/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.filter.types;
import java.util.Locale;
import java.util.ResourceBundle;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.ResourceBundleFactory;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementType;
import org.pentaho.reporting.engine.classic.core.metadata.ElementTypeRegistry;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class ResourceLabelType implements ElementType
{
private static final Log logger = LogFactory.getLog(ResourceLabelType.class);
public static final ResourceLabelType INSTANCE = new ResourceLabelType();
private transient ElementMetaData elementType;
public ResourceLabelType()
{
}
public ElementMetaData getMetaData()
{
if (elementType == null)
{
elementType = ElementTypeRegistry.getInstance().getElementType("resource-label");
}
return elementType;
}
public Object getDesignValue(final ExpressionRuntime runtime, final Element element)
{
final Object resourceKeyRaw = ElementTypeUtils.queryStaticValue(element);
final String resourceKey = resourceKeyRaw == null ? "<null>" : resourceKeyRaw.toString();
return resourceKey;
}
/**
* Returns the current value for the data source.
*
* @param runtime the expression runtime that is used to evaluate formulas and expressions when computing the value of
* this filter.
* @param element the element from which to read attribute.
* @return the value.
*/
public Object getValue(final ExpressionRuntime runtime, final Element element)
{
if (runtime == null)
{
throw new NullPointerException("Runtime must never be null.");
}
if (element == null)
{
throw new NullPointerException("Element must never be null.");
}
final Object resourceKeyRaw = ElementTypeUtils.queryStaticValue(element);
if (resourceKeyRaw == null)
{
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
final String resourceKey = String.valueOf(resourceKeyRaw);
final String resourceId = ElementTypeUtils.queryResourceId(runtime, element);
if (resourceId == null)
{
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
try
{
final ResourceBundleFactory resourceBundleFactory = runtime.getResourceBundleFactory();
final ResourceBundle bundle = resourceBundleFactory.getResourceBundle(resourceId);
if (bundle != null)
{
return bundle.getString(resourceKey);
}
}
catch (Exception e)
{
// on errors return null.
ResourceLabelType.logger.warn
("Failed to retrive the value for resource-bundle " + resourceId + " with key " + resourceKey);
}
return element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
}
/**
* Clones this <code>DataSource</code>.
*
* @return the clone.
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone() throws CloneNotSupportedException
{
return super.clone();
}
public void configureDesignTimeDefaults(final Element element, final Locale locale)
{
}
}