org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/OpenTypeHierarchyAction.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.ui.actions;

 import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;

 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.viewers.ISelectionProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;

 import org.eclipse.jface.text.ITextSelection;

 import org.eclipse.ui.IWorkbenchSite;
 import org.eclipse.ui.PlatformUI;

 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.IImportDeclaration;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IOrdinaryClassFile;
 import org.eclipse.jdt.core.IPackageFragment;
 import org.eclipse.jdt.core.IPackageFragmentRoot;
 import org.eclipse.jdt.core.IType;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.Signature;

 import org.eclipse.jdt.internal.corext.util.JavaModelUtil;

 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.IJavaStatusConstants;
 import org.eclipse.jdt.internal.ui.JavaPlugin;
 import org.eclipse.jdt.internal.ui.actions.ActionMessages;
 import org.eclipse.jdt.internal.ui.actions.ActionUtil;
 import org.eclipse.jdt.internal.ui.actions.SelectionConverter;
 import org.eclipse.jdt.internal.ui.browsing.LogicalPackage;
 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
 import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
 import org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil;

 /**
  * This action opens a type hierarchy on the selected type.
  * <p>
  * The action is applicable to selections containing elements of type
  * <code>IType</code>.
  *
  * <p>
  * This class may be instantiated; it is not intended to be subclassed.
  * </p>
  *
  * @since 2.0
  *
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class OpenTypeHierarchyAction extends SelectionDispatchAction {

 	private JavaEditor fEditor;

 	/**
 	 * Creates a new <code>OpenTypeHierarchyAction</code>. The action requires
 	 * that the selection provided by the site's selection provider is of type <code>
 	 * org.eclipse.jface.viewers.IStructuredSelection</code>.
 	 *
 	 * @param site the site providing context information for this action
 	 */
 	public OpenTypeHierarchyAction(IWorkbenchSite site) {
 		super(site);
 		setText(ActionMessages.OpenTypeHierarchyAction_label);
 		setToolTipText(ActionMessages.OpenTypeHierarchyAction_tooltip);
 		setDescription(ActionMessages.OpenTypeHierarchyAction_description);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.OPEN_TYPE_HIERARCHY_ACTION);
 	}

 	/**
 	 * Creates a new <code>OpenTypeHierarchyAction</code>. The action requires
 	 * that the selection provided by the given selection provider is of type <code>
 	 * org.eclipse.jface.viewers.IStructuredSelection</code>.
 	 *
 	 * @param site the site providing context information for this action
 	 * @param provider a special selection provider which is used instead
 	 *  of the site's selection provider or <code>null</code> to use the site's
 	 *  selection provider
 	 *
 	 * @since 3.2
 	 * @deprecated Use {@link #setSpecialSelectionProvider(ISelectionProvider)} instead. This API will be
 	 * removed after 3.2 M5.
      */
     @Deprecated
 	public OpenTypeHierarchyAction(IWorkbenchSite site, ISelectionProvider provider) {
         this(site);
         setSpecialSelectionProvider(provider);
     }


 	/**
 	 * Note: This constructor is for internal use only. Clients should not call this constructor.
 	 * @param editor the Java editor
 	 *
 	 * @noreference This constructor is not intended to be referenced by clients.
 	 */
 	public OpenTypeHierarchyAction(JavaEditor editor) {
 		this(editor.getEditorSite());
 		fEditor= editor;
 		setEnabled(SelectionConverter.canOperateOn(fEditor));
 	}

 	@Override
 	public void selectionChanged(ITextSelection selection) {
 	}

 	@Override
 	public void selectionChanged(IStructuredSelection selection) {
 		setEnabled(isEnabled(selection));
 	}

 	private boolean isEnabled(IStructuredSelection selection) {
 		Object[] elements= selection.toArray();
 		if (elements.length == 0)
 			return false;

 		if (elements.length == 1) {
 			Object input= elements[0];
 			if (input instanceof LogicalPackage)
 				return true;
 			if (!(input instanceof IJavaElement))
 				return false;

 			switch (((IJavaElement)input).getElementType()) {
 				case IJavaElement.INITIALIZER:
 				case IJavaElement.METHOD:
 				case IJavaElement.FIELD:
 				case IJavaElement.TYPE:
 				case IJavaElement.IMPORT_DECLARATION:
 				case IJavaElement.CLASS_FILE:
 				case IJavaElement.COMPILATION_UNIT:
 					return true;
 				case IJavaElement.LOCAL_VARIABLE:
 				case IJavaElement.TYPE_PARAMETER:
 				case IJavaElement.ANNOTATION:
 					return false;
 				default:
 					// continue below
 			}
 		}

