Target Explorer: Fix remote file system issues

3 files changed, 360 insertions, 337 deletions

diff --git a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/operations/OpParsePath.java b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/operations/OpParsePath.java
index d4dd8b2aa..88ad44f73 100644
--- a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/operations/OpParsePath.java
+++ b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/operations/OpParsePath.java
@@ -12,12 +12,14 @@ package org.eclipse.tcf.te.tcf.filesystem.core.internal.operations;
 import java.io.File;
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
 
 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.ISafeRunnable;
 import org.eclipse.core.runtime.SafeRunner;
 import org.eclipse.tcf.protocol.IPeer;
+import org.eclipse.tcf.protocol.Protocol;
 import org.eclipse.tcf.te.runtime.utils.Host;
 import org.eclipse.tcf.te.tcf.filesystem.core.internal.exceptions.TCFException;
 import org.eclipse.tcf.te.tcf.filesystem.core.internal.testers.TargetPropertyTester;
@@ -63,7 +65,22 @@ public class OpParsePath extends Operation {
 			if (slash != -1) {
 				String peerId = filePath.substring(0, slash);
 				peerId = peerId.replace(CacheManager.PATH_ESCAPE_CHAR, ':');
-				peer = Model.getModel().getService(ILocatorModelLookupService.class).lkupPeerModelById(peerId);
+
+				final AtomicReference<IPeerModel> peerModel = new AtomicReference<IPeerModel>();
+				final String finPeerId = peerId;
+
+				Runnable runnable = new Runnable() {
+
+					@Override
+					public void run() {
+						peerModel.set(Model.getModel().getService(ILocatorModelLookupService.class).lkupPeerModelById(finPeerId));
+					}
+				};
+
+				if (Protocol.isDispatchThread()) runnable.run();
+				else Protocol.invokeAndWait(runnable);
+
+				this.peer = peerModel.get();
 				if (peer != null) {
 					boolean hostWindows = Host.isWindowsHost();
 					boolean windows = TargetPropertyTester.isWindows(peer);
diff --git a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/url/TcfURLConnection.java b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/url/TcfURLConnection.java
index 667bbf492..33fc6a3f1 100644
--- a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/url/TcfURLConnection.java
+++ b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/internal/url/TcfURLConnection.java
@@ -15,6 +15,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URL;
 import java.net.URLConnection;
+import java.util.concurrent.atomic.AtomicReference;
 
 import org.eclipse.core.runtime.Assert;
 import org.eclipse.osgi.util.NLS;
@@ -105,13 +106,28 @@ public class TcfURLConnection extends URLConnection {
 	 * @param peerId The target peer's ID.
 	 * @return The peer with this ID or null if not found.
 	 */
-    private IPeer findPeer(String peerId) {
-		IPeer peer = Protocol.getLocator().getPeers().get(peerId);
-		if(peer == null) {
-			IPeerModel peerNode = Model.getModel().getService(ILocatorModelLookupService.class).lkupPeerModelById(peerId);
-			if(peerNode != null) peer = peerNode.getPeer();
-		}
-		return peer;
+    private IPeer findPeer(final String peerId) {
+    	Assert.isNotNull(peerId);
+
+    	final AtomicReference<IPeer> peer = new AtomicReference<IPeer>();
+
+    	Runnable runnable = new Runnable() {
+
+			@Override
+			public void run() {
+				IPeer p = Protocol.getLocator().getPeers().get(peerId);
+				if (p == null) {
+					IPeerModel peerNode = Model.getModel().getService(ILocatorModelLookupService.class).lkupPeerModelById(peerId);
+					if (peerNode != null) p = peerNode.getPeer();
+				}
+				peer.set(p);
+			}
+		};
+
+		if (Protocol.isDispatchThread()) runnable.run();
+		else Protocol.invokeAndWait(runnable);
+
+		return peer.get();
 	}
 
 	/**
diff --git a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/model/AbstractTreeNode.java b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/model/AbstractTreeNode.java
index 472aeda25..d0172ba98 100644
--- a/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/model/AbstractTreeNode.java
+++ b/target_explorer/plugins/org.eclipse.tcf.te.tcf.filesystem.core/src/org/eclipse/tcf/te/tcf/filesystem/core/model/AbstractTreeNode.java
@@ -1,329 +1,319 @@
-/*******************************************************************************

- * Copyright (c) 2011, 2012 Wind River Systems, Inc. and others. All rights reserved.

