SparqlParserUtilTest.java

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 * 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
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 * Unless required by applicable law or agreed to in writing, software
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package org.xenei.jdbc4sparql.sparql.parser;

import java.util.List;

import org.junit.Assert;
import org.junit.Test;

import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.NodeFactory;
import com.hp.hpl.jena.sparql.core.TriplePath;
import com.hp.hpl.jena.sparql.core.Var;
import com.hp.hpl.jena.sparql.path.P_Link;
import com.hp.hpl.jena.sparql.path.Path;
import com.hp.hpl.jena.sparql.syntax.Element;
import com.hp.hpl.jena.sparql.syntax.ElementGroup;
import com.hp.hpl.jena.sparql.syntax.ElementPathBlock;

public class SparqlParserUtilTest {
	private final Var vIs = Var.alloc("is");
	private final Var vWas = Var.alloc("was");
	private final Node nWho = NodeFactory.createURI("who");
	private final Node nWhat = NodeFactory.createURI("what");
	private final Path pWho = new P_Link(nWho);
	private final Path pWhat = new P_Link(nWhat);
	private final Node nThis = NodeFactory.createLiteral("this");
	private final Node nThat = NodeFactory.createLiteral("that");

	@Test
	public void parseDisjointQuerySegmentTest() throws Exception {
		final Element parsed = SparqlParser.Util.parse("{ ?is <who> 'this' ."
				+ "?was <what> 'that' }");
		Assert.assertTrue(parsed instanceof ElementGroup);
		List<Element> lst = ((ElementGroup) parsed).getElements();
		Assert.assertEquals(1, lst.size());
		Assert.assertTrue(parsed instanceof ElementGroup);
		lst = ((ElementGroup) parsed).getElements();
		final Element e = lst.get(0);
		Assert.assertTrue(e instanceof ElementPathBlock);
		final ElementPathBlock epb = (ElementPathBlock) e;
		final List<TriplePath> l = epb.getPattern().getList();
		Assert.assertEquals(2, l.size());
		Assert.assertEquals(new TriplePath(vIs, pWho, nThis), l.get(0));
		Assert.assertEquals(new TriplePath(vWas, pWhat, nThat), l.get(1));
	}

	@Test
	public void parseLinkedQuerySegmentTest() throws Exception {
		final Element parsed = SparqlParser.Util.parse("{ ?is <who> 'this' ;"
				+ "	<what> 'that' }");
		Assert.assertTrue(parsed instanceof ElementGroup);
		final List<Element> lst = ((ElementGroup) parsed).getElements();
		final Element e = lst.get(0);
		Assert.assertTrue(e instanceof ElementPathBlock);
		final ElementPathBlock epb = (ElementPathBlock) e;
		final List<TriplePath> l = epb.getPattern().getList();
		Assert.assertEquals(2, l.size());
		Assert.assertEquals(new TriplePath(vIs, pWho, nThis), l.get(0));
		Assert.assertEquals(new TriplePath(vIs, pWhat, nThat), l.get(1));
	}

	@Test
	public void parseSingleQuerySegmentTest() throws Exception {
		final Element parsed = SparqlParser.Util.parse("{ ?is <who> 'that' }");

		Assert.assertTrue(parsed instanceof ElementGroup);
		final List<Element> lst = ((ElementGroup) parsed).getElements();
		Assert.assertEquals(1, lst.size());
		final Element e = lst.get(0);
		Assert.assertTrue(e instanceof ElementPathBlock);
		final ElementPathBlock epb = (ElementPathBlock) e;
		final List<TriplePath> l = epb.getPattern().getList();
		Assert.assertEquals(1, l.size());
		Assert.assertEquals(new TriplePath(vIs, pWho, nThat), l.get(0));
	}

}