 		// strategy: allow non-IJavaElements (e.g. an IResource), but stop for invalid IJavaElements
 		boolean hasValidElement= false;
 		for (int j= 0; j < elements.length; j++) {
 			Object input= elements[j];
 			if (input instanceof LogicalPackage) {
 				hasValidElement= true;
 				continue;
 			}
 			if (!(input instanceof IJavaElement))
 				continue;

 			switch (((IJavaElement)input).getElementType()) {
 				case IJavaElement.PACKAGE_FRAGMENT_ROOT:
 				case IJavaElement.JAVA_PROJECT:
 				case IJavaElement.PACKAGE_FRAGMENT:
 				case IJavaElement.PACKAGE_DECLARATION:
 					hasValidElement= true;
 					continue;
 				default:
 					return false;
 			}
 		}
 		return hasValidElement;
 	}

 	@Override
 	public void run(ITextSelection selection) {
 		IJavaElement input= SelectionConverter.getInput(fEditor);
 		if (!ActionUtil.isProcessable(getShell(), input))
 			return;

 		try {
 			IJavaElement[] elements= SelectionConverter.codeResolveOrInputForked(fEditor);
 			if (elements == null)
 				return;
 			List<IJavaElement> candidates= new ArrayList<>(elements.length);
 			for (int i= 0; i < elements.length; i++) {
 				IJavaElement[] resolvedElements= OpenTypeHierarchyUtil.getCandidates(elements[i]);
 				if (resolvedElements != null)
 					candidates.addAll(Arrays.asList(resolvedElements));
 			}
 			run(candidates.toArray(new IJavaElement[candidates.size()]));
 		} catch (InvocationTargetException e) {
 			ExceptionHandler.handle(e, getShell(), getDialogTitle(), ActionMessages.SelectionConverter_codeResolve_failed);
 		} catch (InterruptedException e) {
 			// cancelled
 		}
 	}

 	@Override
 	public void run(IStructuredSelection selection) {
 		List<IJavaElement> validElements= new ArrayList<>();
 		Object[] selectedElements= selection.toArray();

 		for (int i= 0; i < selectedElements.length; i++) {
 			Object input= selectedElements[i];
 			if (input instanceof LogicalPackage) {
 				IPackageFragment[] fragments= ((LogicalPackage)input).getFragments();
 				if (fragments.length == 0)
 					continue;
 				validElements.addAll(Arrays.asList(fragments));
 			} else if (input instanceof IPackageFragment) {
 				IPackageFragment fragment= (IPackageFragment)input;
 				IPackageFragmentRoot[] roots;
 				try {
 					roots= fragment.getJavaProject().getPackageFragmentRoots();
 				} catch (JavaModelException e) {
 					JavaPlugin.log(e);
 					continue;
 				}
 				String name= fragment.getElementName();
 				for (int j= 0; j < roots.length; j++) {
 					IPackageFragment pack= roots[j].getPackageFragment(name);
 					if (pack.exists())
 						validElements.add(pack);
 				}
 			} else {
 				if (!(input instanceof IJavaElement) || !ActionUtil.isProcessable(getShell(), (IJavaElement)input))
 					continue;
 				IJavaElement element= (IJavaElement)input;
 				validElements.add(element);
 			}
 		}
 		if (validElements.size() == 0) {
 			IStatus status= createStatus(ActionMessages.OpenTypeHierarchyAction_messages_no_java_elements);
 			ErrorDialog.openError(getShell(), getDialogTitle(), ActionMessages.OpenTypeHierarchyAction_messages_title, status);
 			return;
 		}
 		List<IJavaElement> result= new ArrayList<>();
 		IStatus status= compileCandidates(result, validElements);
 		if (status.isOK()) {
 			run(result.toArray(new IJavaElement[result.size()]));
 		} else {
 			ErrorDialog.openError(getShell(), getDialogTitle(), ActionMessages.OpenTypeHierarchyAction_messages_title, status);
 		}
 	}

