com.vectrace.MercurialEclipse.menu.SynchronizeChangesetHandler.java Source code

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Here is the source code for com.vectrace.MercurialEclipse.menu.SynchronizeChangesetHandler.java

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/*******************************************************************************
 * Copyright (c) 2005-2010 VecTrace (Zingo Andersen) 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:
 * Amenel Voglozin   implementation (2016-08-13)
 *******************************************************************************/
package com.vectrace.MercurialEclipse.menu;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.handlers.HandlerUtil;

import com.vectrace.MercurialEclipse.MercurialEclipsePlugin;
import com.vectrace.MercurialEclipse.model.GroupedUncommittedChangeSet;

/**
 * Base class for handlers of Synchronize perspective operations that operate upon local changesets.
 *
 * @author Amenel Voglozin
 *
 */
public abstract class SynchronizeChangesetHandler extends AbstractHandler {
    private GroupedUncommittedChangeSet changeset;
    private Shell shell;

    protected Shell getShell() {
        return shell != null ? shell : MercurialEclipsePlugin.getActiveShell();
    }

    protected GroupedUncommittedChangeSet getSelectedChangeset() {
        return changeset;
    }

    /**
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    public Object execute(ExecutionEvent event) throws ExecutionException {
        changeset = null;

        IStructuredSelection selection = HandlerUtil.getCurrentStructuredSelection(event);
        try {
            if (selection != null && selection.size() == 1) {
                Object selectionObject = selection.toArray()[0];
                if (selectionObject instanceof GroupedUncommittedChangeSet) {
                    changeset = (GroupedUncommittedChangeSet) selectionObject;
                }
            }
            if (changeset == null) {
                // NOP
                return null;
            }
            run(getSelectedChangeset());
        } catch (Exception e) {
            MessageDialog.openError(getShell(), Messages.getString("SingleResourceHandler.hgSays"), //$NON-NLS-1$
                    e.getMessage() + Messages.getString("SingleResourceHandler.seeErrorLog")); //$NON-NLS-1$
            throw new ExecutionException(e.getMessage(), e);
        }
        return null;
    }

    protected abstract void run(GroupedUncommittedChangeSet cs) throws Exception;
}