bundles/core/org.eclipse.apogy.core.invocator.ui/src/org/eclipse/apogy/core/invocator/ui/toolcontrols/SessionStatusToolControl.java - gerrit/apogy/apogy - Git at Google

 /*******************************************************************************
  * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     Pierre Allard,
  *     Regent L'Archeveque,
  *     Olivier L. Larouche - initial API and implementation
  *
  * SPDX-License-Identifier: EPL-1.0
  *
  *******************************************************************************/
 package org.eclipse.apogy.core.invocator.ui.toolcontrols;

 import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;

 import org.eclipse.apogy.common.emf.ApogyCommonEMFPackage;
 import org.eclipse.apogy.common.emf.transaction.ApogyCommonTransactionFacade;
 import org.eclipse.apogy.core.invocator.ApogyCoreInvocatorFacade;
 import org.eclipse.apogy.core.invocator.ApogyCoreInvocatorPackage;
 import org.eclipse.apogy.core.invocator.Context;
 import org.eclipse.apogy.core.invocator.InvocatorSession;
 import org.eclipse.apogy.core.invocator.ui.ApogyCoreInvocatorUIFacade;
 import org.eclipse.core.databinding.DataBindingContext;
 import org.eclipse.core.databinding.UpdateValueStrategy;
 import org.eclipse.core.databinding.conversion.Converter;
 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.emf.databinding.EMFProperties;
 import org.eclipse.emf.databinding.FeaturePath;
 import org.eclipse.emf.databinding.edit.EMFEditProperties;
 import org.eclipse.jface.databinding.swt.WidgetProperties;
 import org.eclipse.jface.databinding.viewers.ViewerSupport;
 import org.eclipse.jface.viewers.ComboViewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;

 public class SessionStatusToolControl {

 	private DataBindingContext m_bindingContext;
 	private ComboViewer comboViewerContext;
 	private Button btnStart;
 	private Button btnStop;
 	private Text txtInstanceStatus;

 	@PostConstruct
 	public void createControls(Composite parent) {
 		final Composite composite = new Composite(parent, SWT.None);
 		composite.setLayout(new GridLayout(6, false));
 		composite.addDisposeListener(new DisposeListener() {
 			@Override
 			public void widgetDisposed(DisposeEvent e) {
 				if (SessionStatusToolControl.this.m_bindingContext != null) {
 					SessionStatusToolControl.this.m_bindingContext.dispose();
 				}
 			}
 		});

 		Label label = new Label(composite, SWT.None);
 		label.setText("Context :");

 		this.comboViewerContext = new ComboViewer(composite, SWT.NONE);
 		GridData gd_comboContext = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);
 		gd_comboContext.widthHint = 250;
 		gd_comboContext.minimumWidth = 250;
 		this.comboViewerContext.getCombo().setLayoutData(gd_comboContext);

 		this.btnStart = new Button(composite, SWT.NONE);
 		this.btnStart.setLayoutData(new GridData(SWT.LEFT, SWT.FILL, false, true, 1, 1));
 		this.btnStart.setText("Start");

 		/*
 		 * Create the listener that initiates the variables of the environment when the
 		 * button is selected. This is to reset the instances.
 		 */
 		this.btnStart.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null
 						&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment() != null
 						&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 								.getActiveContext() != null) {
 					ApogyCoreInvocatorUIFacade.INSTANCE.initSession();
 				}
 			}
 		});

 		this.btnStop = new Button(composite, SWT.NONE);
 		this.btnStop.setLayoutData(new GridData(SWT.LEFT, SWT.FILL, false, true, 1, 1));
 		this.btnStop.setText("Stop");

 		/*
 		 * Create the listener that disposes the variables of the environment when the
 		 * button is selected. This is to clear the instances
 		 */
 		this.btnStop.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null
 						&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment() != null
 						&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 								.getActiveContext() != null) {
 					ApogyCoreInvocatorUIFacade.INSTANCE.disposeSession();
 				}
 			}
 		});

 		this.txtInstanceStatus = new Text(composite, SWT.BORDER | SWT.READ_ONLY);
 		this.txtInstanceStatus.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_TRANSPARENT));
 		GridData gd_txtInstanceStatus = new GridData(SWT.LEFT, SWT.FILL, false, false, 1, 1);
 		gd_txtInstanceStatus.widthHint = 16;
 		this.txtInstanceStatus.setLayoutData(gd_txtInstanceStatus);
 		this.txtInstanceStatus.setEditable(false);

 		this.m_bindingContext = customInitDataBindings();
 	}

 	/**
 	 * Disposes the actual parentComposite.
 	 */
 	@PreDestroy
 	public void dispose() {
 		this.m_bindingContext.dispose();
 	}

