Bug 5231 Add search for field read and write references
The UI should support the following new JDT Core feature: Search for field read and field write references. Two new constants have been added on IJavaSearchConstants to be used when creating a field reference search pattern: - READ_REFERENCES: the search results contain *only* read access to a field. - WRITE_REFERENCES: the search results contain *only* write access to a field. If REFERENCES is used, then search results contain both read and write accesss to a field.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/JavaSearchPage.java
int				searchFor;
		int				limitTo;
		String			pattern;
		IJavaElement	javaElement;
		int				scope;
		IWorkingSet	 	workingSet;
		
		public SearchPatternData(int s, int l, String p, IJavaElement element) {
			this(s, l, p, element, ISearchPageContainer.WORKSPACE_SCOPE, null);
		}
		
		public SearchPatternData(int s, int l, String p, IJavaElement element, int scope, IWorkingSet workingSet) {
			searchFor= s;
			limitTo= l;
			pattern= p;