Github user kchilton2 commented on a diff in the pull request: https://github.com/apache/incubator-rya/pull/237#discussion_r143049174 --- Diff: common/rya.api/src/main/java/org/apache/rya/api/functions/OWLTime.java --- @@ -0,0 +1,147 @@ +/* + * 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 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 { + + /** + * 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; + /** + * Minutes class of type DurationDescription in OWL-Time ontology + */ + public static final URI MINUTES_URI; + /** + * Hours class of type DurationDescription in OWL-Time ontology + */ + public static final URI HOURS_URI; + /** + * Days class of type DurationDescription in OWL-Time ontology + */ + public static final URI DAYS_URI; + /** + * Weeks class of type DurationDescription in OWL-Time ontology + */ + public static final URI WEEKS_URI; + /** + * Months class of type DurationDescription in OWL-Time ontology + */ + public static final URI MONTHS_URI; + /** + * Years class of type DurationDescription in OWL-Time ontology + */ + public static final URI YEARS_URI; + + public static boolean isValidDurationType(URI duration) { + return (duration.equals(SECONDS_URI) || duration.equals(MINUTES_URI) || duration.equals(HOURS_URI) || duration.equals(DAYS_URI) + || duration.equals(WEEKS_URI) || duration.equals(MONTHS_URI) || duration.equals(YEARS_URI)); + } + + static { + ValueFactory factory = ValueFactoryImpl.getInstance(); + SECONDS_URI = factory.createURI(NAMESPACE, "seconds"); + MINUTES_URI = factory.createURI(NAMESPACE, "minutes"); + HOURS_URI = factory.createURI(NAMESPACE, "hours"); + DAYS_URI = factory.createURI(NAMESPACE, "days"); + WEEKS_URI = factory.createURI(NAMESPACE, "weeks"); + MONTHS_URI = factory.createURI(NAMESPACE, "months"); + YEARS_URI = factory.createURI(NAMESPACE, "years"); + } + + public static enum Duration { + SECONDS(1000, SECONDS_URI), + MINUTES(60000, MINUTES_URI), + HOURS(3600000, HOURS_URI), + DAYS(86400000, DAYS_URI), + WEEKS(604800000, WEEKS_URI), + MONTHS(2592000000L, MONTHS_URI), + YEARS(31536000000L, YEARS_URI); + + private final URI uri; + private final long millisConversion; + + Duration(long millisConversion, URI uri) { + this.uri = uri; + this.millisConversion = millisConversion; + } + + public long millisConversion() { + return millisConversion; + } + + public URI uri() { + return uri; + } + + /** + * Returns the duration in milliseconds + * + * @param duration - amount of time in the units indicated by the provided {@link OWLTime} URI + * @param uri - OWLTime URI indicating the time unit of duration + * @return - the amount of time in milliseconds + */ + public static long getMillis(int duration, URI uri) { + Duration durEnum = getDurationFromURI(uri); + return duration * durEnum.millisConversion(); + } + + /** + * Provides the Duration from the given duration URI. + * @param uri + * @return - Duration enum type + */ + public static Duration getDurationFromURI(URI uri) { --- End diff -- This could be map based. Build out a static map of URI to Duration, then return it from here.
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