Updated Replace by Expression

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/portlets/user/tabular-data-expression-widget@99996 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ReplaceColumnByExpressionDialog.java

@@ -35,8 +35,10 @@ import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
  */
 public class ReplaceColumnByExpressionDialog extends Window implements
 		MonitorDialogListener {
-	protected String WIDTH = "660px";
-	protected String HEIGHT = "400px";
+	protected static final String WIDTH = "660px";
+	protected static final String HEIGHT = "490px";
+	protected static final String HEIGHT_REDUCE = "404px";
+
 	protected ReplaceColumnByExpressionPanel replaceColumnByExpressionPanel;
 	protected C_Expression cConditionExpression = null;
 	protected C_Expression cReplaceExpression = null;
@@ -49,22 +51,22 @@ public class ReplaceColumnByExpressionDialog extends Window implements
 	public ReplaceColumnByExpressionDialog(String columnId,
 			ColumnTypeCode columnTypeCode, ColumnDataType dataTypeName,
 			EventBus eventBus) {
-		initWindow();
 		this.eventBus = eventBus;
 		column = new ColumnData();
 		column.setColumnId(columnId);
 		column.setDataTypeName(dataTypeName.toString());
 		column.setTypeCode(columnTypeCode.toString());
+		initWindow();
 		create();
 
 	}
 
 	public ReplaceColumnByExpressionDialog(TRId trId, String columnName,
 			EventBus eventBus) {
-		initWindow();
 		this.eventBus = eventBus;
 		this.trId = trId;
 		this.columnName = columnName;
+		initWindow();
 		load(trId, columnName);
 
 	}
@@ -98,6 +100,14 @@ public class ReplaceColumnByExpressionDialog extends Window implements
 	}
 
 	protected void create() {
+		if (column != null
+				&& column.getDataTypeName().compareTo(
+						ColumnDataType.Text.toString())==0) {
+			setHeight(HEIGHT);
+		} else {
+			setHeight(HEIGHT_REDUCE);
+		}
+		
 		if (column.getTypeCode()
 				.compareTo(ColumnTypeCode.ANNOTATION.toString()) == 0
 				|| column.getTypeCode().compareTo(
@@ -132,8 +142,8 @@ public class ReplaceColumnByExpressionDialog extends Window implements
 		this.cConditionExpression = exp;
 	}
 
-	protected void applyReplaceColumnByExpression(C_Expression cConditionExpression,
-			String replaceValue) {
+	protected void applyReplaceColumnByExpression(
+			C_Expression cConditionExpression, String replaceValue) {
 		this.cConditionExpression = cConditionExpression;
 		this.replaceValue = replaceValue;
 
@@ -142,8 +152,8 @@ public class ReplaceColumnByExpressionDialog extends Window implements
 		callApplyReplaceByExpression(replaceColumnByExpressionSession);
 	}
 
-	protected void applyReplaceColumnByExpression(C_Expression cConditionExpression,
-			C_Expression cReplaceExpression) {
+	protected void applyReplaceColumnByExpression(
+			C_Expression cConditionExpression, C_Expression cReplaceExpression) {
 		this.cConditionExpression = cConditionExpression;
 		this.cReplaceExpression = cReplaceExpression;
 		ReplaceColumnByExpressionSession replaceColumnByExpressionSession = new ReplaceColumnByExpressionSession(
@@ -181,7 +191,8 @@ public class ReplaceColumnByExpressionDialog extends Window implements
 
 	protected void callApplyReplaceByExpression(
 			ReplaceColumnByExpressionSession replaceColumnByExpressionSession) {
-		Log.debug("Replace Column By Expression Session "+replaceColumnByExpressionSession);
+		Log.debug("Replace Column By Expression Session "
+				+ replaceColumnByExpressionSession);
 
 		ExpressionServiceAsync.INSTANCE.startReplaceColumnByExpression(
 				replaceColumnByExpressionSession, new AsyncCallback<String>() {

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ReplaceColumnByExpressionPanel.java

@@ -46,12 +46,14 @@ import com.sencha.gxt.widget.core.client.form.TextField;
  */
 public class ReplaceColumnByExpressionPanel extends FramedPanel {
 	protected static final String WIDTH = "648px";
-	protected static final String HEIGHT = "364px";
+	protected static final String HEIGHT = "454px";
+	protected static final String HEIGHT_REDUCE = "368px";
+	
 	protected static final String CONDITIONWIDTH = "612px";
 	protected static final String CONDITIONHEIGHT = "120px";
 	protected static final String REPLACEWIDTH = "612px";
 	protected static final String REPLACEHEIGHT = "120px";
-	
+
 	protected EventBus eventBus;
 
 	protected ReplaceColumnByExpressionDialog parent;
@@ -65,7 +67,7 @@ public class ReplaceColumnByExpressionPanel extends FramedPanel {
 
 	private FieldSet conditionsFieldSet;
 	private ConditionWidget conditionWidget;
-	
+
 	private ReplaceWidget replaceWidget;
 	private TextField replaceValue;
 	private DateField replaceValueDate;
@@ -73,7 +75,6 @@ public class ReplaceColumnByExpressionPanel extends FramedPanel {
 	private VerticalLayoutContainer conditionsVerticalLayout;
 	private FieldLabel allRowsField;
 	private boolean allRows;
-	
 
 	public ReplaceColumnByExpressionPanel(
 			ReplaceColumnByExpressionDialog parent, ColumnData column,
@@ -89,7 +90,13 @@ public class ReplaceColumnByExpressionPanel extends FramedPanel {
 
 	protected void init() {
 		setWidth(WIDTH);
-		setHeight(HEIGHT);
+		if (column != null
+				&& column.getDataTypeName().compareTo(
+						ColumnDataType.Text.toString())==0) {
+			setHeight(HEIGHT);
+		} else {
+			setHeight(HEIGHT_REDUCE);
+		}
 		setBodyBorder(false);
 		setHeaderVisible(false);
 		// Important: fixed rendering of widgets
@@ -190,8 +197,10 @@ public class ReplaceColumnByExpressionPanel extends FramedPanel {
 		} else {
 			if (column.getDataTypeName().compareTo(
 					ColumnDataType.Text.toString()) == 0) {
-				replaceWidget=new ReplaceWidget(column, REPLACEWIDTH, REPLACEHEIGHT);
-				replaceValueFieldSetLayout.add(replaceWidget, new VerticalLayoutData(1, -1));
+				replaceWidget = new ReplaceWidget(column, REPLACEWIDTH,
+						REPLACEHEIGHT);
+				replaceValueFieldSetLayout.add(replaceWidget,
+						new VerticalLayoutData(1, -1));
 			} else {
 				replaceValue = new TextField();
 				replaceValue.setToolTip("Replace Value");
@@ -279,27 +288,40 @@ public class ReplaceColumnByExpressionPanel extends FramedPanel {
 							"Select a valid date as replace value!");
 					return;
 				}
-				parent.applyReplaceColumnByExpression(cConditionExpression, value);
-				
+				parent.applyReplaceColumnByExpression(cConditionExpression,
+						value);
+
 			}
 
