src/plugins/db.core/src/com/motorolamobility/studio/android/db/core/ui/ITreeNode.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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 com.motorolamobility.studio.android.db.core.ui;

import java.util.List;
import java.util.regex.Pattern;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IActionFilter;

/**
 *  This interface represents a db tree node.
 */
public interface ITreeNode extends IActionFilter
{

    /**
     * Method responsible to reload the node itself and its children 
     */
    void refresh();

    /**
     * Get parent of the tree node
     * @return null if it is the tree root, non-null if is a child node
     */
    ITreeNode getParent();

    /**
     * @param parent null if it is the tree root, non-null if is a child node
     */
    void setParent(ITreeNode parent);

    /**
     * Retrieves list of children (without any filter)
     * @return collection of {@link AbstractTreeNode} that are child of this abstract tree node  
     */
    List<ITreeNode> getChildren();

    /**
     * Clear the children (e.g. before reloading again)
     */
    void clear();

    /**
     * Retrieve the child for the given node index 
     * @param index 
     * @return {@link AbstractTreeNode} if child with the given index was found, null if node not found as a child  
     */
    ITreeNode getChild(int index);

    /**
     * Retrieve the child for the given node ID 
     * @param id node ID as specified in the extension point com.motorolamobility.studio.android.db.core.dbRootNode
     * @return {@link AbstractTreeNode} if child with the given ID was found, null if node not found as a child  
     */
    ITreeNode getChildById(String id);

    /**
     * Get list of children nodes that matches a regular expression 
     * @param regex regular expression to filter nodes, see {@link Pattern} for the constructs
     * if null, returns all items
     * @return list of {@link AbstractTreeNode} that matches the view filter
     */
    List<ITreeNode> getFilteredChildren(String regex);

    void putChild(ITreeNode treeNode);

    void putChildren(List<ITreeNode> childrenList);

    /**
     * Remove a child with the given node
     * @param node
     */
    void removeChild(ITreeNode node);

    /**
     * @return true if node is getting data to be added in the tree, false otherwise 
     */
    boolean isLoading();

    /**
     * @param isLoading true if node is getting data to be added in the tree, false otherwise 
     */
    void setLoading(boolean isLoading);

    /**
     * @return the id
     */
    String getId();

    /**
     * @param id the id to set
     */
    void setId(String id);

    /**
     * @return the name
     */
    String getName();

    /**
     * @param name the name to set
     */
    void setName(String name);

    /**
     * @return the icon
     */
    ImageDescriptor getIcon();

    /**
     * @param icon the icon to set
     */
    void setIcon(ImageDescriptor icon);

    /**
     * @return the canRefresh
     */
    IStatus canRefresh();

    /**
     * @return true if it does not accept a child, false otherwise
     */
    boolean isLeaf();

    /**
     * Refreshes this node in a background task
     * @param canRefreshInput 
     */
    void refreshAsync();

    /**
     * Refreshes this node in a background task.
     * @param canRefreshInput is an optional parameter, is intended to be set used by refresh handler. 
     */
    void refreshAsync(boolean canRefreshYesResponse);

    /**
     * Clean method is intended to be called right before removing this node from it's parent.
     * All resource cleaning must be done in this method.
     */
    void cleanUp();

    /**
     * Set the node Status, allowing the tree to decorate itself on errors.
     * Is status is ERROR the icon will be decorated with a error image and tooltip will be replaced by status.getMessage() if available.
     * @param status
     */
    void setNodeStatus(IStatus status);

    /**
     * Retrieves the current node status.
     * @return
     */
    IStatus getNodeStatus();

    /**
     * Set the tooltip to be displayed for this node.
     * @param tooltip
     */
    void setTooltip(String tooltip);

    /**
     * @return this node tooltip text
     */
    String getTooltip();

}