sampling added

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/portlets/user/databases-manager-portlet@98365 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/user/databasesmanager/client/GWTdbManagerService.java

@@ -33,6 +33,8 @@ public interface GWTdbManagerService extends RemoteService {
 			String query, boolean valueReadOnlyQuery,
 			boolean smartCorrectionQuery, String language) throws Exception;
 	
+	List<Result> sample(LinkedHashMap<String, String> dataInput) throws Exception;
+
 	List<Row> parseCVSString(List<Result> result, List<String> attrNames)
 			throws Exception;
 

src/main/java/org/gcube/portlets/user/databasesmanager/client/GWTdbManagerServiceAsync.java

@@ -33,4 +33,7 @@ public interface GWTdbManagerServiceAsync {
 	void parseCVSString(List<Result> result, List<String> attrNames,
 			AsyncCallback<List<Row>> callback);
 
+	void sample(LinkedHashMap<String, String> dataInput,
+			AsyncCallback<List<Result>> callback);
+
 }

src/main/java/org/gcube/portlets/user/databasesmanager/client/datamodel/FileModel.java

@@ -12,7 +12,7 @@ public class FileModel extends BaseModelData implements Serializable {
 	private static int ID = 0;
 	// private int id;
 	private boolean isExpanded = true;
-	// private boolean isSchema = false;
+//	private boolean isSchema = false;
 	private boolean isLoaded = false;
 	// private boolean isTable = false;
 	private boolean isDatabase = false;

src/main/java/org/gcube/portlets/user/databasesmanager/client/events/EventsTypeEnum.java

@@ -4,6 +4,7 @@ public enum EventsTypeEnum {
 	
 	SELECTED_ITEM_EVENT,
 	SUBMIT_QUERY_EVENT,
-	SHOW_CREATE_TABLE_EVENT;
+	SHOW_CREATE_TABLE_EVENT,
+	SAMPLING_EVENT;
 	
 }

src/main/java/org/gcube/portlets/user/databasesmanager/client/events/SamplingEvent.java

@@ -0,0 +1,32 @@
+package org.gcube.portlets.user.databasesmanager.client.events;
+
+import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SamplingEventHandler;
+
+import com.google.gwt.event.shared.GwtEvent;
+
+public class SamplingEvent extends GwtEvent<SamplingEventHandler> {
+
+	public static Type<SamplingEventHandler> TYPE = new Type<SamplingEventHandler>();
+
+	@Override
+	public Type<SamplingEventHandler> getAssociatedType() {
+		// TODO Auto-generated method stub
+		return TYPE;
+	}
+
+	@Override
+	protected void dispatch(SamplingEventHandler handler) {
+		// TODO Auto-generated method stub
+
+		handler.onSampling(this);
+
+	}
+
+	public EventsTypeEnum getKey() {
+
+		// TODO Auto-generated method stub
+		return EventsTypeEnum.SAMPLING_EVENT;
+	}
+
+}
+

src/main/java/org/gcube/portlets/user/databasesmanager/client/events/SelectedItemEvent.java

@@ -8,7 +8,7 @@ import com.google.gwt.event.shared.GwtEvent;
 
 //"SelectedItemEvent" event definition
 
-public class SelectedItemEvent extends GwtEvent<SelectedItemEventHandler> {
+ public class SelectedItemEvent extends GwtEvent<SelectedItemEventHandler> {
 
 	public static Type<SelectedItemEventHandler> TYPE = new Type<SelectedItemEventHandler>();
 

src/main/java/org/gcube/portlets/user/databasesmanager/client/events/interfaces/SamplingEventHandler.java

@@ -0,0 +1,10 @@
+package org.gcube.portlets.user.databasesmanager.client.events.interfaces;
+
+import org.gcube.portlets.user.databasesmanager.client.events.SamplingEvent;
+
+
+import com.google.gwt.event.shared.EventHandler;
+
+public interface SamplingEventHandler extends EventHandler {
+	public void onSampling(SamplingEvent samplingEvent);
+}

src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtBorderLayoutPanel.java

@@ -1,7 +1,5 @@
 package org.gcube.portlets.user.databasesmanager.client.panels;
 
-
-
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -13,8 +11,10 @@ import org.gcube.portlets.user.databasesmanager.client.datamodel.FileModel;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.Result;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.Row;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.SubmitQueryData;
+import org.gcube.portlets.user.databasesmanager.client.events.SamplingEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.SelectedItemEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.SubmitQueryEvent;
+import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SamplingEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SelectedItemEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SubmitQueryEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.toolbar.GxtToolbarFunctionality;
@@ -76,6 +76,9 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 	// RPC service
 	private GWTdbManagerServiceAsync RPCservice = null;
 
+	// variable that keeps track of the managed event
+	private boolean submitQueryEventManaged = false;
+
 	public GxtBorderLayoutPanel(HandlerManager eBus,
 			GWTdbManagerServiceAsync service) throws Exception {
 
@@ -97,6 +100,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 	private void initLayout() {
 		
+		
+
 		north.setLayout(new FitLayout());
 		north.setTopComponent(toolbar.getToolBar());
 		north.add(toolbar.getToolBar());
@@ -197,23 +202,23 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 					public void onSelectedItem(
 							SelectedItemEvent selectedItemEvent) {
 
-//						System.out
+						// System.out
-//								.println("GxtBorderLayoutPanel: Event received");
+						// .println("GxtBorderLayoutPanel: Event received");
 
 						rootLogger.log(Level.SEVERE, "Event received");
 
 						int DepthSelectedItem = treePanel
 								.getTreeDepthSelectedItem();
 
-//						System.out.println("GxtBorderLayoutPanel-> Depth: "
+						// System.out.println("GxtBorderLayoutPanel-> Depth: "
-//								+ DepthSelectedItem);
+						// + DepthSelectedItem);
 
 						// element name selected
 						String text = treePanel.getValue();
 
-//						System.out
+						// System.out
-//								.println("GxtBorderLayoutPanel-> item selected: "
+						// .println("GxtBorderLayoutPanel-> item selected: "
-//										+ text);
+						// + text);
 
 						rootLogger.log(Level.INFO, "item selected: " + text);
 
@@ -238,9 +243,9 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 							// show database information in the panel
 
-//							List<FileModel> data = treePanel.getTreePanel()
+							// List<FileModel> data = treePanel.getTreePanel()
-//									.getSelectionModel().getSelectedItems();
+							// .getSelectionModel().getSelectedItems();
-//							FileModel selectedItem = data.get(0);
+							// FileModel selectedItem = data.get(0);
 
 							FileModel parent = treePanel.getTreeStore()
 									.getParent(selectedItem);
@@ -252,9 +257,10 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 						}
 
-						//display the table name in the right panel when a table is selected
+						// display the table name in the right panel when a
+						// table is selected
 
-						if (DepthSelectedItem == 5){
+						if (DepthSelectedItem == 5) {
 
 							centerUpper.removeAll();
 
