Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / ui / actions / OpenImplementationAction.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/ui/actions/OpenImplementationAction.java b/case-study/jdt-before/ui/org/eclipse/jdt/ui/actions/OpenImplementationAction.java
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+/*******************************************************************************
+ * Copyright (c) 2009, 2011 IBM Corporation and others.
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.ui.actions;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.viewers.IStructuredSelection;
+
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextSelection;
+import org.eclipse.jface.text.Region;
+
+import org.eclipse.ui.IWorkbenchSite;
+import org.eclipse.ui.PlatformUI;
+
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IMethod;
+
+import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
+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.javaeditor.JavaEditor;
+import org.eclipse.jdt.internal.ui.javaeditor.JavaElementImplementationHyperlink;
+import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
+
+
+/**
+ * The action allows to open the implementation for a method in its hierarchy.
+ * <p>
+ * The action is applicable to selections containing elements of type <code>
+ * IMethod</code>.
+ * </p>
+ * 
+ * @since 3.6
+ * @noextend This class is not intended to be subclassed by clients.
+ */
+public class OpenImplementationAction extends SelectionDispatchAction {
+
+       /**
+        * The Java editor.
+        */
+       private JavaEditor fEditor;
+
+
+       /**
+        * Creates an <code>OpenImplementationAction</code>.
+        * 
+        * @param site the workbench site
+        */
+       protected OpenImplementationAction(IWorkbenchSite site) {
+               super(site);
+               setText(ActionMessages.OpenImplementationAction_label);
+               setDescription(ActionMessages.OpenImplementationAction_description);
+               setToolTipText(ActionMessages.OpenImplementationAction_tooltip);
+               PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.OPEN_IMPLEMENTATION_ACTION);
+       }
+
+       /**
+        * Creates an <code>OpenImplementationAction</code>. Note: This constructor is for internal use
+        * only. Clients should not call this constructor.
+        * 
+        * @param editor the editor
+        * @noreference This constructor is not intended to be referenced by clients.
+        */
+       public OpenImplementationAction(JavaEditor editor) {
+               this(editor.getEditorSite());
+               fEditor= editor;
+               setEnabled(SelectionConverter.canOperateOn(fEditor) && fEditor.getSelectionProvider().getSelection() instanceof ITextSelection);
+       }
+
+       /*
+        * @see org.eclipse.jdt.ui.actions.SelectionDispatchAction#selectionChanged(org.eclipse.jface.text.ITextSelection)
+        */
+       @Override
+       public void selectionChanged(ITextSelection selection) {
+       }
+
+       /*
+        * @see org.eclipse.jdt.ui.actions.SelectionDispatchAction#selectionChanged(org.eclipse.jface.viewers.IStructuredSelection)
+        */
+       @Override
+       public void selectionChanged(IStructuredSelection selection) {
+               setEnabled(false);
+       }
+
+       /*
+        * @see org.eclipse.jdt.ui.actions.SelectionDispatchAction#run(org.eclipse.jface.text.ITextSelection)
+        */
+       @Override
+       public void run(ITextSelection selection) {
+               if (!ActionUtil.isProcessable(fEditor))
+                       return;
+               IJavaElement element= null;
+               try {
+                       IJavaElement[] elements= SelectionConverter.codeResolveForked(fEditor, true);
+                       if (elements.length == 1)
+                               element= elements[0];
+               } catch (InvocationTargetException e) {
+                       ExceptionHandler.handle(e, getShell(), getDialogTitle(), ActionMessages.OpenAction_error_message);
+                       return;
+               } catch (InterruptedException e) {
+                       return;
+               }
+
+               if (element == null || !(element instanceof IMethod)) {
+                       MessageDialog.openInformation(getShell(), getDialogTitle(), ActionMessages.OpenImplementationAction_not_applicable);
+                       return;
+               }
+               if (!ActionUtil.isProcessable(getShell(), element))
+                       return;
+               SelectionDispatchAction openAction= (SelectionDispatchAction)fEditor.getAction("OpenEditor"); //$NON-NLS-1$
+               if (openAction == null)
+                       return;
+
+               IRegion region= new Region(selection.getOffset(), 0);
+               JavaElementImplementationHyperlink.openImplementations(fEditor, region, (IMethod)element, openAction);
+
+       }
+
+       /**
+        * Returns the dialog title.
+        * 
+        * @return the dialog title
+        */
+       private String getDialogTitle() {
+               return ActionMessages.OpenImplementationAction_error_title;
+       }
+}