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/*
 * 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.tuscany.sca.domain.search.impl;

import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;

import org.apache.lucene.document.Field;
import org.apache.tuscany.sca.domain.search.DocumentMap;
import org.apache.tuscany.sca.domain.search.DocumentProcessor;

/**
 * 
 * @version $Rev$ $Date$
 */
public class DefaultFileDocumentProcessor implements DocumentProcessor {

	public Document process(DocumentProcessor parentProcessor,
			DocumentMap documents, Object object, Document doc, String parent) {

		if (object instanceof FileContent) {
			FileContent file = (FileContent) object;
			
			Reader reader;
			try {
				reader = new InputStreamReader(file.getInputStream());
				
				if (doc == null) {
					doc = documents.get(file.getPath());
				}
				
				doc.add(new Field(SearchFields.FILE_CONTENT_FIELD, reader));
				
				doc.add(new Field(SearchFields.FILE_CONTENT_FIELD,
						"", Field.Store.YES,
						Field.Index.ANALYZED));
				
				return doc;
				
			} catch (IOException e) {
				// ignore the file
			}
			
		}
		
		return null;

	}

	public Object getDocumentKey(Object object) {

		if (object instanceof File) {
			File file = (File) object;
			String path = file.getPath();

			if (path != null && path.length() == 0) {
				return null;
			}

			return path;

		}

		throw new IllegalArgumentException();

	}

}