 		} else {
 			if (column.getDataTypeName().compareTo(
 					ColumnDataType.Text.toString()) == 0) {
-				C_Expression replaceExpression=replaceWidget.getExpression();
-				parent.applyReplaceColumnByExpression(cConditionExpression, replaceExpression);
+				C_Expression cReplaceExpression = null;
+				try {
+					cReplaceExpression = replaceWidget.getExpression();
+					if(cReplaceExpression==null){
+						UtilsGXT3.alert("Attention", "Replace expression is not valid!");
+						return;
+					}
+				} catch (Throwable e) {
+					UtilsGXT3.alert("Attention", "Replace expression is not valid!");
+					return;
+				}
+				parent.applyReplaceColumnByExpression(cConditionExpression,
+						cReplaceExpression);
 			} else {
 				value = replaceValue.getCurrentValue();
 				if (checkValue(value)) {
-					parent.applyReplaceColumnByExpression(cConditionExpression, value);
+					parent.applyReplaceColumnByExpression(cConditionExpression,
+							value);
 				} else {
-					UtilsGXT3.alert("Error replace value", "Insert a valid value!");
+					UtilsGXT3.alert("Error replace value",
+							"Insert a valid value!");
 					return;
 				}
 			}
 		}
 
-		
 	}
 
 	private boolean checkValue(String value) {

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ReplaceWidget.java

@@ -3,6 +3,8 @@ package org.gcube.portlets.user.td.expressionwidget.client;
 import org.gcube.portlets.user.td.expressionwidget.client.properties.ReplaceElement;
 import org.gcube.portlets.user.td.expressionwidget.client.properties.ReplaceElementProperties;
 import org.gcube.portlets.user.td.expressionwidget.client.properties.ReplaceElementStore;
+import org.gcube.portlets.user.td.expressionwidget.shared.replace.ReplaceType;
+import org.gcube.portlets.user.td.expressionwidget.shared.replace.ReplaceTypeMap;
 import org.gcube.portlets.user.td.gwtservice.shared.tr.ColumnData;
 import org.gcube.portlets.user.td.widgetcommonevent.shared.expression.C_Expression;
 
@@ -11,11 +13,13 @@ import com.google.gwt.core.client.GWT;
 import com.google.gwt.event.logical.shared.SelectionEvent;
 import com.google.gwt.event.logical.shared.SelectionHandler;
 import com.sencha.gxt.cell.core.client.form.ComboBoxCell.TriggerAction;
+import com.sencha.gxt.core.client.dom.ScrollSupport.ScrollMode;
 import com.sencha.gxt.core.client.util.Margins;
 import com.sencha.gxt.core.client.util.ToggleGroup;
 import com.sencha.gxt.data.shared.ListStore;
 import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutData;
 import com.sencha.gxt.widget.core.client.container.HBoxLayoutContainer;
+import com.sencha.gxt.widget.core.client.container.MarginData;
 import com.sencha.gxt.widget.core.client.container.SimpleContainer;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
@@ -32,18 +36,58 @@ import com.sencha.gxt.widget.core.client.form.TextField;
  */
 public class ReplaceWidget extends SimpleContainer {
 
+	private static final String EMPTY_TEXT_TO_STRING = "to string...";
+	private static final String EMPTY_TEXT_FROM_STRING = "from string...";
+	private static final String EMPTY_TEXT_TO_INDEX = "to index...";
+	private static final String EMPTY_TEXT_FROM_INDEX = "from index...";
+	private static final String EMPTY_TEXT_REGEXP = "regexp...";
+	private static final String EMPTY_TEXT_INSERT_A_STRING = "insert a string...";
 	private ReplaceWidget thisCont;
+
 	protected static final String HEIGHT = "210px";
 	protected static final String WIDTH = "612px";
+	protected static final String COMBO_WIDTH = "150px";
 	protected FieldLabel matchLabel;
 	protected ToggleGroup groupMatch;
 
-	
 	protected VerticalLayoutContainer vert;
 	protected ColumnData column;
 
 	protected String readableExpression;
-	private TextField replaceValue;
+	private String itemIdComboConcat;
+	private String itemIdComboLeaf;
+	private String itemIdFirstArg;
+	private String itemIdSecondArg;
+	private String itemIdHoriz;
+
+	public class ExpressionContainer {
+		private C_Expression expression;
+		private String readableExpression;
+
+		public ExpressionContainer(C_Expression expression,
+				String readableExpression) {
+			super();
+			this.expression = expression;
+			this.readableExpression = readableExpression;
+		}
+
+		public C_Expression getExpression() {
+			return expression;
+		}
+
+		public void setExpression(C_Expression expression) {
+			this.expression = expression;
+		}
+
+		public String getReadableExpression() {
+			return readableExpression;
+		}
+
+		public void setReadableExpression(String readableExpression) {
+			this.readableExpression = readableExpression;
+		}
+
+	}
 
 	public ReplaceWidget(ColumnData column) {
 		super();
@@ -62,7 +106,7 @@ public class ReplaceWidget extends SimpleContainer {
 		setHeight(height);
 		forceLayoutOnResize = true;
 		thisCont = this;
-		
+
 		setup();
 		addBeforeShowHandler(new BeforeShowEvent.BeforeShowHandler() {
 
