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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
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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package org.openoffice.test.vcl;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;

/**
 * 
 * The class is used to read an from external files to replace the id in the code. 
 */
public class IDList {
	
	private HashMap<String, String> map = new HashMap<String, String>();
	
	private File dir = null;
	
	public IDList(File dir) {
		this.dir = dir;
		load();
	}
	
	
	private void readFile(File file, HashMap<String, String> map) {
		BufferedReader reader = null;
		try {
			reader = new BufferedReader(new FileReader(file));
			String line = null;
			while ((line = reader.readLine()) != null ) {
				line = line.trim();
				if (line.length() == 0 /*|| line.startsWith("//")*/)
					continue;
				String[] parts = line.split(" ");
				if (parts.length != 2)
					continue;
				map.put(parts[0], parts[1]);
			}
			
		} catch (IOException e) {
			// for debug
			e.printStackTrace();
		} finally {
			if (reader != null)
				try {
					reader.close();
				} catch (IOException e) {
					// ignore
				}
		}
	}
	
	
	public void load() {
		if (dir == null)
			return;
		
		map.clear();
		ArrayList<File> validFiles = new ArrayList<File>();
		File[] files = dir.listFiles();
		if (files == null)
			return;
		
		for (File file : files) {
			if (file.isFile() && file.getName().endsWith(".lst")) {
				validFiles.add(file);
			}
		}
		
		// Sort by file name. Maybe the sorting is redundant!?
		Collections.sort(validFiles, new Comparator<File>() {
			public int compare(File o1, File o2) {
				return o1.getName().compareTo(o2.getName());
			}
		});
		
		for (File file: validFiles) {
			readFile(file, map);
		}
	}
	
	public String getId(String id) {
		String value = map.get(id);
		if (value == null) {
			int i = id.indexOf("_");
			if (i >= 0) {
				value = map.get(id.substring(++i));
			}
		}
		if (value != null)
			//The external definition overwrites the id.
			id = value;
		
		return id;
	}
}