com.mchange.v2.util.PropertiesUtils Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v2.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
public final class PropertiesUtils
{
public static int getIntProperty( Properties props, String name, int dflt ) throws NumberFormatException
{
String unparsed = props.getProperty( name );
return ( unparsed != null ? Integer.parseInt( unparsed ) : dflt );
}
public static Properties fromString(String propsString, String encoding) throws UnsupportedEncodingException
{
try
{
Properties out = new Properties();
if ( propsString != null )
{
byte[] bytes = propsString.getBytes( encoding );
out.load( new ByteArrayInputStream( bytes ) );
}
return out;
}
catch (UnsupportedEncodingException e)
{ throw e; }
catch (IOException e)
{ throw new Error("Huh? An IOException while working with byte array streams?!", e); }
}
public static Properties fromString(String propsString)
{
try { return fromString( propsString, "ISO-8859-1" ); }
catch (UnsupportedEncodingException e)
{ throw new Error("Huh? An ISO-8859-1 is an unsupported encoding?!", e); }
}
public static String toString(Properties props, String comment, String encoding) throws UnsupportedEncodingException
{
try
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
props.store( baos, comment);
baos.flush(); //superfluous but I feel better...
return new String( baos.toByteArray(), encoding );
}
catch (UnsupportedEncodingException e)
{ throw e; }
catch (IOException e)
{ throw new Error("Huh? An IOException while working with byte array streams?!", e); }
}
public static String toString(Properties props, String comment)
{
try { return toString( props, comment, "ISO-8859-1" ); }
catch (UnsupportedEncodingException e)
{ throw new Error("Huh? An ISO-8859-1 is an unsupported encoding?!", e); }
}
private PropertiesUtils()
{}
}