@@ -76,29 +120,44 @@ public class ReplaceWidget extends SimpleContainer {
 	}
 
 	protected void setup() {
+		itemIdComboConcat = "ComboConcat" + column.getName();
+		itemIdComboLeaf = "ComboLeaf" + column.getName();
+		itemIdFirstArg = "FirstArg" + column.getName();
+		itemIdSecondArg = "SecondArg" + column.getName();
+		itemIdHoriz = "Horiz" + column.getName();
+
 		vert = new VerticalLayoutContainer();
-		
-		
+		vert.setScrollMode(ScrollMode.AUTO);
+
 		final HBoxLayoutContainer horiz = new HBoxLayoutContainer();
 
-		//
+		final TextField firstArg = new TextField();
+		firstArg.setEmptyText("Insert a string");
+		firstArg.setItemId(itemIdFirstArg);
+
+		final TextField secondArg = new TextField();
+		secondArg.setEmptyText("");
+		secondArg.setItemId(itemIdSecondArg);
+
+		ReplaceElementStore factory = new ReplaceElementStore();
+
 		ReplaceElementProperties props = GWT
 				.create(ReplaceElementProperties.class);
 		Log.debug("Props: " + props);
-		ListStore<ReplaceElement> storeReplaceElement = new ListStore<ReplaceElement>(
+
+		// Combo Leaf
+		ListStore<ReplaceElement> storeReplaceElementsLeaf = new ListStore<ReplaceElement>(
 				props.id());
-		Log.debug("Store: " + storeReplaceElement);
-		ReplaceElementStore factory = new ReplaceElementStore();
-		storeReplaceElement.addAll(factory.replaceElements);
-		
-		
+		Log.debug("Store Leaf: " + storeReplaceElementsLeaf);
+		storeReplaceElementsLeaf.addAll(factory.replaceElements);
+
 		Log.debug("Store created");
-		ComboBox<ReplaceElement> comboReplaceElement = new ComboBox<ReplaceElement>(
-				storeReplaceElement, props.label());
+		final ComboBox<ReplaceElement> comboReplaceElementsLeaf = new ComboBox<ReplaceElement>(
+				storeReplaceElementsLeaf, props.label());
 
 		Log.debug("Combo created");
 
-		comboReplaceElement
+		comboReplaceElementsLeaf
 				.addSelectionHandler(new SelectionHandler<ReplaceElement>() {
 
 					public void onSelection(SelectionEvent<ReplaceElement> event) {
@@ -106,14 +165,43 @@ public class ReplaceWidget extends SimpleContainer {
 							ReplaceElement re = event.getSelectedItem();
 							Log.debug("Condition selected:" + re.toString());
 							switch (re.getReplaceType()) {
+							case Value:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_INSERT_A_STRING);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case ColumnValue:
+								firstArg.setVisible(false);
+								firstArg.setEmptyText("");
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
 							case Concat:
 								break;
-							case Equals:
+							case SubstringByRegex:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_REGEXP);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case SubstringByIndex:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_INDEX);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_INDEX);
+								break;
+							case SubstringByCharSeq:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_STRING);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_STRING);
 								break;
 							default:
 								break;
 							}
 
+							vert.forceLayout();
 							thisCont.forceLayout();
 
 						}
@@ -121,35 +209,470 @@ public class ReplaceWidget extends SimpleContainer {
 
 				});
 
-		comboReplaceElement.setEmptyText("Select...");
-		comboReplaceElement.setWidth("230px");
-		comboReplaceElement.setEditable(false);
-		comboReplaceElement.setTriggerAction(TriggerAction.ALL);
-		
-		comboReplaceElement.setValue(storeReplaceElement.get(0), true);
+		comboReplaceElementsLeaf.setEmptyText("Select...");
+		comboReplaceElementsLeaf.setItemId(itemIdComboLeaf);
+		comboReplaceElementsLeaf.setWidth(COMBO_WIDTH);
+		comboReplaceElementsLeaf.setEditable(false);
+
+		comboReplaceElementsLeaf.setTriggerAction(TriggerAction.ALL);
+
+		// ComboConcat
+		ListStore<ReplaceElement> storeReplaceElementsConcat = new ListStore<ReplaceElement>(
+				props.id());
+		Log.debug("Store Concat: " + storeReplaceElementsConcat);
+		storeReplaceElementsConcat.addAll(factory.replaceElementsConcat);
+
+		Log.debug("Store created");
+		final ComboBox<ReplaceElement> comboReplaceElementsConcat = new ComboBox<ReplaceElement>(
+				storeReplaceElementsConcat, props.label());
+
+		Log.debug("Combo created");
+
+		comboReplaceElementsConcat
+				.addSelectionHandler(new SelectionHandler<ReplaceElement>() {
+
+					public void onSelection(SelectionEvent<ReplaceElement> event) {
+						if (event.getSelectedItem() != null) {
+							@SuppressWarnings("unchecked")
+							ComboBox<ReplaceElement> source = (ComboBox<ReplaceElement>) event
+									.getSource();
+							ReplaceElement re = event.getSelectedItem();
+							Log.debug("Condition selected:" + re.toString());
+							switch (re.getReplaceType()) {
+							case Value:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setEmptyText(EMPTY_TEXT_INSERT_A_STRING);
+								firstArg.setVisible(true);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								removeConcat(source);
+								break;
+							case ColumnValue:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(false);
+								firstArg.setEmptyText("");
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case Concat:
+								if (!existConcat(source)) {
+									comboReplaceElementsLeaf.setVisible(true);
+									firstArg.setVisible(false);
+									firstArg.setEmptyText("");
+									secondArg.setVisible(false);
+									secondArg.setEmptyText("");
+									addConcat();
+								}
+								break;
+							case SubstringByRegex:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_REGEXP);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								removeConcat(source);
+								break;
+							case SubstringByIndex:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_INDEX);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_INDEX);
+								removeConcat(source);
+								break;
+							case SubstringByCharSeq:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_STRING);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_STRING);
+								removeConcat(source);
+								break;
+							default:
+								break;
+							}
+							vert.forceLayout();
+							thisCont.forceLayout();
+
+						}
+					}
+
+				});
+
+		comboReplaceElementsConcat.setEmptyText("Select...");
+		comboReplaceElementsConcat.setItemId(itemIdComboConcat);
+		comboReplaceElementsConcat.setWidth(COMBO_WIDTH);
+		comboReplaceElementsConcat.setEditable(false);
+		comboReplaceElementsConcat.setTriggerAction(TriggerAction.ALL);
+
+		comboReplaceElementsConcat.setValue(storeReplaceElementsConcat.get(0),
+				true);
+
 		//
-		replaceValue = new TextField();
-		replaceValue.setToolTip("Replace Value");
-		replaceValue.setValue("");
-		
-		horiz.add(comboReplaceElement, new BoxLayoutData(new Margins(1)));
-		horiz.add(replaceValue, new BoxLayoutData(new Margins(1)));
-		
+		horiz.add(comboReplaceElementsConcat, new BoxLayoutData(new Margins(0)));
+		horiz.add(comboReplaceElementsLeaf, new BoxLayoutData(new Margins(0)));
+		horiz.add(firstArg, new BoxLayoutData(new Margins(0)));
+		horiz.add(secondArg, new BoxLayoutData(new Margins(0)));
+		horiz.setItemId(itemIdHoriz);
 		vert.add(horiz, new VerticalLayoutData(-1, -1, new Margins(1)));
 