@@ -264,7 +270,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 						}
 
-						if ((DepthSelectedItem == 4) && (data.get(0).isSchema() == false)){
+						if ((DepthSelectedItem == 4)
+								&& (data.get(0).isSchema() == false)) {
 
 							centerUpper.removeAll();
 
@@ -274,8 +281,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 						}
 
-//						System.out
+						// System.out
-//								.println("GxtBorderLayoutPanel: Event finished");
+						// .println("GxtBorderLayoutPanel: Event finished");
 
 						rootLogger.log(Level.SEVERE, "Event finished");
 
@@ -290,24 +297,44 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 					public void onSubmitQuery(SubmitQueryEvent submitQueryEvent) {
 						// TODO Auto-generated method stub
 
-						try {
+						// try {
+						// submitQuery();
+						// } catch (Exception e) {
+						// // TODO Auto-generated catch block
+						// e.printStackTrace();
+						// }
+
 						submitQuery();
-						} catch (Exception e) {
+
-							// TODO Auto-generated catch block
-							e.printStackTrace();
 					}
+				});
+
+		eventBus.addHandler(SamplingEvent.TYPE, new SamplingEventHandler() {
+			
+			
+
+			@Override
+			public void onSampling(SamplingEvent samplingEvent) {
+				// TODO Auto-generated method stub
+
+				sample();
+				
+				
 
 			}
 		});
 
 	}
 
-	private void submitQuery() throws Exception {
+	private void submitQuery() {
 
-//		System.out.println("Start RPC - submitQuery");
+		// System.out.println("Start RPC - submitQuery");
 
 		rootLogger.log(Level.SEVERE, "Start RPC - submitQuery");
 
+		// variable that keeps track of the managed event
+		submitQueryEventManaged = false;
+
 		// recover input data
 
 		LinkedHashMap<String, String> dataDB = treePanel
@@ -330,13 +357,14 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 		if (selectedItem.isDatabase()) { // the selected item is a database
 
-//			System.out.println("the selected item is a database");
+			// System.out.println("the selected item is a database");
 			rootLogger.log(Level.INFO, "the selected item is a database");
 
 			// determine the dialect recovering the dialect
 			dialect = selectedItem.getDBInfo().get(2).getValue();
 
-			rootLogger.log(Level.INFO, "determined Dialect for smart correction: " + dialect);
+			rootLogger.log(Level.INFO,
+					"determined Dialect for smart correction: " + dialect);
 
 		} else {
 			FileModel parent1 = treePanel.getTreeStore()
@@ -344,20 +372,21 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 			if (parent1.isDatabase()) { // the selected item is a schema
 
-//				System.out.println("the selected item is a schema");
+				// System.out.println("the selected item is a schema");
 
 				rootLogger.log(Level.INFO, "the selected item is a schema");
 
 				// determine the dialect recovering the dialect
 				dialect = parent1.getDBInfo().get(2).getValue();
 
-				rootLogger.log(Level.INFO, "determined Dialect for smart correction: " + dialect);
+				rootLogger.log(Level.INFO,
+						"determined Dialect for smart correction: " + dialect);
 
 			}
 
 			else { // the selected item is a table
 
-//				System.out.println("the selected item is a table");
+				// System.out.println("the selected item is a table");
 
 				rootLogger.log(Level.INFO, "the selected item is a table");
 
@@ -366,7 +395,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 				// determine the dialect recovering the dialect
 				dialect = parent2.getDBInfo().get(2).getValue();
 
-				rootLogger.log(Level.INFO, "determined Dialect for smart correction: " + dialect);
+				rootLogger.log(Level.INFO,
+						"determined Dialect for smart correction: " + dialect);
 
 			}
 
@@ -384,7 +414,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 			language = ConstantsPortlet.MYSQL;
 		}
 
-		rootLogger.log(Level.INFO, "Dialect used for smart correction: " + language);
+		rootLogger.log(Level.INFO, "Dialect used for smart correction: "
+				+ language);
 
 		RPCservice.submitQuery(dataDB, dataQuery.getQuery(), true,
 				dataQuery.getSmartCorrection(), language,
@@ -399,32 +430,33 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 					@Override
 					public void onFailure(Throwable caught) {
 
-//						Window.alert(caught.getMessage());
+						// Window.alert(caught.getMessage());
 
-//						System.out.println("FAILURE submitQuery");
+						// System.out.println("FAILURE submitQuery");
 
 						rootLogger.log(Level.SEVERE, "FAILURE RPC submitQuery");
 
 						Listener<MessageBoxEvent> l = new Listener<MessageBoxEvent>() {
 							public void handleEvent(MessageBoxEvent ce) {
-//						        Button btn = ce.getButtonClicked();  
+								// Button btn = ce.getButtonClicked();
-//						        Info.display("MessageBox", "The '{0}' button was pressed", btn.getHtml()); 
+								// Info.display("MessageBox",
+								// "The '{0}' button was pressed",
+								// btn.getHtml());
 
-//						    	  Button btn = ce.getButtonClicked(); 
+								// Button btn = ce.getButtonClicked();
 
 								Dialog form = toolbar.getDialogForm();
 
 								if (form.isMasked())
 									form.unmask();
 
-						    	  
-						    	  
 							}
 						};
 
-//						MessageBox.alert("Error "," <br/>Cause:"+caught.getCause()+"<br/>Message:"+caught.getMessage(), l);
+						// MessageBox.alert("Error "," <br/>Cause:"+caught.getCause()+"<br/>Message:"+caught.getMessage(),
-						MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(), l);
+						// l);
-						
+						MessageBox.alert("Error ",
+								"<br/>Message:" + caught.getMessage(), l);
 
 					}
 
@@ -432,21 +464,20 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 					public void onSuccess(List<Result> result) {
 						// TODO Auto-generated method stub
 
-//						System.out.println("SUCCESS submitQuery");
+						// System.out.println("SUCCESS submitQuery");
 
 						rootLogger.log(Level.SEVERE, "SUCCESS RPC submitQuery");
 
 						rows = new ArrayList<Row>();
 
+						// System.out.println("result size: " + result.size());
 
-//						System.out.println("result size: " + result.size());
+						rootLogger.log(Level.SEVERE,
-						
+								"output size: " + result.size());
-						rootLogger.log(Level.SEVERE, "output size: " + result.size());
 
 						// recover query
 						// Result query = result.remove(0);
 
-						
 						// recover converted query
 						Result convertedQuery;
 
@@ -463,7 +494,112 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 						// remove the header in order to parse only the result
 						result.remove(0);
 