 	/*
 	 * No Javadoc since the method isn't meant to be public but is
 	 * since the beginning
 	 */
 	public void run(IJavaElement[] elements) {
 		if (elements.length == 0) {
 			getShell().getDisplay().beep();
 			return;
 		}
 		OpenTypeHierarchyUtil.open(elements, getSite().getWorkbenchWindow());
 	}

 	private static String getDialogTitle() {
 		return ActionMessages.OpenTypeHierarchyAction_dialog_title;
 	}

 	private static IStatus compileCandidates(List<IJavaElement> result, List<IJavaElement> elements) {
 		IStatus ok= Status.OK_STATUS;
 		boolean onlyContainers= true;
 		for (Iterator<IJavaElement> iter= elements.iterator(); iter.hasNext();) {
 			IJavaElement elem= iter.next();
 			try {
 				switch (elem.getElementType()) {
 					case IJavaElement.INITIALIZER:
 					case IJavaElement.METHOD:
 					case IJavaElement.FIELD:
 					case IJavaElement.TYPE:
 						onlyContainers= false;
 						//$FALL-THROUGH$
 					case IJavaElement.PACKAGE_FRAGMENT_ROOT:
 					case IJavaElement.JAVA_PROJECT:
 						result.add(elem);
 						break;
 					case IJavaElement.PACKAGE_FRAGMENT:
 						if (((IPackageFragment)elem).containsJavaResources())
 							result.add(elem);
 						break;
 					case IJavaElement.PACKAGE_DECLARATION:
 						result.add(elem.getAncestor(IJavaElement.PACKAGE_FRAGMENT));
 						break;
 					case IJavaElement.IMPORT_DECLARATION:
 						IImportDeclaration decl= (IImportDeclaration)elem;
 						if (decl.isOnDemand())
 							elem= JavaModelUtil.findTypeContainer(elem.getJavaProject(), Signature.getQualifier(elem.getElementName()));
 						else
 							elem= elem.getJavaProject().findType(elem.getElementName());
 						if (elem != null) {
 							onlyContainers= false;
 							result.add(elem);
 						}
 						break;
 					case IJavaElement.CLASS_FILE:
 						if (elem instanceof IOrdinaryClassFile) {
 							onlyContainers= false;
 							result.add(((IOrdinaryClassFile) elem).getType());
 						}
 						break;
 					case IJavaElement.COMPILATION_UNIT:
 						ICompilationUnit cu= (ICompilationUnit)elem;
 						IType[] types= cu.getTypes();
 						if (types.length > 0) {
 							onlyContainers= false;
 							result.addAll(Arrays.asList(types));
 						}
 				}
 			} catch (JavaModelException e) {
 				return e.getStatus();
 			}
 		}
 		int size= result.size();
 		if (size == 0 || (size > 1 && !onlyContainers))
 			return createStatus(ActionMessages.OpenTypeHierarchyAction_messages_no_valid_java_element);
 		return ok;
 	}

 	private static IStatus createStatus(String message) {
 		return new Status(IStatus.INFO, JavaPlugin.getPluginId(), IJavaStatusConstants.INTERNAL_ERROR, message, null);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.ui.actions;

	import java.lang.reflect.InvocationTargetException;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;

	import org.eclipse.jface.dialogs.ErrorDialog;
	import org.eclipse.jface.viewers.ISelectionProvider;
	import org.eclipse.jface.viewers.IStructuredSelection;

	import org.eclipse.jface.text.ITextSelection;

	import org.eclipse.ui.IWorkbenchSite;
	import org.eclipse.ui.PlatformUI;

	import org.eclipse.jdt.core.ICompilationUnit;
	import org.eclipse.jdt.core.IImportDeclaration;
	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IOrdinaryClassFile;
	import org.eclipse.jdt.core.IPackageFragment;
	import org.eclipse.jdt.core.IPackageFragmentRoot;
	import org.eclipse.jdt.core.IType;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.Signature;

	import org.eclipse.jdt.internal.corext.util.JavaModelUtil;

	import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
	import org.eclipse.jdt.internal.ui.IJavaStatusConstants;
	import org.eclipse.jdt.internal.ui.JavaPlugin;
	import org.eclipse.jdt.internal.ui.actions.ActionMessages;
	import org.eclipse.jdt.internal.ui.actions.ActionUtil;
	import org.eclipse.jdt.internal.ui.actions.SelectionConverter;
	import org.eclipse.jdt.internal.ui.browsing.LogicalPackage;
	import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
	import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
	import org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil;

	/**
	* This action opens a type hierarchy on the selected type.
	* <p>
	* The action is applicable to selections containing elements of type
	* <code>IType</code>.
	*
	* <p>
	* This class may be instantiated; it is not intended to be subclassed.
	* </p>
	*
	* @since 2.0
	*
	* @noextend This class is not intended to be subclassed by clients.
	*/
	public class OpenTypeHierarchyAction extends SelectionDispatchAction {

	private JavaEditor fEditor;

	/**
	* Creates a new <code>OpenTypeHierarchyAction</code>. The action requires
	* that the selection provided by the site's selection provider is of type <code>
	* org.eclipse.jface.viewers.IStructuredSelection</code>.
	*
	* @param site the site providing context information for this action
	*/
	public OpenTypeHierarchyAction(IWorkbenchSite site) {
	super(site);
	setText(ActionMessages.OpenTypeHierarchyAction_label);
	setToolTipText(ActionMessages.OpenTypeHierarchyAction_tooltip);
	setDescription(ActionMessages.OpenTypeHierarchyAction_description);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.OPEN_TYPE_HIERARCHY_ACTION);
	}

