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ASF GitHub Bot commented on RYA-392: ------------------------------------ Github user meiercaleb commented on a diff in the pull request: https://github.com/apache/incubator-rya/pull/237#discussion_r143482636 --- Diff: common/rya.api/src/main/java/org/apache/rya/api/functions/OWLTime.java --- @@ -0,0 +1,114 @@ +/* + * 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.temporal.ChronoUnit; +import java.util.HashMap; +import java.util.Map; +import java.util.Optional; + +import org.openrdf.model.URI; +import org.openrdf.model.ValueFactory; +import org.openrdf.model.impl.ValueFactoryImpl; + +/** + * Constants for OWL-Time primitives in the OWL-Time namespace. + * + */ +public class OWLTime { + + private static final ValueFactory FACTORY = ValueFactoryImpl.getInstance(); + + /** + * Indicates namespace of OWL-Time ontology + */ + public static final String NAMESPACE = "http://www.w3.org/2006/time#"; + /** + * Seconds class of type DurationDescription in OWL-Time ontology + */ + public static final URI SECONDS_URI = FACTORY.createURI(NAMESPACE, "seconds"); + /** + * Minutes class of type DurationDescription in OWL-Time ontology + */ + public static final URI MINUTES_URI = FACTORY.createURI(NAMESPACE, "minutes"); + /** + * Hours class of type DurationDescription in OWL-Time ontology + */ + public static final URI HOURS_URI = FACTORY.createURI(NAMESPACE, "hours"); + /** + * Days class of type DurationDescription in OWL-Time ontology + */ + public static final URI DAYS_URI = FACTORY.createURI(NAMESPACE, "days"); + /** + * Weeks class of type DurationDescription in OWL-Time ontology + */ + public static final URI WEEKS_URI = FACTORY.createURI(NAMESPACE, "weeks"); + + private static final Map<URI, ChronoUnit> DURATION_MAP = new HashMap<>(); + + static { + DURATION_MAP.put(SECONDS_URI, ChronoUnit.SECONDS); + DURATION_MAP.put(MINUTES_URI, ChronoUnit.MINUTES); + DURATION_MAP.put(HOURS_URI, ChronoUnit.HOURS); + DURATION_MAP.put(DAYS_URI, ChronoUnit.DAYS); + DURATION_MAP.put(WEEKS_URI, ChronoUnit.WEEKS); + } + + /** + * Verifies whether URI is a valid OWL-Time URI that is supported by this class. + * @param durationURI - OWLTime URI indicating the time unit --- End diff -- Done. > Temporal Difference Function > ---------------------------- > > Key: RYA-392 > URL: https://issues.apache.org/jira/browse/RYA-392 > Project: Rya > Issue Type: New Feature > Affects Versions: 3.2.11 > Reporter: Caleb Meier > Assignee: Caleb Meier > > Currently Rya does not provide a Function that determines whether two > temporal literals are within a given period of time of one another. This is > extremely useful for filtering on query results that occurred within a fixed > period of time of a given instant. Currently, if one attempts to form the > following filter Filter(?time1 - ?time2 < "24"^^xsd:hour), an exception will > be thrown if ?time1 and ?time2 are date time literals. I propose > implementing a Function that takes in two temporal literals, an integer and a > time unit and determines whether the date times are within the prescribed > period of one another. -- This message was sent by Atlassian JIRA (v6.4.14#64029)