X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.nattable%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fnattable%2FTreeNode.java;h=4f9273d9120cfd48547986b1fcb630120fe98582;hp=941c6f319be56e491909cc35472e7173a5040ccf;hb=bbfae087089fa3126eefb18207fde0cfaa7315a3;hpb=e02b8761385c8b353cccabab32897353f764cac6

diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
index 941c6f319..4f9273d91 100644
--- a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/TreeNode.java
@@ -1,367 +1,412 @@
-package org.simantics.browsing.ui.nattable;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import org.eclipse.core.runtime.IAdaptable;
-import org.eclipse.jface.resource.ColorDescriptor;
-import org.eclipse.jface.resource.FontDescriptor;
-import org.eclipse.jface.resource.ImageDescriptor;
-import org.eclipse.nebula.widgets.nattable.style.CellStyleAttributes;
-import org.eclipse.nebula.widgets.nattable.style.Style;
-import org.eclipse.swt.graphics.Color;
-import org.eclipse.swt.graphics.Font;
-import org.eclipse.swt.graphics.Image;
-import org.simantics.browsing.ui.BuiltinKeys;
-import org.simantics.browsing.ui.NodeContext;
-import org.simantics.browsing.ui.common.internal.GENodeQueryManager;
-import org.simantics.browsing.ui.content.ImageDecorator;
-import org.simantics.browsing.ui.content.Imager;
-import org.simantics.browsing.ui.content.LabelDecorator;
-import org.simantics.browsing.ui.content.Labeler;
-import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GECache2;
-import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GeViewerContext;
-import org.simantics.browsing.ui.swt.ViewerRowReference;
-import org.simantics.utils.datastructures.BijectionMap;
-
-public class TreeNode implements IAdaptable {
-	private static boolean DEBUG = false;
-	
-	private NodeContext context;
-	GENodeQueryManager manager;
-	GeViewerContext explorerContext;
-	
-	TreeNode parent;
-	List<TreeNode> children = new ArrayList<TreeNode>();
-	boolean expanded;
-	
-	public TreeNode(NodeContext context, GeViewerContext explorerContext) {
-		this.context = context;
-		this.explorerContext = explorerContext;
-		this.expanded = false;
-		manager = new GENodeQueryManager(explorerContext, null, null, ViewerRowReference.create(this));
-		explorerContext.getContextToNodeMap().add(context, this);
-	}
-	
-	int getDepth() {
-		if (parent == null)
-			return 0;
-		return parent.getDepth() + 1;
-	}
-	
-	int listIndex;
-	
-	public int getListIndex() {
-		return listIndex;
-	}
-	
-	public void setListIndex(int listIndex) {
-		this.listIndex = listIndex;
-	}
-	
-	List<TreeNode> getChildren() {
-		return children;
-	}
-	
-	public TreeNode getParent() {
-		return parent;
-	}
-	
-	public void setExpanded(boolean expanded) {
-		this.expanded = expanded;
-	}
-	
-	public boolean isExpanded() {
-		return expanded;
-	}
-	
-	public NodeContext getContext() {
-		return context;
-	}
-	
-	private Labeler labeler;
-	private Imager imager;
-	Collection<LabelDecorator> labelDecorators;
-	Collection<ImageDecorator> imageDecorators;
-	 
-	Map<String, String> labels;
-	Map<String, String> runtimeLabels;
-	
-	public String getValueString(int column) {
-		if (column == 0) {
-			initData();
-		}
-		if (labeler != null) {
-			String key = explorerContext.getGe().getColumns()[column].getKey();
-			String s = null;
-			if (runtimeLabels != null)
-				s = runtimeLabels.get(key);
-			if (s == null)
-				s = labels.get(key);
-			if (labelDecorators != null && !labelDecorators.isEmpty()) {
-				int index = 0;
-				for (LabelDecorator ld : labelDecorators) {
-					String ds = ld.decorateLabel(s, key, index);
-					if (ds != null)
-						s = ds;
-				}
-			}
-			return s;
-		}
-		return null;
-	}
-	
-	public Image getImage(int column) {
-		String key = explorerContext.getGe().getColumns()[column].getKey();
-		if (imager != null) {
-			Object descOrImage = null;
-			boolean hasUncachedImages = false;
-
-			ImageDescriptor desc = imager.getImage(key);
-			if (desc != null) {
-				int index = 0;
-				// Attempt to decorate the label
-				if (!imageDecorators.isEmpty()) {
-					for (ImageDecorator id : imageDecorators) {
-						ImageDescriptor ds = id.decorateImage(desc, key, index);
-						if (ds != null)
-							desc = ds;
-					}
-				}
-
-				// Try resolving only cached images here and now
-				Object img = explorerContext.getGe().localResourceManager.find(desc);
-				if (img == null)
-					img = explorerContext.getGe().resourceManager.find(desc);
-
-				descOrImage = img != null ? img : desc;
-				hasUncachedImages |= img == null;
-			}
-
-			if (!hasUncachedImages) {
-				return (Image) descOrImage;
-			} else {
-				// Schedule loading to another thread to refrain from
-				// blocking
-				// the UI with database operations.
