ItemUtils.java
/*
* Portions of this software was developed by employees of the National Institute
* of Standards and Technology (NIST), an agency of the Federal Government and is
* being made available as a public service. Pursuant to title 17 United States
* Code Section 105, works of NIST employees are not subject to copyright
* protection in the United States. This software may be subject to foreign
* copyright. Permission in the United States and in foreign countries, to the
* extent that NIST may hold copyright, to use, copy, modify, create derivative
* works, and distribute this software and its documentation without fee is hereby
* granted on a non-exclusive basis, provided that this notice and disclaimer
* of warranty appears in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
* EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
* THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
* INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
* SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
* SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
* INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
* OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
* CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
* OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
*/
package gov.nist.secauto.metaschema.core.metapath.item;
import gov.nist.secauto.metaschema.core.metapath.TypeMetapathException;
import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
public final class ItemUtils {
private ItemUtils() {
// disable construction
}
@NonNull
public static INodeItem checkItemIsNodeItemForStep(@Nullable IItem item) {
if (item instanceof INodeItem) {
return (INodeItem) item;
}
if (item == null) {
throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP,
"Item is null.");
}
throw new TypeMetapathException(TypeMetapathException.NOT_A_NODE_ITEM_FOR_STEP,
String.format(
"The item of type '%s' is not a INodeItem.",
item.getClass().getName()));
}
@SuppressWarnings("unchecked")
@NonNull
public static <TYPE> TYPE checkItemType(@NonNull IItem item, @NonNull Class<TYPE> clazz) {
if (clazz.isInstance(item)) {
return (TYPE) item;
}
throw new TypeMetapathException(TypeMetapathException.INVALID_TYPE_ERROR,
String.format(
"The item of type '%s' is not the required type '%s'.",
item.getClass().getName(),
clazz.getName()));
}
}