 	/**
 	 * Creates and returns the data bindings associated with the active session.
 	 *
 	 * @return Reference to the bindings.
 	 */
 	@SuppressWarnings("unchecked")
 	protected DataBindingContext customInitDataBindings() {

 		this.m_bindingContext = new DataBindingContext();
 		IObservableValue<?> invocatorFacadeActiveInvocatorSessionObserveValue = EMFProperties
 				.value(ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION)
 				.observe(ApogyCoreInvocatorFacade.INSTANCE);

 		/**
 		 * Data binding for the different elements of the UI to be enabled/disabled if
 		 * there is an active session or not
 		 */
 		IObservableValue<?> observeEnabledResetInstancesObserveWidget = WidgetProperties.enabled()
 				.observe(this.btnStart);
 		this.m_bindingContext.bindValue(observeEnabledResetInstancesObserveWidget,
 				invocatorFacadeActiveInvocatorSessionObserveValue, null,
 				new InvocatorInstanceToBooleanUpdateValueStrategy());

 		IObservableValue<?> observeEnabledClearInstancesObserveWidget = WidgetProperties.enabled()
 				.observe(this.btnStop);
 		this.m_bindingContext.bindValue(observeEnabledClearInstancesObserveWidget,
 				invocatorFacadeActiveInvocatorSessionObserveValue, null,
 				new InvocatorInstanceToBooleanUpdateValueStrategy());

 		IObservableValue<?> observeEnabledComboContextObserveWidget = WidgetProperties.enabled()
 				.observe(this.comboViewerContext.getCombo());
 		this.m_bindingContext.bindValue(observeEnabledComboContextObserveWidget,
 				invocatorFacadeActiveInvocatorSessionObserveValue, null,
 				new InvocatorInstanceToBooleanUpdateValueStrategy());
 		IObservableValue<?> observeEnabledTxtInstanceStatusObserveWidget = WidgetProperties.enabled()
 				.observe(this.txtInstanceStatus);
 		this.m_bindingContext.bindValue(observeEnabledTxtInstanceStatusObserveWidget,
 				invocatorFacadeActiveInvocatorSessionObserveValue, null,
 				new InvocatorInstanceToBooleanUpdateValueStrategy());

 		/** Data binding to get the name of the contexts for the combo box */
 		IObservableList<?> invocatorFacadeEnvironmentContextsListContextsObserveValue = EMFProperties
 				.list(FeaturePath.fromList(
 						ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
 						ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
 						ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__CONTEXTS_LIST,
 						ApogyCoreInvocatorPackage.Literals.CONTEXTS_LIST__CONTEXTS))
 				.observe(ApogyCoreInvocatorFacade.INSTANCE);
 		ViewerSupport.bind(this.comboViewerContext, invocatorFacadeEnvironmentContextsListContextsObserveValue,
 				EMFProperties.value(ApogyCommonEMFPackage.Literals.NAMED__NAME));
 		/**
 		 * Data binding to set the text value of the combo box to the active context
 		 */
 		IObservableValue<?> observeComboContextSingleSelectionIndexObserveWidget = WidgetProperties
 				.singleSelectionIndex().observe(this.comboViewerContext.getCombo());
 		IObservableValue<?> invocatorFacadeEnvironmentActiveContextObserveValue = EMFEditProperties
 				.value(ApogyCommonTransactionFacade.INSTANCE.getDefaultEditingDomain(), FeaturePath.fromList(
 						ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
 						ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
 						ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__ACTIVE_CONTEXT))
 				.observe(ApogyCoreInvocatorFacade.INSTANCE);

 		this.m_bindingContext.bindValue(observeComboContextSingleSelectionIndexObserveWidget,
 				invocatorFacadeEnvironmentActiveContextObserveValue,
 				new UpdateValueStrategy().setConverter(new Converter(Integer.class, Context.class) {

 					@Override
 					public Object convert(Object fromObject) {
 						if (fromObject != null && (Integer) fromObject != -1
 								&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
 							if (!ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 									.getContextsList().getContexts().get((Integer) fromObject).equals(null)) {

 								return ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 										.getContextsList().getContexts().get((Integer) fromObject);
 							}
 						}
 						return null;
 					}

