/* Copyright (c) 2012 Jesper Öqvist <jesper@llbit.se>
*
* This file is part of Chunky.
*
* Chunky is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Chunky is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with Chunky. If not, see <http://www.gnu.org/licenses/>.
*/
package se.llbit.chunky;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import org.jastadd.util.PrettyPrinter;
import se.llbit.json.JsonFalse;
import se.llbit.json.JsonNumber;
import se.llbit.json.JsonObject;
import se.llbit.json.JsonParser;
import se.llbit.json.JsonParser.SyntaxError;
import se.llbit.json.JsonString;
import se.llbit.json.JsonTrue;
/**
* Utility class for managing program properties.
*
* @author Jesper Öqvist <jesper@llbit.se>
*/
public final class JsonSettings {
private JsonObject json = new JsonObject();
/**
* Load saved properties.
* @param file
*/
public void load(File file) {
String path = file.getAbsolutePath();
try {
InputStream in = new FileInputStream(file);
JsonParser parser = new JsonParser(in);
json = parser.parse().object();
in.close();
if (System.getProperty("log4j.logLevel", "WARN").equals("INFO")) {
System.out.println("Settings loaded from " + path);
}
} catch (IOException e) {
if (System.getProperty("log4j.logLevel", "WARN").equals("INFO")) {
System.out.println("Warning: Could not load settings from " + path +
" - defaults will be used");
}
} catch (SyntaxError e) {
System.err.println("Warning: Could not load settings from " + path +
" (syntax error) - defaults will be used");
}
}
/**
* Save settings to file.
* @param file
*/
public void save(File file) {
String path = file.getAbsolutePath();
try {
OutputStream out = new FileOutputStream(file);
PrettyPrinter pp = new PrettyPrinter(" ", new PrintStream(out));
json.prettyPrint(pp);
out.close();
if (System.getProperty("log4j.logLevel", "WARN").equals("INFO")) {
System.out.println("Saved settings to " + path);
}
} catch (IOException e) {
System.err.println("Warning: Failed to save settings to " +
path + ": " + e.getMessage());
}
}
/**
* Get string value of a setting
* @param name Property name
* @param defValue Default value
* @return The value of the property, or <code>defValue</code> if
* the property was not set.
*/
public String getString(String name, String defValue) {
return json.get(name).stringValue(defValue);
}
/**
* Get boolean value of a setting
* @param name Property name
* @param defValue Default value
* @return The value of the property, or <code>defValue</code> if
* the property was not set.
*/
public boolean getBool(String name, boolean defValue) {
return json.get(name).boolValue(defValue);
}
/**
* Get the integer value of a setting
* @param name Property name
* @param defValue Default value
* @return The value of the property, or <code>defValue</code> if
* the property was not set, or was not set to a valid integer value.
*/
public int getInt(String name, int defValue) {
return json.get(name).intValue(defValue);
}
/**
* Get the double value of a setting
* @param name Property name
* @param defValue Default value
* @return The value of the property, or <code>defValue</code> if
* the property was not set, or was not set to a valid integer value.
*/
public double getDouble(String name, double defValue) {
return json.get(name).doubleValue(defValue);
}
/**
* Set string value
* @param name
* @param value
*/
public void setString(String name, String value) {
json.set(name, new JsonString(value));
}
/**
* Set boolean value
* @param name
* @param value
*/
public void setBool(String name, boolean value) {
json.set(name, value ? new JsonTrue() : new JsonFalse());
}
/**
* Set integer value
* @param name
* @param value
*/
public void setInt(String name, int value) {
json.set(name, new JsonNumber("" + value));
}
/**
* Set double value
* @param name
* @param value
*/
public void setDouble(String name, double value) {
json.set(name, new JsonNumber("" + value));
}
/**
* Remove a setting
* @param name
*/
public void removeSetting(String name) {
for (int i = 0; i < json.getNumMember(); ++i) {
if (json.getMember(i).getName().equals(name)) {
json.getMemberList().removeChild(i);
break;
}
}
}
/**
* @param name
* @return <code>true</code> if the property map contains a property of
* the given name
*/
public boolean containsKey(String name) {
for (int i = 0; i < json.getNumMember(); ++i) {
if (json.getMember(i).getName().equals(name)) {
return true;
}
}
return false;
}
}