-		add(vert);
+		add(vert, new MarginData(0));
 
-		
+		firstArg.setVisible(true);
+		secondArg.setVisible(false);
+		comboReplaceElementsLeaf.setVisible(false);
+		comboReplaceElementsConcat.setVisible(true);
+		forceLayout();
+	}
+
+	protected void addConcat() {
+		final HBoxLayoutContainer horiz = new HBoxLayoutContainer();
+
+		final TextField firstArg = new TextField();
+		firstArg.setItemId(itemIdFirstArg);
+
+		final TextField secondArg = new TextField();
+		secondArg.setItemId(itemIdSecondArg);
+
+		ReplaceElementStore factory = new ReplaceElementStore();
+
+		ReplaceElementProperties props = GWT
+				.create(ReplaceElementProperties.class);
+		Log.debug("Props: " + props);
+
+		// Combo Leaf
+		ListStore<ReplaceElement> storeReplaceElementsLeaf = new ListStore<ReplaceElement>(
+				props.id());
+		Log.debug("Store Leaf: " + storeReplaceElementsLeaf);
+		storeReplaceElementsLeaf.addAll(factory.replaceElements);
+
+		Log.debug("Store created");
+		final ComboBox<ReplaceElement> comboReplaceElementsLeaf = new ComboBox<ReplaceElement>(
+				storeReplaceElementsLeaf, props.label());
+
+		Log.debug("Combo created");
+
+		comboReplaceElementsLeaf
+				.addSelectionHandler(new SelectionHandler<ReplaceElement>() {
+
+					public void onSelection(SelectionEvent<ReplaceElement> event) {
+						if (event.getSelectedItem() != null) {
+							ReplaceElement re = event.getSelectedItem();
+							Log.debug("Condition selected:" + re.toString());
+							switch (re.getReplaceType()) {
+							case Value:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_INSERT_A_STRING);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case ColumnValue:
+								firstArg.setVisible(false);
+								firstArg.setEmptyText("");
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case Concat:
+								break;
+							case SubstringByRegex:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_REGEXP);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case SubstringByIndex:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_INDEX);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_INDEX);
+								break;
+							case SubstringByCharSeq:
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_STRING);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_STRING);
+								break;
+							default:
+								break;
+							}
+							vert.forceLayout();
+							thisCont.forceLayout();
+
+						}
+					}
+
+				});
+
+		comboReplaceElementsLeaf.setEmptyText("Select...");
+		comboReplaceElementsLeaf.setItemId(itemIdComboLeaf);
+		comboReplaceElementsLeaf.setWidth(COMBO_WIDTH);
+		comboReplaceElementsLeaf.setEditable(false);
+
+		comboReplaceElementsLeaf.setTriggerAction(TriggerAction.ALL);
+
+		// ComboConcat
+		ListStore<ReplaceElement> storeReplaceElementsConcat = new ListStore<ReplaceElement>(
+				props.id());
+		Log.debug("Store Concat: " + storeReplaceElementsConcat);
+		storeReplaceElementsConcat.addAll(factory.replaceElementsConcat);
+
+		Log.debug("Store created");
+		final ComboBox<ReplaceElement> comboReplaceElementsConcat = new ComboBox<ReplaceElement>(
+				storeReplaceElementsConcat, props.label());
+
+		Log.debug("Combo created");
+
+		comboReplaceElementsConcat
+				.addSelectionHandler(new SelectionHandler<ReplaceElement>() {
+
+					public void onSelection(SelectionEvent<ReplaceElement> event) {
+
+						if (event.getSelectedItem() != null) {
+							@SuppressWarnings("unchecked")
+							ComboBox<ReplaceElement> source = (ComboBox<ReplaceElement>) event
+									.getSource();
+							ReplaceElement re = event.getSelectedItem();
+							Log.debug("Condition selected:" + re.toString());
+							switch (re.getReplaceType()) {
+							case Value:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setEmptyText(EMPTY_TEXT_INSERT_A_STRING);
+								firstArg.setVisible(true);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								removeConcat(source);
+								break;
+							case ColumnValue:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(false);
+								firstArg.setEmptyText("");
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								break;
+							case Concat:
+								if (!existConcat(source)) {
+									comboReplaceElementsLeaf.setVisible(true);
+									firstArg.setVisible(false);
+									firstArg.setEmptyText("");
+									secondArg.setVisible(false);
+									secondArg.setEmptyText("");
+									addConcat();
+								}
+								break;
+							case SubstringByRegex:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_REGEXP);
+								secondArg.setVisible(false);
+								secondArg.setEmptyText("");
+								removeConcat(source);
+								break;
+							case SubstringByIndex:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_INDEX);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_INDEX);
+								removeConcat(source);
+								break;
+							case SubstringByCharSeq:
+								comboReplaceElementsLeaf.setVisible(false);
+								firstArg.setVisible(true);
+								firstArg.setEmptyText(EMPTY_TEXT_FROM_STRING);
+								secondArg.setVisible(true);
+								secondArg.setEmptyText(EMPTY_TEXT_TO_STRING);
+								removeConcat(source);
+								break;
+							default:
+								break;
+							}
+							vert.forceLayout();
+							thisCont.forceLayout();
+
+						}
+
+					}
+
+				});
+
+		comboReplaceElementsConcat.setEmptyText("Select...");
+		comboReplaceElementsConcat.setItemId(itemIdComboConcat);
+		comboReplaceElementsConcat.setWidth(COMBO_WIDTH);
+		comboReplaceElementsConcat.setEditable(false);
+		comboReplaceElementsConcat.setTriggerAction(TriggerAction.ALL);
+
+		comboReplaceElementsConcat.setValue(storeReplaceElementsConcat.get(0),
+				true);
+
+		//
+		horiz.add(comboReplaceElementsConcat, new BoxLayoutData(new Margins(0)));
+		horiz.add(comboReplaceElementsLeaf, new BoxLayoutData(new Margins(0)));
+		horiz.add(firstArg, new BoxLayoutData(new Margins(0)));
+		horiz.add(secondArg, new BoxLayoutData(new Margins(0)));
+		horiz.setItemId(itemIdHoriz);
+		vert.add(horiz, new VerticalLayoutData(-1, -1, new Margins(1)));
+
+		firstArg.setVisible(true);
+		secondArg.setVisible(false);
+		comboReplaceElementsLeaf.setVisible(false);
+		comboReplaceElementsConcat.setVisible(true);
+		forceLayout();
+	}
+
+	private void removeConcat(ComboBox<ReplaceElement> source) {
+		HBoxLayoutContainer horiz = (HBoxLayoutContainer) source.getParent();
+		int index = vert.getWidgetIndex(horiz);
+		Log.debug("No concat for index: " + index);
+		index++;
+		for (int i = index; i < vert.getWidgetCount();) {
+			Log.debug("Remove horiz index: " + i);
+			vert.remove(i);
+		}
+	}
+
+	private boolean existConcat(ComboBox<ReplaceElement> source) {
+		boolean exist = false;
+		HBoxLayoutContainer horiz = (HBoxLayoutContainer) source.getParent();
+		int index = vert.getWidgetIndex(horiz);
+		Log.debug("No concat for index: " + index);
+		index++;
+		if (index < vert.getWidgetCount()) {
+			exist = true;
+		} else {
+			exist = false;
+		}
+		return exist;
 	}
 
