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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import net.sf.jasperreports.engine.JRRuntimeException;
/**
*
* @author Lucian Chirita ([email protected])
*/
public class DefaultedMessageProvider implements MessageProvider
{
private static final Log log = LogFactory.getLog(DefaultedMessageProvider.class);
public static MessageProvider wrap(MessageProvider wrapped, String defaultsResource)
{
Properties defaults = loadResourceProperties(defaultsResource);
return defaults == null ? wrapped : new DefaultedMessageProvider(wrapped, defaults);
}
protected static Properties loadResourceProperties(String defaultsResource)
{
InputStream in = JRLoader.getResourceInputStream(defaultsResource);
Properties defaults = null;
if (in != null)
{
try
{
defaults = new Properties();
defaults.load(in);
}
catch (IOException e)
{
throw new JRRuntimeException(e);
}
finally
{
try
{
in.close();
}
catch (IOException e)
{
log.debug("Failed to close stream for " + defaultsResource, e);
}
}
}
else
{
if (log.isDebugEnabled())
{
log.debug("Did not find default messages resource " + defaultsResource);
}
}
return defaults;
}
private final MessageProvider wrapped;
private final Properties defaultsMessages;
public DefaultedMessageProvider(MessageProvider wrapped, Properties defaultsMessages)
{
this.defaultsMessages = defaultsMessages;
this.wrapped = wrapped;
}
@Override
public String getMessage(String code, Object[] args, Locale locale)
{
String message;
try
{
message = wrapped.getMessage(code, args, locale);
}
catch (MissingResourceException e)//FIXME add a JR exception type?
{
message = defaultsMessages.getProperty(code);//not applying args for now
if (message == null && log.isDebugEnabled())
{
log.debug("Message not found for " + code);
//returning null
}
}
return message;
}
}