import java.util.Arrays;
import java.util.Base64;
import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
import java.util.UUID;
import javax.xml.namespace.QName;
/**
* Minimal standard attribute types that MUST be supported. All related classes
* belong to java.base and can be implicitly derived form a given
- * <code>String<code>.
+ * <code>String</code>.
*/
public enum CrAttributeType {
BOOLEAN(Boolean.class, W3C_XML_SCHEMA_NS_URI, "boolean", new BooleanFormatter()), //
return STRING.getFormatter().parse(str);
}
+ /**
+ * Cast well know java types based on {@link Object#toString()} of the provided
+ * object.
+ *
+ */
+ @SuppressWarnings("unchecked")
+ public static <T> Optional<T> cast(Class<T> clss, Object value) {
+ // TODO Or should we?
+ Objects.requireNonNull(value, "Cannot cast a null value");
+ if (String.class.isAssignableFrom(clss)) {
+ return Optional.of((T) value.toString());
+ }
+ // Numbers
+ else if (Long.class.isAssignableFrom(clss)) {
+ if (value instanceof Long)
+ return Optional.of((T) value);
+ return Optional.of((T) Long.valueOf(value.toString()));
+ } else if (Integer.class.isAssignableFrom(clss)) {
+ if (value instanceof Integer)
+ return Optional.of((T) value);
+ return Optional.of((T) Integer.valueOf(value.toString()));
+ } else if (Double.class.isAssignableFrom(clss)) {
+ if (value instanceof Double)
+ return Optional.of((T) value);
+ return Optional.of((T) Double.valueOf(value.toString()));
+ }
+ // Numbers
+// else if (Number.class.isAssignableFrom(clss)) {
+// if (value instanceof Number)
+// return Optional.of((T) value);
+// return Optional.of((T) Number.valueOf(value.toString()));
+// }
+ return Optional.empty();
+ }
+
/** Utility to convert a data: URI to bytes. */
public static byte[] bytesFromDataURI(URI uri) {
if (!"data".equals(uri.getScheme()))