Github user jdasch commented on a diff in the pull request: https://github.com/apache/incubator-rya/pull/237#discussion_r143750533 --- Diff: common/rya.api/src/main/java/org/apache/rya/api/functions/DateTimeWithinPeriod.java --- @@ -0,0 +1,130 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */package org.apache.rya.api.functions; + +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkNotNull; + +import java.time.Duration; +import java.time.Instant; + +import org.openrdf.model.Literal; +import org.openrdf.model.URI; +import org.openrdf.model.Value; +import org.openrdf.model.ValueFactory; +import org.openrdf.model.datatypes.XMLDatatypeUtil; +import org.openrdf.model.vocabulary.FN; +import org.openrdf.model.vocabulary.XMLSchema; +import org.openrdf.query.algebra.evaluation.ValueExprEvaluationException; +import org.openrdf.query.algebra.evaluation.function.Function; + +/** + * This {@link Function} determines whether two {@link XMLSchema#DATETIME}s occur within a specified period of time of + * one another. The method {@link Function#evaluate(ValueFactory, Value...)} expects four values, where the first two + * values are the datetimes, the third value is an integer indicating the period, and the fourth value is a URI + * indicating the time unit of the period. The URI must be of Type DurationDescription in the OWL-Time ontology (see + * <a href ="https://www.w3.org/TR/owl-time/">https://www.w3.org/TR/owl-time/</a>). Examples of valid time unit URIs can + * be found in the class {@link OWLTime} and below + * <ul> --- End diff -- Nit: As a user, I'd love a 5th optional argument that allows me to specify exclusiveness or inclusiveness of the period.
---