-				explorerContext.getGe().queueImageTask(this, new ImageTask(this, descOrImage));
-				return null;
-			}
-		} else {
-			return null;
-		}
-	}
-	
-	public void getStyle(int column, Style style) {
-		String key = explorerContext.getGe().getColumns()[column].getKey();
-		FontDescriptor font = explorerContext.getGe().originalFont;
-		ColorDescriptor bg = explorerContext.getGe().originalBackground;
-		ColorDescriptor fg = explorerContext.getGe().originalForeground;
-		
-		// Attempt to decorate the label
-		if (labelDecorators != null && !labelDecorators.isEmpty()) {
-			int index = 0;
-			for (LabelDecorator ld : labelDecorators) {
-
-				FontDescriptor dfont = ld.decorateFont(font, key, index);
-				if (dfont != null)
-					font = dfont;
-
-				ColorDescriptor dbg = ld.decorateBackground(bg,	key, index);
-				if (dbg != null)
-					bg = dbg;
-
-				ColorDescriptor dfg = ld.decorateForeground(fg,	key, index);
-				if (dfg != null)
-					fg = dfg;
-			}
-		}
-
-		if (font != explorerContext.getGe().originalFont) {
-			// System.out.println("set font: " + index + ": " +
-			// font);
-			style.setAttributeValue(CellStyleAttributes.FONT,(Font) explorerContext.getGe().localResourceManager.get(font));
-		} else {
-			style.setAttributeValue(CellStyleAttributes.FONT,(Font) (explorerContext.getGe().originalFont != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalFont) : null));
-		}
-		if (bg != explorerContext.getGe().originalBackground)
-			style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(bg));
-		else
-			style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) (explorerContext.getGe().originalBackground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalBackground) : null));
-		if (fg != explorerContext.getGe().originalForeground)
-			style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(fg));
-		else
-			style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) (explorerContext.getGe().originalForeground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalForeground) : null));
-
-	}
-	
-	private void initData() {
-		labeler = manager.query(context, BuiltinKeys.SELECTED_LABELER);
-		imager = manager.query(context, BuiltinKeys.SELECTED_IMAGER);
-		labelDecorators = manager.query(context, BuiltinKeys.LABEL_DECORATORS);
-		imageDecorators = manager.query(context, BuiltinKeys.IMAGE_DECORATORS);
-		
-		if (labeler != null) {
-    		labels = labeler.getLabels();
-			runtimeLabels = labeler.getRuntimeLabels();
-    	} else {
-    		labels = null;
-    		runtimeLabels = null;
-    	}
-	}
-	
-	public TreeNode addChild(NodeContext context, GeViewerContext explorerContext) {
-		TreeNode child = new TreeNode(context, explorerContext);
-		child.parent = this;
-		children.add(child);
-		if (DEBUG) System.out.println("Add " + this  + " -> " + child);
-		return child;
-	}
-	
-	public TreeNode addChild(int index, NodeContext context,GeViewerContext explorerContext) {
-		
-		TreeNode child = new TreeNode(context, explorerContext);
-		child.parent = this;
-		children.add(index,child);
-		if (DEBUG) System.out.println("Add " + this  + " -> " + child + " at " + index);
-		return child;
-	}
-	
-	public TreeNode setChild(int index, NodeContext context, GeViewerContext explorerContext) {
-		
-		TreeNode child = new TreeNode(context, explorerContext);
-		child.parent = this;
-		children.set(index,child);
-		if (DEBUG) System.out.println("Set " + this  + " -> " + child + " at " + index);
-		return child;
-	}
-	
-	public void dispose() {
-		if (parent != null)
-			parent.children.remove(this);
-		dispose2();
-	}
-	
-	public void dispose2() {
-		if (DEBUG)	System.out.println("dispose " + this);
-		parent = null;
-		for (TreeNode n : children) {
-			n.dispose2();
-		}
-		clearCache();
-		children.clear();
-		explorerContext.getContextToNodeMap().remove(context, this);
-		context = null;
-		explorerContext = null;