	/**
	* Creates a new <code>OpenTypeHierarchyAction</code>. The action requires
	* that the selection provided by the given selection provider is of type <code>
	* org.eclipse.jface.viewers.IStructuredSelection</code>.
	*
	* @param site the site providing context information for this action
	* @param provider a special selection provider which is used instead
	* of the site's selection provider or <code>null</code> to use the site's
	* selection provider
	*
	* @since 3.2
	* @deprecated Use {@link #setSpecialSelectionProvider(ISelectionProvider)} instead. This API will be
	* removed after 3.2 M5.
	*/
	@Deprecated
	public OpenTypeHierarchyAction(IWorkbenchSite site, ISelectionProvider provider) {
	this(site);
	setSpecialSelectionProvider(provider);
	}


	/**
	* Note: This constructor is for internal use only. Clients should not call this constructor.
	* @param editor the Java editor
	*
	* @noreference This constructor is not intended to be referenced by clients.
	*/
	public OpenTypeHierarchyAction(JavaEditor editor) {
	this(editor.getEditorSite());
	fEditor= editor;
	setEnabled(SelectionConverter.canOperateOn(fEditor));
	}

	@Override
	public void selectionChanged(ITextSelection selection) {
	}

	@Override
	public void selectionChanged(IStructuredSelection selection) {
	setEnabled(isEnabled(selection));
	}

	private boolean isEnabled(IStructuredSelection selection) {
	Object[] elements= selection.toArray();
	if (elements.length == 0)
	return false;

	if (elements.length == 1) {
	Object input= elements[0];
	if (input instanceof LogicalPackage)
	return true;
	if (!(input instanceof IJavaElement))
	return false;

	switch (((IJavaElement)input).getElementType()) {
	case IJavaElement.INITIALIZER:
	case IJavaElement.METHOD:
	case IJavaElement.FIELD:
	case IJavaElement.TYPE:
	case IJavaElement.IMPORT_DECLARATION:
	case IJavaElement.CLASS_FILE:
	case IJavaElement.COMPILATION_UNIT:
	return true;
	case IJavaElement.LOCAL_VARIABLE:
	case IJavaElement.TYPE_PARAMETER:
	case IJavaElement.ANNOTATION:
	return false;
	default:
	// continue below
	}
	}

	// strategy: allow non-IJavaElements (e.g. an IResource), but stop for invalid IJavaElements
	boolean hasValidElement= false;
	for (int j= 0; j < elements.length; j++) {
	Object input= elements[j];
	if (input instanceof LogicalPackage) {
	hasValidElement= true;
	continue;
	}
	if (!(input instanceof IJavaElement))
	continue;

	switch (((IJavaElement)input).getElementType()) {
	case IJavaElement.PACKAGE_FRAGMENT_ROOT:
	case IJavaElement.JAVA_PROJECT:
	case IJavaElement.PACKAGE_FRAGMENT:
	case IJavaElement.PACKAGE_DECLARATION:
	hasValidElement= true;
	continue;
	default:
	return false;
	}
	}
	return hasValidElement;
	}

	@Override
	public void run(ITextSelection selection) {
	IJavaElement input= SelectionConverter.getInput(fEditor);
	if (!ActionUtil.isProcessable(getShell(), input))
	return;

	try {
	IJavaElement[] elements= SelectionConverter.codeResolveOrInputForked(fEditor);
	if (elements == null)
	return;
	List<IJavaElement> candidates= new ArrayList<>(elements.length);
	for (int i= 0; i < elements.length; i++) {
	IJavaElement[] resolvedElements= OpenTypeHierarchyUtil.getCandidates(elements[i]);
	if (resolvedElements != null)
	candidates.addAll(Arrays.asList(resolvedElements));
	}
	run(candidates.toArray(new IJavaElement[candidates.size()]));
	} catch (InvocationTargetException e) {
	ExceptionHandler.handle(e, getShell(), getDialogTitle(), ActionMessages.SelectionConverter_codeResolve_failed);
	} catch (InterruptedException e) {
	// cancelled
	}
	}

