
        this.source = null;
        this.parameters = null;
    }
    
    /* (non-Javadoc)
     * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
     */
    public void service(ServiceManager manager) throws ServiceException {
        this.manager = manager;
    }

    /* (non-Javadoc)
     * @see org.apache.avalon.framework.activity.Disposable#dispose()
     */
    public void dispose() {
        this.manager = null;
    }

}