-						//parse the result in order to obtain a table
+						// variable that keeps track of the managed event
+						submitQueryEventManaged = true;
+
+						// parse the result in order to obtain a table
+						parseResult(result);
+
+					}
+
+				});
+
+	}
+
+	private void sample() {
+		
+//		this.mask();
+
+		// System.out.println("Start RPC - submitQuery");
+
+		rootLogger.log(Level.SEVERE, "Start RPC - sample");
+
+		// get the selected table
+
+		List<FileModel> data = treePanel.getTreePanel().getSelectionModel()
+				.getSelectedItems();
+
+		// the selected item is a table
+		FileModel selectedItem = data.get(0);
+
+		rootLogger.log(Level.INFO, "the selected table is: " + selectedItem);
+
+		// recover data inputs
+
+		LinkedHashMap<String, String> dataInput = new LinkedHashMap<String, String>();
+
+		// check if the table has an associated schema
+		FileModel schema;
+		FileModel database;
+		FileModel resource;
+
+		if (treePanel.getTreeStore().getParent(selectedItem).isSchema()) {
+			schema = treePanel.getTreeStore().getParent(selectedItem);
+			database = treePanel.getTreeStore().getParent(schema);
+			resource = treePanel.getTreeStore().getParent(database);
+
+			dataInput.put("ResourceName", resource.getName());
+			dataInput.put("DatabaseName", database.getName());
+			dataInput.put("SchemaName", schema.getName());
+			dataInput.put("TableName", selectedItem.getName());
+
+			rootLogger.log(Level.INFO, "ResourceName: " + resource.getName());
+			rootLogger.log(Level.INFO, "DatabaseName: " + database.getName());
+			rootLogger.log(Level.INFO, "SchemaName: " + schema.getName());
+			rootLogger.log(Level.INFO, "SchemaName: " + selectedItem.getName());
+
+		} else {
+			// the table has not a schema
+			database = treePanel.getTreeStore().getParent(selectedItem);
+			resource = treePanel.getTreeStore().getParent(database);
+
+			dataInput.put("ResourceName", resource.getName());
+			dataInput.put("DatabaseName", database.getName());
+			dataInput.put("SchemaName", "");
+			dataInput.put("TableName", selectedItem.getName());
+
+			rootLogger.log(Level.INFO, "ResourceName: " + resource.getName());
+			rootLogger.log(Level.INFO, "DatabaseName: " + database.getName());
+			rootLogger.log(Level.INFO, "SchemaName: " + "");
+			rootLogger.log(Level.INFO, "SchemaName: " + selectedItem.getName());
+		}
+
+		// call remote service
+
+		RPCservice.sample(dataInput, new AsyncCallback<List<Result>>() {
+
+			@Override
+			public void onFailure(Throwable caught) {
+
+//				Window.alert(caught.getMessage());
+				// System.out.println("FAILURE");
+				rootLogger.log(Level.SEVERE, "FAILURE RPC sample");
+
+				MessageBox.alert("Error ",
+						"<br/>Message:" + caught.getMessage(), null);
+
+			}
+
+			@Override
+			public void onSuccess(List<Result> result) {
+
+				rootLogger.log(Level.SEVERE, "SUCCESS RPC sample");
+				
+				
+
+				rows = new ArrayList<Row>();
+
+				// System.out.println("result size: " + result.size());
+
+				rootLogger.log(Level.SEVERE, "output size: " + result.size());
+
+				// get the attributes list for the result table
+				getListAttributes(result.get(0).getValue());
+
+				// remove the header in order to parse only the result
+				result.remove(0);
+
+				// parse the result in order to obtain a table
 				parseResult(result);
 
 			}
@@ -475,6 +611,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 	// start the parsing of the submit result in order to obtain a table
 	private void parseResult(List<Result> result) {
 		
+		
+
 		RPCservice.parseCVSString(result, listAttributes,
 				new AsyncCallback<List<Row>>() {
 
@@ -483,7 +621,7 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 						// TODO Auto-generated method stub
 
 						Window.alert(caught.getMessage());
-//						System.out.println("FAILURE StartParse");
+						// System.out.println("FAILURE StartParse");
 
 						rootLogger.log(Level.SEVERE, "FAILURE RPC parseResult");
 
@@ -492,22 +630,37 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 					@Override
 					public void onSuccess(List<Row> rows) {
 						
-//						System.out.println("Success StartParse");
+						
+
+						// System.out.println("Success StartParse");
 
 						rootLogger.log(Level.SEVERE, "SUCCESS RPC parseResult");
 
-						if (rows != null) {
+						if (submitQueryEventManaged == true) {
 
 							Dialog form = toolbar.getDialogForm();
 
 							if (form.isMasked())
 								form.unmask();
 
-							
 							form.hide();
 							
 							
 
+						} 
+						
+						
+//						else {
+
+							if (rows != null) {
+
+								// Dialog form = toolbar.getDialogForm();
+								//
+								// if (form.isMasked())
+								// form.unmask();
+								//
+								// form.hide();
+
 								// Display the submit query result as a table
 								Dialog submitResult = new Dialog();
 								submitResult.setLayout(new FitLayout());
@@ -550,6 +703,8 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 								submitResult.show();
 
 							}
+//						}
+							
 					}
 
 				});
@@ -585,23 +740,22 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 		// recover attribute fields fo the result table
 		String headers = value;
 
-//		System.out.println("headers: " + headers);
+		// System.out.println("headers: " + headers);
 
 		rootLogger.log(Level.INFO, "Headers fields table: " + headers);
 
 		listAttributes = parseAttributesTableResult(headers);
 
+		// System.out.println("attributes number: " + listAttributes.size());
 
-
+		rootLogger.log(Level.INFO,
-//		System.out.println("attributes number: " + listAttributes.size());
+				"attributes number: " + listAttributes.size());
-		
-		rootLogger.log(Level.INFO, "attributes number: " + listAttributes.size());
 
 		rootLogger.log(Level.INFO, "attributes list: ");
 
 		for (int i = 0; i < listAttributes.size(); i++) {
 
-//			System.out.println(listAttributes.get(i));
+			// System.out.println(listAttributes.get(i));
 
 			rootLogger.log(Level.INFO, "attribute: " + listAttributes.get(i));
 
@@ -625,7 +779,7 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 		for (int i = 0; i < listAttributes.size(); i++) {
 
-//			System.out.println("attribute: " + listAttributes.get(i));
+			// System.out.println("attribute: " + listAttributes.get(i));
 			rootLogger.log(Level.INFO, "attribute: " + listAttributes.get(i));
 			column = new ColumnConfig();
 			column.setId(listAttributes.get(i));
@@ -702,7 +856,7 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 	private void displayDBInfo(FileModel element) {
 
-//		System.out.println("GxtBorderLayout->displaying info");
+		// System.out.println("GxtBorderLayout->displaying info");
 
 		rootLogger.log(Level.INFO, "displaying info");
 
@@ -710,7 +864,7 @@ public class GxtBorderLayoutPanel extends ContentPanel {
 
 		List<Result> dataDB = element.getDBInfo();
 
-//		System.out.println("GxtBorderLayout->size info: " + dataDB.size());
+		// System.out.println("GxtBorderLayout->size info: " + dataDB.size());
 
 		rootLogger.log(Level.INFO, "info size: " + dataDB.size());
 

src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtTreePanel.java

@@ -1,7 +1,5 @@
 package org.gcube.portlets.user.databasesmanager.client.panels;
 