-		manager.dispose();
-		manager = null;	
-	}
-	
-	private void clearCache() {
-		if (explorerContext != null) {
-			GECache2 cache = explorerContext.cache;
-			
-			if (cache != null) {
-				cache.dispose(context);
-			}
-		}
-	}
-	
-	public boolean updateChildren() {
-		if (context == null)
-			throw new IllegalStateException("Node is disposed.");
-		
-		NodeContext[] childContexts = manager.query(context, BuiltinKeys.FINAL_CHILDREN);
-		
-		if (DEBUG) System.out.println("updateChildren " + childContexts.length + " " + this);
-		
-		
-		boolean modified = false;
-		synchronized (children) {
-			
-			int oldCount = children.size();
-			BijectionMap<Integer, Integer> indexes = new BijectionMap<Integer, Integer>();
-			Set<Integer> mapped = new HashSet<Integer>();
-			boolean reorder = false;
-			// locate matching pairs form old and new children
-			for (int i = 0; i < oldCount; i++) {
-				NodeContext oldCtx = children.get(i).context;
-				for (int j = 0; j <childContexts.length; j++) {
-					if (mapped.contains(j))
-						continue;
-					if (oldCtx.equals(childContexts[j])) {
-						indexes.map(i, j);
-						mapped.add(j);
-						if (i != j)
-							reorder = true;
-						break;
-					}
-				}
-			}
-			// update children if required
-			if (childContexts.length != oldCount || reorder || childContexts.length != indexes.size()) {
-				modified = true;
-				List<TreeNode> oldChildren = new ArrayList<TreeNode>(oldCount);
-				oldChildren.addAll(children);
-				if (childContexts.length >= oldCount) {
-    	    		for (int i = 0; i < oldCount; i++) {
-    	    			Integer oldIndex = indexes.getLeft(i);
-    	    			if (oldIndex == null) {
-    	    				setChild(i, childContexts[i], explorerContext);
-    	    			} else {
-    	    				TreeNode n = oldChildren.get(oldIndex);
-    	    				children.set(i, n);
-    	    			}
-    	    			
-    	    		}
-    	    		for (int i = oldCount; i < childContexts.length; i++) {
-    	    			addChild(childContexts[i], explorerContext);
-    	    		}
-        		} else {
-        			for (int i = 0; i < childContexts.length; i++) {
-        				Integer oldIndex = indexes.getLeft(i);
-    	    			if (oldIndex == null) {
-    	    				setChild(i, childContexts[i], explorerContext);
-    	    			} else {
-    	    				TreeNode n = oldChildren.get(oldIndex);
-    	    				children.set(i, n);
-    	    			}
-    	    		}
-        			for (int i = oldCount -1; i >= childContexts.length; i--) {
-        				children.remove(i);
-        			}
-        		}
-				for (int i = 0; i < oldChildren.size(); i++) {
-					if (!indexes.containsLeft(i)) {
-						oldChildren.get(i).dispose2();
-					}
-				}
-				
-			}
-    		
-		}
-		return modified;
-	}
-	
-	public boolean isDisposed() {
-		return context == null;
-	}
-	
-	public GENodeQueryManager getManager() {
-		return manager;
-	}
-	
-	@SuppressWarnings("rawtypes")
-	@Override
-	public Object getAdapter(Class adapter) {
-		if (adapter == NodeContext.class)
-			return context;
-		
-		return context.getAdapter(adapter);
-	}
-
-}
+package org.simantics.browsing.ui.nattable;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.jface.resource.ColorDescriptor;
+import org.eclipse.jface.resource.FontDescriptor;
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.nebula.widgets.nattable.style.CellStyleAttributes;
+import org.eclipse.nebula.widgets.nattable.style.Style;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.graphics.Image;
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.common.internal.GENodeQueryManager;
+import org.simantics.browsing.ui.content.ImageDecorator;
+import org.simantics.browsing.ui.content.Imager;
+import org.simantics.browsing.ui.content.LabelDecorator;
+import org.simantics.browsing.ui.content.Labeler;
+import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GECache2;
