/**

	 * Returns the scheduling rule that is required for building 

	 * the project for which this builder is defined. The default 

	 * is {@link #getRule()}.

	 * <p>

	 * The scheduling rule determines which resources in the workspace are 

	 * protected from being modified by other threads while the builder is running. Up until

	 * Eclipse 3.5, the entire workspace was always locked during a build;

	 * since Eclipse 3.6, builders can allow resources outside their scheduling

	 * rule to be modified.

	 * <p>

	 * <strong>Notes:</strong>

	 * <ul>

	 * <li>

	 * If the builder rule is non-<code>null</code> it must be "contained" in the workspace root rule.

	 * I.e. {@link ISchedulingRule#contains(ISchedulingRule)} must return 

	 * <code>true</code> when invoked on the workspace root with the builder rule.

	 * </li>

	 * <li>

	 * The rule returned here may have no effect if the build is invoked within the 

	 * scope of another operation that locks the entire workspace.

     * </li>

     * <li>

	 * If this method returns any rule other than the workspace root,

	 * resources outside of the rule scope can be modified concurrently with the build. 

	 * The delta returned by {@link #getDelta(IProject)} for any project

	 * outside the scope of the builder's rule will not contain changes that occurred 

	 * concurrently with the build.

	 * </ul>

	 * </p>

	 * 

	 * @param trigger the type of build being triggered. Valid values are

	 * <ul>

	 * <li>{@link #FULL_BUILD} - indicates a full build.</li>

	 * <li>{@link #INCREMENTAL_BUILD}- indicates an incremental build.</li>

	 * <li>{@link #AUTO_BUILD} - indicates an automatically triggered

	 * incremental build (autobuilding on).</li>

	 * <li>{@link #CLEAN_BUILD} - indicates a clean build

	 * </ul>

	 * This may be different {@link #build(int, Map, IProgressMonitor)} kind.

	 * @param args a table of builder-specific arguments keyed by argument name

	 * (key type: <code>String</code>, value type: <code>String</code>);

	 * <code>null</code> is equivalent to an empty map

	 * @return a scheduling rule which is contained in the workspace root rule or <code>null</code>

	 * 

	 * @since 3.6

	 */

	public ISchedulingRule getRule(int trigger, Map args) {

		return getRule();

	}