-
-
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -151,7 +149,7 @@ public class GxtTreePanel extends LayoutContainer {
 					public void selectionChanged(
 							SelectionChangedEvent<FileModel> se) {
 
-//						System.out.println("SelectionChangedListener");
+						// System.out.println("SelectionChangedListener");
 
 						dataDBInfo = null;
 
@@ -174,21 +172,27 @@ public class GxtTreePanel extends LayoutContainer {
 																	// element
 																	// selected
 
+						FileModel selectedItem = data.get(0);
+
 						value = data.get(0).get("name");
 
-//						System.out.println("GxtTreePanel Value: "
+						// System.out.println("GxtTreePanel Value: "
-//								+ data.get(0).get("name"));
+						// + data.get(0).get("name"));
 
-						rootLogger.log(Level.INFO, "GxtTreePanel-> selectedItem value: " + value);
+						rootLogger.log(Level.INFO,
+								"GxtTreePanel-> selectedItem value: " + value);
 
-//						System.out.println("GxtTreePanel Depth: "
+						// System.out.println("GxtTreePanel Depth: "
-//								+ store.getDepth(data.get(0)));
+						// + store.getDepth(data.get(0)));
 
 						treeDepthSelectedItem = store.getDepth(data.get(0));
 
-//						rootLogger.log(Level.INFO, "GxtTreePanel-> selectedItem level depth: " + treeDepthSelectedItem);
+						// rootLogger.log(Level.INFO,
+						// "GxtTreePanel-> selectedItem level depth: " +
+						// treeDepthSelectedItem);
 
-						rootLogger.log(Level.INFO, "selectedItem level depth: " + treeDepthSelectedItem);
+						rootLogger.log(Level.INFO, "selectedItem level depth: "
+								+ treeDepthSelectedItem);
 
 						int numChildrenFolder = store.getChildCount(data.get(0));
 
@@ -197,9 +201,12 @@ public class GxtTreePanel extends LayoutContainer {
 
 						setInfoOnSelectedItem(data.get(0));
 
+						// check to make the RPC call once
 						if ((numChildrenFolder == 0)
 								&& (data.get(0).isLoaded() != true)) {
+							
 							treePanel.mask("Loading", "x-mask-loading");
+//							selectedItem.setIsSchema(false);
 
 							switch (treeDepthSelectedItem) {
 							// case 1:
@@ -208,20 +215,27 @@ public class GxtTreePanel extends LayoutContainer {
 							// break;
 
 							case 2:
+//								selectedItem.setIsSchema(false);
 								loadDBInfo(data.get(0));
 								break;
 
 							case 3:
+//								selectedItem.setIsSchema(false);
 								loadSchema(data.get(0));
 								break;
 
 							case 4:
+//								selectedItem.setIsSchema(false);
 								loadTables(data.get(0));
 								break;
 
 							}
 						}
 						
+						else{
+							setInfoOnSelectedItem(data.get(0));
+						}
+
 						// fire event
 						eventBus.fireEvent(new SelectedItemEvent());
 
@@ -232,11 +246,10 @@ public class GxtTreePanel extends LayoutContainer {
 
 	private void loadRootItemTree() throws Exception {
 
-//		treePanel.mask("Loading", "x-mask-loading");
+		// treePanel.mask("Loading", "x-mask-loading");
 
 		this.mask("Loading", "x-mask-loading");
 
-
 		final FileModel root = new FileModel("Resources");
 		store.insert(root, 0, true);
 
@@ -259,9 +272,10 @@ public class GxtTreePanel extends LayoutContainer {
 
 	private void loadResources(final FileModel element, final GxtTreePanel tree) {
 
-//		System.out.println("Start RPC - getResources");
+		// System.out.println("Start RPC - getResources");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getResource");
+		// rootLogger.log(Level.SEVERE,
+		// "GxtTreePanel-> Start RPC - getResource");
 		rootLogger.log(Level.SEVERE, "Start RPC - getResource");
 
 		// call remote service
@@ -271,14 +285,16 @@ public class GxtTreePanel extends LayoutContainer {
 			@Override
 			public void onFailure(Throwable caught) {
 
-				Window.alert(caught.getMessage());
+				// Window.alert(caught.getMessage());
-//				System.out.println("FAILURE");
+				// System.out.println("FAILURE");
 
-//				rootLogger.log(Level.SEVERE, "GxtTreePanel-> FAILURE RPC getResource");
+				// rootLogger.log(Level.SEVERE,
+				// "GxtTreePanel-> FAILURE RPC getResource");
 
 				rootLogger.log(Level.SEVERE, "FAILURE RPC getResource");
 
-				MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(), null);
+				MessageBox.alert("Error ",
+						"<br/>Message:" + caught.getMessage(), null);
 
 			}
 
@@ -288,23 +304,26 @@ public class GxtTreePanel extends LayoutContainer {
 				if (tree.isMasked())
 					tree.unmask();
 
-//				if (treePanel.isMasked())
+				// if (treePanel.isMasked())
-//					treePanel.unmask();
+				// treePanel.unmask();
 
-//				System.out.println("SUCCESS");
+				// System.out.println("SUCCESS");
 
-//				rootLogger.log(Level.SEVERE, "GxtTreePanel-> SUCCESS RPC getResource");
+				// rootLogger.log(Level.SEVERE,
+				// "GxtTreePanel-> SUCCESS RPC getResource");
 
 				rootLogger.log(Level.SEVERE, "SUCCESS RPC getResource");
 
 				// print check
 				for (int i = 0; i < result.size(); i++) {
 
-//					System.out.println(result.get(i).getName());
+					// System.out.println(result.get(i).getName());
 
-//					rootLogger.log(Level.INFO, "GxtTreePanel-> Resource: " + result.get(i).getName());
+					// rootLogger.log(Level.INFO, "GxtTreePanel-> Resource: " +
+					// result.get(i).getName());
 
-					rootLogger.log(Level.INFO, "Resource: " + result.get(i).getName());
+					rootLogger.log(Level.INFO, "Resource: "
+							+ result.get(i).getName());
 
 				}
 
@@ -318,22 +337,21 @@ public class GxtTreePanel extends LayoutContainer {
 
 		});
 
-//		System.out.println("End RPC - getResources");
+		// System.out.println("End RPC - getResources");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getResource");
+		// rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getResource");
 
 		rootLogger.log(Level.SEVERE, "End RPC - getResource");
 	}
 
 	private void loadDBInfo(final FileModel element) {
 
-//		System.out.println("Start RPC - getDBInfo");
+		// System.out.println("Start RPC - getDBInfo");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getDBInfo");
+		// rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getDBInfo");
 
 		rootLogger.log(Level.SEVERE, "Start RPC - getDBInfo");
 
