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JSF components and utilities that can be used with any JSF implementation.
This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build
changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this
version of the Tomahawk library.
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.custom.navmenu;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.myfaces.component.UserRoleUtils;
import javax.faces.component.UIComponent;
import javax.faces.component.UISelectItems;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* @author Thomas Spiegl (latest modification by $Author: grantsmith $)
* @version $Revision: 472638 $ $Date: 2006-11-08 15:54:13 -0500 (Wed, 08 Nov 2006) $
*/
public class NavigationMenuUtils
{
private static final Log log = LogFactory.getLog(NavigationMenuUtils.class);
public static List getNavigationMenuItemList(UIComponent uiComponent)
{
List list = new ArrayList(uiComponent.getChildCount());
for (Iterator children = uiComponent.getChildren().iterator(); children.hasNext(); )
{
UIComponent child = (UIComponent)children.next();
if (child instanceof UINavigationMenuItem)
{
NavigationMenuItem item;
Object value = ((UINavigationMenuItem)child).getValue();
if (value != null)
{
//get NavigationMenuItem from model via value binding
if (!(value instanceof NavigationMenuItem))
{
FacesContext facesContext = FacesContext.getCurrentInstance();
throw new IllegalArgumentException("Value binding of UINavigationMenuItem with id " + child.getClientId(facesContext) + " does not reference an Object of type NavigationMenuItem");
}
item = (NavigationMenuItem)value;
}
else
{
UINavigationMenuItem uiItem = (UINavigationMenuItem)child;
String itemLabel = uiItem.getItemLabel();
Object itemValue = uiItem.getItemValue();
if (itemValue == null) itemValue = "";
if (itemLabel == null)
{
itemLabel = itemValue.toString();
}
String actionStr = null;
MethodBinding action = uiItem.getAction();
if (action != null)
{
if (action.getExpressionString() != null)
{
actionStr = action.getExpressionString();
}
else
{
actionStr = action.toString();
}
}
item = new NavigationMenuItem(itemValue,
itemLabel,
uiItem.getItemDescription(),
uiItem.isItemDisabled() || ! UserRoleUtils.isEnabledOnUserRole(uiItem),
uiItem.isRendered(),
actionStr,
uiItem.getIcon(),
uiItem.isSplit());
if (uiItem.getActionListener() != null)
item.setActionListener(uiItem.getActionListener().getExpressionString());
}
list.add(item);
if (child.getChildCount() > 0)
{
List l = getNavigationMenuItemList(child);
item.setNavigationMenuItems((NavigationMenuItem[]) l.toArray(new NavigationMenuItem[l.size()]));
}
}
else if (child instanceof UISelectItems)
{
addNavigationMenuItems((UISelectItems) child, list);
}
else
{
FacesContext facesContext = FacesContext.getCurrentInstance();
log.error("Invalid child with id " + child.getClientId(facesContext) + "of component with id : "+uiComponent.getClientId(facesContext)
+" : must be UINavigationMenuItem or UINavigationMenuItems, is of type : "+((child==null)?"null":child.getClass().getName()));
}
}
return list;
}
public static void addNavigationMenuItems(UISelectItems child, List list)
{
Object value = child.getValue();
if (value == null)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
throw new NullPointerException("Value binding of UINavigationMenuItems with id " + child.getClientId(facesContext) + " is null");
}
if (value instanceof NavigationMenuItem)
{
list.add(value);
}
else if (value instanceof NavigationMenuItem[])
{
for (int i = 0; i < ((NavigationMenuItem[])value).length; i++)
{
list.add(((NavigationMenuItem[])value)[i]);
}
}
else if (value instanceof Collection)
{
for (Iterator it = ((Collection)value).iterator(); it.hasNext();)
{
Object item = it.next();
if (!(item instanceof NavigationMenuItem))
{
FacesContext facesContext = FacesContext.getCurrentInstance();
throw new IllegalArgumentException("Collection referenced by UINavigationMenuItems with id " + child.getClientId(facesContext) + " does not contain Objects of type NavigationMenuItem");
}
list.add(item);
}
}
else
{
FacesContext facesContext = FacesContext.getCurrentInstance();
throw new IllegalArgumentException("Value binding of UINavigationMenuItems with id " + child.getClientId(facesContext) + " does not reference an Object of type NavigationMenuItem, NavigationMenuItem[], Collection or Map");
}
}
/**
* Return true if the specified string contains an EL expression.
*
* This is taken almost verbatim from {@link javax.faces.webapp.UIComponentTag}
* in order to remove JSP dependencies from the renderers.
*/
public static boolean isValueReference(String value)
{
if (value == null) return false;
int start = value.indexOf("#{");
if (start < 0) return false;
int end = value.lastIndexOf('}');
return (end >=0 && start < end);
}
}