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; 28 29 import gov.nist.secauto.metaschema.core.metapath.item.ItemUtils; 30 import gov.nist.secauto.metaschema.core.metapath.item.node.INodeItem; 31 import gov.nist.secauto.metaschema.core.util.CollectionUtil; 32 import gov.nist.secauto.metaschema.core.util.ObjectUtils; 33 34 import java.util.List; 35 36 class RootSlashOnlyPath 37 extends AbstractPathExpression<INodeItem> { 38 39 protected RootSlashOnlyPath() { 40 // reduce visibility 41 } 42 43 @Override 44 public List<? extends IExpression> getChildren() { 45 return CollectionUtil.emptyList(); 46 } 47 48 @Override 49 public Class<INodeItem> getBaseResultType() { 50 return INodeItem.class; 51 } 52 53 @Override 54 public <RESULT, CONTEXT> RESULT accept(IExpressionVisitor<RESULT, CONTEXT> visitor, CONTEXT context) { 55 return visitor.visitRootSlashOnlyPath(this, context); 56 } 57 58 @Override 59 public ISequence<? extends INodeItem> accept( 60 DynamicContext dynamicContext, 61 ISequence<?> focus) { 62 63 return ObjectUtils.notNull(focus.asStream() 64 .map(item -> ItemUtils.checkItemIsNodeItemForStep(item)) 65 .map(item -> Axis.ANCESTOR_OR_SELF.execute(ObjectUtils.notNull(item)).findFirst().get()) 66 .collect(ISequence.toSequence())); 67 } 68 }