-
 		// call remote service
 
 		RPCservice.getDBInfo(element.getName(),
@@ -342,15 +360,16 @@ public class GxtTreePanel extends LayoutContainer {
 					@Override
 					public void onFailure(Throwable caught) {
 
-						Window.alert(caught.getMessage());
+						// Window.alert(caught.getMessage());
-//						System.out.println("FAILURE");
+						// System.out.println("FAILURE");
 
-//						rootLogger.log(Level.SEVERE, "GxtTreePanel-> FAILURE RPC getDBInfo");
+						// rootLogger.log(Level.SEVERE,
+						// "GxtTreePanel-> FAILURE RPC getDBInfo");
 
 						rootLogger.log(Level.SEVERE, "FAILURE RPC getDBInfo");
 
-						MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(), null);
+						MessageBox.alert("Error ",
-						
+								"<br/>Message:" + caught.getMessage(), null);
 
 					}
 
@@ -361,9 +380,10 @@ public class GxtTreePanel extends LayoutContainer {
 						if (treePanel.isMasked())
 							treePanel.unmask();
 
-//						System.out.println("SUCCESS");
+						// System.out.println("SUCCESS");
 
-//						rootLogger.log(Level.SEVERE, "GxtTreePanel-> SUCCESS RPC getDBInfo");
+						// rootLogger.log(Level.SEVERE,
+						// "GxtTreePanel-> SUCCESS RPC getDBInfo");
 
 						rootLogger.log(Level.SEVERE, "SUCCESS RPC getDBInfo");
 
@@ -375,7 +395,8 @@ public class GxtTreePanel extends LayoutContainer {
 
 							Object[] array = keys.toArray();
 
-//							System.out.println("array size: " + array.length);
+							// System.out.println("array size: " +
+							// array.length);
 
 							// recover information for each database
 
@@ -465,12 +486,17 @@ public class GxtTreePanel extends LayoutContainer {
 
 						}
 
-//						System.out.println("children number: "
+						// System.out.println("children number: "
-//								+ store.getChildCount(element));
+						// + store.getChildCount(element));
 
-//						rootLogger.log(Level.INFO, "GxtTreePanel-> children number: " + store.getChildCount(element));
+						// rootLogger.log(Level.INFO,
+						// "GxtTreePanel-> children number: " +
+						// store.getChildCount(element));
 
-						rootLogger.log(Level.INFO, "children number: " + store.getChildCount(element));
+						rootLogger.log(
+								Level.INFO,
+								"children number: "
+										+ store.getChildCount(element));
 
 						element.setIsLoaded(true);
 
@@ -481,9 +507,9 @@ public class GxtTreePanel extends LayoutContainer {
 
 				});
 
-//		System.out.println("End RPC - getDBInfo");
+		// System.out.println("End RPC - getDBInfo");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getDBInfo");
+		// rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getDBInfo");
 
 		rootLogger.log(Level.SEVERE, "End RPC - getDBInfo");
 
@@ -491,9 +517,10 @@ public class GxtTreePanel extends LayoutContainer {
 
 	private void loadSchema(final FileModel element) {
 
-//		System.out.println("Start RPC - getSchema");
+		// System.out.println("Start RPC - getSchema");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getDBSchema");
+		// rootLogger.log(Level.SEVERE,
+		// "GxtTreePanel-> Start RPC - getDBSchema");
 
 		rootLogger.log(Level.SEVERE, "Start RPC - getDBSchema");
 
@@ -512,37 +539,42 @@ public class GxtTreePanel extends LayoutContainer {
 
 			@Override
 			public void onFailure(Throwable caught) {
-				Window.alert(caught.getMessage());
+				// Window.alert(caught.getMessage());
-//				System.out.println("FAILURE");
+				// System.out.println("FAILURE");
 
-//				rootLogger.log(Level.SEVERE, "GxtTreePanel-> FAILURE RPC getDBSchema");
+				// rootLogger.log(Level.SEVERE,
+				// "GxtTreePanel-> FAILURE RPC getDBSchema");
 
 				rootLogger.log(Level.SEVERE, "FAILURE RPC getDBSchema");
 
-				MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(), null);
+				MessageBox.alert("Error ",
-				
+						"<br/>Message:" + caught.getMessage(), null);
 
 			}
 
 			@Override
 			public void onSuccess(List<FileModel> result) {
 
-				if (treePanel.isMasked())
-					treePanel.unmask();
 				
-//				System.out.println("SUCCESS");
 
-//				rootLogger.log(Level.SEVERE, "GxtTreePanel-> SUCCESS RPC getDBSchema");
+				// System.out.println("SUCCESS");
+
+				// rootLogger.log(Level.SEVERE,
+				// "GxtTreePanel-> SUCCESS RPC getDBSchema");
 
 				rootLogger.log(Level.SEVERE, "SUCCESS RPC getDBSchema");
 
-
 				if (result.size() == 0) { // the database has not schema
 
+//					element.setIsSchema(false);
+//					element.setIsLoaded(false);
 					loadTables(element);
 
 				} else {
 					
+					if (treePanel.isMasked())
+						treePanel.unmask();
+
 					// // print check
 					// for (int i = 0; i < result.size(); i++) {
 					// System.out.println(result.get(i).getName());
@@ -563,9 +595,9 @@ public class GxtTreePanel extends LayoutContainer {
 			}
 		});
 
-//		System.out.println("End RPC - getSchema");
+		// System.out.println("End RPC - getSchema");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getDBSchema");
+		// rootLogger.log(Level.SEVERE, "GxtTreePanel-> End RPC - getDBSchema");
 
 		rootLogger.log(Level.SEVERE, "End RPC - getDBSchema");
 
@@ -573,9 +605,9 @@ public class GxtTreePanel extends LayoutContainer {
 
 	private void loadTables(final FileModel element) {
 
-//		System.out.println("Start RPC - getTables");
+		// System.out.println("Start RPC - getTables");
 
-//		rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getTables");
+		// rootLogger.log(Level.SEVERE, "GxtTreePanel-> Start RPC - getTables");
 
 		rootLogger.log(Level.SEVERE, "Start RPC - getTables");
 
@@ -583,20 +615,70 @@ public class GxtTreePanel extends LayoutContainer {
 
 		LinkedHashMap<String, String> dataInput = new LinkedHashMap<String, String>();
 
-		FileModel parent = store.getParent(element);
+		// check if the element is a schema or a database
-		FileModel parent1 = store.getParent(parent);
 		
