Bug 119603 [api][content assist] allow contributions to filter and sort proposals
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaCompletionProcessor.java
* starting with matching cases.
	 *
	 * @param restrict <code>true</code> if proposals should be restricted
	 */
	public void restrictProposalsToMatchingCases(boolean restrict) {
		
	}
	/*
	 * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getContextInformationValidator()
	 */
	public IContextInformationValidator getContextInformationValidator() {
		if (fValidator == null)
			fValidator= new JavaParameterListValidator();
		return fValidator;
	}
	/*
	 * @see org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor#filterAndSort(java.util.List, org.eclipse.core.runtime.IProgressMonitor)
	 */
	protected List filterAndSortProposals(List proposals, IProgressMonitor monitor, ContentAssistInvocationContext context) {
		Collections.sort(proposals, fComparator);
		return proposals;
	}
	/*
	 * @see org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor#createContext(org.eclipse.jface.text.ITextViewer, int)
	 */
	protected ContentAssistInvocationContext createContext(ITextViewer viewer, int offset) {
		return new JavaContentAssistInvocationContext(viewer, offset, fEditor);
	}
}