+import org.simantics.browsing.ui.nattable.NatTableGraphExplorer.GeViewerContext;
+import org.simantics.browsing.ui.swt.ViewerRowReference;
+import org.simantics.utils.datastructures.BijectionMap;
+
+public class TreeNode implements IAdaptable {
+	private static boolean DEBUG = false;
+	
+	private NodeContext context;
+	GENodeQueryManager manager;
+	GeViewerContext explorerContext;
+	
+	TreeNode parent;
+	List<TreeNode> children = new ArrayList<TreeNode>();
+	boolean expanded;
+	boolean autoExpanded = false;
+	
+	public TreeNode(NodeContext context, GeViewerContext explorerContext) {
+		this.context = context;
+		this.explorerContext = explorerContext;
+		this.expanded = false;
+		manager = new GENodeQueryManager(explorerContext, null, null, ViewerRowReference.create(this));
+		explorerContext.getContextToNodeMap().add(context, this);
+	}
+	
+	public int getDepth() {
+		if (parent == null)
+			return 0;
+		return parent.getDepth() + 1;
+	}
+	
+	int listIndex = -1;
+	
+	public int getListIndex() {
+		return listIndex;
+	}
+	
+	public void setListIndex(int listIndex) {
+		this.listIndex = listIndex;
+	}
+	
+	List<TreeNode> getChildren() {
+		return children;
+	}
+	
+	public TreeNode getParent() {
+		return parent;
+	}
+	
+	public void setExpanded(boolean expanded) {
+		this.expanded = expanded;
+	}
+	
+	public boolean isExpanded() {
+		return expanded;
+	}
+	
+	public boolean isHidden() {
+		TreeNode n = parent;
+		while (n != null) {
+			if (!n.isExpanded())
+				return true;
+			n = n.getParent();
+		}
+		return false;
+	}
+	
+	public TreeNode getCollapsedAncestor() {
+		TreeNode collapsed = null;
+		TreeNode n = parent;
+		while (n != null) {
+			if (!n.isExpanded())
+				collapsed = n;
+			n = n.getParent();
+		}
+		return collapsed;
+	}
+	
+	public NodeContext getContext() {
+		return context;
+	}
+	
+	private Labeler labeler;
+	private Imager imager;
+	Collection<LabelDecorator> labelDecorators;
+	Collection<ImageDecorator> imageDecorators;
+	 
+	Map<String, String> labels;
+	Map<String, String> runtimeLabels;
+	
+	public String getValueString(int column) {
+		if (labels == null)
+			initData();
+		if (labeler != null) {
+			String key = explorerContext.getGe().getColumns()[column].getKey();
+			return getValue(key);
+		}
+		return null;
+	}
+	
+	private String getValue(String key) {
+		String s = null;
+		if (runtimeLabels != null)
+			s = runtimeLabels.get(key);
+		if (s == null)
+			s = labels.get(key);
+		if (labelDecorators != null && !labelDecorators.isEmpty()) {
+			int index = 0;
+			for (LabelDecorator ld : labelDecorators) {
+				String ds = ld.decorateLabel(s, key, index);
+				if (ds != null)
+					s = ds;
+			}
+		}
+		return s;
+	}
+	
+	public String getValueString(String key) {
+		if (labels == null)
+			initData();
+		if (labeler != null) {
+			return getValue(key);
+		}
+		return null;
+	}
+	
+	public Image getImage(int column) {
+		String key = explorerContext.getGe().getColumns()[column].getKey();
+		if (imager != null) {
+			Object descOrImage = null;
+			boolean hasUncachedImages = false;
+
+			ImageDescriptor desc = imager.getImage(key);
+			if (desc != null) {
+				int index = 0;
+				// Attempt to decorate the label
+				if (!imageDecorators.isEmpty()) {
+					for (ImageDecorator id : imageDecorators) {
+						ImageDescriptor ds = id.decorateImage(desc, key, index);
+						if (ds != null)
+							desc = ds;
+					}
+				}
+
+				// Try resolving only cached images here and now
+				Object img = explorerContext.getGe().localResourceManager.find(desc);
+				if (img == null)
+					img = explorerContext.getGe().resourceManager.find(desc);
+
+				descOrImage = img != null ? img : desc;
+				hasUncachedImages |= img == null;
+			}
+
+			if (!hasUncachedImages) {
+				return (Image) descOrImage;
+			} else {
+				// Schedule loading to another thread to refrain from
+				// blocking
+				// the UI with database operations.
