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.IItem; 30 import gov.nist.secauto.metaschema.core.util.CollectionUtil; 31 import gov.nist.secauto.metaschema.core.util.ObjectUtils; 32 33 import java.util.List; 34 35 import edu.umd.cs.findbugs.annotations.NonNull; 36 37 class VariableReference implements IExpression { 38 @NonNull 39 private final Name name; 40 41 public VariableReference(@NonNull Name name) { 42 this.name = name; 43 } 44 45 @NonNull 46 public Name getName() { 47 return name; 48 } 49 50 @Override 51 public List<? extends IExpression> getChildren() { 52 return CollectionUtil.emptyList(); 53 } 54 55 @SuppressWarnings("null") 56 @Override 57 public String toASTString() { 58 return String.format("%s[name=%s]", getClass().getName(), getName().getValue()); 59 } 60 61 @Override 62 public <RESULT, CONTEXT> RESULT accept(IExpressionVisitor<RESULT, CONTEXT> visitor, CONTEXT context) { 63 return visitor.visitVariableReference(this, context); 64 } 65 66 @Override 67 public ISequence<? extends IItem> accept(DynamicContext dynamicContext, ISequence<?> focus) { 68 return dynamicContext.getVariableValue(ObjectUtils.notNull(getName().getValue())); 69 } 70 71 }