tapestry/tapestry-examples/Workbench/src/java/org/apache/tapestry/workbench/tree/examples/fsmodel/FileSystem.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.fsmodel;

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

import org.apache.tapestry.contrib.tree.model.ITreeNode;
import org.apache.tapestry.engine.IEngineService;

/**
 * 
 */
public class FileSystem implements IFileSystemTreeNode
{

    /**
     * 
     */
    private static final long serialVersionUID = -3895257178984217762L;

    private transient AssetsHolder m_objAssetsHolder = null;

    /**
     * @associates <{Drive}>
     * @supplierCardinality 0..*
     */
    private Vector m_vDrives;

    private final IEngineService _assetService;

    public FileSystem(IEngineService assetService)
    {
        _assetService = assetService;
    }

    private void initDrives()
    {
        m_vDrives = new Vector();
        File[] arrFile = File.listRoots();

        if (arrFile != null)
            for (int i = 0; i < arrFile.length; i++)
            {
                File objFile = arrFile[i];
                boolean bFloppy = objFile.getAbsolutePath().startsWith("A:")
                        || objFile.getAbsolutePath().startsWith("B:");
                if (!bFloppy)
                    m_vDrives.addElement(new Drive(this, objFile, _assetService));
            }
    }

    public Vector getDrives()
    {
        if (m_vDrives == null)
        {
            initDrives();
        }
        return m_vDrives;
    }

    public int getChildNumber(Object objChild)
    {
        for (int i = 0; i < m_vDrives.size(); i++)
        {
            Object objChildDrive = m_vDrives.elementAt(i);
            if (objChildDrive.equals(objChild))
            {
                return i;
            }
        }
        return -1;
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#containsChild(ITreeNode)
     */
    public boolean containsChild(ITreeNode node)
    {
        return true;
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#getAllowsChildren()
     */
    public boolean getAllowsChildren()
    {
        return true;
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#getChildCount()
     */
    public int getChildCount()
    {
        return getDrives().size();
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#getChildren()
     */
    public Collection getChildren()
    {
        return getDrives();
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#getParent()
     */
    public ITreeNode getParent()
    {
        return null;
    }

    /**
     * @see org.apache.tapestry.contrib.tree.model.ITreeNode#isLeaf()
     */
    public boolean isLeaf()
    {
        return false;
    }

    /**
     * @see java.lang.Object#toString()
     */
    public String toString()
    {
        return getName();
    }

    public String getName()
    {
        return "FileSystem";
    }

    /**
     * @see java.lang.Object#equals(Object)
     */
    public boolean equals(Object arg0)
    {
        if (!(arg0 instanceof FileSystem))
            return false;
        FileSystem objFileSystem = (FileSystem) arg0;
        if (getName().equals(objFileSystem.getName()))
            return true;
        return false;
    }

    /**
     * @see java.lang.Object#hashCode()
     */
    public int hashCode()
    {
        return getName().hashCode();
    }

    /**
     * @see org.apache.tapestry.workbench.tree.examples.fsmodel.IFileSystemTreeNode#getAbsolutePath()
     */
    public String getAbsolutePath()
    {
        return "";
    }

    /**
     * @see org.apache.tapestry.workbench.tree.examples.fsmodel.IFileSystemTreeNode#getAssets()
     */
    public AssetsHolder getAssets()
    {
        if (m_objAssetsHolder == null)
        {
            m_objAssetsHolder = new AssetsHolder(_assetService,
                    "/org/apache/tapestry/workbench/tree/examples/fsmodel/computer.gif",
                    "/org/apache/tapestry/workbench/tree/examples/fsmodel/computer.gif");
        }
        return m_objAssetsHolder;
    }

    /**
     * @see org.apache.tapestry.workbench.tree.examples.fsmodel.IFileSystemTreeNode#getDate()
     */
    public Date getDate()
    {
        return null;
    }

}