com.svcdelivery.liquibase.eclipse.internal.ui.RollbackCommandHandler.java Source code

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Here is the source code for com.svcdelivery.liquibase.eclipse.internal.ui.RollbackCommandHandler.java

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/**
 * Copyright 2012 Nick Wilson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.svcdelivery.liquibase.eclipse.internal.ui;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.IHandlerListener;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * @author nick
 */
public class RollbackCommandHandler extends Action implements IHandler {

    /**
     * The current shell.
     */
    private Shell shell;
    /**
     * The current selection.
     */
    private ISelection selection;

    /**
     * Default constructor.
     */
    public RollbackCommandHandler() {
    }

    /**
     * @param currentShell
     *            The current shell.
     * @param currentSelection
     *            The current selection.
     */
    public RollbackCommandHandler(final Shell currentShell, final ISelection currentSelection) {
        shell = currentShell;
        selection = currentSelection;
        setText("Rollback Script");
    }

    @Override
    public void addHandlerListener(final IHandlerListener handlerListener) {
    }

    @Override
    public void dispose() {
    }

    @Override
    public final Object execute(final ExecutionEvent event) throws ExecutionException {
        selection = HandlerUtil.getCurrentSelection(event);
        shell = HandlerUtil.getActiveShell(event);
        IFile file = null;
        if (selection instanceof StructuredSelection) {
            final StructuredSelection structured = (StructuredSelection) selection;
            if (structured.size() == 1) {
                file = (IFile) structured.getFirstElement();
            }
        }
        IWizard targetWizard = new RollbackScriptsWizard(file);
        showWizard(targetWizard);
        return null;
    }

    @Override
    public final void run() {
        ChangeSetTreeItem item = null;
        if (selection instanceof StructuredSelection) {
            final StructuredSelection structured = (StructuredSelection) selection;
            if (structured.size() == 1)
                item = (ChangeSetTreeItem) structured.getFirstElement();
        }
        IWizard targetWizard = new RollbackChangeSetWizard(item);
        showWizard(targetWizard);
    }

    /**
     * @param targetWizard
     *            The wizard to show.
     */
    private void showWizard(final IWizard targetWizard) {
        WizardDialog dialog = new WizardDialog(shell, targetWizard);
        dialog.setPageSize(600, 500);
        dialog.open();
    }

    @Override
    public final boolean isEnabled() {
        return true;
    }

    @Override
    public final boolean isHandled() {
        return true;
    }

    @Override
    public void removeHandlerListener(final IHandlerListener handlerListener) {
    }

}