src/main/java/freemarker/core/FreeMarkerTree.java

/*
 * 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 freemarker.core;

import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;

import freemarker.template.Template;

/**
 * Allows exposure of a FreeMarker template's AST as a Swing tree.
 * 
 * @deprecated Will be removed, as Swing classes aren't accessible on Google App Engine.
 */
@Deprecated
public class FreeMarkerTree extends JTree {

    public FreeMarkerTree(Template template) {
        super(template.getRootTreeNode());
    }

    public void setTemplate(Template template) {
        this.setModel(new DefaultTreeModel(template.getRootTreeNode()));
        this.invalidate();
    }

    @Override
    public String convertValueToText(Object value, boolean selected,
                                     boolean expanded, boolean leaf, int row,
                                     boolean hasFocus) {
        if (value instanceof TemplateElement) {
            return ((TemplateElement) value).getDescription();
        }
        return value.toString();
    }
    
}