- * This program and the accompanying materials are made available under the terms

- * of the Eclipse Public License v1.0 which accompanies this distribution, and is

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

- *

- * Contributors:

- * Wind River Systems - initial API and implementation

- *******************************************************************************/

-package org.eclipse.tcf.te.tcf.filesystem.core.model;

-

-import java.beans.PropertyChangeEvent;

-import java.util.ArrayList;

-import java.util.Collections;

-import java.util.List;

-import java.util.UUID;

-

-import org.eclipse.core.runtime.PlatformObject;

-import org.eclipse.tcf.te.core.interfaces.IPropertyChangeProvider;

-import org.eclipse.tcf.te.core.interfaces.IViewerInput;

-import org.eclipse.tcf.te.runtime.interfaces.callback.ICallback;

-import org.eclipse.tcf.te.tcf.core.Tcf;

-import org.eclipse.tcf.te.tcf.core.interfaces.IChannelManager.DoneOpenChannel;

-import org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.NullOpExecutor;

-import org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.OpUser;

-import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;

-import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModelProvider;

-

-/**

- * The base class of FSTreeNode and ProcessTreeNode which provides base members and methods.

- */

-public abstract class AbstractTreeNode extends PlatformObject implements IPeerModelProvider{

-	// The unique id of this node.

-	protected final UUID uniqueId = UUID.randomUUID();

-

-	/**

-	 * The tree node name.

-	 */

-	public String name = null;

-

-	/**

-	 * The tree node type.

-	 */

-	public String type = null;

-

-	/**

-	 * The peer node the file system tree node is associated with.

-	 */

-	public IPeerModel peerNode = null;

-

-	/**

-	 * Flag to mark once the children of the node got queried

-	 */

-	public boolean childrenQueried = false;

-

-	/**

-	 * Flag to mark once the children query is running

-	 */

-	public boolean childrenQueryRunning = false;

-

-	/**

-	 * The tree node parent.

-	 */

-	protected AbstractTreeNode parent = null;

-

-	/**

-	 * The tree node children.

-	 */

-	protected List<AbstractTreeNode> children = Collections.synchronizedList(new ArrayList<AbstractTreeNode>());

-

-	/*

-	 * (non-Javadoc)

-	 *

-	 * @see java.lang.Object#hashCode()

-	 */

-	@Override

-	public final int hashCode() {

-		return uniqueId.hashCode();

-	}

-

-	/*

-	 * (non-Javadoc)

-	 *

-	 * @see java.lang.Object#equals(java.lang.Object)

-	 */

-	@Override

-	public final boolean equals(Object obj) {

-		if(this == obj)

-			return true;

-		if (obj instanceof AbstractTreeNode) {

-			return uniqueId.equals(((AbstractTreeNode) obj).uniqueId);

-		}

-		return super.equals(obj);

-	}

-

-	/*

-	 * (non-Javadoc)

-	 *

-	 * @see java.lang.Object#toString()

-	 */

-	@Override

-	public String toString() {

-		StringBuilder buffer = new StringBuilder(getClass().getSimpleName());

-		buffer.append(": name=" + (name != null ? name : super.toString())); //$NON-NLS-1$

-		buffer.append(", UUID=" + uniqueId.toString()); //$NON-NLS-1$

-		return buffer.toString();

-	}

-

-	/*

-	 * (non-Javadoc)

-	 * @see org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModelProvider#getPeerModel()

-	 */

-	@Override

-    public IPeerModel getPeerModel() {

-	    return peerNode;

-    }

-	

-	/**

-	 * Called when the children query is done.

