Bug 63883 Cannot configure option for enabling/disabling exclusion filters or custom output folders on a per project basis
Build M9 JDT/Core supports setting enablement for exclusion patterns and custom output folders on a per project basis. This isn't surfaced in the UI. There is only a global flag in workspace preferences.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/NewJavaProjectPreferencePage.java
if (res.length > 0) {
				return res;
			}
		}
		return new IClasspathEntry[] { getJREContainerEntry() };	
	}			
	
	
	
	public static String decodeJRELibraryDescription(String encoded) {
		int end= encoded.indexOf(' ');
		if (end != -1) {
			return decode(encoded.substring(0, end));
		}
		return ""; 
	}
	
	private static String decode(String str) {
		try {
			return URLDecoder.decode(str, fgDefaultEncoding);
		} catch (UnsupportedEncodingException e) {
			JavaPlugin.log(e);
		}
		return ""; 
	}
	
	private static String encode(String str) {
		try {
			return URLEncoder.encode(str, fgDefaultEncoding);
		} catch (UnsupportedEncodingException e) {