/*
* 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.wicket.extensions.breadcrumb.panel;
import java.lang.reflect.Constructor;
import org.apache.wicket.extensions.breadcrumb.IBreadCrumbModel;
import org.apache.wicket.util.lang.Args;
/**
* Simple factory that creates instances of a {@link BreadCrumbPanel bread crumb panel} based on the
* class it is constructed with.
*
* @author Eelco Hillenius
*/
public final class BreadCrumbPanelFactory implements IBreadCrumbPanelFactory
{
private static final long serialVersionUID = 1L;
/** Class to construct. */
private final Class<? extends BreadCrumbPanel> panelClass;
/**
* Construct.
*
* @param panelClass
* The class to use for creating instances. Must be of type {@link BreadCrumbPanel},
* and must have constructor
* {@link BreadCrumbPanel#BreadCrumbPanel(String, IBreadCrumbModel)}
*/
public BreadCrumbPanelFactory(final Class<? extends BreadCrumbPanel> panelClass)
{
Args.notNull(panelClass, "panelClass");
if (!BreadCrumbPanel.class.isAssignableFrom(panelClass))
{
throw new IllegalArgumentException("argument panelClass (" + panelClass +
") must extend class " + BreadCrumbPanel.class.getName());
}
this.panelClass = panelClass;
// check whether it has the proper constructor
getConstructor();
}
/**
* @see org.apache.wicket.extensions.breadcrumb.panel.IBreadCrumbPanelFactory#create(java.lang.String,
* org.apache.wicket.extensions.breadcrumb.IBreadCrumbModel)
*/
@Override
public final BreadCrumbPanel create(final String componentId,
final IBreadCrumbModel breadCrumbModel)
{
Constructor<? extends BreadCrumbPanel> ctor = getConstructor();
try
{
return ctor.newInstance(componentId, breadCrumbModel);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
/**
* Gets the proper constructor of the panel class.
*
* @return The constructor.
*/
private Constructor<? extends BreadCrumbPanel> getConstructor()
{
try
{
return panelClass.getConstructor(String.class, IBreadCrumbModel.class);
}
catch (SecurityException e)
{
throw new RuntimeException(e);
}
catch (NoSuchMethodException e)
{
throw new RuntimeException(e);
}
}
}