debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/modules/ModuleContentProvider.java

/*******************************************************************************
 * Copyright (c) 2007, 2015 ARM and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 * ARM - Initial API and implementation
 * Wind River Systems - adapted to work with platform Modules view (bug 210558)
 *******************************************************************************/
package org.eclipse.cdt.debug.internal.ui.views.modules;

import org.eclipse.cdt.core.model.CModelException;
import org.eclipse.cdt.core.model.IBinary;
import org.eclipse.cdt.core.model.IParent;
import org.eclipse.cdt.debug.core.model.ICModule;
import org.eclipse.cdt.debug.core.model.ICStackFrame;
import org.eclipse.cdt.debug.core.model.ICThread;
import org.eclipse.cdt.debug.core.model.IModuleRetrieval;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.internal.ui.model.elements.ElementContentProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
import org.eclipse.debug.ui.IDebugUIConstants;

public class ModuleContentProvider extends ElementContentProvider {

	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.ui.model.elements.ElementContentProvider#getChildCount(java.lang.Object, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate)
	 */
	@Override
	protected int getChildCount(Object element, IPresentationContext context, IViewerUpdate monitor)
			throws CoreException {
		return getAllChildren(element, context).length;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.ui.model.elements.ElementContentProvider#getChildren(java.lang.Object, int, int, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate)
	 */
	@Override
	protected Object[] getChildren(Object parent, int index, int length, IPresentationContext context,
			IViewerUpdate monitor) throws CoreException {
		return getElements(getAllChildren(parent, context), index, length);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.ui.model.elements.ElementContentProvider#supportsContextId(java.lang.String)
	 */
	@Override
	protected boolean supportsContextId(String id) {
		return IDebugUIConstants.ID_MODULE_VIEW.equals(id);
	}

	protected Object[] getAllChildren(Object parent, IPresentationContext context) throws CoreException {
		if (parent instanceof IModuleRetrieval) {
			return ((IModuleRetrieval) parent).getModules();
		} else if (parent instanceof ICThread || parent instanceof ICStackFrame) {
			IModuleRetrieval mr = ((IAdaptable) parent).getAdapter(IModuleRetrieval.class);
			if (mr != null) {
				return mr.getModules();
			}
		} else if (parent instanceof ICModule) {
			IBinary binary = ((ICModule) parent).getAdapter(IBinary.class);
			if (binary != null) {
				try {
					return binary.getChildren();
				} catch (CModelException e) {
				}
			}
		} else if (parent instanceof IParent) {
			try {
				return ((IParent) parent).getChildren();
			} catch (CModelException e) {
			}
		}
		return EMPTY;
	}
}