 				}),

 				new UpdateValueStrategy().setConverter(new Converter(Context.class, Integer.class) {
 					@Override
 					public Object convert(Object arg0) {
 						if (arg0 != null) {
 							for (int i = 0; i < SessionStatusToolControl.this.comboViewerContext.getCombo()
 									.getItemCount(); i++) {
 								if (((Context) arg0).getName() != null && ((Context) arg0).getName().equals(
 										SessionStatusToolControl.this.comboViewerContext.getCombo().getItem(i))) {
 									return i;
 								}
 							}
 						}
 						return -1;
 					}
 				}));

 		/*
 		 * Bind Status Indicator.
 		 */
 		IObservableValue<?> observeBackgroundInstanceStatusObserveWidget = WidgetProperties.background()
 				.observe(this.txtInstanceStatus);
 		IObservableValue<?> invocatorFacadeActiveContextCreationDateValue = EMFProperties
 				.value(FeaturePath.fromList(
 						ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
 						ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
 						ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__ACTIVE_CONTEXT,
 						ApogyCoreInvocatorPackage.Literals.CONTEXT__VARIABLES_INSTANTIATED))
 				.observe(ApogyCoreInvocatorFacade.INSTANCE);
 		this.m_bindingContext.bindValue(observeBackgroundInstanceStatusObserveWidget,
 				invocatorFacadeActiveContextCreationDateValue,
 				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER),
 				new UpdateValueStrategy().setConverter(new Converter(Context.class, Color.class) {
 					@Override
 					public Object convert(Object fromObject) {
 						int color = SWT.COLOR_TRANSPARENT;
 						if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
 							if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
 									.getEnvironment() != null) {
 								if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 										.getActiveContext() != null) {
 									if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 											.getActiveContext().isVariablesInstantiated()) {
 										color = SWT.COLOR_GREEN;
 									}
 								}
 							}
 						}
 						return Display.getCurrent().getSystemColor(color);
 					}
 				}));

 		/*
 		 * Bind Start Enabled.
 		 */
 		IObservableValue<?> observeEnabledStartButton = WidgetProperties.enabled().observe(this.btnStart);
 		this.m_bindingContext.bindValue(observeEnabledStartButton, invocatorFacadeActiveContextCreationDateValue,
 				new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER),
 				new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
 					@Override
 					public Object convert(Object fromObject) {
 						boolean result = true;

 						if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() == null) {
 							result = false;
 						} else {
 							if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
 									.getEnvironment() != null) {
 								if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 										.getActiveContext() != null) {
 									if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 											.getActiveContext().isVariablesInstantiated()) {
 										result = false;
 									}
 								}
 							}
 						}
 						return result;
 					}
 				}));

 		/*
 		 * Bind Stop Enabled.
 		 */
 		IObservableValue<?> observeEnabledStopButton = WidgetProperties.enabled().observe(this.btnStop);
 		this.m_bindingContext.bindValue(observeEnabledStopButton, invocatorFacadeActiveContextCreationDateValue, null,
 				new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
 					@Override
 					public Object convert(Object fromObject) {
 						boolean result = false;
 						if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
 							if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
 									.getEnvironment() != null) {
 								if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 										.getActiveContext() != null) {
 									if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 											.getActiveContext().isVariablesInstantiated()) {
 										result = true;
 									}
 								}
 							}
 						}
 						return result;
 					}
 				}));

 		/*
 		 * Bind Combo Box Enabled.
 		 */
 		IObservableValue<?> observeEnabledComboWidget = WidgetProperties.enabled()
 				.observe(this.comboViewerContext.getCombo());
 		this.m_bindingContext.bindValue(observeEnabledComboWidget, invocatorFacadeActiveContextCreationDateValue, null,
 				new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
 					@Override
 					public Object convert(Object fromObject) {
 						boolean result = true;

 						if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() == null) {
 							result = false;
 						} else {
 							if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
 									.getEnvironment() != null) {
 								if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 										.getActiveContext() != null) {
 									if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
 											.getActiveContext().isVariablesInstantiated()) {
 										result = false;
 									}
 								}
 							}
 						}
 						return result;
 					}
 				}));

