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...ation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/function/xsd/DateCast.java
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| /******************************************************************************* | ||
| * Copyright (c) 2022 Eclipse RDF4J contributors. | ||
| * | ||
| * All rights reserved. This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Distribution License v1.0 | ||
| * which accompanies this distribution, and is available at | ||
| * http://www.eclipse.org/org/documents/edl-v10.php. | ||
| * | ||
| * SPDX-License-Identifier: BSD-3-Clause | ||
| *******************************************************************************/ | ||
| package org.eclipse.rdf4j.query.algebra.evaluation.function.xsd; | ||
|
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| import static javax.xml.datatype.DatatypeConstants.FIELD_UNDEFINED; | ||
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| import static org.eclipse.rdf4j.model.datatypes.XMLDatatypeUtil.isValidDate; | ||
| import static org.eclipse.rdf4j.model.datatypes.XMLDatatypeUtil.isValidDateTime; | ||
| import static org.eclipse.rdf4j.model.vocabulary.XSD.DATE; | ||
| import static org.eclipse.rdf4j.model.vocabulary.XSD.DATETIME; | ||
| import static org.eclipse.rdf4j.model.vocabulary.XSD.STRING; | ||
|
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| import javax.xml.datatype.XMLGregorianCalendar; | ||
|
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| import org.eclipse.rdf4j.model.IRI; | ||
| import org.eclipse.rdf4j.model.Literal; | ||
| import org.eclipse.rdf4j.model.Value; | ||
| import org.eclipse.rdf4j.model.ValueFactory; | ||
| import org.eclipse.rdf4j.query.algebra.evaluation.ValueExprEvaluationException; | ||
|
|
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| /** | ||
| * A {@link org.eclipse.rdf4j.query.algebra.evaluation.function.Function} that tries to cast its argument to an | ||
| * <var>xsd:date</var>. | ||
| */ | ||
| public class DateCast extends CastFunction { | ||
|
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| private static final String ZERO = "0"; | ||
|
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| @Override | ||
| protected IRI getXsdDatatype() { | ||
| return DATE; | ||
| } | ||
|
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| @Override | ||
| protected boolean isValidForDatatype(String lexicalValue) { | ||
| return isValidDate(lexicalValue); | ||
| } | ||
|
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| @Override | ||
| protected Literal convert(ValueFactory vf, Value value) throws ValueExprEvaluationException { | ||
| if (value instanceof Literal) { | ||
| Literal literal = (Literal) value; | ||
| IRI datatype = literal.getDatatype(); | ||
|
|
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| if (STRING.equals(datatype) || DATETIME.equals(datatype)) { | ||
| try { | ||
| XMLGregorianCalendar calValue = literal.calendarValue(); | ||
| int year = calValue.getYear(); | ||
| int month = calValue.getMonth(); | ||
| int day = calValue.getDay(); | ||
| int timezoneOffset = calValue.getTimezone(); | ||
|
|
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| if (FIELD_UNDEFINED != year && FIELD_UNDEFINED != month && FIELD_UNDEFINED != day) { | ||
| StringBuilder builder = new StringBuilder(); | ||
| builder.append(year).append("-"); | ||
| addZeroIfNeeded(month, builder); | ||
| builder.append(month).append("-"); | ||
| addZeroIfNeeded(day, builder); | ||
| builder.append(day); | ||
|
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| if (FIELD_UNDEFINED != timezoneOffset) { | ||
| int minutes = Math.abs(timezoneOffset); | ||
| int hours = minutes / 60; | ||
| minutes = minutes - (hours * 60); | ||
| builder.append(timezoneOffset > 0 ? "+" : "-"); | ||
| addZeroIfNeeded(hours, builder); | ||
| builder.append(hours); | ||
| builder.append(":"); | ||
| addZeroIfNeeded(minutes, builder); | ||
| builder.append(minutes); | ||
| } | ||
|
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| return vf.createLiteral(builder.toString(), DATE); | ||
| } else { | ||
| throw typeError(literal, null); | ||
| } | ||
| } catch (IllegalArgumentException e) { | ||
| throw typeError(literal, e); | ||
| } | ||
| } | ||
| } | ||
| throw typeError(value, null); | ||
| } | ||
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| private static void addZeroIfNeeded(int value, StringBuilder builder) { | ||
| if (value < 10) { | ||
| builder.append(ZERO); | ||
| } | ||
| } | ||
| } |
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121 changes: 121 additions & 0 deletions
121
...n/src/test/java/org/eclipse/rdf4j/query/algebra/evaluation/function/xsd/TestDateCast.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,121 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2022 Eclipse RDF4J contributors. | ||
| * | ||
