ext.org.eclipse.jdt.internal.ui.refactoring.actions.MoveStaticMembersAction.java Source code

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Here is the source code for ext.org.eclipse.jdt.internal.ui.refactoring.actions.MoveStaticMembersAction.java

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/*******************************************************************************
 * Copyright (c) 2000, 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 ext.org.eclipse.jdt.internal.ui.refactoring.actions;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import org.eclipse.jface.dialogs.MessageDialog;
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.IJavaElement;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.JavaModelException;
import patch.org.eclipse.jdt.ui.actions.SelectionDispatchAction;

import patch.org.eclipse.jdt.internal.ui.JavaPlugin;

import ext.org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester;
import ext.org.eclipse.jdt.internal.corext.refactoring.RefactoringExecutionStarter;
import ext.org.eclipse.jdt.internal.corext.util.JavaModelUtil;
import ext.org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import ext.org.eclipse.jdt.internal.ui.actions.ActionUtil;
import ext.org.eclipse.jdt.internal.ui.actions.SelectionConverter;
import ext.org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
import ext.org.eclipse.jdt.internal.ui.javaeditor.JavaTextSelection;
import ext.org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages;
import ext.org.eclipse.jdt.internal.ui.util.ExceptionHandler;

public class MoveStaticMembersAction extends SelectionDispatchAction {

    private JavaEditor fEditor;

    public MoveStaticMembersAction(IWorkbenchSite site) {
        super(site);
        setText(RefactoringMessages.RefactoringGroup_move_label);
        PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.MOVE_ACTION);
    }

    public MoveStaticMembersAction(JavaEditor editor) {
        this(editor.getEditorSite());
        fEditor = editor;
        setEnabled(SelectionConverter.canOperateOn(fEditor));
    }

    @Override
    public void selectionChanged(IStructuredSelection selection) {
        try {
            setEnabled(RefactoringAvailabilityTester.isMoveStaticMembersAvailable(getSelectedMembers(selection)));
        } catch (JavaModelException e) {
            // http://bugs.eclipse.org/bugs/show_bug.cgi?id=19253
            if (JavaModelUtil.isExceptionToBeLogged(e))
                JavaPlugin.log(e);
            setEnabled(false);//no ui
        }
    }

    @Override
    public void selectionChanged(ITextSelection selection) {
        setEnabled(true);
    }

    /**
     * Note: This method is for internal use only. Clients should not call this method.
     */
    @Override
    public void selectionChanged(JavaTextSelection selection) {
        try {
            setEnabled(RefactoringAvailabilityTester.isMoveStaticAvailable(selection));
        } catch (JavaModelException e) {
            setEnabled(false);
        }
    }

    @Override
    public void run(IStructuredSelection selection) {
        try {
            IMember[] members = getSelectedMembers(selection);
            for (int index = 0; index < members.length; index++) {
                if (!ActionUtil.isEditable(getShell(), members[index]))
                    return;
            }
            if (RefactoringAvailabilityTester.isMoveStaticMembersAvailable(members))
                RefactoringExecutionStarter.startMoveStaticMembersRefactoring(members, getShell());
        } catch (JavaModelException e) {
            ExceptionHandler.handle(e, RefactoringMessages.OpenRefactoringWizardAction_refactoring,
                    RefactoringMessages.OpenRefactoringWizardAction_exception);
        }
    }

    @Override
    public void run(ITextSelection selection) {
        try {
            IMember member = getSelectedMemberFromEditor();
            if (!ActionUtil.isEditable(fEditor, getShell(), member))
                return;
            IMember[] array = new IMember[] { member };
            if (member != null && RefactoringAvailabilityTester.isMoveStaticMembersAvailable(array)) {
                RefactoringExecutionStarter.startMoveStaticMembersRefactoring(array, getShell());
            } else {
                MessageDialog.openInformation(getShell(),
                        RefactoringMessages.OpenRefactoringWizardAction_unavailable,
                        RefactoringMessages.MoveMembersAction_unavailable);
            }
        } catch (JavaModelException e) {
            ExceptionHandler.handle(e, RefactoringMessages.OpenRefactoringWizardAction_refactoring,
                    RefactoringMessages.OpenRefactoringWizardAction_exception);
        }
    }

    private static IMember[] getSelectedMembers(IStructuredSelection selection) {
        if (selection.isEmpty())
            return null;

        for (final Iterator<?> iterator = selection.iterator(); iterator.hasNext();) {
            if (!(iterator.next() instanceof IMember))
                return null;
        }
        Set<IMember> memberSet = new HashSet<IMember>();
        @SuppressWarnings("unchecked")
        List<IMember> selectionList = (List<IMember>) (List<?>) Arrays.asList(selection.toArray());
        memberSet.addAll(selectionList);
        return memberSet.toArray(new IMember[memberSet.size()]);
    }

    private IMember getSelectedMemberFromEditor() throws JavaModelException {
        IJavaElement element = SelectionConverter.getElementAtOffset(fEditor);
        if (element == null || !(element instanceof IMember))
            return null;
        return (IMember) element;
    }
}