+				explorerContext.getGe().queueImageTask(this, new ImageTask(this, descOrImage));
+				return null;
+			}
+		} else {
+			return null;
+		}
+	}
+	
+	public void getStyle(int column, Style style) {
+		String key = explorerContext.getGe().getColumns()[column].getKey();
+		FontDescriptor font = explorerContext.getGe().originalFont;
+		ColorDescriptor bg = explorerContext.getGe().originalBackground;
+		ColorDescriptor fg = explorerContext.getGe().originalForeground;
+		
+		// Attempt to decorate the label
+		if (labelDecorators != null && !labelDecorators.isEmpty()) {
+			int index = 0;
+			for (LabelDecorator ld : labelDecorators) {
+
+				FontDescriptor dfont = ld.decorateFont(font, key, index);
+				if (dfont != null)
+					font = dfont;
+
+				ColorDescriptor dbg = ld.decorateBackground(bg,	key, index);
+				if (dbg != null)
+					bg = dbg;
+
+				ColorDescriptor dfg = ld.decorateForeground(fg,	key, index);
+				if (dfg != null)
+					fg = dfg;
+			}
+		}
+
+		if (font != explorerContext.getGe().originalFont) {
+			// System.out.println("set font: " + index + ": " +
+			// font);
+			style.setAttributeValue(CellStyleAttributes.FONT,(Font) explorerContext.getGe().localResourceManager.get(font));
+		} else {
+			style.setAttributeValue(CellStyleAttributes.FONT,(Font) (explorerContext.getGe().originalFont != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalFont) : null));
+		}
+		if (bg != explorerContext.getGe().originalBackground)
+			style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(bg));
+		else
+			style.setAttributeValue(CellStyleAttributes.BACKGROUND_COLOR,(Color) (explorerContext.getGe().originalBackground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalBackground) : null));
+		if (fg != explorerContext.getGe().originalForeground)
+			style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) explorerContext.getGe().localResourceManager.get(fg));
+		else
+			style.setAttributeValue(CellStyleAttributes.FOREGROUND_COLOR,(Color) (explorerContext.getGe().originalForeground != null ? explorerContext.getGe().localResourceManager.get(explorerContext.getGe().originalForeground) : null));
+
+	}
+	
+	public void initData() {
+		labeler = manager.query(context, BuiltinKeys.SELECTED_LABELER);
+		imager = manager.query(context, BuiltinKeys.SELECTED_IMAGER);
+		labelDecorators = manager.query(context, BuiltinKeys.LABEL_DECORATORS);
+		imageDecorators = manager.query(context, BuiltinKeys.IMAGE_DECORATORS);
+		
+		if (labeler != null) {
+    		labels = labeler.getLabels();
+			runtimeLabels = labeler.getRuntimeLabels();
+    	} else {
+    		labels = null;
+    		runtimeLabels = null;
+    	}
+	}
+	
+	public TreeNode addChild(NodeContext context, GeViewerContext explorerContext) {
+		TreeNode child = new TreeNode(context, explorerContext);
+		child.parent = this;
+		children.add(child);
+		if (DEBUG) System.out.println("Add " + this  + " -> " + child);
+		return child;
+	}
+	
+	public TreeNode addChild(int index, NodeContext context,GeViewerContext explorerContext) {
+		
+		TreeNode child = new TreeNode(context, explorerContext);
+		child.parent = this;
+		children.add(index,child);
+		if (DEBUG) System.out.println("Add " + this  + " -> " + child + " at " + index);
+		return child;
+	}
+	
+	public TreeNode setChild(int index, NodeContext context, GeViewerContext explorerContext) {
+		
+		TreeNode child = new TreeNode(context, explorerContext);
+		child.parent = this;
+		children.set(index,child);
+		if (DEBUG) System.out.println("Set " + this  + " -> " + child + " at " + index);
+		return child;
+	}
+	
+	public void dispose() {
+		if (parent != null)
+			parent.children.remove(this);
+		dispose2();
+	}
+	