-	 */

-	public void queryDone() {

-		childrenQueryRunning = false;

-		childrenQueried = true;

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "query_done", Boolean.FALSE, Boolean.TRUE); //$NON-NLS-1$

-		firePropertyChange(event);

-	}

-	

-	/**

-	 * Called when the children query is started.

-	 */

-	public void queryStarted() {

-		childrenQueryRunning = true;

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "query_started", Boolean.FALSE, Boolean.TRUE); //$NON-NLS-1$

-		firePropertyChange(event);

-	}

-	

-	/**

-	 * Get the user account of the specified TCF peer.

-	 * 

-	 * @param peerNode The peer node of the TCF agent.

-	 * @return The user account that runs the agent.

-	 */

-	protected UserAccount getUserAccount(IPeerModel peerNode) {

-		OpUser user = new OpUser(peerNode);

-		new NullOpExecutor().execute(user);

-		return user.getUserAccount();

-	}

-	

-	/**

-	 * Fire a property change event to notify one of the node's property has changed.

-	 * 

-	 * @param event The property change event.

-	 */

-	public void firePropertyChange(PropertyChangeEvent event) {

-		if(peerNode != null) {

-			IPropertyChangeProvider provider = (IPropertyChangeProvider) peerNode.getAdapter(IPropertyChangeProvider.class);

-			provider.firePropertyChange(event);

-		} else if(parent != null) {

-			parent.firePropertyChange(event);

-		}

-    }

-

-	/**

-	 * Add the specified nodes to the children list.

-	 * 

-	 * @param nodes The nodes to be added.

-	 */

-	public void addChidren(List<? extends AbstractTreeNode> nodes) {

-		children.addAll(nodes);

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "addChildren", null, null); //$NON-NLS-1$

-		firePropertyChange(event);

-    }

-

-	/**

-	 * Remove the specified nodes from the children list.

-	 * 

-	 * @param nodes The nodes to be removed.

-	 */

-	public void removeChildren(List<? extends AbstractTreeNode> nodes) {

-		children.removeAll(nodes);

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "removeChildren", null, null); //$NON-NLS-1$

-		firePropertyChange(event);

-    }

-

-	/**

-	 * Add the specified the node to the children list.

-	 * 

-	 * @param node The child node to be added.

-	 */

-	public void addChild(AbstractTreeNode node) {

-		children.add(node);

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "addChild", null, null); //$NON-NLS-1$

-		firePropertyChange(event);

-    }

-

-	/**

-	 * Remove the specified child node from its children list.

-	 * 

-	 * @param node The child node to be removed.

-	 */

-	public void removeChild(AbstractTreeNode node) {

-		children.remove(node);

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "removeChild", null, null); //$NON-NLS-1$

-		firePropertyChange(event);

-    }

-

-	/**

-	 * Clear the children of this folder.

-	 */

-	public void clearChildren() {

-		children.clear();

-		PropertyChangeEvent event = new PropertyChangeEvent(this, "clearChildren", null, null); //$NON-NLS-1$

-		firePropertyChange(event);

-    }

-

-	/**

-	 * If this node is ancestor of the specified node.

-	 * @return true if it is.

-	 */

-	public boolean isAncestorOf(AbstractTreeNode node) {

-		if (node == null) return false;

-		if (node.parent == this) return true;

-		return isAncestorOf(node.parent);

-	}

-

-	/**

-	 * Get the parent node of this node.

-	 * 

-	 * @return The parent node.

-	 */

-	public AbstractTreeNode getParent() {

-		return parent;

-	}

-	

-	/**

-	 * Set the parent node of this node.

-	 * 

-	 * @param parent The parent node.

-	 */

-	public void setParent(AbstractTreeNode parent) {

-		this.parent = parent;

-	}

-

-	/**

-	 * Recursively refresh the children of the given process context.

-	 *

-	 * @param parentNode The process context node. Must not be <code>null</code>.

