AbstractTestGraphOverDataset.java example

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.jena.sparql.core;

import java.util.Iterator ;

import org.apache.jena.atlas.iterator.Iter ;
import org.apache.jena.atlas.junit.BaseTest ;
import org.apache.jena.graph.Graph ;
import org.apache.jena.graph.Node ;
import org.apache.jena.graph.Triple ;
import org.apache.jena.shared.PrefixMapping ;
import org.apache.jena.sparql.core.DatasetGraph ;
import org.apache.jena.sparql.core.DatasetGraphViewGraphs ;
import org.apache.jena.sparql.core.Quad ;
import org.apache.jena.sparql.sse.SSE ;
import org.junit.Before ;
import org.junit.Test ;

public abstract class AbstractTestGraphOverDataset extends BaseTest
{
    // See also: ARQ/GraphsTests, TestGraphsMem(enable tests?), UnionTransformTests
    
    protected DatasetGraph baseDSG ;
    protected abstract DatasetGraph createBaseDSG() ;
    
    private static Quad q0 = SSE.parseQuad("(_ <s> <p> 0)") ;
    private static Quad q1 = SSE.parseQuad("(<g1> <s> <p> 1)") ;
    private static Quad q2 = SSE.parseQuad("(<g2> <s> <p> 2)") ;    // same triple - different graph
    private static Quad q3 = SSE.parseQuad("(<g3> <s> <p> 2)") ;    // same triple - different graph
    
    private static Node gn1 = SSE.parseNode("<g1>") ;
    private static Node gn2 = SSE.parseNode("<g2>") ;
    private static Node gn3 = SSE.parseNode("<g3>") ;
    private static Node gnNotSuchGraph = SSE.parseNode("<NoSuchGraph>") ;
    
    protected abstract Graph makeNamedGraph(DatasetGraph dsg, Node gn) ;
    protected abstract Graph makeDefaultGraph(DatasetGraph dsg) ;
    
    @Before public void before()
    {
        baseDSG = createBaseDSG() ;
        baseDSG.add(q0) ;
        baseDSG.add(q1) ;
        baseDSG.add(q2) ;
        baseDSG.add(q3) ;
    }
    
    @Test public void graphDSG_view_1()
    {
        Triple t = makeDefaultGraph(baseDSG).find(null, null, null).next() ;
        assertEquals(SSE.parseTriple("(<s> <p> 0)"), t) ;
        // Check exact iterator.
    }
    
    @Test public void graphDSG_view_2()
    {
        Triple t = makeNamedGraph(baseDSG, gn1).find(null, null, null).next() ;
        assertEquals(SSE.parseTriple("(<s> <p> 1)"), t) ;
        // Check exact iterator.
    }
    
    @Test public void graphDSG_view_3()
    {
        Graph g = makeDefaultGraph(baseDSG) ;
        g.add(SSE.parseTriple("(<s> <p> 99)")) ;
        long x = Iter.count(baseDSG.find(Quad.defaultGraphNodeGenerated, null, null, null)) ;
        assertEquals(2, x) ;
        assertEquals(2, g.size()) ;
        // Check exact iterator.
    }
    
    // non-existant graph
    @Test public void graphDSG_view_4()
    {
        Graph g = makeNamedGraph(baseDSG, gnNotSuchGraph) ;
        long x = Iter.count(baseDSG.find(gnNotSuchGraph, null, null, null)) ;
        assertEquals(0, x) ;
        assertEquals(0, g.size()) ;
    }

    // This test only works if the underlying dataset implements Quad.unionGraph   
    @Test public void graphDSG_view_union_1()
    {
        Graph g = makeNamedGraph(baseDSG, Quad.unionGraph) ;
        Iterator<Triple> iter = g.find(null,null,null) ;
        while(iter.hasNext())
            iter.next() ;
        assertEquals(2, g.size()) ;
    }

    // ---- contains
    
    @Test public void graphDSG_contains_1()
    {
        boolean b = new DatasetGraphViewGraphs(baseDSG).containsGraph(gn1) ;
        assertTrue(b) ;
    }
    
    @Test public void graphDSG_contains_2()
    {
        boolean b = new DatasetGraphViewGraphs(baseDSG).containsGraph(gnNotSuchGraph) ;
        assertFalse(b) ;
    }

    // ---- prefixes

    @Test public void graphDSG_prefixes_1()
    {
        Graph g = makeNamedGraph(baseDSG, gn1) ;
        PrefixMapping pmap = g.getPrefixMapping() ;
        assertNotNull(pmap) ;
    }
    
    @Test public void graphDSG_prefixes_2()
    {
        Graph g = makeNamedGraph(baseDSG, Quad.unionGraph) ;
        PrefixMapping pmap = g.getPrefixMapping() ;
        assertNotNull(pmap) ;
    }
    
    @Test public void graphDSG_prefixes_3()
    {
        Graph g = makeDefaultGraph(baseDSG) ;
        PrefixMapping pmap = g.getPrefixMapping() ;
        assertNotNull(pmap) ;
    }
    
    @Test public void graphDSG_prefixes_4()
    {
        // All graphs exist.
        Graph g = makeNamedGraph(baseDSG, gnNotSuchGraph)  ;
        PrefixMapping pmap = g.getPrefixMapping() ;
        assertNotNull(pmap) ;
    }
    
    // ---- update
    
    @Test public void graphDGS_update_1()
    {
        Quad q9 = SSE.parseQuad("(<g3> <s> <p> 9)") ;
        Graph g = makeNamedGraph(baseDSG, gn3)  ;
        baseDSG.add(q9) ;
        Triple t = SSE.parseTriple("(<s> <p> 9)") ;
        assertTrue(g.contains(t)) ;
    }
    
    @Test public void graphDGS_update_2()
    {
        Triple t = SSE.parseTriple("(<s> <p> 9)") ;
        Graph g = makeNamedGraph(baseDSG, gn3)  ;
        g.add(t) ;
        Quad q9 = SSE.parseQuad("(<g3> <s> <p> 9)") ;
        assertTrue(baseDSG.contains(q9)) ;
    }
}