/**
* ===========================================
* 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: ResolverFactory.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.resolver;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.LibLayoutBoot;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.StyleKeyRegistry;
import org.jfree.layouting.input.style.values.CSSAutoValue;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.context.LayoutContext;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.util.Configuration;
import org.jfree.util.Log;
import org.jfree.util.ObjectUtilities;
/**
* Creation-Date: 11.12.2005, 14:40:17
*
* @author Thomas Morgner
*/
public class ResolverFactory
{
private static final String AUTO_PREFIX = "org.jfree.layouting.resolver.auto.";
private static final String COMPUTED_PREFIX = "org.jfree.layouting.resolver.computed.";
private static final String PERCENTAGE_PREFIX = "org.jfree.layouting.resolver.percentages.";
private static ResolverFactory factory;
public static synchronized ResolverFactory getInstance()
{
if (factory == null)
{
factory = new ResolverFactory();
factory.registerDefaults();
}
return factory;
}
private ResolveHandlerModule[] handlers;
private StyleKeyRegistry registry;
private ResolverFactory()
{
handlers = null;
registry = StyleKeyRegistry.getRegistry();
}
public void registerDefaults()
{
final ArrayList handlerList = new ArrayList();
final HashMap autoHandlers = loadModules(AUTO_PREFIX);
final HashMap compHandlers = loadModules(COMPUTED_PREFIX);
final HashMap percHandlers = loadModules(PERCENTAGE_PREFIX);
final HashSet keys = new HashSet();
keys.addAll(autoHandlers.keySet());
keys.addAll(compHandlers.keySet());
keys.addAll(percHandlers.keySet());
for (Iterator iterator = keys.iterator(); iterator.hasNext();)
{
final StyleKey key = (StyleKey) iterator.next();
final ResolveHandler autoHandler = (ResolveHandler) autoHandlers.get(key);
final ResolveHandler compHandler = (ResolveHandler) compHandlers.get(key);
final ResolveHandler percHandler = (ResolveHandler) percHandlers.get(key);
handlerList.add(new ResolveHandlerModule(key, autoHandler, compHandler,
percHandler));
}
handlers = (ResolveHandlerModule[]) handlerList.toArray
(new ResolveHandlerModule[handlerList.size()]);
handlers = ResolveHandlerSorter.sort(handlers);
// for (int i = 0; i < handlers.length; i++)
// {
// ResolveHandlerModule handler = handlers[i];
// Log.debug("Registered sorted handler (" + handler.getWeight() + ") " + handler.getKey());
//
// }
// Log.debug("Registered " + handlers.length + " modules.");
}
private HashMap loadModules(final String configPrefix)
{
final HashMap handlers = new HashMap();
final Configuration config = LibLayoutBoot.getInstance().getGlobalConfig();
final Iterator sit = config.findPropertyKeys(configPrefix);
final int length = configPrefix.length();
while (sit.hasNext())
{
final String configkey = (String) sit.next();
final String name = configkey.substring(length).toLowerCase();
final StyleKey key = registry.findKeyByName(name);
if (key == null)
{
Log.warn("Invalid stylekey for resolver: " + name);
continue;
}
final String c = config.getConfigProperty(configkey);
final ResolveHandler module = (ResolveHandler)
ObjectUtilities.loadAndInstantiate(c, ResolverFactory.class, ResolveHandler.class);
if (module != null)
{
//Log.info("Loaded resolver: " + name + " (" + module + ")");
handlers.put(key, module);
}
else
{
Log.warn("Invalid resolver implementation: " + c);
}
}
return handlers;
}
public void performResolve(final LayoutProcess process,
final LayoutElement node)
{
final LayoutContext layoutContext = node.getLayoutContext();
for (int i = 0; i < handlers.length; i++)
{
final ResolveHandlerModule handler = handlers[i];
final StyleKey key = handler.getKey();
final CSSValue value = layoutContext.getValue(key);
final ResolveHandler autoValueHandler = handler.getAutoValueHandler();
if (autoValueHandler != null)
{
if (value instanceof CSSAutoValue)
{
autoValueHandler.resolve(process, node, key);
}
}
final ResolveHandler compValueHandler = handler.getComputedValueHandler();
if (compValueHandler != null)
{
compValueHandler.resolve(process, node, key);
}
final ResolveHandler percValueHandler = handler.getPercentagesValueHandler();
if (percValueHandler != null)
{
percValueHandler.resolve(process, node, key);
}
}
}
}