plugins/org.eclipse.epp.installer.core.linux/src/org/eclipse/epp/installer/internal/linux/core/RemoveRegistryKeyAction.java

package org.eclipse.epp.installer.internal.linux.core;

import java.text.MessageFormat;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.epp.installer.core.IErrorConstants;
import org.eclipse.epp.installer.core.Linux;
import org.eclipse.epp.installer.core.model.IRollbackAction;
import org.eclipse.epp.installer.internal.core.InstallLogEntry;
import org.eclipse.epp.installer.internal.linux.core.Markers.MarkerKey;


public class RemoveRegistryKeyAction implements IRollbackAction {

	public IStatus rollback(InstallLogEntry entry) {
		String arg = entry.getArgument();

		if( !Markers.checkWriteRootPermissions(arg) ) {			
			return new MarkersComparableWarning(arg, IStatus.WARNING,
					Linux.PLUGIN_ID, 0, "Failed to access Markers registry at:"
							+ arg, null);
		}
		MarkerKey[] subKeys = Markers.openKeys( arg );
		if (subKeys == null) {
			return new Status(IStatus.INFO, Linux.PLUGIN_ID,
					IErrorConstants.ERROR_REGISTRY_ERROR, "Registry error",
					null);
		}
		if (subKeys.length == 0)
			if( !Markers.removeKey( arg ) ) {
				return new Status(IStatus.INFO, Linux.PLUGIN_ID,
						IErrorConstants.ERROR_REGISTRY_ERROR, "Registry error",
						null);
			}
		return Status.OK_STATUS;
	}

	public String getDescription(InstallLogEntry entry) {
		return MessageFormat.format("Removing registry value: {0}",
				new Object[] { entry.getArgument() });
	}
}