tapestry/tapestry-examples/Workbench/src/java/org/apache/tapestry/workbench/tree/examples/FileSystemTree.java

// 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.workbench.tree.examples;

import java.io.File;
import java.util.Collection;
import java.util.Date;

import org.apache.tapestry.annotations.InjectObject;
import org.apache.tapestry.contrib.tree.components.INodeRenderFactory;
import org.apache.tapestry.contrib.tree.components.TreeView;
import org.apache.tapestry.contrib.tree.model.ITreeDataModel;
import org.apache.tapestry.contrib.tree.model.ITreeModel;
import org.apache.tapestry.contrib.tree.model.ITreeNode;
import org.apache.tapestry.contrib.tree.model.ITreeSessionStateManager;
import org.apache.tapestry.contrib.tree.model.ITreeStateListener;
import org.apache.tapestry.contrib.tree.model.ITreeStateModel;
import org.apache.tapestry.contrib.tree.model.TreeStateEvent;
import org.apache.tapestry.contrib.tree.simple.SimpleTreeModel;
import org.apache.tapestry.engine.IEngineService;
import org.apache.tapestry.event.PageDetachListener;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.html.BasePage;
import org.apache.tapestry.workbench.tree.examples.fsmodel.FileSystem;
import org.apache.tapestry.workbench.tree.examples.fsmodel.FileSystemDataModel;
import org.apache.tapestry.workbench.tree.examples.fsmodel.FileSystemStateManager;
import org.apache.tapestry.workbench.tree.examples.fsmodel.FolderObject;
import org.apache.tapestry.workbench.tree.examples.fsmodel.NodeRenderFactory;

/**
 * 
 * @author ceco
 */
public abstract class FileSystemTree extends BasePage implements
        ISelectedFolderSource, ITreeStateListener, PageDetachListener
{

    private ITreeSessionStateManager m_objTreeSessionStateManager = null;

    private ITreeDataModel m_objDataModel;

    private ITreeModel m_objModel;

    private Object m_objValue;

    @InjectObject("engine-service:asset")
    public abstract IEngineService getAssetService();

    /**
     * Injected.
     * 
     * @since 4.0
     */
    public abstract String getTreeRootDir();

    public void pageDetached(PageEvent event)
    {
        m_objDataModel = null;
        m_objValue = null;
        m_objTreeSessionStateManager = null;
    }

    public void initTableModel()
    {
        ITreeNode objParent;

        String strRootDir = getTreeRootDir();

        System.out.println("strRootDir = " + strRootDir);

        if (strRootDir == null || "".equals(strRootDir))
        {
            objParent = new FileSystem(getAssetService());
        }
        else
        {
            FolderObject objFolder = new FolderObject(null,
                    new File(strRootDir), true, getAssetService());
            objFolder.reload();
            objParent = objFolder;
        }

        m_objDataModel = new FileSystemDataModel(objParent);
        m_objModel = new SimpleTreeModel(m_objDataModel);
    }

    public Date getCurrentTime()
    {
        return new Date();
    }

    public ITreeModel getTreeModel()
    {
        if (m_objDataModel == null)
        {
            initTableModel();
        }
        return m_objModel;
    }

    /**
     * Returns the value.
     * 
     * @return Object
     */
    public Object getValue()
    {
        return m_objValue;
    }

    /**
     * Sets the value.
     * 
     * @param value
     *            The value to set
     */
    public void setValue(Object value)
    {
        m_objValue = value;
    }

    public INodeRenderFactory getRenderFactory()
    {
        return new NodeRenderFactory();
    }

    public ITreeSessionStateManager getSessionStateManager()
    {
        // IPage objPage =
        // getRequestCycle().getPage("contrib:TreeNodeViewPage");
        // System.out.println("TreeNodeViewPage NamespaceId :
        // "+objPage.getNamespace().getNamespaceId());

        if (m_objTreeSessionStateManager == null)
        {
            String strRootDir = getTreeRootDir();
            // System.out.println("strRootDir = " + strRootDir);

            m_objTreeSessionStateManager = new FileSystemStateManager(
                    strRootDir, getAssetService());
        }
        return m_objTreeSessionStateManager;
    }

    /**
     * @see org.apache.tapestry.workbench.tree.examples.ISelectedFolderSource#getSelectedFolderChildren()
     */
    public Collection getSelectedFolderChildren()
    {
        TreeView objTreeView = (TreeView) getComponent("treeView");
        ITreeStateModel objTreeStateModel = objTreeView.getTreeModel()
                .getTreeStateModel();
        Object objSelectedNodeUID = objTreeStateModel.getSelectedNode();
        ITreeNode objSelectedNode = null;
        if (objSelectedNodeUID != null)
            objSelectedNode = (ITreeNode) getTreeModel().getTreeDataModel()
                    .getObject(objSelectedNodeUID);
        else
        {
            objSelectedNode = (ITreeNode) getTreeModel().getTreeDataModel()
                    .getRoot();
        }
        return objSelectedNode.getChildren();
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeStateListener#treeStateChanged(org.apache.tapestry.contrib.tree.model.TreeStateEvent)
     */
    public void treeStateChanged(TreeStateEvent objEvent)
    {
        DirectoryTableView objDirectoryTableView = (DirectoryTableView) getComponent("directoryTableView");
        objDirectoryTableView.resetState();
    }

    public ITreeStateListener getTreeStateListener()
    {
        return this;
    }

    public ISelectedFolderSource getSelectedFolderSource()
    {
        return this;
    }

    /**
     * @see org.apache.tapestry.workbench.tree.examples.ISelectedFolderSource#getSelectedNodeName()
     */
    public String getSelectedNodeName()
    {
        TreeView objTreeView = (TreeView) getComponent("treeView");
        ITreeStateModel objTreeStateModel = objTreeView.getTreeModel()
                .getTreeStateModel();
        Object objSelectedNodeUID = objTreeStateModel.getSelectedNode();
        ITreeNode objSelectedNode = null;
        if (objSelectedNodeUID != null)
            objSelectedNode = (ITreeNode) getTreeModel().getTreeDataModel()
                    .getObject(objSelectedNodeUID);
        else
        {
            objSelectedNode = (ITreeNode) getTreeModel().getTreeDataModel()
                    .getRoot();
        }
        return objSelectedNode.toString();
    }

}