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
JavaPlugin.log(e);
		}
		return ""; 
	}	
	
	public static IClasspathEntry[] decodeJRELibraryClasspathEntries(String encoded) {
		StringTokenizer tok= new StringTokenizer(encoded, " "); 
		ArrayList res= new ArrayList();
		while (tok.hasMoreTokens()) {
			try {
				tok.nextToken(); 
				int kind= Integer.parseInt(tok.nextToken());
				IPath path= decodePath(tok.nextToken());
				IPath attachPath= decodePath(tok.nextToken());
				IPath attachRoot= decodePath(tok.nextToken());
				boolean isExported= Boolean.valueOf(tok.nextToken()).booleanValue();
				switch (kind) {
					case IClasspathEntry.CPE_SOURCE:
						res.add(JavaCore.newSourceEntry(path));
						break;
					case IClasspathEntry.CPE_LIBRARY:
						res.add(JavaCore.newLibraryEntry(path, attachPath, attachRoot, isExported));
						break;
					case IClasspathEntry.CPE_VARIABLE:
						res.add(JavaCore.newVariableEntry(path, attachPath, attachRoot, isExported));
						break;
					case IClasspathEntry.CPE_PROJECT:
						res.add(JavaCore.newProjectEntry(path, isExported));
						break;
					case IClasspathEntry.CPE_CONTAINER: