org.eclipse.jst.jsp.ui.internal.java.refactoring.RenameElementHandler.java Source code

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Here is the source code for org.eclipse.jst.jsp.ui.internal.java.refactoring.RenameElementHandler.java

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/*******************************************************************************
 * Copyright (c) 2008, 2010 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.jst.jsp.ui.internal.java.refactoring;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IField;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.ui.refactoring.RenameSupport;
import org.eclipse.jst.jsp.ui.internal.JSPUIMessages;
import org.eclipse.jst.jsp.ui.internal.Logger;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.sse.ui.internal.util.PlatformStatusLineUtil;

public class RenameElementHandler extends AbstractHandler {
    private IEditorPart fEditor;

    public Object execute(ExecutionEvent event) throws ExecutionException {
        fEditor = HandlerUtil.getActiveEditor(event);

        IJavaElement element = getSelectedElement();
        if (element != null) {
            RenameSupport renameSupport = null;
            try {
                switch (element.getElementType()) {
                case IJavaElement.TYPE:
                    renameSupport = RenameSupport.create((IType) element, element.getElementName(),
                            RenameSupport.UPDATE_REFERENCES);
                    break;
                case IJavaElement.METHOD:
                    renameSupport = RenameSupport.create((IMethod) element, element.getElementName(),
                            RenameSupport.UPDATE_REFERENCES);
                    break;
                case IJavaElement.PACKAGE_FRAGMENT:
                    renameSupport = RenameSupport.create((IPackageFragment) element, element.getElementName(),
                            RenameSupport.UPDATE_REFERENCES);
                    break;
                case IJavaElement.FIELD:
                    renameSupport = RenameSupport.create((IField) element, element.getElementName(),
                            RenameSupport.UPDATE_REFERENCES);
                    break;
                }
                if (renameSupport != null) {
                    renameSupport.openDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell());
                    PlatformStatusLineUtil.clearStatusLine();
                }
            } catch (CoreException e) {
                Logger.logException(e);
            }
        } else {
            PlatformStatusLineUtil.displayErrorMessage(JSPUIMessages.JSPRenameElementAction_0); //$NON-NLS-1$
            PlatformStatusLineUtil.addOneTimeClearListener();
        }

        return null;
    }

    private IJavaElement getSelectedElement() {
        IJavaElement element = null;
        if (fEditor != null) {
            ITextEditor editor = (ITextEditor) ((fEditor instanceof ITextEditor) ? fEditor
                    : fEditor.getAdapter(ITextEditor.class));
            if (editor != null) {
                IJavaElement[] elements = JSPJavaSelectionProvider.getSelection(editor);
                if (elements.length == 1)
                    element = elements[0];
            }
        }
        return element;
    }

}