 		return this.m_bindingContext;
 	}

 	/**
 	 * This class is used to convert a InvocatorSession to a boolean if there is an
 	 * InvocatorSession instance active
 	 */
 	private class InvocatorInstanceToBooleanUpdateValueStrategy extends UpdateValueStrategy {
 		public InvocatorInstanceToBooleanUpdateValueStrategy() {
 			setConverter(new Converter(InvocatorSession.class, Boolean.class) {
 				@Override
 				/**
 				 * @return true if there is an Invocator Session, false otherwise
 				 */
 				public Object convert(Object fromObject) {
 					return fromObject != null;
 				}
 			});
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Pierre Allard,
	* Regent L'Archeveque,
	* Olivier L. Larouche - initial API and implementation
	*
	* SPDX-License-Identifier: EPL-1.0
	*
	*******************************************************************************/
	package org.eclipse.apogy.core.invocator.ui.toolcontrols;

	import javax.annotation.PostConstruct;
	import javax.annotation.PreDestroy;

	import org.eclipse.apogy.common.emf.ApogyCommonEMFPackage;
	import org.eclipse.apogy.common.emf.transaction.ApogyCommonTransactionFacade;
	import org.eclipse.apogy.core.invocator.ApogyCoreInvocatorFacade;
	import org.eclipse.apogy.core.invocator.ApogyCoreInvocatorPackage;
	import org.eclipse.apogy.core.invocator.Context;
	import org.eclipse.apogy.core.invocator.InvocatorSession;
	import org.eclipse.apogy.core.invocator.ui.ApogyCoreInvocatorUIFacade;
	import org.eclipse.core.databinding.DataBindingContext;
	import org.eclipse.core.databinding.UpdateValueStrategy;
	import org.eclipse.core.databinding.conversion.Converter;
	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	import org.eclipse.emf.databinding.EMFProperties;
	import org.eclipse.emf.databinding.FeaturePath;
	import org.eclipse.emf.databinding.edit.EMFEditProperties;
	import org.eclipse.jface.databinding.swt.WidgetProperties;
	import org.eclipse.jface.databinding.viewers.ViewerSupport;
	import org.eclipse.jface.viewers.ComboViewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.DisposeListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;

	public class SessionStatusToolControl {

	private DataBindingContext m_bindingContext;
	private ComboViewer comboViewerContext;
	private Button btnStart;
	private Button btnStop;
	private Text txtInstanceStatus;

	@PostConstruct
	public void createControls(Composite parent) {
	final Composite composite = new Composite(parent, SWT.None);
	composite.setLayout(new GridLayout(6, false));
	composite.addDisposeListener(new DisposeListener() {
	@Override
	public void widgetDisposed(DisposeEvent e) {
	if (SessionStatusToolControl.this.m_bindingContext != null) {
	SessionStatusToolControl.this.m_bindingContext.dispose();
	}
	}
	});

	Label label = new Label(composite, SWT.None);
	label.setText("Context :");

	this.comboViewerContext = new ComboViewer(composite, SWT.NONE);
	GridData gd_comboContext = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);
	gd_comboContext.widthHint = 250;
	gd_comboContext.minimumWidth = 250;
	this.comboViewerContext.getCombo().setLayoutData(gd_comboContext);

	this.btnStart = new Button(composite, SWT.NONE);
	this.btnStart.setLayoutData(new GridData(SWT.LEFT, SWT.FILL, false, true, 1, 1));
	this.btnStart.setText("Start");

	/*
	* Create the listener that initiates the variables of the environment when the
	* button is selected. This is to reset the instances.
	*/
	this.btnStart.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null
	&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment() != null
	&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	ApogyCoreInvocatorUIFacade.INSTANCE.initSession();
	}
	}
	});

	this.btnStop = new Button(composite, SWT.NONE);
	this.btnStop.setLayoutData(new GridData(SWT.LEFT, SWT.FILL, false, true, 1, 1));
	this.btnStop.setText("Stop");

	/*
	* Create the listener that disposes the variables of the environment when the
	* button is selected. This is to clear the instances
	*/
	this.btnStop.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null
	&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment() != null
	&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	ApogyCoreInvocatorUIFacade.INSTANCE.disposeSession();
	}
	}
	});

	this.txtInstanceStatus = new Text(composite, SWT.BORDER \| SWT.READ_ONLY);
	this.txtInstanceStatus.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_TRANSPARENT));
	GridData gd_txtInstanceStatus = new GridData(SWT.LEFT, SWT.FILL, false, false, 1, 1);
	gd_txtInstanceStatus.widthHint = 16;
	this.txtInstanceStatus.setLayoutData(gd_txtInstanceStatus);
	this.txtInstanceStatus.setEditable(false);

	this.m_bindingContext = customInitDataBindings();
	}

	/**
	* Disposes the actual parentComposite.
	*/
	@PreDestroy
	public void dispose() {
	this.m_bindingContext.dispose();
	}