-	 */

-	public void refresh() {

-		refresh(null);

-	}

-

-	/*

-	 * (non-Javadoc)

-	 * @see org.eclipse.core.runtime.PlatformObject#getAdapter(java.lang.Class)

-	 */

-	@SuppressWarnings("rawtypes")

-    @Override

-    public Object getAdapter(Class adapter) {

-		if(IViewerInput.class.equals(adapter)) {

-			return peerNode.getAdapter(IViewerInput.class);

-		}

-		if(IPropertyChangeProvider.class.equals(adapter)) {

-			return peerNode.getAdapter(adapter);

-		}

-	    return super.getAdapter(adapter);

-    }

-

-	/**

-	 * Recursively refresh the children of the given process context with a callback, which is

-	 * called when whole process is finished.

-	 *

-	 * @param callback The callback object, or <code>null</code> when callback is not needed.

-	 */

-	public void refresh(ICallback callback) {

-		queryStarted();

-		Tcf.getChannelManager().openChannel(peerNode.getPeer(), null, doCreateRefreshDoneOpenChannel(callback));

-	}

-

-	/**

-	 * Create the callback object of opening channel for refreshing itself.

-	 * 

-	 * @param callback The callback object.

-	 * @return The callback object.

-	 */

-	protected abstract DoneOpenChannel doCreateRefreshDoneOpenChannel(ICallback callback);

-

-	/**

-	 * Query the children of this file system node.

-	 */

-	public void queryChildren() {

-		queryChildren(null);

-	}

-	/**

-	 * Query the children of this file system node.

-	 */

-	public void queryChildren(ICallback callback) {

-		queryStarted();

-		Tcf.getChannelManager().openChannel(peerNode.getPeer(), null, doCreateQueryDoneOpenChannel(callback));

-	}

-

-	/**

-	 * Create the callback object of opening channel for querying children.

-	 * 

-	 * @return The callback object.

-	 */

-	protected abstract DoneOpenChannel doCreateQueryDoneOpenChannel(ICallback callback);

-	

-	/**

-	 * Return if this node is the system root.

-	 * 

-	 * @return true if it is.

-	 */

-	public abstract boolean isSystemRoot();

-

-	/**

-	 * Get the children of this tree node.

-	 * 

-	 * @return The list of the children.

-	 */

-	public List<? extends AbstractTreeNode> getChildren() {

-		return new ArrayList<AbstractTreeNode>(children);

-	}

-

-	/**

-	 * Refresh the children's children.

-	 */

-	public abstract void refreshChildren();

