// Copyright 2004, 2005 The Apache Software Foundation
//
// Licensed 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.tapestry.pageload;
import java.util.Collection;
import java.util.Iterator;
import org.apache.tapestry.IComponent;
import org.apache.tapestry.Tapestry;
/**
* Walks through the tree of components and invokes the visitors on each of
* of the components in the tree.
*
* @author mindbridge
* @since 3.0
*/
public class ComponentTreeWalker
{
private IComponentVisitor[] _visitors;
public ComponentTreeWalker(IComponentVisitor[] visitors)
{
_visitors = visitors;
}
public void walkComponentTree(IComponent component)
{
// Invoke visitors
for (int i = 0; i < _visitors.length; i++)
{
IComponentVisitor visitor = _visitors[i];
visitor.visitComponent(component);
}
// Recurse into the embedded components
Collection components = component.getComponents().values();
if (Tapestry.size(components) == 0)
return;
for (Iterator it = components.iterator(); it.hasNext();)
{
IComponent embedded = (IComponent) it.next();
walkComponentTree(embedded);
}
}
}