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.function.library; 028 029import gov.nist.secauto.metaschema.core.metapath.DynamicContext; 030import gov.nist.secauto.metaschema.core.metapath.ISequence; 031import gov.nist.secauto.metaschema.core.metapath.MetapathConstants; 032import gov.nist.secauto.metaschema.core.metapath.function.FunctionUtils; 033import gov.nist.secauto.metaschema.core.metapath.function.IArgument; 034import gov.nist.secauto.metaschema.core.metapath.function.IFunction; 035import gov.nist.secauto.metaschema.core.metapath.item.IItem; 036import gov.nist.secauto.metaschema.core.metapath.item.atomic.IIntegerItem; 037import gov.nist.secauto.metaschema.core.metapath.item.atomic.INumericItem; 038import gov.nist.secauto.metaschema.core.util.ObjectUtils; 039 040import java.util.List; 041 042import edu.umd.cs.findbugs.annotations.NonNull; 043 044public final class FnRound { 045 private static final String NAME = "round"; 046 047 @NonNull 048 static final IFunction SIGNATURE = NumericFunction.signature( 049 MetapathConstants.NS_XPATH_FUNCTIONS, 050 NAME, 051 INumericItem::round); 052 053 @NonNull 054 static final IFunction SIGNATURE_WITH_PRECISION = IFunction.builder() 055 .name(NAME) 056 .namespace(MetapathConstants.NS_XPATH_FUNCTIONS) 057 .argument(IArgument.newBuilder() 058 .name("arg1") 059 .type(INumericItem.class) 060 .zeroOrOne() 061 .build()) 062 .argument(IArgument.newBuilder() 063 .name("precision") 064 .type(IIntegerItem.class) 065 .one() 066 .build()) 067 .returnType(INumericItem.class) 068 .returnZeroOrOne() 069 .functionHandler(FnRound::executeTwoArg) 070 .build(); 071 072 private FnRound() { 073 // disable construction 074 } 075 076 @SuppressWarnings("unused") 077 @NonNull 078 private static ISequence<INumericItem> executeTwoArg( 079 @NonNull IFunction function, 080 @NonNull List<ISequence<?>> arguments, 081 @NonNull DynamicContext dynamicContext, 082 IItem focus) { 083 ISequence<? extends INumericItem> sequence = FunctionUtils.asType( 084 ObjectUtils.requireNonNull(arguments.get(0))); 085 if (sequence.isEmpty()) { 086 return ISequence.empty(); // NOPMD - readability 087 } 088 089 INumericItem item = FunctionUtils.getFirstItem(sequence, true); 090 if (item == null) { 091 return ISequence.empty(); // NOPMD - readability 092 } 093 094 @NonNull IIntegerItem precision = FunctionUtils.asType( 095 FunctionUtils.requireFirstItem( 096 ObjectUtils.requireNonNull(arguments.get(1)), 097 true)); 098 099 INumericItem result = item.round(precision); 100 return ISequence.of(result); 101 } 102}