-		dataInput.put("ResourceName", parent1.getName());
+//		 System.out.println("element is a schema: " + element.isSchema());
-		dataInput.put("DatabaseName", parent.getName());
+//
+//		if (element.isSchema()) {
+//			
+//			 System.out.println("element is a schema: " + element.isSchema());
+//
+//			FileModel database = store.getParent(element);
+//			FileModel resource = store.getParent(database);
+//
+//			dataInput.put("ResourceName", resource.getName());
+//			dataInput.put("DatabaseName", database.getName());
+//			dataInput.put("SchemaName", element.getName());
+//			
+//			 System.out.println("schema name: " +  element.getName());
+//
+//			rootLogger.log(Level.INFO, "ResourceName: " + resource.getName());
+//			rootLogger.log(Level.INFO, "DatabaseName: " + database.getName());
+//			rootLogger.log(Level.INFO, "SchemaName: " + element.getName());
+//
+//			// System.out.println(parent1.getName());
+//			// System.out.println(parent.getName());
+//			// System.out.println(element.getName());
+//
+//		}
+//
+//		if (element.isDatabase()) {
+//			
+//			System.out.println("element is a database: " + element.isDatabase());
+//
+//			FileModel resource = store.getParent(element);
+//			// FileModel parent1 = store.getParent(parent);
+//
+//			dataInput.put("ResourceName", resource.getName());
+//			dataInput.put("DatabaseName", element.getName());
+//			dataInput.put("SchemaName", "");
+//
+//			rootLogger.log(Level.INFO, "ResourceName: " + resource.getName());
+//			rootLogger.log(Level.INFO, "DatabaseName: " + element.getName());
+//			rootLogger.log(Level.INFO, "SchemaName: " + "");
+//
+//			// System.out.println(parent1.getName());
+//			// System.out.println(parent.getName());
+//			// System.out.println(element.getName());
+//
+//		}
+		
+		FileModel database = store.getParent(element);
+		FileModel resource = store.getParent(database);
+
+		dataInput.put("ResourceName", resource.getName());
+		dataInput.put("DatabaseName", database.getName());
 		dataInput.put("SchemaName", element.getName());
 		
-		rootLogger.log(Level.INFO, "ResourceName: " + parent1.getName());
+		 System.out.println("schema name: " +  element.getName());
-		rootLogger.log(Level.INFO, "DatabaseName: " + parent.getName());
+
+		rootLogger.log(Level.INFO, "ResourceName: " + resource.getName());
+		rootLogger.log(Level.INFO, "DatabaseName: " + database.getName());
 		rootLogger.log(Level.INFO, "SchemaName: " + element.getName());
 
-//		System.out.println(parent1.getName());
+		// System.out.println(parent1.getName());
-//		System.out.println(parent.getName());
+		// System.out.println(parent.getName());
-//		System.out.println(element.getName());
+		// System.out.println(element.getName());
 
 		// call remote service
 
@@ -604,11 +686,25 @@ public class GxtTreePanel extends LayoutContainer {
 
 			@Override
 			public void onFailure(Throwable caught) {
-				Window.alert(caught.getMessage());
+				// Window.alert(caught.getMessage());
-//				System.out.println("FAILURE");
+				// System.out.println("FAILURE");
 				rootLogger.log(Level.SEVERE, "FAILURE RPC getTables");
 
-				MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(), null);
+				// no tables are available
+				if (caught.getMessage().equals(
+						"java.lang.Exception: Result not available")) {
+
+					element.setIsExpanded(false);
+					
+					treePanel.setExpanded(element, false);
+
+					if (treePanel.isMasked())
+						treePanel.unmask();
+
+				}
+
+				// MessageBox.alert("Error ","<br/>Message:"+caught.getMessage(),
+				// null);
 
 			}
 
@@ -618,13 +714,13 @@ public class GxtTreePanel extends LayoutContainer {
 				if (treePanel.isMasked())
 					treePanel.unmask();
 
-//				System.out.println("SUCCESS");
+				// System.out.println("SUCCESS");
 
 				rootLogger.log(Level.SEVERE, "SUCCESS RPC getTables");
 
 				if (result.size() == 0) { // the database has not tables
 
-//					System.out.println("the database has not tables");
+					// System.out.println("the database has not tables");
 
 					rootLogger.log(Level.SEVERE, "the database has not tables");
 
@@ -638,15 +734,23 @@ public class GxtTreePanel extends LayoutContainer {
 					for (int i = 0; i < result.size(); i++) {
 
 						result.get(i).setIsExpanded(false);
+						
 						result.get(i).setIsLoaded(true);
 						
-//						System.out.println(result.get(i).getName());
+						result.get(i).setIsSchema(false);
 						
-						rootLogger.log(Level.INFO, "table: " + result.get(i).getName());
+//						element.setIsLoaded(true);
+						
+						
+
+						// System.out.println(result.get(i).getName());
+
+						rootLogger.log(Level.INFO, "table: "
+								+ result.get(i).getName());
 
 					}
 
-//					int numChildrenFolder = store.getChildCount(element);
+					// int numChildrenFolder = store.getChildCount(element);
 
 					// if (numChildrenFolder == 0) {
 
@@ -657,11 +761,10 @@ public class GxtTreePanel extends LayoutContainer {
 
 				element.setIsLoaded(true);
 
-				
 			}
 		});
 
-//		System.out.println("End RPC - getTables");
+		// System.out.println("End RPC - getTables");
 
 		rootLogger.log(Level.SEVERE, "End RPC getTables");
 
@@ -689,7 +792,7 @@ public class GxtTreePanel extends LayoutContainer {
 
 			store.add(parent, children, true);
 
-//			System.out.println("Added children in store");
+			// System.out.println("Added children in store");
 
 			rootLogger.log(Level.INFO, "Added children in store");
 		}
@@ -730,7 +833,7 @@ public class GxtTreePanel extends LayoutContainer {
 																			// a
 																			// schema
 
-//			System.out.println("is a schema");
+			// System.out.println("is a schema");
 
 			rootLogger.log(Level.SEVERE, "setInfo for selected item schema");
 
@@ -766,7 +869,7 @@ public class GxtTreePanel extends LayoutContainer {
 																					// mysql
 																					// type
 
-//			System.out.println("is a table");
+			// System.out.println("is a table");
 
 			rootLogger.log(Level.SEVERE, "setInfo for selected item table");
 
@@ -790,7 +893,7 @@ public class GxtTreePanel extends LayoutContainer {
 													// so the database is
 													// postgres type
 
-//			System.out.println("is a table");
+			// System.out.println("is a table");
 
 			rootLogger.log(Level.SEVERE, "setInfo for selected item table");
 
@@ -818,7 +921,7 @@ public class GxtTreePanel extends LayoutContainer {
 		} else if (treeDepthSelectedItem == 3) { // the selected item is a
 													// database
 
-//			System.out.println("is a database");
+			// System.out.println("is a database");
 
 			rootLogger.log(Level.SEVERE, "setInfo for selected item database");
 

src/main/java/org/gcube/portlets/user/databasesmanager/client/toolbar/GxtToolbarFunctionality.java

@@ -7,6 +7,7 @@ import java.util.logging.Logger;
 
 import org.gcube.portlets.user.databasesmanager.client.GWTdbManagerServiceAsync;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.SubmitQueryData;
+import org.gcube.portlets.user.databasesmanager.client.events.SamplingEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.SubmitQueryEvent;
 import org.gcube.portlets.user.databasesmanager.client.form.GxtFormSubmitQuery;
 import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
@@ -211,26 +212,32 @@ public class GxtToolbarFunctionality {
 					public void componentSelected(ButtonEvent ce) {
 						// TODO Auto-generated method stub
 