	/**
	* Creates and returns the data bindings associated with the active session.
	*
	* @return Reference to the bindings.
	*/
	@SuppressWarnings("unchecked")
	protected DataBindingContext customInitDataBindings() {

	this.m_bindingContext = new DataBindingContext();
	IObservableValue<?> invocatorFacadeActiveInvocatorSessionObserveValue = EMFProperties
	.value(ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION)
	.observe(ApogyCoreInvocatorFacade.INSTANCE);

	/**
	* Data binding for the different elements of the UI to be enabled/disabled if
	* there is an active session or not
	*/
	IObservableValue<?> observeEnabledResetInstancesObserveWidget = WidgetProperties.enabled()
	.observe(this.btnStart);
	this.m_bindingContext.bindValue(observeEnabledResetInstancesObserveWidget,
	invocatorFacadeActiveInvocatorSessionObserveValue, null,
	new InvocatorInstanceToBooleanUpdateValueStrategy());

	IObservableValue<?> observeEnabledClearInstancesObserveWidget = WidgetProperties.enabled()
	.observe(this.btnStop);
	this.m_bindingContext.bindValue(observeEnabledClearInstancesObserveWidget,
	invocatorFacadeActiveInvocatorSessionObserveValue, null,
	new InvocatorInstanceToBooleanUpdateValueStrategy());

	IObservableValue<?> observeEnabledComboContextObserveWidget = WidgetProperties.enabled()
	.observe(this.comboViewerContext.getCombo());
	this.m_bindingContext.bindValue(observeEnabledComboContextObserveWidget,
	invocatorFacadeActiveInvocatorSessionObserveValue, null,
	new InvocatorInstanceToBooleanUpdateValueStrategy());
	IObservableValue<?> observeEnabledTxtInstanceStatusObserveWidget = WidgetProperties.enabled()
	.observe(this.txtInstanceStatus);
	this.m_bindingContext.bindValue(observeEnabledTxtInstanceStatusObserveWidget,
	invocatorFacadeActiveInvocatorSessionObserveValue, null,
	new InvocatorInstanceToBooleanUpdateValueStrategy());

	/** Data binding to get the name of the contexts for the combo box */
	IObservableList<?> invocatorFacadeEnvironmentContextsListContextsObserveValue = EMFProperties
	.list(FeaturePath.fromList(
	ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
	ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
	ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__CONTEXTS_LIST,
	ApogyCoreInvocatorPackage.Literals.CONTEXTS_LIST__CONTEXTS))
	.observe(ApogyCoreInvocatorFacade.INSTANCE);
	ViewerSupport.bind(this.comboViewerContext, invocatorFacadeEnvironmentContextsListContextsObserveValue,
	EMFProperties.value(ApogyCommonEMFPackage.Literals.NAMED__NAME));
	/**
	* Data binding to set the text value of the combo box to the active context
	*/
	IObservableValue<?> observeComboContextSingleSelectionIndexObserveWidget = WidgetProperties
	.singleSelectionIndex().observe(this.comboViewerContext.getCombo());
	IObservableValue<?> invocatorFacadeEnvironmentActiveContextObserveValue = EMFEditProperties
	.value(ApogyCommonTransactionFacade.INSTANCE.getDefaultEditingDomain(), FeaturePath.fromList(
	ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
	ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
	ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__ACTIVE_CONTEXT))
	.observe(ApogyCoreInvocatorFacade.INSTANCE);

	this.m_bindingContext.bindValue(observeComboContextSingleSelectionIndexObserveWidget,
	invocatorFacadeEnvironmentActiveContextObserveValue,
	new UpdateValueStrategy().setConverter(new Converter(Integer.class, Context.class) {

	@Override
	public Object convert(Object fromObject) {
	if (fromObject != null && (Integer) fromObject != -1
	&& ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
	if (!ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getContextsList().getContexts().get((Integer) fromObject).equals(null)) {

	return ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getContextsList().getContexts().get((Integer) fromObject);
	}
	}
	return null;
	}