	@Override
	public void run(IStructuredSelection selection) {
	List<IJavaElement> validElements= new ArrayList<>();
	Object[] selectedElements= selection.toArray();

	for (int i= 0; i < selectedElements.length; i++) {
	Object input= selectedElements[i];
	if (input instanceof LogicalPackage) {
	IPackageFragment[] fragments= ((LogicalPackage)input).getFragments();
	if (fragments.length == 0)
	continue;
	validElements.addAll(Arrays.asList(fragments));
	} else if (input instanceof IPackageFragment) {
	IPackageFragment fragment= (IPackageFragment)input;
	IPackageFragmentRoot[] roots;
	try {
	roots= fragment.getJavaProject().getPackageFragmentRoots();
	} catch (JavaModelException e) {
	JavaPlugin.log(e);
	continue;
	}
	String name= fragment.getElementName();
	for (int j= 0; j < roots.length; j++) {
	IPackageFragment pack= roots[j].getPackageFragment(name);
	if (pack.exists())
	validElements.add(pack);
	}
	} else {
	if (!(input instanceof IJavaElement) \|\| !ActionUtil.isProcessable(getShell(), (IJavaElement)input))
	continue;
	IJavaElement element= (IJavaElement)input;
	validElements.add(element);
	}
	}
	if (validElements.size() == 0) {
	IStatus status= createStatus(ActionMessages.OpenTypeHierarchyAction_messages_no_java_elements);
	ErrorDialog.openError(getShell(), getDialogTitle(), ActionMessages.OpenTypeHierarchyAction_messages_title, status);
	return;
	}
	List<IJavaElement> result= new ArrayList<>();
	IStatus status= compileCandidates(result, validElements);
	if (status.isOK()) {
	run(result.toArray(new IJavaElement[result.size()]));
	} else {
	ErrorDialog.openError(getShell(), getDialogTitle(), ActionMessages.OpenTypeHierarchyAction_messages_title, status);
	}
	}

	/*
	* No Javadoc since the method isn't meant to be public but is
	* since the beginning
	*/
	public void run(IJavaElement[] elements) {
	if (elements.length == 0) {
	getShell().getDisplay().beep();
	return;
	}
	OpenTypeHierarchyUtil.open(elements, getSite().getWorkbenchWindow());
	}

	private static String getDialogTitle() {
	return ActionMessages.OpenTypeHierarchyAction_dialog_title;
	}

	private static IStatus compileCandidates(List<IJavaElement> result, List<IJavaElement> elements) {
	IStatus ok= Status.OK_STATUS;
	boolean onlyContainers= true;
	for (Iterator<IJavaElement> iter= elements.iterator(); iter.hasNext();) {
	IJavaElement elem= iter.next();
	try {
	switch (elem.getElementType()) {
	case IJavaElement.INITIALIZER:
	case IJavaElement.METHOD:
	case IJavaElement.FIELD:
	case IJavaElement.TYPE:
	onlyContainers= false;
	//$FALL-THROUGH$
	case IJavaElement.PACKAGE_FRAGMENT_ROOT:
	case IJavaElement.JAVA_PROJECT:
	result.add(elem);
	break;
	case IJavaElement.PACKAGE_FRAGMENT:
	if (((IPackageFragment)elem).containsJavaResources())
	result.add(elem);
	break;
	case IJavaElement.PACKAGE_DECLARATION:
	result.add(elem.getAncestor(IJavaElement.PACKAGE_FRAGMENT));
	break;
	case IJavaElement.IMPORT_DECLARATION:
	IImportDeclaration decl= (IImportDeclaration)elem;
	if (decl.isOnDemand())
	elem= JavaModelUtil.findTypeContainer(elem.getJavaProject(), Signature.getQualifier(elem.getElementName()));
	else
	elem= elem.getJavaProject().findType(elem.getElementName());
	if (elem != null) {
	onlyContainers= false;
	result.add(elem);
	}
	break;
	case IJavaElement.CLASS_FILE:
	if (elem instanceof IOrdinaryClassFile) {
	onlyContainers= false;
	result.add(((IOrdinaryClassFile) elem).getType());
	}
	break;
	case IJavaElement.COMPILATION_UNIT:
	ICompilationUnit cu= (ICompilationUnit)elem;
	IType[] types= cu.getTypes();
	if (types.length > 0) {
	onlyContainers= false;
	result.addAll(Arrays.asList(types));
	}
	}
	} catch (JavaModelException e) {
	return e.getStatus();
	}
	}
	int size= result.size();
	if (size == 0 \|\| (size > 1 && !onlyContainers))
	return createStatus(ActionMessages.OpenTypeHierarchyAction_messages_no_valid_java_element);
	return ok;
	}

	private static IStatus createStatus(String message) {
	return new Status(IStatus.INFO, JavaPlugin.getPluginId(), IJavaStatusConstants.INTERNAL_ERROR, message, null);
	}
	}