/*
* 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.tree.taglib;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.servlet.jsp.JspException;
import org.apache.myfaces.custom.tree.HtmlTree;
import org.apache.myfaces.custom.tree.model.DefaultTreeModel;
import org.apache.myfaces.custom.tree.model.TreeModel;
import org.apache.myfaces.custom.tree.model.TreePath;
import org.apache.myfaces.shared_tomahawk.taglib.html.HtmlPanelGroupTag;
/**
* <p>
* HtmlTree tag.
* </p>
* @since 1.1.7
* @author <a href="mailto:oliver@rossmueller.com">Oliver Rossmueller </a>
* @version $Revision: 746345 $ $Date: 2004/10/13 11:50:58
*/
public class AbstractTreeTag extends HtmlPanelGroupTag {
private String value;
private String expandRoot;
public String getComponentType() {
return "org.apache.myfaces.HtmlTree";
}
public String getRendererType() {
return "org.apache.myfaces.HtmlTree";
}
public String getValue() {
return value;
}
public void setValue(String newValue) {
value = newValue;
}
public String isExpandRoot() {
return expandRoot;
}
public void setExpandRoot(String expandRoot) {
this.expandRoot = expandRoot;
}
/**
* Obtain tree model or create a default model.
*/
public int doStartTag() throws JspException {
FacesContext context = FacesContext.getCurrentInstance();
if (value != null) {
ValueBinding valueBinding = context.getApplication()
.createValueBinding(value);
TreeModel treeModel = (TreeModel) (valueBinding.getValue(context));
if (treeModel == null) {
// create default model
treeModel = new DefaultTreeModel();
valueBinding.setValue(context, treeModel);
}
}
int answer = super.doStartTag();
HtmlTree tree = (HtmlTree) getComponentInstance();
if (getCreated() && Boolean.parseBoolean(expandRoot)) {
// component was created, so expand the root node
TreeModel model = tree.getModel(context);
if (model != null) {
tree.expandPath(new TreePath(new Object[] { model.getRoot() }),
context);
}
}
tree.addToModelListeners();
return answer;
}
public void release() {
super.release();
value = null;
expandRoot = null;
}
/**
* Applies attributes to the tree component
*/
protected void setProperties(UIComponent component) {
super.setProperties(component);
FacesContext context = FacesContext.getCurrentInstance();
if (value != null) {
if (isValueReference(value)) {
ValueBinding binding = context.getApplication()
.createValueBinding(value);
component.setValueBinding("model", binding);
}
} else {
ValueBinding binding = component.getValueBinding("model");
if (binding == null) {
binding = context.getApplication().createValueBinding(
"#{sessionScope.tree}");
}
component.setValueBinding("model", binding);
}
}
}