 	public C_Expression getExpression() {
-		C_Expression exp = null;
+		ExpressionContainer expressionContainer = null;
+		readableExpression = new String();
+		C_Expression expression = null;
 
-		Log.debug("C_Expression:" + exp);
-		return exp;
+		if (vert.getWidgetCount() > 0) {
+			int index = 0;
+			expressionContainer = calcCExpression(index);
+			if (expressionContainer != null) {
+				readableExpression = expressionContainer
+						.getReadableExpression();
+				expression = expressionContainer.getExpression();
+			} else {
+				
+			}
+		}
+
+		Log.debug("ReadableExpression: " + readableExpression);
+		Log.debug("C_Expression:" + expression);
+		return expression;
 	}
 
 	public String getReadableExpression() {
 		return readableExpression;
 	}
+
+	protected ExpressionContainer calcCExpression(int index) {
+		ExpressionContainer expressionContainer = null;
+		ExpressionContainer expContainerConcat = null;
+		C_Expression exp = null;
+		C_Expression expLeaf = null;
+		String readableExp = "";
+		String readableExpLeaf = "";
+		TextField firstArg;
+		TextField secondArg;
+		HBoxLayoutContainer horiz;
+		ReplaceTypeMap mapReplace = new ReplaceTypeMap();
+
+		horiz = (HBoxLayoutContainer) vert.getWidget(index);
+		@SuppressWarnings("unchecked")
+		ComboBox<ReplaceElement> comboConcat = (ComboBox<ReplaceElement>) horiz
+				.getItemByItemId(itemIdComboConcat);
+		Log.debug("combo: " + comboConcat.getCurrentValue().toString());
+		@SuppressWarnings("unchecked")
+		ComboBox<ReplaceElement> comboLeaf = (ComboBox<ReplaceElement>) horiz
+				.getItemByItemId(itemIdComboLeaf);
+		Log.debug("combo: " + comboConcat.getCurrentValue().toString());
+
+		firstArg = (TextField) horiz.getItemByItemId(itemIdFirstArg);
+		secondArg = (TextField) horiz.getItemByItemId(itemIdSecondArg);
+		Log.debug("firstArg: " + firstArg.getCurrentValue() + " secondArg: "
+				+ secondArg.getCurrentValue());
+
+		ReplaceType comboConcatReplaceType = null;
+		ReplaceType comboLeafReplaceType = null;
+
+		if (comboConcat.getCurrentValue() == null) {
+			if (index == vert.getWidgetCount() - 1) {
+				exp = mapReplace.map(column, ReplaceType.Null,
+						firstArg == null ? null : firstArg.getCurrentValue(),
+						secondArg == null ? null : secondArg.getCurrentValue());
+				readableExp = mapReplace.getReadableExpression();
+				expressionContainer = new ExpressionContainer(exp, readableExp);
+			} else {
+				return null;
+			}
+		} else {
+			comboConcatReplaceType = comboConcat.getCurrentValue()
+					.getReplaceType();
+			if (comboConcatReplaceType.compareTo(ReplaceType.Concat) == 0) {
+
+				if (comboLeaf.getCurrentValue() == null) {
+					expLeaf = mapReplace.map(
+							column,
+							ReplaceType.Null,
+							firstArg == null ? null : firstArg
+									.getCurrentValue(),
+							secondArg == null ? null : secondArg
+									.getCurrentValue());
+					readableExpLeaf = mapReplace.getReadableExpression();
+
+				} else {
+					comboLeafReplaceType = comboLeaf.getCurrentValue()
+							.getReplaceType();
+					expLeaf = mapReplace.map(
+							column,
+							comboLeafReplaceType,
+							firstArg == null ? null : firstArg
+									.getCurrentValue(),
+							secondArg == null ? null : secondArg
+									.getCurrentValue());
+					readableExpLeaf = mapReplace.getReadableExpression();
+				}
+
+				index++;
+				if (index < vert.getWidgetCount()) {
+					expContainerConcat = calcCExpression(index);
+					if (expContainerConcat == null) {
+						return null;
+					} else {
+						exp = mapReplace.map(
+								column,
+								comboConcatReplaceType,
+								firstArg == null ? null : firstArg
+										.getCurrentValue(),
+								secondArg == null ? null : secondArg
+										.getCurrentValue(), expLeaf,
+								expContainerConcat.getExpression(),
+								readableExpLeaf, expContainerConcat
+										.getReadableExpression());
+						readableExp = mapReplace.getReadableExpression();
+						expressionContainer = new ExpressionContainer(exp,
+								readableExp);
+					}
+				} else {
+					return null;
+				}
+
+			} else {
+				exp = mapReplace.map(column, comboConcatReplaceType,
+						firstArg == null ? null : firstArg.getCurrentValue(),
+						secondArg == null ? null : secondArg.getCurrentValue());
+				readableExp = mapReplace.getReadableExpression();
+				expressionContainer = new ExpressionContainer(exp,
+						readableExp);
+
+			}
+		}
+		return expressionContainer;
+
+	}
 }