	}),

	new UpdateValueStrategy().setConverter(new Converter(Context.class, Integer.class) {
	@Override
	public Object convert(Object arg0) {
	if (arg0 != null) {
	for (int i = 0; i < SessionStatusToolControl.this.comboViewerContext.getCombo()
	.getItemCount(); i++) {
	if (((Context) arg0).getName() != null && ((Context) arg0).getName().equals(
	SessionStatusToolControl.this.comboViewerContext.getCombo().getItem(i))) {
	return i;
	}
	}
	}
	return -1;
	}
	}));

	/*
	* Bind Status Indicator.
	*/
	IObservableValue<?> observeBackgroundInstanceStatusObserveWidget = WidgetProperties.background()
	.observe(this.txtInstanceStatus);
	IObservableValue<?> invocatorFacadeActiveContextCreationDateValue = EMFProperties
	.value(FeaturePath.fromList(
	ApogyCoreInvocatorPackage.Literals.APOGY_CORE_INVOCATOR_FACADE__ACTIVE_INVOCATOR_SESSION,
	ApogyCoreInvocatorPackage.Literals.INVOCATOR_SESSION__ENVIRONMENT,
	ApogyCoreInvocatorPackage.Literals.ENVIRONMENT__ACTIVE_CONTEXT,
	ApogyCoreInvocatorPackage.Literals.CONTEXT__VARIABLES_INSTANTIATED))
	.observe(ApogyCoreInvocatorFacade.INSTANCE);
	this.m_bindingContext.bindValue(observeBackgroundInstanceStatusObserveWidget,
	invocatorFacadeActiveContextCreationDateValue,
	new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER),
	new UpdateValueStrategy().setConverter(new Converter(Context.class, Color.class) {
	@Override
	public Object convert(Object fromObject) {
	int color = SWT.COLOR_TRANSPARENT;
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
	.getEnvironment() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext().isVariablesInstantiated()) {
	color = SWT.COLOR_GREEN;
	}
	}
	}
	}
	return Display.getCurrent().getSystemColor(color);
	}
	}));

	/*
	* Bind Start Enabled.
	*/
	IObservableValue<?> observeEnabledStartButton = WidgetProperties.enabled().observe(this.btnStart);
	this.m_bindingContext.bindValue(observeEnabledStartButton, invocatorFacadeActiveContextCreationDateValue,
	new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER),
	new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
	@Override
	public Object convert(Object fromObject) {
	boolean result = true;

	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() == null) {
	result = false;
	} else {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
	.getEnvironment() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext().isVariablesInstantiated()) {
	result = false;
	}
	}
	}
	}
	return result;
	}
	}));

	/*
	* Bind Stop Enabled.
	*/
	IObservableValue<?> observeEnabledStopButton = WidgetProperties.enabled().observe(this.btnStop);
	this.m_bindingContext.bindValue(observeEnabledStopButton, invocatorFacadeActiveContextCreationDateValue, null,
	new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
	@Override
	public Object convert(Object fromObject) {
	boolean result = false;
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
	.getEnvironment() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext().isVariablesInstantiated()) {
	result = true;
	}
	}
	}
	}
	return result;
	}
	}));

	/*
	* Bind Combo Box Enabled.
	*/
	IObservableValue<?> observeEnabledComboWidget = WidgetProperties.enabled()
	.observe(this.comboViewerContext.getCombo());
	this.m_bindingContext.bindValue(observeEnabledComboWidget, invocatorFacadeActiveContextCreationDateValue, null,
	new UpdateValueStrategy().setConverter(new Converter(Context.class, Boolean.class) {
	@Override
	public Object convert(Object fromObject) {
	boolean result = true;

	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession() == null) {
	result = false;
	} else {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession()
	.getEnvironment() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext() != null) {
	if (ApogyCoreInvocatorFacade.INSTANCE.getActiveInvocatorSession().getEnvironment()
	.getActiveContext().isVariablesInstantiated()) {
	result = false;
	}
	}
	}
	}
	return result;
	}
	}));

	return this.m_bindingContext;
	}

	/**
	* This class is used to convert a InvocatorSession to a boolean if there is an
	* InvocatorSession instance active
	*/
	private class InvocatorInstanceToBooleanUpdateValueStrategy extends UpdateValueStrategy {
	public InvocatorInstanceToBooleanUpdateValueStrategy() {
	setConverter(new Converter(InvocatorSession.class, Boolean.class) {
	@Override
	/**
	* @return true if there is an Invocator Session, false otherwise
	*/
	public Object convert(Object fromObject) {
	return fromObject != null;
	}
	});
	}
	}
	}