Bug 208055 [Markers] Need a sorting method for the markers view
As there is currently no accessible way to change sort order or direction. A menu should be enough.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.core.runtime.IAdapterFactory#getAdapterList()
			 */
			public Class[] getAdapterList() {
				return new Class[] { IMarker.class };
			}
		}, MarkerEntry.class);
	}
	/**
	 * MarkerSelectionEntry is a cache of the values for a marker entry.
	 * 
	 * @since 3.4
	 * 
	 */
	final class MarkerSelectionEntry {
		Object[] cachedValues;
		MarkerSelectionEntry(MarkerItem item) {
			MarkerField[] fields = builder.getGenerator().getVisibleFields();
			cachedValues = new Object[fields.length];
			for (int i = 0; i < fields.length; i++) {
				cachedValues[i] = fields[i].getValue(item);
			}
		}
		/**
		 * Return whether or not the entry is equivalent to the cached state.
		 * 
		 * @param item
		 * @return boolean <code>true</code> if they are equivalent