ac.soton.multisim.ui.commands.ValidateCommandHandler.java Source code

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Here is the source code for ac.soton.multisim.ui.commands.ValidateCommandHandler.java

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/**
 * Copyright (c) 2014 University of Southampton.
 * 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
 */
package ac.soton.multisim.ui.commands;

import java.util.List;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramWorkbenchPart;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.handlers.HandlerUtil;

import ac.soton.multisim.diagram.part.MultisimDiagramEditorPlugin;
import ac.soton.multisim.diagram.part.ValidateAction;
import ac.soton.multisim.util.SimulationStatus;

/**
 * Command handler for validating the diagram.
 * 
 * @author vitaly
 *
 */
public class ValidateCommandHandler extends AbstractHandler {

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        IEditorPart diagramEditor = HandlerUtil.getActiveEditorChecked(event);

        // reuse GMF-generated validate action from the diagram
        Action validateAction = new ValidateAction(diagramEditor.getSite().getPage());
        validateAction.run();

        // show validation results
        IFile file = WorkspaceSynchronizer
                .getFile(((IDiagramWorkbenchPart) diagramEditor).getDiagram().eResource());
        List<IMarker> markers = null;
        try {
            markers = ValidateAction.getErrorMarkers(file);
        } catch (CoreException e) {
            throw new ExecutionException("Validation result retrieval failed", e);
        }
        if (markers.isEmpty()) {
            MessageDialog.openInformation(diagramEditor.getSite().getShell(), "Validation Information",
                    "Validation completed successfully");
        } else {
            final String PID = MultisimDiagramEditorPlugin.ID;
            MultiStatus errors = new MultiStatus(PID, 1, "Diagram constraints violated", null);
            for (IMarker marker : markers) {
                errors.add(
                        SimulationStatus.createErrorStatus(marker.getAttribute(IMarker.MESSAGE, "unknown error")));
            }
            ErrorDialog.openError(diagramEditor.getSite().getShell(), "Validation Problems",
                    "Problems found during validation", errors);
        }

        return null;
    }

}