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 }