001/*
002 * (C) Copyright 2006-2008 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.webengine.ui.tree;
023
024import java.io.Serializable;
025
026import org.nuxeo.common.utils.Path;
027
028/**
029 * A tree view manage a tree structure of items. The tree data is lazy loaded by using the data provider specified at
030 * tree view creation.
031 *
032 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
033 */
034public interface TreeModel extends Serializable {
035
036    /**
037     * Gets the content provider used by this tree.
038     */
039    ContentProvider getContentProvider();
040
041    /**
042     * Sets the content provider to be used by this tree.
043     */
044    void setContentProvider(ContentProvider provider);
045
046    /**
047     * Sets the input data.
048     *
049     * @param input (may be null)
050     */
051    void setInput(Object input);
052
053    /**
054     * Gets the current input of the tree.
055     *
056     * @return the tree input data. may be null.
057     */
058    Object getInput();
059
060    /**
061     * Get the tree root item, or null if tree has no input.
062     *
063     * @return the root
064     */
065    TreeItem getRoot();
066
067    /**
068     * Find the item at the given path. Only loaded items are searched. This operation will not load any extra item.
069     *
070     * @param path the path to search
071     * @return the item at the given path or null if none
072     */
073    TreeItem find(String path);
074
075    /**
076     * Find and item given it's path and expand parents if needed. The returned item is not explicitly expanded so it
077     * may be collapsed or its children if any not yet loaded
078     *
079     * @param path the path to search
080     * @return the item or null if none
081     */
082    TreeItem findAndReveal(String path);
083
084    /**
085     * Like {@link #find(String)} but the path is expressed as a {@link Path} object.
086     *
087     * @see #find(String)
088     */
089    TreeItem find(Path path);
090
091    /**
092     * Like {@link #findAndReveal(String)} but the path is expressed as a {@link Path} object.
093     *
094     * @see #findAndReveal(String)
095     */
096    TreeItem findAndReveal(Path path);
097
098}