+	public void dispose2() {
+		if (DEBUG)	System.out.println("dispose " + this);
+		parent = null;
+		for (TreeNode n : children) {
+			n.dispose2();
+		}
+		clearCache();
+		children.clear();
+		explorerContext.getContextToNodeMap().remove(context, this);
+		context = null;
+		explorerContext = null;
+		manager.dispose();
+		manager = null;	
+	}
+	
+	private void clearCache() {
+		if (explorerContext != null) {
+			GECache2 cache = explorerContext.cache;
+			
+			if (cache != null) {
+				cache.dispose(context);
+			}
+		}
+	}
+	
+	public boolean updateChildren() {
+		if (context == null)
+			throw new IllegalStateException("Node is disposed.");
+		
+		NodeContext[] childContexts = manager.query(context, BuiltinKeys.FINAL_CHILDREN);
+		
+		if (DEBUG) System.out.println("updateChildren " + childContexts.length + " " + this);
+		
+		
+		boolean modified = false;
+		synchronized (children) {
+			
+			int oldCount = children.size();
+			BijectionMap<Integer, Integer> indexes = new BijectionMap<Integer, Integer>();
+			Set<Integer> mapped = new HashSet<Integer>();
+			boolean reorder = false;
+			// locate matching pairs form old and new children
+			for (int i = 0; i < oldCount; i++) {
+				NodeContext oldCtx = children.get(i).context;
+				for (int j = 0; j <childContexts.length; j++) {
+					if (mapped.contains(j))
+						continue;
+					if (oldCtx.equals(childContexts[j])) {
+						indexes.map(i, j);
+						mapped.add(j);
+						if (i != j)
+							reorder = true;
+						break;
+					}
+				}
+			}
+			// update children if required
+			if (childContexts.length != oldCount || reorder || childContexts.length != indexes.size()) {
+				modified = true;
+				List<TreeNode> oldChildren = new ArrayList<TreeNode>(oldCount);
+				oldChildren.addAll(children);
+				if (childContexts.length >= oldCount) {
+    	    		for (int i = 0; i < oldCount; i++) {
+    	    			Integer oldIndex = indexes.getLeft(i);
+    	    			if (oldIndex == null) {
+    	    				setChild(i, childContexts[i], explorerContext);
+    	    			} else {
+    	    				TreeNode n = oldChildren.get(oldIndex);
+    	    				children.set(i, n);
+    	    			}
+    	    			
+    	    		}
+    	    		for (int i = oldCount; i < childContexts.length; i++) {
+    	    			Integer oldIndex = indexes.getLeft(i);
+    	    			if (oldIndex == null) {
+    	    				addChild(childContexts[i], explorerContext);
+    	    			} else {
+    	    				TreeNode n = oldChildren.get(oldIndex);
+    	    				children.add(n);
+    	    			}
+    	    		}
+        		} else {
+        			for (int i = 0; i < childContexts.length; i++) {
+        				Integer oldIndex = indexes.getLeft(i);
+    	    			if (oldIndex == null) {
+    	    				setChild(i, childContexts[i], explorerContext);
+    	    			} else {
+    	    				TreeNode n = oldChildren.get(oldIndex);
+    	    				children.set(i, n);
+    	    			}
+    	    		}
+        			for (int i = oldCount -1; i >= childContexts.length; i--) {
+        				children.remove(i);
+        			}
+        		}
+				for (int i = 0; i < oldChildren.size(); i++) {
+					if (!indexes.containsLeft(i)) {
+						oldChildren.get(i).dispose2();
+					}
+				}
+				
+			}
+    		
+		}
+		return modified;
+	}
+	
+	public boolean isDisposed() {
+		return context == null;
+	}
+	
+	public GENodeQueryManager getManager() {
+		return manager;
+	}
+	
+	@SuppressWarnings("rawtypes")
+	@Override
+	public Object getAdapter(Class adapter) {
+		if (adapter == NodeContext.class)
+			return context;
+		
+		return context.getAdapter(adapter);
+	}
+	
+	@Override
+	public String toString() {
+		return "TreeNode: " + listIndex + " " + (expanded ? "(+)" : "(-)") + " " + context ;
+	}
+
+}