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/properties/ReplaceElement.java

@@ -2,6 +2,8 @@ package org.gcube.portlets.user.td.expressionwidget.client.properties;
 
 import java.io.Serializable;
 
+import org.gcube.portlets.user.td.expressionwidget.shared.replace.ReplaceType;
+
 /**
  * 
  * @author giancarlo email: <a

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/properties/ReplaceElementStore.java

@@ -2,6 +2,8 @@ package org.gcube.portlets.user.td.expressionwidget.client.properties;
 
 import java.util.ArrayList;
 
+import org.gcube.portlets.user.td.expressionwidget.shared.replace.ReplaceType;
+
 /**
  * 
  * @author "Giancarlo Panichi" <a
@@ -10,14 +12,33 @@ import java.util.ArrayList;
  */
 public class ReplaceElementStore {
 
+	public ArrayList<ReplaceElement> replaceElementsConcat = new ArrayList<ReplaceElement>() {
+
+		private static final long serialVersionUID = 1690916203781730778L;
+
+		{
+			add(new ReplaceElement(1, ReplaceType.Value));
+			add(new ReplaceElement(2, ReplaceType.ColumnValue));
+			add(new ReplaceElement(3, ReplaceType.SubstringByRegex));
+			add(new ReplaceElement(4, ReplaceType.SubstringByIndex));
+			add(new ReplaceElement(5, ReplaceType.SubstringByCharSeq));
+			add(new ReplaceElement(6, ReplaceType.Concat));
+		}
+	};
+	
 	public ArrayList<ReplaceElement> replaceElements = new ArrayList<ReplaceElement>() {
 
 		private static final long serialVersionUID = 1690916203781730778L;
 
 		{
-			add(new ReplaceElement(1, ReplaceType.Equals));
-			add(new ReplaceElement(2, ReplaceType.Concat));
+			add(new ReplaceElement(1, ReplaceType.Value));
+			add(new ReplaceElement(2, ReplaceType.ColumnValue));
+			add(new ReplaceElement(3, ReplaceType.SubstringByRegex));
+			add(new ReplaceElement(4, ReplaceType.SubstringByIndex));
+			add(new ReplaceElement(5, ReplaceType.SubstringByCharSeq));
+			
 		}
 	};
 
+	
 }

src/main/java/org/gcube/portlets/user/td/expressionwidget/client/properties/ReplaceType.java

@@ -1,21 +0,0 @@
-package org.gcube.portlets.user.td.expressionwidget.client.properties;
-
-public enum ReplaceType {
-	Equals("Equals"),
-	Concat("Concat"); 
-
-	/**
-	 * @param text
-	 */
-	private ReplaceType(final String id) {
-		this.id = id;
-	}
-
-	private final String id;
-	
-	@Override
-	public String toString() {
-		return id;
-	}
-
-}

src/main/java/org/gcube/portlets/user/td/expressionwidget/server/C_ExpressionParser.java

@@ -91,7 +91,9 @@ public class C_ExpressionParser {
 	protected SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
 
 	public Expression parse(C_Expression exp) {
+		logger.debug("Parse: "+exp);
 		Expression ex = null;
+		
 		switch (exp.getId()) {
 		case "ColumnReferencePlaceholder":
 			ex = getColumnReferencePlaceholder(exp);

src/main/java/org/gcube/portlets/user/td/expressionwidget/server/ExpressionServiceImpl.java

@@ -39,8 +39,6 @@ public class ExpressionServiceImpl extends RemoteServiceServlet implements
 	protected static SimpleDateFormat sdf = new SimpleDateFormat(
 			"yyyy-MM-dd HH:mm");
 
-	
-
 	/**
 	 * 
 	 * {@inheritDoc}
@@ -52,66 +50,81 @@ public class ExpressionServiceImpl extends RemoteServiceServlet implements
 		try {
 			logger.debug("ExpressionService submitColumnFilter");
 			HttpSession session = this.getThreadLocalRequest().getSession();
-			logger.debug("Session: "+session);
-			
-			if(filterColumnSession==null){
+			logger.debug("Session: " + session);
+
+			if (filterColumnSession == null) {
 				logger.error("FilterColumnSession is null");
 				new ExpressionServiceException("FilterColumnSession is null");
 			}
-			ExpressionSession.setColumnFilterSession(session, filterColumnSession);
-			
-			C_ExpressionParser parser=new C_ExpressionParser();
-			Expression expression=parser.parse(filterColumnSession.getCexpression());
-			logger.debug("Service Expression:"+expression);
-			
-			
+			ExpressionSession.setColumnFilterSession(session,
+					filterColumnSession);
+
+			C_ExpressionParser parser = new C_ExpressionParser();
+			Expression expression = parser.parse(filterColumnSession
+					.getCexpression());
+			logger.debug("Service Expression:" + expression);
+
 			TDGWTServiceImpl gwtService = new TDGWTServiceImpl();
-			
-			String taskId= gwtService.startFilterColumn(filterColumnSession, expression, session);
-			
+
+			String taskId = gwtService.startFilterColumn(filterColumnSession,
+					expression, session);
+
 			return taskId;
-		
-		} catch (TDGWTSessionExpiredException e){
+
+		} catch (TDGWTSessionExpiredException e) {
 			throw e;
 		} catch (Throwable e) {
 			e.printStackTrace();
-			throw new TDGWTServiceException(
-					"Error in Client Library Request: "
-							+ e.getLocalizedMessage());
+			throw new TDGWTServiceException("Error in Client Library Request: "
+					+ e.getLocalizedMessage());
 		}
 	}
-	
+
 	/**
 	 * 
 	 * {@inheritDoc}
 	 */
 	@Override
-	public String startReplaceColumnByExpression(ReplaceColumnByExpressionSession replaceColumnByExpressionSession)
+	public String startReplaceColumnByExpression(
+			ReplaceColumnByExpressionSession replaceColumnByExpressionSession)
 			throws TDGWTServiceException {
 
