tikhomirov@69: /*
tikhomirov@69:  * Copyright (c) 2011 TMate Software Ltd
tikhomirov@69:  *  
tikhomirov@69:  * This program is free software; you can redistribute it and/or modify
tikhomirov@69:  * it under the terms of the GNU General Public License as published by
tikhomirov@69:  * the Free Software Foundation; version 2 of the License.
tikhomirov@69:  *
tikhomirov@69:  * This program is distributed in the hope that it will be useful,
tikhomirov@69:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@69:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@69:  * GNU General Public License for more details.
tikhomirov@69:  *
tikhomirov@69:  * For information on how to redistribute this software under
tikhomirov@69:  * the terms of a license other than GNU General Public License
tikhomirov@69:  * contact TMate Software at support@svnkit.com
tikhomirov@69:  */
tikhomirov@69: package org.tmatesoft.hg.internal;
tikhomirov@69: 
tikhomirov@69: import java.io.BufferedReader;
tikhomirov@69: import java.io.File;
tikhomirov@69: import java.io.FileReader;
tikhomirov@69: import java.io.IOException;
tikhomirov@69: import java.util.ArrayList;
tikhomirov@69: import java.util.Collections;
tikhomirov@69: import java.util.LinkedHashMap;
tikhomirov@69: import java.util.List;
tikhomirov@69: import java.util.Map;
tikhomirov@69: 
tikhomirov@69: /**
tikhomirov@69:  *
tikhomirov@69:  * @author Artem Tikhomirov
tikhomirov@69:  * @author TMate Software Ltd.
tikhomirov@69:  */
tikhomirov@69: public class ConfigFile {
tikhomirov@69: 
tikhomirov@69: 	private List<String> sections;
tikhomirov@69: 	private List<Map<String,String>> content;
tikhomirov@69: 
tikhomirov@69: 	public ConfigFile() {
tikhomirov@69: 	}
tikhomirov@69: 
tikhomirov@69: 	public void addLocation(File path) {
tikhomirov@69: 		read(path);
tikhomirov@69: 	}
tikhomirov@69: 	
tikhomirov@69: 	public List<String> getSectionNames() {
tikhomirov@69: 		return Collections.unmodifiableList(sections);
tikhomirov@69: 	}
tikhomirov@69: 
tikhomirov@69: 	public Map<String,String> getSection(String sectionName) {
tikhomirov@69: 		int x = sections.indexOf(sectionName);
tikhomirov@69: 		if (x == -1) {
tikhomirov@69: 			return Collections.emptyMap();
tikhomirov@69: 		}
tikhomirov@69: 		return Collections.unmodifiableMap(content.get(x));
tikhomirov@69: 	}
tikhomirov@69: 
tikhomirov@69: 	private void read(File f) {
tikhomirov@69: 		if (sections == null) {
tikhomirov@69: 			sections = new ArrayList<String>();
tikhomirov@69: 			content = new ArrayList<Map<String,String>>();
tikhomirov@69: 		}
tikhomirov@69: 		try {
tikhomirov@69: 			BufferedReader br = new BufferedReader(new FileReader(f));
tikhomirov@69: 			String line;
tikhomirov@69: 			String sectionName = "";
tikhomirov@69: 			Map<String,String> section = new LinkedHashMap<String, String>();
tikhomirov@69: 			while ((line = br.readLine()) != null) {
tikhomirov@69: 				line = line.trim();
tikhomirov@69: 				if (line.length() <= 2) { // a=b or [a] are at least of length 3
tikhomirov@69: 					continue;
tikhomirov@69: 				}
tikhomirov@69: 				int x;
tikhomirov@69: 				if (line.charAt(0) == '[' && line.charAt(line.length() - 1) == ']') {
tikhomirov@69: 					sectionName = line.substring(1, line.length() - 1);
tikhomirov@69: 					if (sections.indexOf(sectionName) == -1) {
tikhomirov@69: 						sections.add(sectionName);
tikhomirov@69: 						content.add(section = new LinkedHashMap<String, String>());
tikhomirov@69: 					} else {
tikhomirov@69: 						section = null; // drop cached value
tikhomirov@69: 					}
tikhomirov@69: 				} else if ((x = line.indexOf('=')) != -1) {
tikhomirov@69: 					String key = line.substring(0, x).trim();
tikhomirov@69: 					String value = line.substring(x+1).trim();
tikhomirov@69: 					if (section == null) {
tikhomirov@69: 						int i = sections.indexOf(sectionName);
tikhomirov@69: 						assert i >= 0;
tikhomirov@69: 						section = content.get(i);
tikhomirov@69: 					}
tikhomirov@69: 					if (sectionName.length() == 0) {
tikhomirov@69: 						// add fake section only if there are any values 
tikhomirov@69: 						sections.add(sectionName);
tikhomirov@69: 						content.add(section);
tikhomirov@69: 					}
tikhomirov@69: 					section.put(key, value);
tikhomirov@69: 				}
tikhomirov@69: 			}
tikhomirov@69: 		} catch (IOException ex) {
tikhomirov@69: 			ex.printStackTrace(); // XXX shall outer world care?
tikhomirov@69: 		}
tikhomirov@69: 		((ArrayList<?>) sections).trimToSize();
tikhomirov@69: 		((ArrayList<?>) content).trimToSize();
tikhomirov@69: 		assert sections.size() == content.size();
tikhomirov@69: 	}
tikhomirov@69: }