public static boolean findBooleanExtension(Element c, String uri) {
Extension ex = c.getExtension(uri);
if (ex == null) return false;
if (!(ex.getValue() instanceof Boolean)) return false;
return true;
}
public static boolean findStringExtension(Element c, String uri) {
Extension ex = c.getExtension(uri);
if (ex == null) return false;
if (!(ex.getValue() instanceof String_)) return false;
return !Utilities.noString(((String_) ex.getValue()).getValue());
}
public static String readBooleanExtension(Element c, String uri) {
Extension ex = c.getExtension(uri);
if (ex == null) return null;
if (!(ex.getValue() instanceof Boolean)) return null;
return java.lang.Boolean.toString(((Boolean) ex.getValue()).getValue());
}
public static String readStringExtension(Element c, String uri) {
Extension ex = c.getExtension(uri);
if (ex == null) return null;
if (!(ex.getValue() instanceof String_)) return null;
return ((String_) ex.getValue()).getValue();
}