/*
 * 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.sling.rewriter;

import java.io.IOException;
import java.io.PrintWriter;

import org.xml.sax.ContentHandler;

/**
 * A <code>Processor</code> post processes the output.
 */
public interface Processor {

    /**
     * Initialize this component.
     * @param context The invocation context.
     * @param config The configuration for this component.
     * @throws IOException If an error occurs
     */
    void init(ProcessingContext context,
              ProcessorConfiguration config)
    throws IOException;

    /**
     * Get the writer to write the output to.
     * @return A print writer.
     */
    PrintWriter getWriter();

    /**
     * Get the content handler to write the output to.
     * @return A content handler
     */
    ContentHandler getContentHandler();

    /**
     * Clean up the processor.
     * This method should always be called after a processor run, regardless if it was successfull or failed.
     * @param errorOccured Indicates if an error occured during processing
     */
    void finished(boolean errorOccured) throws IOException;
}