be.ac.vub.uml2cs.instantmessenger.presentation.LiveValidationContentAdapter.java Source code

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Here is the source code for be.ac.vub.uml2cs.instantmessenger.presentation.LiveValidationContentAdapter.java

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/**
 * <copyright>
 *
 * Copyright (c) 2005, 2007 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 - Initial API and implementation
 *
 * </copyright>
 *
 * $Id$
 */

package be.ac.vub.uml2cs.instantmessenger.presentation;

import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.util.EContentAdapter;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.validation.model.EvaluationMode;
import org.eclipse.emf.validation.service.ILiveValidator;
import org.eclipse.emf.validation.service.ModelValidationService;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.PlatformUI;

/**
 * A content adapter that performs live validation in response to changes in
 * the model.
 */
class LiveValidationContentAdapter extends EContentAdapter {
    private ILiveValidator validator = null;
    private EditingDomain editingDomain = null;

    public LiveValidationContentAdapter(EditingDomain editingDomain) {
        super();
        Assert.isNotNull(editingDomain);
        this.editingDomain = editingDomain;
    }

    /* (non-Javadoc)
     * @see org.eclipse.emf.ecore.util.EContentAdapter#notifyChanged(org.eclipse.emf.common.notify.Notification)
     */
    public void notifyChanged(final Notification notification) {
        super.notifyChanged(notification);

        PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
            public void run() {
                if (validator == null) {
                    validator = (ILiveValidator) ModelValidationService.getInstance()
                            .newValidator(EvaluationMode.LIVE);
                }

                IStatus status = validator.validate(notification);

                if (!status.isOK()) {
                    if (status.isMultiStatus()) {
                        status = status.getChildren()[0];
                    }

                    MessageDialog.openError(InstantMessengerEditorPlugin.INSTANCE.getShell(),
                            "Live Validation Error", status.getMessage());

                    editingDomain.getCommandStack().undo();
                }
            }
        });
    }
}