Bug 479041 - NullPointerException in

CompletionProposalUtils.getQualifiedNameLabelWithSufficientDepth (135)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=479041

Change-Id: Ic734e00a61dc5a845f458b6ac75c2656c617ffbe
Signed-off-by: Mickael ADAM <mickael.adam@ALL4TEC.net>

1 files changed, 180 insertions, 166 deletions

diff --git a/plugins/uml/xtext/org.eclipse.papyrus.uml.xtext.integration.ui/src/org/eclipse/papyrus/uml/xtext/integration/CompletionProposalUtils.java b/plugins/uml/xtext/org.eclipse.papyrus.uml.xtext.integration.ui/src/org/eclipse/papyrus/uml/xtext/integration/CompletionProposalUtils.java
index aa3d1e533a3..4936b3e0286 100644
--- a/plugins/uml/xtext/org.eclipse.papyrus.uml.xtext.integration.ui/src/org/eclipse/papyrus/uml/xtext/integration/CompletionProposalUtils.java
+++ b/plugins/uml/xtext/org.eclipse.papyrus.uml.xtext.integration.ui/src/org/eclipse/papyrus/uml/xtext/integration/CompletionProposalUtils.java
@@ -1,166 +1,180 @@
-/*****************************************************************************

- * Copyright (c) 2010 CEA LIST.

- *

- *

- * 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:

- *  CEA LIST - Initial API and implementation

- *

- *****************************************************************************/

-

-package org.eclipse.papyrus.uml.xtext.integration;

-

-import java.util.ArrayList;

-import java.util.List;

-

-import org.eclipse.jface.viewers.ILabelProvider;

-import org.eclipse.papyrus.infra.core.utils.DisplayUtils;

-import org.eclipse.uml2.uml.Element;

-import org.eclipse.uml2.uml.NamedElement;

-import org.eclipse.uml2.uml.Namespace;

-import org.eclipse.uml2.uml.Package;

-import org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext;

-

-/**

- * @author CEA LIST - Initial contribution and API

- */

-@SuppressWarnings("nls")

-public class CompletionProposalUtils {

-

-	protected final static ILabelProvider labelProvider = DisplayUtils.getLabelProvider();

-

-	/**

-	 * Public Utility method for creating a completion proposal

-	 *

-	 * @param namedElement

-	 *            The named element for which completion proposal must be created

-	 * @param completionString

-	 *            The actual completion string

-	 * @param displayString

-	 *            The way the completion is displayed in the completion list

-	 * @param context

-	 *            Some information related to the context of the completion

-	 * @return completion proposal

-	 */

-	public static CustomCompletionProposal createCompletionProposal(NamedElement namedElement,

-			String completionString,

-			String displayString,

-			ContentAssistContext context) {

-		String additionalProposalInfo = "" + namedElement.getQualifiedName() + "\n" + '(' + namedElement.eClass().getName() + ')';

-

-		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted

-				context.getOffset(), // Offset

-				context.getSelectedText().length(), // Replacement length

-				completionString.length(), // cursorPosition

-				labelProvider.getImage(namedElement), // image

-				" " + displayString, // displayString

-				null, // contextInformation

-				additionalProposalInfo, // additionalProposalInfo

-				context);

-		return completionProposal;

-	}

-

-	/**

-	 * Public Utility method for creating a completion proposal with replacement of prefix

-	 *

-	 * @param namedElement

-	 *            The named element for which completion proposal must be created

-	 * @param completionString

-	 *            The actual completion string

-	 * @param displayString

-	 *            The way the completion is displayed in the completion list

-	 * @param context

-	 *            Some information related to the context of the completion

-	 * @return completion proposal

-	 */

-	public static CustomCompletionProposal createCompletionProposalWithReplacementOfPrefix(NamedElement namedElement,

-			String completionString,

-			String displayString,

-			ContentAssistContext context) {

-		String additionalProposalInfo = "" + namedElement.getQualifiedName() + "\n" + '(' + namedElement.eClass().getName() + ')';