-}

+/*******************************************************************************
+ * Copyright (c) 2011, 2012 Wind River Systems, Inc. and others. All rights reserved.
+ * This program and the accompanying materials are made available under the terms
+ * of the Eclipse Public License v1.0 which accompanies this distribution, and is
+ * available at http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Wind River Systems - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.tcf.te.tcf.filesystem.core.model;
+
+import java.beans.PropertyChangeEvent;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.UUID;
+
+import org.eclipse.core.runtime.PlatformObject;
+import org.eclipse.tcf.te.core.interfaces.IPropertyChangeProvider;
+import org.eclipse.tcf.te.core.interfaces.IViewerInput;
+import org.eclipse.tcf.te.runtime.interfaces.callback.ICallback;
+import org.eclipse.tcf.te.tcf.core.Tcf;
+import org.eclipse.tcf.te.tcf.core.interfaces.IChannelManager.DoneOpenChannel;
+import org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.NullOpExecutor;
+import org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.OpUser;
+import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
+
+/**
+ * The base class of FSTreeNode and ProcessTreeNode which provides base members and methods.
+ */
+public abstract class AbstractTreeNode extends PlatformObject {
+	// The unique id of this node.
+	protected final UUID uniqueId = UUID.randomUUID();
+
+	/**
+	 * The tree node name.
+	 */
+	public String name = null;
+
+	/**
+	 * The tree node type.
+	 */
+	public String type = null;
+
+	/**
+	 * The peer node the file system tree node is associated with.
+	 */
+	public IPeerModel peerNode = null;
+
+	/**
+	 * Flag to mark once the children of the node got queried
+	 */
+	public boolean childrenQueried = false;
+
+	/**
+	 * Flag to mark once the children query is running
+	 */
+	public boolean childrenQueryRunning = false;
+
+	/**
+	 * The tree node parent.
+	 */
+	protected AbstractTreeNode parent = null;
+
+	/**
+	 * The tree node children.
+	 */
+	protected List<AbstractTreeNode> children = Collections.synchronizedList(new ArrayList<AbstractTreeNode>());
+
+	/*
+	 * (non-Javadoc)
+	 *
+	 * @see java.lang.Object#hashCode()
+	 */
+	@Override
+	public final int hashCode() {
+		return uniqueId.hashCode();
+	}
+
+	/*
+	 * (non-Javadoc)
+	 *
+	 * @see java.lang.Object#equals(java.lang.Object)
+	 */
+	@Override
+	public final boolean equals(Object obj) {
+		if(this == obj)
+			return true;
+		if (obj instanceof AbstractTreeNode) {
+			return uniqueId.equals(((AbstractTreeNode) obj).uniqueId);
+		}
+		return super.equals(obj);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 *
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		StringBuilder buffer = new StringBuilder(getClass().getSimpleName());
+		buffer.append(": name=" + (name != null ? name : super.toString())); //$NON-NLS-1$
+		buffer.append(", UUID=" + uniqueId.toString()); //$NON-NLS-1$
+		return buffer.toString();
+	}
+
+	/**
+	 * Called when the children query is done.
+	 */
+	public void queryDone() {
+		childrenQueryRunning = false;
+		childrenQueried = true;
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "query_done", Boolean.FALSE, Boolean.TRUE); //$NON-NLS-1$
+		firePropertyChange(event);
+	}
+
+	/**
+	 * Called when the children query is started.
+	 */
+	public void queryStarted() {
+		childrenQueryRunning = true;
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "query_started", Boolean.FALSE, Boolean.TRUE); //$NON-NLS-1$
+		firePropertyChange(event);
+	}
+
+	/**
+	 * Get the user account of the specified TCF peer.
+	 *
+	 * @param peerNode The peer node of the TCF agent.
+	 * @return The user account that runs the agent.
+	 */
+	protected UserAccount getUserAccount(IPeerModel peerNode) {
+		OpUser user = new OpUser(peerNode);
+		new NullOpExecutor().execute(user);
+		return user.getUserAccount();
+	}
+
+	/**
+	 * Fire a property change event to notify one of the node's property has changed.
+	 *
+	 * @param event The property change event.
+	 */
+	public void firePropertyChange(PropertyChangeEvent event) {
+		if(peerNode != null) {
+			IPropertyChangeProvider provider = (IPropertyChangeProvider) peerNode.getAdapter(IPropertyChangeProvider.class);
+			provider.firePropertyChange(event);
+		} else if(parent != null) {
+			parent.firePropertyChange(event);
+		}
+    }
+
+	/**
+	 * Add the specified nodes to the children list.
+	 *