-						// TODO: insert the result of the sample operation
 						
-						// TODO: manage the exception case (returned from
+						//fire event 
-						// algorithm "Simple Sample") with an alert
 						
-						// System.out.println("simple sample event");
+						eventBus.fireEvent(new SamplingEvent());
 						
-						Dialog d = new Dialog();
-						d.setHeading("Simple Sample");
 						
-						// d.setBodyStyle("fontWeight:bold;padding:13px;");
+//						// TODO: insert the result of the sample operation
-
+//
-						d.setBodyStyle("padding:9px;");
+//						// TODO: manage the exception case (returned from
-						d.setSize(600, 400);
+//						// algorithm "Simple Sample") with an alert
-						d.setScrollMode(Scroll.AUTO);
+//
-						d.setHideOnButtonClick(true);
+//						// System.out.println("simple sample event");
-						d.setModal(true);
+//
-						d.setMaximizable(true);
+//						Dialog d = new Dialog();
-						d.addText("Result Table 1");
+//						d.setHeading("Simple Sample");
-						d.show();
+//
+//						// d.setBodyStyle("fontWeight:bold;padding:13px;");
+//
+//						d.setBodyStyle("padding:9px;");
+//						d.setSize(600, 400);
+//						d.setScrollMode(Scroll.AUTO);
+//						d.setHideOnButtonClick(true);
+//						d.setModal(true);
+//						d.setMaximizable(true);
+//						d.addText("Result Table 1");
+//						d.show();
 
 					}
 

src/main/java/org/gcube/portlets/user/databasesmanager/server/GWTdbManagerServiceImpl.java

@@ -1,7 +1,5 @@
 package org.gcube.portlets.user.databasesmanager.server;
 
-
-
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -465,9 +463,9 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 		// retrieve data
 
-//		System.out.println("output data retrieved");
+		// System.out.println("output data retrieved");
 
-//		System.out.println("size outputMap: " + outputMap.size());
+		// System.out.println("size outputMap: " + outputMap.size());
 
 		rootLogger.log(Level.SEVERE, "output data retrieved");
 		rootLogger.log(Level.SEVERE, "output data size: " + outputMap.size());
@@ -501,6 +499,84 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 	}
 
+	@Override
+	public List<Result> sample(LinkedHashMap<String, String> dataInput)
+			throws Exception {
+
+		List<Parameter> inputParameters = new ArrayList<Parameter>();
+
+		// sample result
+		List<Result> output = new ArrayList<Result>();
+
+		// get list of algorithms
+
+		List<String> algorithms = new ArrayList<String>();
+
+		algorithms = getDatabaseManagerAlgorithms();
+
+		// get algorithmId
+
+		String algorithmId = null;
+
+		for (int i = 0; i < algorithms.size(); i++) {
+
+			if (algorithms.get(i).equals("SAMPLEONTABLE")) {
+
+				algorithmId = algorithms.get(i);
+
+				// System.out.println("algorithmId: " + algorithmId);
+
+				rootLogger.log(Level.SEVERE, "algorithmId: " + algorithmId);
+
+			}
+
+		}
+
+		// get input parameters of the algorithm
+
+		rootLogger.log(Level.SEVERE, "getting input parameters");
+
+		inputParameters = getParameters(algorithmId);
+
+		for (int i = 0; i < inputParameters.size(); i++) {
+
+			// System.out.println(inputParameters.get(i).getName());
+
+			rootLogger.log(Level.INFO, inputParameters.get(i).getName());
+
+		}
+
+		inputParameters.get(0).setValue(dataInput.get("ResourceName"));
+		inputParameters.get(1).setValue(dataInput.get("DatabaseName"));
+		inputParameters.get(2).setValue(dataInput.get("SchemaName"));
+		inputParameters.get(3).setValue(dataInput.get("TableName"));
+
+		// System.out.println("size outputMap pre computation: "
+		// + outputMap.size());
+
+		String computationId = startComputation(algorithmId, inputParameters);
+
+		// retrieve data
+
+		// System.out.println("output data retrieved");
+
+		// System.out.println("size outputMap: " + outputMap.size());
+
+		rootLogger.log(Level.SEVERE, "output data retrieved");
+		rootLogger.log(Level.SEVERE, "output data size: " + outputMap.size());
+
+		for (int i = 0; i < outputMap.size(); i++) {
+
+			Result row = new Result(outputKey.get(String.valueOf(i)),
+					outputMap.get(String.valueOf(i)));
+
+			output.add(row);
+
+		}
+
+		return output;
+	}
+
 	public List<Row> parseCVSString(List<Result> result, List<String> attrNames)
 			throws Exception {
 
@@ -557,7 +633,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 		String delimiter = ",";
 
-//		System.out.println("row: " + row);
+		// System.out.println("row: " + row);
 
 		List<String> elements = new ArrayList<String>();
 		String phrase = row;
@@ -602,7 +678,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 		elements.add(phrase);
 
-//		System.out.println("size: " + elements.size());
+		// System.out.println("size: " + elements.size());
 
 		return elements;
 
@@ -617,10 +693,10 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 		SMListGroupedAlgorithms groups = factory.getAlgorithms();
 
 		if (groups == null)
-//			System.out.println("GROUPS OF ALGORITHMS IS NULL!");
+			// System.out.println("GROUPS OF ALGORITHMS IS NULL!");
-			rootLogger.log(Level.SEVERE,"GROUPS OF ALGORITHMS IS NULL!");
+			rootLogger.log(Level.SEVERE, "GROUPS OF ALGORITHMS IS NULL!");
 		else
-//			System.out.println("GROUPS OF ALGORITHMS IS NOT NULL!");
+			// System.out.println("GROUPS OF ALGORITHMS IS NOT NULL!");
 			rootLogger.log(Level.SEVERE, "GROUPS OF ALGORITHMS IS NOT NULL!");
 
 		// get list categories
@@ -662,23 +738,20 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			String defaultValue = smParam.defaultValue();
 			String objectType = smType.values().get(0);
 
-//			System.out.println("GWTdbManagerServiceImpl->parameters");
+			// System.out.println("GWTdbManagerServiceImpl->parameters");
 
+			// CHECK
+			// rootLogger.log(Level.INFO, "parameters: ");
 
-			//CHECK
+			// rootLogger.log(Level.INFO, paramName);
-//			rootLogger.log(Level.INFO, "parameters: ");
+			// rootLogger.log(Level.INFO, paramDescription);
+			// rootLogger.log(Level.INFO, objectType);
+			// rootLogger.log(Level.INFO, defaultValue);
 
