/**
* 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.isis.viewer.wicket.model.models;
import org.apache.wicket.Component;
import org.apache.wicket.Page;
import org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor;
import org.apache.wicket.util.visit.IVisit;
public class WicketComponentUtils {
public WicketComponentUtils(){}
/**
* Locates a component implementing the required class on the same page as the supplied component.
*/
public static <T> T getFrom(Component component, final Class<T> cls) {
return getFrom(component.getPage(), cls);
}
/**
* Locates a component implementing the required class on the supplied page.
*/
public static <T> T getFrom(Page page, final Class<T> cls) {
final Object[] pComponent = new Object[1];
page.visitChildren(new DeepChildFirstVisitor() {
@Override
public void component(Component component, IVisit<Void> visit) {
if(cls.isAssignableFrom(component.getClass())) {
pComponent[0] = component;
visit.stop();
}
}
@Override
public boolean preCheck(Component component) {
return false;
}
});
return (T) pComponent[0];
}
}