+	 * @param nodes The nodes to be added.
+	 */
+	public void addChidren(List<? extends AbstractTreeNode> nodes) {
+		children.addAll(nodes);
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "addChildren", null, null); //$NON-NLS-1$
+		firePropertyChange(event);
+    }
+
+	/**
+	 * Remove the specified nodes from the children list.
+	 *
+	 * @param nodes The nodes to be removed.
+	 */
+	public void removeChildren(List<? extends AbstractTreeNode> nodes) {
+		children.removeAll(nodes);
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "removeChildren", null, null); //$NON-NLS-1$
+		firePropertyChange(event);
+    }
+
+	/**
+	 * Add the specified the node to the children list.
+	 *
+	 * @param node The child node to be added.
+	 */
+	public void addChild(AbstractTreeNode node) {
+		children.add(node);
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "addChild", null, null); //$NON-NLS-1$
+		firePropertyChange(event);
+    }
+
+	/**
+	 * Remove the specified child node from its children list.
+	 *
+	 * @param node The child node to be removed.
+	 */
+	public void removeChild(AbstractTreeNode node) {
+		children.remove(node);
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "removeChild", null, null); //$NON-NLS-1$
+		firePropertyChange(event);
+    }
+
+	/**
+	 * Clear the children of this folder.
+	 */
+	public void clearChildren() {
+		children.clear();
+		PropertyChangeEvent event = new PropertyChangeEvent(this, "clearChildren", null, null); //$NON-NLS-1$
+		firePropertyChange(event);
+    }
+
+	/**
+	 * If this node is ancestor of the specified node.
+	 * @return true if it is.
+	 */
+	public boolean isAncestorOf(AbstractTreeNode node) {
+		if (node == null) return false;
+		if (node.parent == this) return true;
+		return isAncestorOf(node.parent);
+	}
+
+	/**
+	 * Get the parent node of this node.
+	 *
+	 * @return The parent node.
+	 */
+	public AbstractTreeNode getParent() {
+		return parent;
+	}
+
+	/**
+	 * Set the parent node of this node.
+	 *
+	 * @param parent The parent node.
+	 */
+	public void setParent(AbstractTreeNode parent) {
+		this.parent = parent;
+	}
+
+	/**
+	 * Recursively refresh the children of the given process context.
+	 *
+	 * @param parentNode The process context node. Must not be <code>null</code>.
+	 */
+	public void refresh() {
+		refresh(null);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.core.runtime.PlatformObject#getAdapter(java.lang.Class)
+	 */
+	@SuppressWarnings("rawtypes")
+    @Override
+    public Object getAdapter(Class adapter) {
+		if(IViewerInput.class.equals(adapter)) {
+			return peerNode.getAdapter(IViewerInput.class);
+		}
+		if(IPropertyChangeProvider.class.equals(adapter)) {
+			return peerNode.getAdapter(adapter);
+		}
+	    return super.getAdapter(adapter);
+    }
+
+	/**
+	 * Recursively refresh the children of the given process context with a callback, which is
+	 * called when whole process is finished.
+	 *
+	 * @param callback The callback object, or <code>null</code> when callback is not needed.
+	 */
+	public void refresh(ICallback callback) {
+		queryStarted();
+		Tcf.getChannelManager().openChannel(peerNode.getPeer(), null, doCreateRefreshDoneOpenChannel(callback));
+	}
+
+	/**
+	 * Create the callback object of opening channel for refreshing itself.
+	 *
+	 * @param callback The callback object.
+	 * @return The callback object.
+	 */
+	protected abstract DoneOpenChannel doCreateRefreshDoneOpenChannel(ICallback callback);
+
+	/**
+	 * Query the children of this file system node.
+	 */
+	public void queryChildren() {
+		queryChildren(null);
+	}
+	/**
+	 * Query the children of this file system node.
+	 */
+	public void queryChildren(ICallback callback) {
+		queryStarted();
+		Tcf.getChannelManager().openChannel(peerNode.getPeer(), null, doCreateQueryDoneOpenChannel(callback));
+	}
+
+	/**
+	 * Create the callback object of opening channel for querying children.
+	 *
+	 * @return The callback object.
+	 */
+	protected abstract DoneOpenChannel doCreateQueryDoneOpenChannel(ICallback callback);
+
+	/**
+	 * Return if this node is the system root.
+	 *
+	 * @return true if it is.
+	 */
+	public abstract boolean isSystemRoot();
+
+	/**
+	 * Get the children of this tree node.
+	 *
+	 * @return The list of the children.
+	 */
+	public List<? extends AbstractTreeNode> getChildren() {
+		return new ArrayList<AbstractTreeNode>(children);
+	}
+
+	/**
+	 * Refresh the children's children.
+	 */
+	public abstract void refreshChildren();
+}