/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: FunctionFactory.java 6653 2008-12-02 14:53:40Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.functions;
import java.util.HashMap;
import java.util.Iterator;
import org.jfree.layouting.LibLayoutBoot;
import org.jfree.layouting.layouter.style.functions.content.ContentFunction;
import org.jfree.layouting.layouter.style.functions.values.StyleValueFunction;
import org.pentaho.reporting.libraries.base.config.Configuration;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.base.util.DebugLog;
/**
* Creation-Date: 16.04.2006, 14:15:37
*
* @author Thomas Morgner
*/
public class FunctionFactory
{
public static final String VALUE_FUNCTIONS_KEY_RANGE =
"org.jfree.layouting.functions.values.";
public static final String CONTENT_FUNCTIONS_KEY_RANGE =
"org.jfree.layouting.functions.content.";
private HashMap styleFunctions;
private HashMap contentFunctions;
private static FunctionFactory instance;
public static FunctionFactory getInstance()
{
if (instance == null)
{
instance = new FunctionFactory();
instance.registerDefault();
}
return instance;
}
private FunctionFactory()
{
styleFunctions = new HashMap();
contentFunctions = new HashMap();
}
public void registerDefault ()
{
final Configuration config = LibLayoutBoot.getInstance().getGlobalConfig();
final Iterator valueKeys = config.findPropertyKeys(VALUE_FUNCTIONS_KEY_RANGE);
while (valueKeys.hasNext())
{
final String key = (String) valueKeys.next();
final String value = config.getConfigProperty(key);
final String name = key.substring(VALUE_FUNCTIONS_KEY_RANGE.length());
final Object maybeFunction = ObjectUtilities.loadAndInstantiate
(value, FunctionFactory.class, StyleValueFunction.class);
if (maybeFunction instanceof StyleValueFunction)
{
styleFunctions.put (name.toLowerCase(), maybeFunction);
}
}
final Iterator contentKeys = config.findPropertyKeys(CONTENT_FUNCTIONS_KEY_RANGE);
while (contentKeys.hasNext())
{
final String key = (String) contentKeys.next();
final String value = config.getConfigProperty(key);
final String name = key.substring(CONTENT_FUNCTIONS_KEY_RANGE.length());
final Object maybeFunction = ObjectUtilities.loadAndInstantiate
(value, FunctionFactory.class, ContentFunction.class);
if (maybeFunction instanceof ContentFunction)
{
contentFunctions.put (name.toLowerCase(), maybeFunction);
}
}
}
public StyleValueFunction getStyleFunction (final String name)
{
final StyleValueFunction function = (StyleValueFunction) styleFunctions.get(name.toLowerCase());
if (function == null)
{
DebugLog.log("Unrecognized style function encountered: " + name);
}
// todo: Check for null values in all callers ..
return function;
}
public ContentFunction getContentFunction (final String name)
{
final ContentFunction function = (ContentFunction) contentFunctions.get(name.toLowerCase());
if (function == null)
{
DebugLog.log("Unrecognized content function encountered: " + name);
}
// todo: Check for null values in all callers ..
return function;
}
}