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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
public final class INIParser extends INISection {
// default file to read and write to
private final File mFile;
// List of sections in the current iniFile. null if the file has not been parsed yet
private Hashtable<String, INISection> mSections;
// create a parser. The file will not be read until you attempt to
// access sections or properties inside it. At that point its read synchronously
public INIParser(File iniFile) {
super("");
mFile = iniFile;
}
// write ini data to the default file. Will overwrite anything current inside
public void write() {
writeTo(mFile);
}
// write to the specified file. Will overwrite anything current inside
public void writeTo(File f) {
if (f == null)
return;
FileWriter outputStream = null;
try {
outputStream = new FileWriter(f);
} catch (IOException e1) {
e1.printStackTrace();
}
BufferedWriter writer = new BufferedWriter(outputStream);
try {
write(writer);
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void write(BufferedWriter writer) throws IOException {
super.write(writer);
if (mSections != null) {
for (Enumeration<INISection> e = mSections.elements(); e.hasMoreElements();) {
INISection section = e.nextElement();
section.write(writer);
writer.newLine();
}
}
}
// return all of the sections inside this file
public Hashtable<String, INISection> getSections() {
if (mSections == null) {
try {
parse();
} catch (IOException e) {
debug("Error parsing: " + e);
}
}
return mSections;
}
// parse the default file
@Override
protected void parse() throws IOException {
super.parse();
parse(mFile);
}
// parse a passed in file
private void parse(File f) throws IOException {
// Set up internal data members
mSections = new Hashtable<String, INISection>();
if (f == null || !f.exists())
return;
FileReader inputStream = null;
try {
inputStream = new FileReader(f);
} catch (FileNotFoundException e1) {
// If the file doesn't exist. Just return;
return;
}
BufferedReader buf = new BufferedReader(inputStream);
String line = null; // current line of text we are parsing
INISection currentSection = null; // section we are currently parsing
while ((line = buf.readLine()) != null) {
if (line != null)
line = line.trim();
// blank line or a comment. ignore it
if (line == null || line.length() == 0 || line.charAt(0) == ';') {
debug("Ignore line: " + line);
} else if (line.charAt(0) == '[') {
debug("Parse as section: " + line);
currentSection = new INISection(line.substring(1, line.length() - 1));
mSections.put(currentSection.getName(), currentSection);
} else {
debug("Parse as property: " + line);
String[] pieces = line.split("=");
if (pieces.length != 2)
continue;
String key = pieces[0].trim();
String value = pieces[1].trim();
if (currentSection != null) {
currentSection.setProperty(key, value);
} else {
mProperties.put(key, value);
}
}
}
buf.close();
}
// add a section to the file
public void addSection(INISection sect) {
// ensure that we have parsed the file
getSections();
mSections.put(sect.getName(), sect);
}
// get a section from the file. will return null if the section doesn't exist
public INISection getSection(String key) {
// ensure that we have parsed the file
getSections();
return mSections.get(key);
}
// remove an entire section from the file
public void removeSection(String name) {
// ensure that we have parsed the file
getSections();
mSections.remove(name);
}
// rename a section; nuking any previous section with the new
// name in the process
public void renameSection(String oldName, String newName) {
// ensure that we have parsed the file
getSections();
mSections.remove(newName);
INISection section = mSections.get(oldName);
if (section == null)
return;
section.setName(newName);
mSections.remove(oldName);
mSections.put(newName, section);
}
}
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