Add an utility to post on Problems view

Also add a couple on simple methods in EntityView

plugins/contracts/org.polarsys.chess.contracts.profile/src/org/polarsys/chess/contracts/profile/chesscontract/util/EntityUtil.java

@@ -1836,6 +1836,14 @@ public class EntityUtil {
 		return transitions;
 	}
 
+	public EList<Transition> getOutgoingTransitions(Vertex state) {
+		return state.getOutgoings();
+	}
+		
+	public EList<Transition> getIncomingTransitions(Vertex state) {
+		return state.getIncomings();
+	}
+	
 	public String getSignalEventName(Trigger trigger) {
 
 		if (trigger.getEvent() instanceof SignalEvent) {

plugins/org.polarsys.chess.service/src/org/polarsys/chess/service/gui/utils/ReportProblemsUtil.java

+/*******************************************************************************
+ * Copyright (C) 2020 Fondazione Bruno Kessler.
+ * 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:
+ *     Luca Cristoforetti - initial API and implementation
+ ******************************************************************************/
+package org.polarsys.chess.service.gui.utils;
+
+import java.util.HashMap;
+
+import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.CoreException;
+
+/**
+ * An utility class to post messages to the Problems tab.
+ * 
+ * @author cristofo
+ *
+ */
+public class ReportProblemsUtil {
+	
+	/**
+	 * Deletes all markers on this resource.
+	 * @param resource the resource
+	 * @throws CoreException
+	 */
+	public static void cleanResource(IResource resource) throws CoreException {
+	    resource.deleteMarkers(null, true, IResource.DEPTH_INFINITE);		
+	}
+	
+	/**
+	 * Reports a warning in the Problems tab.
+	 * @param resource the resource
+	 * @param msg the message to display
+	 * @param lineNumber the line to select (or 0)
+	 * @param charStart the start of selection (or 0)
+	 * @param charEnd the end of seletion (or 0)
+	 * @return the created IMarker
+	 * @throws CoreException
+	 * @throws NullPointerException
+	 */
+	public static IMarker reportWarning(IResource resource, String msg, int lineNumber, 
+			int charStart, int charEnd) throws CoreException, NullPointerException {
+		return reportMessage(resource, msg, lineNumber, charStart, charEnd, 
+				IMarker.PROBLEM, IMarker.SEVERITY_WARNING);
+	}
+
+	/**
+	 * Reports an error in the Problems tab.
+	 * @param resource the resource
+	 * @param msg the message to display
+	 * @param lineNumber the line to select (or 0)
+	 * @param charStart the start of selection (or 0)
+	 * @param charEnd the end of seletion (or 0)
+	 * @return the created IMarker
+	 * @throws CoreException
+	 * @throws NullPointerException
+	 */
+	public static IMarker reportError(IResource resource, String msg, int lineNumber, 
+			int charStart, int charEnd) throws CoreException, NullPointerException {
+		return reportMessage(resource, msg, lineNumber, charStart, charEnd, 
+				IMarker.PROBLEM, IMarker.SEVERITY_ERROR);
+	}
+
+	/**
+	 * Reports an info in the Problems tab.
+	 * @param resource the resource
+	 * @param msg the message to display
+	 * @param lineNumber the line to select (or 0)
+	 * @param charStart the start of selection (or 0)
+	 * @param charEnd the end of seletion (or 0)
+	 * @return the created IMarker
+	 * @throws CoreException
+	 * @throws NullPointerException
+	 */
+	public static IMarker reportInfo(IResource resource, String msg, int lineNumber, 
+			int charStart, int charEnd) throws CoreException, NullPointerException {
+		return reportMessage(resource, msg, lineNumber, charStart, charEnd, 
+				IMarker.PROBLEM, IMarker.SEVERITY_INFO);
+	}
+
+	private static IMarker reportMessage(IResource resource, String msg, int lineNumber, int charStart, 
+			int charEnd, String type, int severity) throws CoreException, NullPointerException {
+		if (resource == null) {
+			throw new NullPointerException("Resource is null");
+		}
+		
+		IMarker m = resource.createMarker(type);
+		
+		HashMap<String, Object> attributes = new HashMap<String, Object>();
+		attributes.put(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_HIGH));
+		attributes.put(IMarker.SEVERITY, new Integer(severity));
+		if (lineNumber > 0) attributes.put(IMarker.LINE_NUMBER, new Integer(lineNumber));
+		attributes.put(IMarker.MESSAGE, msg);
+		if (charStart > 0) attributes.put(IMarker.CHAR_START, new Integer(charStart)); // Note: this value is from the beginning of the document
+		if (charEnd > 0) attributes.put(IMarker.CHAR_END, new Integer(charEnd)); // Note: this value is from the beginning of the document
+//		m.setAttribute(IMarker.LOCATION, "whole file");	// This is a generic info about location
+
+		m.setAttributes(attributes);
+		return m;
+	}
+}