org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/launchConfigurations/LaunchGroupFilter.java

package org.eclipse.debug.internal.ui.launchConfigurations;

/**********************************************************************
Copyright (c) 2002 IBM Corp. and others. All rights reserved.
This file is made available under the terms of the Common Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v10.html
 
Contributors:
**********************************************************************/

import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.ILaunchConfigurationType;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;

/**
 * Displays launch configurations for a specific launch group
 */
public class LaunchGroupFilter extends ViewerFilter {
	
	private LaunchGroupExtension fGroup;

	/**
	 * Constructor for ExternalToolsLaunchConfigurationFilter.
	 */
	public LaunchGroupFilter(LaunchGroupExtension groupExtension) {
		super();
		fGroup = groupExtension;
	}

	/**
	 * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	public boolean select(
		Viewer viewer,
		Object parentElement,
		Object element) {
			ILaunchConfigurationType type = null;
			ILaunchConfiguration config = null;
			if (parentElement instanceof ILaunchConfigurationType) {
				type = (ILaunchConfigurationType)parentElement;
			}
			if (element instanceof ILaunchConfigurationType) {
				type = (ILaunchConfigurationType)element;
			}
			if (element instanceof ILaunchConfiguration) {
				config = (ILaunchConfiguration)element;
				try {
					type = config.getType();
				} catch (CoreException e) {
				}
			}
			boolean priv = false;
			if (config != null) {
				try {
					priv = config.getAttribute(IDebugUIConstants.ATTR_PRIVATE, false);
				} catch (CoreException e) {
				}
			}
			if (type != null) {
				return !priv && type.supportsMode(fGroup.getMode()) && equalCategories(type.getCategory(), fGroup.getCategory());
			}
			return false;
	}
	
	/**
	 * Returns whether the given categories are equal.
	 * 
	 * @param c1 category identifier or <code>null</code>
	 * @param c2 category identifier or <code>null</code>
	 * @return boolean
	 */
	private boolean equalCategories(String c1, String c2) {
		if (c1 == null || c2 == null) {
			return c1 == c2;
		}
		return c1.equals(c2);
	} 

}