001/* 002 * Portions of this software was developed by employees of the National Institute 003 * of Standards and Technology (NIST), an agency of the Federal Government and is 004 * being made available as a public service. Pursuant to title 17 United States 005 * Code Section 105, works of NIST employees are not subject to copyright 006 * protection in the United States. This software may be subject to foreign 007 * copyright. Permission in the United States and in foreign countries, to the 008 * extent that NIST may hold copyright, to use, copy, modify, create derivative 009 * works, and distribute this software and its documentation without fee is hereby 010 * granted on a non-exclusive basis, provided that this notice and disclaimer 011 * of warranty appears in all copies. 012 * 013 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER 014 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY 015 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF 016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM 017 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE 018 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT 019 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, 020 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, 021 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, 022 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR 023 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT 024 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER. 025 */ 026 027package gov.nist.secauto.metaschema.core.metapath.item; 028 029import gov.nist.secauto.metaschema.core.metapath.TypeMetapathException; 030import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem; 031 032import edu.umd.cs.findbugs.annotations.NonNull; 033import edu.umd.cs.findbugs.annotations.Nullable; 034 035public final class ItemUtils { 036 037 private ItemUtils() { 038 // disable construction 039 } 040 041 @NonNull 042 public static INodeItem checkItemIsNodeItemForStep(@Nullable IItem item) { 043 if (item instanceof INodeItem) { 044 return (INodeItem) item; 045 } 046 if (item == null) { 047 throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP, 048 "Item is null."); 049 } 050 throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP, 051 String.format( 052 "The item of type '%s' is not a INodeItem.", 053 item.getClass().getName())); 054 } 055 056 @SuppressWarnings("unchecked") 057 @NonNull 058 public static <TYPE> TYPE checkItemType(@NonNull IItem item, @NonNull Class<TYPE> clazz) { 059 if (clazz.isInstance(item)) { 060 return (TYPE) item; 061 } 062 throw new TypeMetapathException(TypeMetapathException.INVALID_TYPE_ERROR, 063 String.format( 064 "The item of type '%s' is not the required type '%s'.", 065 item.getClass().getName(), 066 clazz.getName())); 067 } 068}