-

-		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted

-				context.getOffset() - context.getPrefix().length(), // Offset

-				context.getPrefix().length(), // Replacement length

-				completionString.length(), // cursorPosition

-				labelProvider.getImage(namedElement), // image

-				" " + displayString, // displayString

-				null, // contextInformation

-				additionalProposalInfo, // additionalProposalInfo

-				context);

-		return completionProposal;

-	}

-

-	/**

-	 * Public Utility method for creating a completion proposal

-	 *

-	 * @param completionString

-	 *            The actual completion string

-	 * @param displayString

-	 *            The way the completion is displayed in the completion list

-	 * @param context

-	 *            Some information related to the context of the completion

-	 * @return completion proposal

-	 */

-	public static CustomCompletionProposal createCompletionProposal(String completionString,

-			String displayString,

-			ContentAssistContext context) {

-

-		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted

-				context.getOffset(), // Offset

-				context.getSelectedText().length(), // Replacement length

-				completionString.length(), // cursorPosition

-				null, // image

-				" " + displayString, // displayString

-				null, // contextInformation

-				null, // additionalProposalInfo

-				context);

-		return completionProposal;

-	}

-

-	/**

-	 * Public utility method that computes a qualified name, taking into account packages imported by the namespace model

-	 *

-	 * @param namedElement

-	 * @param model

-	 * @return the qualified name label

-	 */

-	public static String getQualifiedNameLabelWithSufficientDepth(NamedElement namedElement, Namespace model) {

-		String label = "";

-

-		List<Package> importedPackages = new ArrayList<Package>(model.getImportedPackages());

-

-		List<Namespace> visitedNamespaces = new ArrayList<Namespace>();

-		Namespace currentNamespace = namedElement.getNamespace();

-

-		boolean rootFound = false;

-		boolean modelIsTheRoot = false;

-

-		while (currentNamespace != null && !rootFound) {

-			visitedNamespaces.add(currentNamespace);

-			if (importedPackages.contains(currentNamespace) || currentNamespace == model) {

-				rootFound = true;

-				if (currentNamespace == model) {

-					modelIsTheRoot = true;

-				}

-			}

-			Element owner = currentNamespace.getOwner();

-			while (owner != null && !(owner instanceof Namespace)) {

-				owner = owner.getOwner();

-			}

-

-			currentNamespace = owner != null ? (Namespace) owner : null;

-		}

-

-		for (int i = visitedNamespaces.size() - 1 - (modelIsTheRoot ? 1 : 0); i >= 0; i--) {

-			label += visitedNamespaces.get(i).getName() + "::";

-		}

-

-		return label + namedElement.getName();

