1 /*
2 * Portions of this software was developed by employees of the National Institute
3 * of Standards and Technology (NIST), an agency of the Federal Government and is
4 * being made available as a public service. Pursuant to title 17 United States
5 * Code Section 105, works of NIST employees are not subject to copyright
6 * protection in the United States. This software may be subject to foreign
7 * copyright. Permission in the United States and in foreign countries, to the
8 * extent that NIST may hold copyright, to use, copy, modify, create derivative
9 * works, and distribute this software and its documentation without fee is hereby
10 * granted on a non-exclusive basis, provided that this notice and disclaimer
11 * of warranty appears in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
14 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
15 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
17 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
18 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
19 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
20 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
21 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
22 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
23 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
24 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
25 */
26
27 package gov.nist.secauto.metaschema.core.metapath.item;
28
29 import gov.nist.secauto.metaschema.core.metapath.TypeMetapathException;
30 import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem;
31
32 import edu.umd.cs.findbugs.annotations.NonNull;
33 import edu.umd.cs.findbugs.annotations.Nullable;
34
35 public final class ItemUtils {
36
37 private ItemUtils() {
38 // disable construction
39 }
40
41 @NonNull
42 public static INodeItem checkItemIsNodeItemForStep(@Nullable IItem item) {
43 if (item instanceof INodeItem) {
44 return (INodeItem) item;
45 }
46 if (item == null) {
47 throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP,
48 "Item is null.");
49 }
50 throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP,
51 String.format(
52 "The item of type '%s' is not a INodeItem.",
53 item.getClass().getName()));
54 }
55
56 @SuppressWarnings("unchecked")
57 @NonNull
58 public static <TYPE> TYPE checkItemType(@NonNull IItem item, @NonNull Class<TYPE> clazz) {
59 if (clazz.isInstance(item)) {
60 return (TYPE) item;
61 }
62 throw new TypeMetapathException(TypeMetapathException.INVALID_TYPE_ERROR,
63 String.format(
64 "The item of type '%s' is not the required type '%s'.",
65 item.getClass().getName(),
66 clazz.getName()));
67 }
68 }