1 /*******************************************************************************

     2  * Copyright (c) 2000, 2009 IBM Corporation and others.

     3  * All rights reserved. This program and the accompanying materials

     4  * are made available under the terms of the Eclipse Public License v1.0

     5  * which accompanies this distribution, and is available at

     6  * http://www.eclipse.org/legal/epl-v10.html

     7  * 

     8  * Contributors:

     9  *     IBM Corporation - initial API and implementation

    10  *******************************************************************************/

    11 package org.eclipse.core.internal.localstore;

    12 

    13 import java.util.Iterator;

    14 import org.eclipse.core.filesystem.*;

    15 import org.eclipse.core.internal.resources.Resource;

    16 import org.eclipse.core.resources.IResource;

    17 

    18 /**

    19  * A node in a {@link UnifiedTree}. A node usually represents a file/folder

    20  * in the workspace, the file system, or both. There are also special node

    21  * instances to act as child and level markers in the tree.

    22  */

    23 public class UnifiedTreeNode implements ILocalStoreConstants {

    24 	protected UnifiedTreeNode child;

    25 	protected boolean existsWorkspace;

    26 	protected IFileInfo fileInfo;

    27 	protected IResource resource;

    28 	protected IFileStore store;

    29 	protected UnifiedTree tree;

    30 

    31 	public UnifiedTreeNode(UnifiedTree tree, IResource resource, IFileStore store, IFileInfo fileInfo, boolean existsWorkspace) {

    32 		this.tree = tree;

    33 		this.resource = resource;

    34 		this.store = store;

    35 		this.fileInfo = fileInfo;

    36 		this.existsWorkspace = existsWorkspace;

    37 	}

    38 

    39 	public boolean existsInFileSystem() {

    40 		return fileInfo != null && fileInfo.exists();

    41 	}

    42 

    43 	public boolean existsInWorkspace() {

    44 		return existsWorkspace;

    45 	}

    46 

    47 	/**

    48 	 * Returns an Iterator of UnifiedTreeNode.

    49 	 */

    50 	public Iterator getChildren() {

    51 		return tree.getChildren(this);

    52 	}

    53 

    54 	protected UnifiedTreeNode getFirstChild() {

    55 		return child;

    56 	}

    57 

    58 	public long getLastModified() {

    59 		return fileInfo == null ? 0 : fileInfo.getLastModified();

    60 	}

    61 

    62 	public int getLevel() {

    63 		return tree.getLevel();

    64 	}

    65 

    66 	/**

    67 	 * Gets the name of this node in the local file system.

    68 	 * @return Returns a String

    69 	 */

    70 	public String getLocalName() {

    71 		return fileInfo == null ? null : fileInfo.getName();

    72 	}

    73 

    74 	public IResource getResource() {

    75 		return resource;

    76 	}

    77 

    78 	/**

    79 	 * Returns the local store of this resource.  May be null.

    80 	 */

    81 	public IFileStore getStore() {

    82 		//initialize store lazily, because it is not always needed

    83 		if (store == null)

    84 			store = ((Resource) resource).getStore();

    85 		return store;

    86 	}

    87 

    88 	public boolean isFolder() {

    89 		return fileInfo == null ? false : fileInfo.isDirectory();

    90 	}

    91 	

    92 	public boolean isSymbolicLink() {

    93 		return fileInfo == null ? false : fileInfo.getAttribute(EFS.ATTRIBUTE_SYMLINK);

    94 	}

    95 

    96 	public void removeChildrenFromTree() {

    97 		tree.removeNodeChildrenFromQueue(this);

    98 	}

    99 

   100 	/**

   101 	 * Reuses this object by assigning all new values for the fields.

   102 	 */

   103 	public void reuse(UnifiedTree aTree, IResource aResource, IFileStore aStore, IFileInfo info, boolean existsInWorkspace) {

   104 		this.tree = aTree;

   105 		this.child = null;

   106 		this.resource = aResource;

   107 		this.store = aStore;

   108 		this.fileInfo = info;

   109 		this.existsWorkspace = existsInWorkspace;

   110 	}

   111 

   112 	public void setExistsWorkspace(boolean exists) {

   113 		this.existsWorkspace = exists;

   114 	}

   115 

   116 	protected void setFirstChild(UnifiedTreeNode child) {

   117 		this.child = child;

   118 	}

   119 

   120 	public void setResource(IResource resource) {

   121 		this.resource = resource;

   122 	}

   123 

   124 	public String toString() {

   125 		String s = resource == null ? "null" : resource.getFullPath().toString(); //$NON-NLS-1$

   126 		return "Node: " + s; //$NON-NLS-1$

   127 	}

   128 }