 		try {
 			logger.debug("ExpressionService submitReplaceColumnByExpression");
 			HttpSession session = this.getThreadLocalRequest().getSession();
-			logger.debug("Session: "+session);
-			
-			if(replaceColumnByExpressionSession==null){
+			logger.debug("Session: " + session);
+
+			if (replaceColumnByExpressionSession == null) {
 				logger.error("ReplaceColumnByExpressionSession is null");
-				new ExpressionServiceException("ReplaceColumnByExpressionSession is null");
+				new ExpressionServiceException(
+						"ReplaceColumnByExpressionSession is null");
 			}
-			ExpressionSession.setReplaceColumnByExpressionSession(session, replaceColumnByExpressionSession);
-			
-			C_ExpressionParser parser=new C_ExpressionParser();
-			Expression expression=parser.parse(replaceColumnByExpressionSession.getcConditionExpression());
-			logger.debug("Service Expression:"+expression);
-			
-			
+			ExpressionSession.setReplaceColumnByExpressionSession(session,
+					replaceColumnByExpressionSession);
+
+			C_ExpressionParser parser = new C_ExpressionParser();
+			Expression conditionExpression = parser
+					.parse(replaceColumnByExpressionSession
+							.getcConditionExpression());
+			logger.debug("Service Condition Expression:" + conditionExpression);
+
+			Expression replaceExpression = null;
+			if (!replaceColumnByExpressionSession.isReplaceByValue()) {
+				replaceExpression = parser
+						.parse(replaceColumnByExpressionSession
+								.getcReplaceExpression());
+				logger.debug("Service Replace Expression:"
+						+ conditionExpression);
+			}
+
 			TDGWTServiceImpl gwtService = new TDGWTServiceImpl();
-			
-			String taskId= gwtService.startReplaceColumnByExpression(replaceColumnByExpressionSession, expression, session);
-			
+
+			String taskId = gwtService.startReplaceColumnByExpression(
+					replaceColumnByExpressionSession, conditionExpression,
+					replaceExpression, session);
 			return taskId;
-		
-		} catch (TDGWTSessionExpiredException e){
+
+		} catch (TDGWTSessionExpiredException e) {
 			throw e;
 		} catch (Throwable e) {
 			e.printStackTrace();
@@ -120,11 +133,7 @@ public class ExpressionServiceImpl extends RemoteServiceServlet implements
 							+ e.getLocalizedMessage());
 		}
 	}
-	
-	
 
-	
-	
 	/**
 	 * Retrieve and set Tabular Resource Type
 	 * 

src/main/java/org/gcube/portlets/user/td/expressionwidget/shared/model/composite/text/C_SubstringByRegex.java

@@ -21,10 +21,9 @@ public class C_SubstringByRegex extends C_Expression {
 		super();
 	}
 
-	public C_SubstringByRegex(String id, C_Expression sourceString,
+	public C_SubstringByRegex(C_Expression sourceString,
 			C_Expression regex) {
 		super();
-		this.id = id;
 		this.sourceString = sourceString;
 		this.regex = regex;
 	}

src/main/java/org/gcube/portlets/user/td/expressionwidget/shared/replace/ReplaceType.java

@@ -0,0 +1,26 @@
+package org.gcube.portlets.user.td.expressionwidget.shared.replace;
+
+public enum ReplaceType {
+	Null("Null"),
+	Value("Value"),
+	ColumnValue("Column Value"),
+	SubstringByRegex("Substring by Regex"),
+	SubstringByIndex("Substring by Index"),
+	SubstringByCharSeq("Substring by Char Seq."),
+	Concat("Concat"); 
+
+	/**
+	 * @param text
+	 */
+	private ReplaceType(final String id) {
+		this.id = id;
+	}
+
+	private final String id;
+	
+	@Override
+	public String toString() {
+		return id;
+	}
+
+}

src/main/java/org/gcube/portlets/user/td/expressionwidget/shared/replace/ReplaceTypeMap.java