| * All rights reserved. This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Distribution License v1.0 | ||
| * which accompanies this distribution, and is available at | ||
| * http://www.eclipse.org/org/documents/edl-v10.php. | ||
| * | ||
| * SPDX-License-Identifier: BSD-3-Clause | ||
| *******************************************************************************/ | ||
| package org.eclipse.rdf4j.query.algebra.evaluation.function.xsd; | ||
|
|
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| import static org.assertj.core.api.Assertions.assertThat; | ||
| import static org.assertj.core.api.Assertions.assertThatExceptionOfType; | ||
| import static org.eclipse.rdf4j.model.datatypes.XMLDatatypeUtil.parseCalendar; | ||
| import static org.eclipse.rdf4j.model.vocabulary.XSD.DATE; | ||
| import static org.junit.Assert.assertNotNull; | ||
| import static org.junit.Assert.fail; | ||
|
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| import org.eclipse.rdf4j.model.Literal; | ||
| import org.eclipse.rdf4j.model.ValueFactory; | ||
| import org.eclipse.rdf4j.model.impl.SimpleValueFactory; | ||
| import org.eclipse.rdf4j.query.algebra.evaluation.ValueExprEvaluationException; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
|
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| public class TestDateCast { | ||
|
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| private DateCast dateCast; | ||
| private final ValueFactory vf = SimpleValueFactory.getInstance(); | ||
|
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| @Before | ||
| public void setUp() throws Exception { | ||
| dateCast = new DateCast(); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_date() { | ||
| testDateCast(vf.createLiteral("1999-09-09"), "1999-09-09"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_date_withTimeZone_utc() { | ||
| testDateCast(vf.createLiteral("1999-09-09Z"), "1999-09-09Z"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_date_withTimeZone_offset() { | ||
| testDateCast(vf.createLiteral("1999-09-09-06:00"), "1999-09-09-06:00"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_date_invalid() { | ||
| // Arrange | ||
| Literal plainLit = vf.createLiteral("1999-09-xx"); | ||
|
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| // Act & Assert | ||
| assertThatExceptionOfType(ValueExprEvaluationException.class).isThrownBy(() -> dateCast.evaluate(vf, plainLit)); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_dateTime() { | ||
| testDateCast(vf.createLiteral("1999-09-09T14:45:13"), "1999-09-09"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_dateTime_withTimeZone_utc() { | ||
| testDateCast(vf.createLiteral("1999-09-09T14:45:13Z"), "1999-09-09-00:00"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_dateTime_withTimeZone_offset() { | ||
| testDateCast(vf.createLiteral("1999-09-09T14:45:13-06:00"), "1999-09-09-06:00"); | ||
| } | ||
|
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| @Test | ||
| public void testCastPlainLiteral_dateTime_invalid() { | ||
| // Arrange | ||
| Literal plainLit = vf.createLiteral("1999-09-09T14:45:xx"); | ||
|
|
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| // Act & Assert | ||
| assertThatExceptionOfType(ValueExprEvaluationException.class).isThrownBy(() -> dateCast.evaluate(vf, plainLit)); | ||
| } | ||
|
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| @Test | ||
| public void testCastDateLiteral() { | ||
| testDateCast(vf.createLiteral("2022-11-01Z", DATE), "2022-11-01Z"); | ||
| } | ||
|
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| @Test | ||
| public void testCastDateTimeLiteral() { | ||
| testDateCast(vf.createLiteral(parseCalendar("1999-09-09T14:45:13")), "1999-09-09"); | ||
| } | ||
|
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| @Test | ||
| public void testCastDateTimeLiteral_withTimeZone_utc() { | ||
| testDateCast(vf.createLiteral(parseCalendar("1999-09-09T14:45:13Z")), "1999-09-09-00:00"); | ||
| } | ||
|
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| @Test | ||
| public void testCastDateTimeLiteral_withTimeZone_offset() { | ||
| testDateCast(vf.createLiteral(parseCalendar("1999-09-09T14:45:13+03:00")), "1999-09-09+03:00"); | ||
| } | ||
|
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| private void testDateCast(Literal literal, String expected) { | ||
| // Arrange | ||
| Literal result = null; | ||
|
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| // Act | ||
| try { | ||
| result = dateCast.evaluate(vf, literal); | ||
| } catch (ValueExprEvaluationException e) { | ||
| fail(e.getMessage()); | ||
| } | ||
|
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| // Assert | ||
| assertNotNull(result); | ||
| assertThat(result.getLabel()).isEqualTo(expected); | ||
| assertThat(result.getDatatype()).isEqualTo(DATE); | ||
| } | ||
| } |
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