FilterAdd.java

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package edu.rice.cs.hpc.filter.action;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.services.ISourceProviderService;

import edu.rice.cs.hpc.data.filter.FilterAttribute;
import edu.rice.cs.hpc.filter.pattern.PatternValidator;
import edu.rice.cs.hpc.filter.service.FilterMap;
import edu.rice.cs.hpc.filter.service.FilterStateProvider;

/**********************************************
 * 
 * Command handler class to add a new filter
 * Currently it only asks for a new pattern with enabled pattern and 
 *  inclusive pattern type by default. 
 * User needs to change the default attributes if needed.
 *
 **********************************************/
public class FilterAdd extends AbstractHandler 
{

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException 
    {
        // Eclipse bug ? we need to keep this statement in the beginning of this routine because
        // HandlerUtil will remove all existing contexts when a new dialog show up
        
        IWorkbenchWindow winObj = HandlerUtil.getActiveWorkbenchWindow(event);

        // show a dialog to retrieve a new pattern
        
        final Shell shell = HandlerUtil.getActiveShell(event);
        final InputDialog dialog = new InputDialog(shell, "Add a pattern", 
                "Use a glob pattern to define a filter. For instance, a MPI* will filter all MPI routines", 
                "", new PatternValidator());
        
        if (dialog.open() == Window.OK)
        {
            // add a new filter with the default attribute
            FilterAttribute attribute = new FilterAttribute();
            final FilterMap filterMap = FilterMap.getInstance();
            filterMap.put(dialog.getValue(), attribute);
            
            // notify changes
            ISourceProviderService sourceProviderService = (ISourceProviderService) winObj.getService(
                    ISourceProviderService.class);

            final FilterStateProvider provider = (FilterStateProvider) sourceProviderService.getSourceProvider(
                    FilterStateProvider.FILTER_REFRESH_PROVIDER);

            provider.refresh();
        }
        return null;
    }
}