-//			rootLogger.log(Level.INFO, paramName);
+			// System.out.println(paramName);
-//			rootLogger.log(Level.INFO, paramDescription);
+			// System.out.println(paramDescription);
-//			rootLogger.log(Level.INFO, objectType);
+			// System.out.println(objectType);
-//			rootLogger.log(Level.INFO, defaultValue);
+			// System.out.println(defaultValue);
-			
-			
-
-//			System.out.println(paramName);
-//			System.out.println(paramDescription);
-//			System.out.println(objectType);
-//			System.out.println(defaultValue);
 
 			Parameter objectParam = new Parameter(paramName, paramDescription,
 					objectType, defaultValue);
@@ -727,7 +800,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 		} catch (Exception e) {
 
-//			e.printStackTrace();
+			// e.printStackTrace();
 			throw e;
 		}
 	}
@@ -751,7 +824,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 		if (status == SMOperationStatus.RUNNING) {
 
-//			System.out.println("GWTdbManagerServiceImpl->RUNNING");
+			// System.out.println("GWTdbManagerServiceImpl->RUNNING");
 
 			rootLogger.log(Level.SEVERE, "RUNNING");
 
@@ -766,7 +839,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 		} else if ((status == SMOperationStatus.COMPLETED)
 				|| (status == SMOperationStatus.FAILED)) {
 
-//			System.out.println("GWTdbManagerServiceImpl->COMPLETED OR FAILED");
+			// System.out.println("GWTdbManagerServiceImpl->COMPLETED OR FAILED");
 			rootLogger.log(Level.SEVERE, "COMPLETED OR FAILED");
 
 			SMAbstractResource abstractResource = computation
@@ -775,31 +848,32 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			int resourceTypeIndex = smResource.resourceType();
 			SMResourceType smResType = SMResourceType.values()[resourceTypeIndex];
 
-			//TODO: ECXEPTION  MANAGEMENT
+			// TODO: ECXEPTION MANAGEMENT
-//			if (SMResourceType.ERROR){
+			// if (SMResourceType.ERROR){
-//				
+			//
-//				
+			//
-//			}	
+			// }
-			//throws(smResource.description());
+			// throws(smResource.description());
 			displayOutput(smResource, smResType);
 
-//			System.out.println("GWTdbManagerServiceImpl-> SM resource Name: "
+			// System.out.println("GWTdbManagerServiceImpl-> SM resource Name: "
-//					+ smResource.name());
+			// + smResource.name());
 
-			rootLogger.log(Level.SEVERE, "SM resource Name: " + smResource.name());
+			rootLogger.log(Level.SEVERE,
+					"SM resource Name: " + smResource.name());
 
-//			System.out.println("GWTdbManagerServiceImpl-> SM resource ID: "
+			// System.out.println("GWTdbManagerServiceImpl-> SM resource ID: "
-//					+ smResource.resourceId());
+			// + smResource.resourceId());
 
-			rootLogger.log(Level.SEVERE, "SM resource ID: " + smResource.resourceId());
+			rootLogger.log(Level.SEVERE,
-			
+					"SM resource ID: " + smResource.resourceId());
-//			System.out
-//					.println("GWTdbManagerServiceImpl-> SM resource Description: "
-//							+ smResource.description());
-			
-			rootLogger.log(Level.SEVERE, "SM resource Description: " + smResource.description());
 
+			// System.out
+			// .println("GWTdbManagerServiceImpl-> SM resource Description: "
+			// + smResource.description());
 
+			rootLogger.log(Level.SEVERE, "SM resource Description: "
+					+ smResource.description());
 
 			percentage = 100;
 
@@ -811,7 +885,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 	private void displayOutput(SMResource smResource, SMResourceType smResType)
 			throws Exception {
 
-//		System.out.println("displayOutput");
+		// System.out.println("displayOutput");
 
 		rootLogger.log(Level.SEVERE, "displayOutput");
 
@@ -827,23 +901,23 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			// case OBJECT:
 			SMObject objRes = (SMObject) smResource;
 			if (objRes.name().contentEquals(PrimitiveTypes.MAP.toString())) {
-//				System.out.println("Output is a map");
+				// System.out.println("Output is a map");
 
 				rootLogger.log(Level.SEVERE, "Output is a map");
 				// Map<String, String> outputMap = getMap(objRes);
 				this.outputMap = (LinkedHashMap<String, String>) getMap(objRes);
 			} else if (objRes.name().contentEquals(
 					PrimitiveTypes.IMAGES.toString())) {
-//				System.out.println("Output are images");
+				// System.out.println("Output are images");
 				rootLogger.log(Level.SEVERE, "Output are images");
 			} else
-//				System.out.println("Output is other");
+				// System.out.println("Output is other");
 				rootLogger.log(Level.SEVERE, "Output is other");
 		}
 
-		//EXCEPTION  MANAGEMENT
+		// EXCEPTION MANAGEMENT
 
-		if(smResType.equals(SMResourceType.ERROR)) {
+		if (smResType.equals(SMResourceType.ERROR)) {
 			throw new Exception(smResource.description());
 
 		}
@@ -857,7 +931,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 	private Map<String, String> getMap(SMObject objRes) throws Exception {
 
-//		System.out.println("getMap");
+		// System.out.println("getMap");
 
 		rootLogger.log(Level.SEVERE, "getMap");
 
@@ -896,8 +970,8 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			int resourceTypeIndex = smres.resourceType();
 			SMResourceType smsubResType = SMResourceType.values()[resourceTypeIndex];
 
-//			System.out.println("GWTdbManagerServiceImpl-> ResourceType:"
+			// System.out.println("GWTdbManagerServiceImpl-> ResourceType:"
-//					+ smsubResType);
+			// + smsubResType);
 
 			rootLogger.log(Level.INFO, "ResourceType: " + smsubResType);
 
@@ -905,14 +979,15 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 				SMObject obje = (SMObject) smres;
 				String outstring = obje.url();
 
-//				System.out.println("key :" + key);
+				// System.out.println("key :" + key);
 
 				rootLogger.log(Level.INFO, "key: " + smsubResType);
 
-//				System.out.println("Object:"
+				// System.out.println("Object:"
-//						+ new String(outstring.getBytes(), "UTF-8"));
+				// + new String(outstring.getBytes(), "UTF-8"));
 
-				rootLogger.log(Level.INFO, "Object: " + new String(outstring.getBytes(), "UTF-8"));
+				rootLogger.log(Level.INFO,
+						"Object: " + new String(outstring.getBytes(), "UTF-8"));
 
 				// outputmap.put(key, outstring);
 
@@ -922,9 +997,10 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 		}
 
-//		System.out.println("Map retrieved with size: " + smMap.size());
+		// System.out.println("Map retrieved with size: " + smMap.size());
 
-		rootLogger.log(Level.SEVERE, "Map retrieved with size: " + smMap.size());
+		rootLogger
+				.log(Level.SEVERE, "Map retrieved with size: " + smMap.size());
 		return outputmap;
 	}
 
@@ -955,4 +1031,6 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 
 	}
 
+	
+
 }