/*
* Copyright 2010 Granule Inc.
*
* Licensed 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 com.granule.utils;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Date;
import java.util.Enumeration;
import java.util.Properties;
/**
* This class extends the Properties class to provide the ability to load
* properties file using UTF-8 encoding
*
* @see java.util.Properties
*/
public class Utf8Properties extends Properties {
private static final long serialVersionUID = 1L;
public static final String ENCODING = "UTF-8";
private static final String COMMENT = "#!";
/**
* Possible Separator between key and value of a property in a property file
*/
private static final String keyValueSeparators = "=:\r\n\f";
public Utf8Properties() {
this(null);
}
public Utf8Properties(Properties defaults) {
this.defaults = defaults;
}
public synchronized void load(InputStream inStream) throws IOException {
BufferedReader in = new BufferedReader(new InputStreamReader(inStream,
ENCODING));
String line = in.readLine();
while (line != null) {
line = removeWhiteSpaces(line);
if (!line.equals("") && COMMENT.indexOf(line.charAt(0)) == -1) {
String property = line;
// Reads the whole property if it is on multiple lines
while (continueLine(line)) {
property = property.substring(0, property.length() - 1);
line = in.readLine();
property += line;
}
if (!property.equals("")) {
int endOfKey = 0;
while (endOfKey < property.length()
&& (keyValueSeparators.indexOf(property
.charAt(endOfKey)) == -1)) {
endOfKey++;
}
String key = property.substring(0, endOfKey).trim();
String value = property.substring(endOfKey + 1,
property.length()).trim();
put(key, value);
}
}
line = in.readLine();
}
}
public static String removeWhiteSpaces(String line) {
int index = 0;
while (index < line.length()
&& keyValueSeparators.indexOf(line.charAt(index)) != -1) {
index++;
}
return line.substring(index, line.length());
}
private boolean continueLine(String line) {
if (line != null && !line.equals("")) {
return line.charAt(line.length() - 1) == '\\';
}
return false;
}
@SuppressWarnings("unchecked")
public void store(OutputStream out, String header) throws IOException {
BufferedWriter output;
output = new BufferedWriter(new OutputStreamWriter(out, ENCODING));
if (header != null) {
output.write("#" + header);
output.newLine();
}
output.write("#" + new Date());
output.newLine();
synchronized (this) {
Enumeration e = keys();
while (e.hasMoreElements()) {
String key = (String) e.nextElement();
String val = (String) get(key);
output.write(key + "=" + val);
output.newLine();
}
}
output.flush();
}
}