Bug 127861 [DataBinding] Mark API provisional
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/validator/ReadOnlyValidator.java
private static ReadOnlyValidator singleton = null;
    
    /**
     * Returns the ReadOnlyValidator
     * 
     * @return the ReadOnlyValidator
     */
    public static ReadOnlyValidator getDefault() {
        if (singleton == null) {
            singleton = new ReadOnlyValidator();
        }
        return singleton;
    }
	/* (non-Javadoc)
	 * @see org.eclipse.jface.databinding.validator.IValidator#isPartiallyValid(java.lang.Object)
	 */
	public String isPartiallyValid(Object fragment) {
		
		return BindingMessages.getString("Validate_NoChangeAllowed"); 
	}
    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ICellEditorValidator#isValid(java.lang.Object)
     */
    public String isValid(Object value) {
        
        return null;
    }
}