-	}

-

-}

+/*****************************************************************************
+ * Copyright (c) 2010 CEA LIST.
+ *
+ *
+ * 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:
+ *  CEA LIST - Initial API and implementation
+ *  Mickael ADAM (ALL4TEC) mickael.adam@all4tec.net - bug 479041
+ *
+ *****************************************************************************/
+
+package org.eclipse.papyrus.uml.xtext.integration;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.viewers.ILabelProvider;
+import org.eclipse.papyrus.infra.core.utils.DisplayUtils;
+import org.eclipse.uml2.uml.Element;
+import org.eclipse.uml2.uml.NamedElement;
+import org.eclipse.uml2.uml.Namespace;
+import org.eclipse.uml2.uml.Package;
+import org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext;
+
+/**
+ * @author CEA LIST - Initial contribution and API
+ */
+@SuppressWarnings("nls")
+public class CompletionProposalUtils {
+
+	protected final static ILabelProvider labelProvider = DisplayUtils.getLabelProvider();
+
+	/**
+	 * Public Utility method for creating a completion proposal
+	 *
+	 * @param namedElement
+	 *            The named element for which completion proposal must be created
+	 * @param completionString
+	 *            The actual completion string
+	 * @param displayString
+	 *            The way the completion is displayed in the completion list
+	 * @param context
+	 *            Some information related to the context of the completion
+	 * @return completion proposal
+	 */
+	public static CustomCompletionProposal createCompletionProposal(NamedElement namedElement,
+			String completionString,
+			String displayString,
+			ContentAssistContext context) {
+		String additionalProposalInfo = "" + namedElement.getQualifiedName() + "\n" + '(' + namedElement.eClass().getName() + ')';
+
+		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted
+				context.getOffset(), // Offset
+				context.getSelectedText().length(), // Replacement length
+				completionString.length(), // cursorPosition
+				labelProvider.getImage(namedElement), // image
+				" " + displayString, // displayString
+				null, // contextInformation
+				additionalProposalInfo, // additionalProposalInfo
+				context);
+		return completionProposal;
+	}
+
+	/**
+	 * Public Utility method for creating a completion proposal with replacement of prefix
+	 *
+	 * @param namedElement
+	 *            The named element for which completion proposal must be created
+	 * @param completionString
+	 *            The actual completion string
+	 * @param displayString
+	 *            The way the completion is displayed in the completion list
+	 * @param context
+	 *            Some information related to the context of the completion
+	 * @return completion proposal
+	 */
+	public static CustomCompletionProposal createCompletionProposalWithReplacementOfPrefix(NamedElement namedElement,
+			String completionString,
+			String displayString,
+			ContentAssistContext context) {
+		String additionalProposalInfo = "" + namedElement.getQualifiedName() + "\n" + '(' + namedElement.eClass().getName() + ')';
+
+		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted
+				context.getOffset() - context.getPrefix().length(), // Offset
+				context.getPrefix().length(), // Replacement length
+				completionString.length(), // cursorPosition
+				labelProvider.getImage(namedElement), // image
+				" " + displayString, // displayString
+				null, // contextInformation
+				additionalProposalInfo, // additionalProposalInfo
+				context);
+		return completionProposal;
+	}
+
+	/**
+	 * Public Utility method for creating a completion proposal
+	 *
+	 * @param completionString
+	 *            The actual completion string
+	 * @param displayString
+	 *            The way the completion is displayed in the completion list
+	 * @param context
+	 *            Some information related to the context of the completion
+	 * @return completion proposal
+	 */
+	public static CustomCompletionProposal createCompletionProposal(String completionString,
+			String displayString,
+			ContentAssistContext context) {
+
+		CustomCompletionProposal completionProposal = new CustomCompletionProposal(completionString, // String to be inserted
+				context.getOffset(), // Offset
+				context.getSelectedText().length(), // Replacement length
+				completionString.length(), // cursorPosition
+				null, // image
+				" " + displayString, // displayString
+				null, // contextInformation
+				null, // additionalProposalInfo
+				context);
+		return completionProposal;
+	}
+
+	/**
+	 * Public utility method that computes a qualified name, taking into account packages imported by the namespace model
+	 *
+	 * @param namedElement
+	 * @param model
+	 * @return the qualified name label
+	 */
+	public static String getQualifiedNameLabelWithSufficientDepth(final NamedElement namedElement, final Namespace model) {
+		Assert.isNotNull(namedElement);
+
+		StringBuffer label = new StringBuffer();
+
+		List<Package> importedPackages = null;
+		if (null != model) {
+			importedPackages = new ArrayList<Package>(model.getImportedPackages());
+		}
+
+		List<Namespace> visitedNamespaces = new ArrayList<Namespace>();
+		Namespace currentNamespace = namedElement.getNamespace();
+
+		boolean rootFound = false;
+		boolean modelIsTheRoot = false;
+
+		while (currentNamespace != null && !rootFound) {
+			visitedNamespaces.add(currentNamespace);
+
+			if (null != importedPackages && (importedPackages.contains(currentNamespace) || currentNamespace.equals(model))) {
+				rootFound = true;
+				if (currentNamespace.equals(model)) {
+					modelIsTheRoot = true;
+				}
+			}
+
+			Element owner = currentNamespace.getOwner();
+			while (null != owner && !(owner instanceof Namespace)) {
+				owner = owner.getOwner();
+			}
+
+			currentNamespace = owner != null ? (Namespace) owner : null;
+		}
+
+		int qualifiedNameDepht = visitedNamespaces.size() - 1 - (modelIsTheRoot ? 1 : 0);
+
+		for (int i = qualifiedNameDepht; i >= 0; i--) {
+			label.append(visitedNamespaces.get(i).getName());
+			label.append("::");//$NON-NLS-1$
+		}
+
+		label.append(namedElement.getName());
+
+		return label.toString();
+	}
+
+}