@@ -0,0 +1,184 @@
+package org.gcube.portlets.user.td.expressionwidget.shared.replace;
+
+import org.gcube.portlets.user.td.expressionwidget.shared.model.composite.text.C_Concat;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.composite.text.C_SubstringByIndex;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.composite.text.C_SubstringByRegex;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.composite.text.C_SubstringPosition;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.leaf.C_ColumnReferencePlaceholder;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.leaf.C_TypedColumnReference;
+import org.gcube.portlets.user.td.expressionwidget.shared.model.leaf.TD_Value;
+import org.gcube.portlets.user.td.gwtservice.shared.tr.ColumnData;
+import org.gcube.portlets.user.td.widgetcommonevent.shared.expression.C_Expression;
+import org.gcube.portlets.user.td.widgetcommonevent.shared.tr.column.ColumnDataType;
+import org.gcube.portlets.user.td.widgetcommonevent.shared.tr.column.ColumnTypeMap;
+
+import com.allen_sauer.gwt.log.client.Log;
+
+/**
+ * OperatorTypeMap creates a C_Expression usable client-side
+ * 
+ * @author "Giancarlo Panichi" <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
+ * 
+ */
+public class ReplaceTypeMap {
+	private String readableExpression;
+
+	public ReplaceTypeMap() {
+
+	}
+	
+	public C_Expression map(ColumnData column, ReplaceType replaceType,
+			String firstArg, String secondArg) {
+		return map(column, replaceType,firstArg,  secondArg, null, null, null, null);
+	}
+
+	public C_Expression map(ColumnData column, ReplaceType replaceType,
+			String firstArg, String secondArg, C_Expression firstE,
+			C_Expression secondE, String readableFirstE, String readableSecondE) {
+		Log.debug("ReplaceTypeMap Map");
+		C_Expression exp = null;
+		readableExpression = new String();
+		if (column.getTrId() == null) {
+			exp = mapPlaceHolder(column, replaceType, firstArg, secondArg,
+					firstE, secondE, readableFirstE,readableSecondE);
+		} else {
+			exp = mapTypedColumnReference(column, replaceType, firstArg,
+					secondArg, firstE, secondE,readableFirstE,readableSecondE);
+		}
+		return exp;
+	}
+
+	public C_Expression mapPlaceHolder(ColumnData column,
+			ReplaceType replaceType, String firstArg, String secondArg,
+			C_Expression firstE, C_Expression secondE,String readableFirstE, String readableSecondE) {
+		Log.debug("OperatorTypeMap Map Place Holder");
+		C_Expression exp = null;
+		Log.debug("Column Data Type Name:" + column.getDataTypeName());
+		ColumnDataType dataType = ColumnTypeMap.getColumnDataType(column
+				.getDataTypeName());
+		Log.debug("Data Type:" + dataType);
+		C_ColumnReferencePlaceholder placeHolder = new C_ColumnReferencePlaceholder(
+				dataType, column.getColumnId());
+		Log.debug("placeHolder:" + placeHolder);
+		String readablePlaceHolder = column.getColumnId();
+		TD_Value fArg, sArg;
+		C_Expression posFrom, posTo;
+
+		switch (replaceType) {
+		case Null:
+			exp = new TD_Value(ColumnDataType.Text, "");
+			readableExpression = "Null()";
+			break;
+		case Value:
+			exp = new TD_Value(dataType, firstArg);
+			readableExpression = "Value(" + firstArg + ")";
+			break;
+		case ColumnValue:
+			exp = placeHolder;
+			readableExpression = "ColumnValue(" + readablePlaceHolder + ")";
+			break;
+		case Concat:
+			exp = new C_Concat(firstE, secondE);
+			readableExpression = "Concat(" + readableFirstE
+					+ ", " + readableSecondE + ")";
+			break;
+		case SubstringByRegex:
+			fArg = new TD_Value(ColumnDataType.Text, firstArg);
+			exp = new C_SubstringByRegex(placeHolder, fArg);
+			readableExpression = "SubStringByRegex(" + readablePlaceHolder
+					+ ", " + firstArg + ")";
+			break;
+		case SubstringByIndex:
+			fArg = new TD_Value(ColumnDataType.Integer, firstArg);
+			sArg = new TD_Value(ColumnDataType.Integer, secondArg);
+			exp = new C_SubstringByIndex(placeHolder, fArg, sArg);
+			readableExpression = "SubstringByIndex(" + readablePlaceHolder
+					+ ", " + firstArg + ", " + secondArg + ")";
+			break;
+		case SubstringByCharSeq:
+			fArg = new TD_Value(ColumnDataType.Text, firstArg);
+			posFrom = new C_SubstringPosition(placeHolder, fArg);
+			sArg = new TD_Value(ColumnDataType.Text, secondArg);
+			posTo = new C_SubstringPosition(placeHolder, fArg);
+			exp = new C_SubstringByIndex(placeHolder, posFrom, posTo);
+			readableExpression = "SubstringByCharSeq(" + readablePlaceHolder
+					+ ", " + firstArg + ", " + secondArg + ")";
+			break;
+		default:
+			break;
+		}
+		return exp;
+	}
+
+	public C_Expression mapTypedColumnReference(ColumnData column,
+			ReplaceType replaceType, String firstArg, String secondArg,
+			C_Expression firstE, C_Expression secondE, String readableFirstE, String readableSecondE) {
+		Log.debug("OperatorTypeMap Map Typed Column Reference");
+		C_Expression exp = null;
+
+		Log.debug("Column Data Type Name:" + column.getDataTypeName());
+		ColumnDataType dataType = ColumnTypeMap.getColumnDataType(column
+				.getDataTypeName());
+		Log.debug("Data Type:" + dataType);
+		C_TypedColumnReference columnReference = new C_TypedColumnReference(
+				column.getTrId(), dataType, column.getColumnId());
+		Log.debug("Typed Column Reference:" + columnReference);
+		String readableColumnReference = column.getLabel();
+
+		TD_Value fArg, sArg;
+		C_Expression posFrom, posTo;
+
+		switch (replaceType) {
+		case Null:
+			exp = new TD_Value(ColumnDataType.Text, "");
+			readableExpression = "Null()";
+			break;
+		case Value:
+			exp = new TD_Value(dataType, firstArg);
+			readableExpression = "Value(" + firstArg + ")";
+			break;
+		case ColumnValue:
+			exp = columnReference;
+			readableExpression = "ColumnValue(" + readableColumnReference + ")";
+			break;
+		case Concat:
+			exp = new C_Concat(firstE, secondE);
+			readableExpression = "Concat(" + readableFirstE
+					+ ", " + readableSecondE + ")";
+			break;
+		case SubstringByRegex:
+			fArg = new TD_Value(ColumnDataType.Text, firstArg);
+			exp = new C_SubstringByRegex(columnReference, fArg);
+			readableExpression = "SubStringByRegex(" + readableColumnReference
+					+ ", " + firstArg + ")";
+			break;
+		case SubstringByIndex:
+			fArg = new TD_Value(ColumnDataType.Integer, firstArg);
+			sArg = new TD_Value(ColumnDataType.Integer, secondArg);
+			exp = new C_SubstringByIndex(columnReference, fArg, sArg);
+			readableExpression = "SubstringByIndex(" + readableColumnReference
+					+ ", " + firstArg + ", " + secondArg + ")";
+			break;
+		case SubstringByCharSeq:
+			fArg = new TD_Value(ColumnDataType.Text, firstArg);
+			posFrom = new C_SubstringPosition(columnReference, fArg);
+			sArg = new TD_Value(ColumnDataType.Text, secondArg);
+			posTo = new C_SubstringPosition(columnReference, fArg);
+			exp = new C_SubstringByIndex(columnReference, posFrom, posTo);
+			readableExpression = "SubstringByCharSeq("
+					+ readableColumnReference + ", " + firstArg + ", "
+					+ secondArg + ")";
+			break;
+		default:
+			break;
+		}
+
+		return exp;
+	}
+
+	public String getReadableExpression() {
+		return readableExpression;
+	}
+
+}

src/main/resources/org/gcube/portlets/user/td/expressionwidget/ExpressionWidget.gwt.xml

@@ -23,7 +23,7 @@
  
   
   <!-- Specify the app entry point class.                         -->
-  <!-- <entry-point class='org.gcube.portlets.user.td.expressionwidget.client.ExpressionWidgetEntry' />  -->
+  <!-- <entry-point class='org.gcube.portlets.user.td.expressionwidget.client.ExpressionWidgetEntry' /> -->
 
   <!-- Specify the paths for translatable code                    -->
   <source path='client' />