/*
* 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 com.hp.hpl.jena.graph.compose.test;
import com.hp.hpl.jena.graph.*;
import com.hp.hpl.jena.graph.compose.MultiUnion;
import com.hp.hpl.jena.graph.impl.GraphBase;
import com.hp.hpl.jena.graph.test.GraphTestBase;
import com.hp.hpl.jena.util.iterator.ExtendedIterator;
public class TestUnionStatistics extends GraphTestBase
{
public TestUnionStatistics( String name )
{ super( name ); }
static class AnInteger
{
public int value = 0;
public AnInteger( int value )
{ this.value = value; }
}
public void testUnionValues()
{
testUnion( 0, 0, 0, 0 );
}
public void testCopiesSingleNonZeroResult()
{
testUnion( 1, 1, 0, 0 );
testUnion( 1, 0, 1, 0 );
testUnion( 1, 0, 0, 1 );
testUnion( 1, 1, 0, 0 );
testUnion( 2, 0, 2, 0 );
testUnion( 4, 0, 0, 4 );
}
public void testResultIsSumOfBaseResults()
{
testUnion( 3, 1, 2, 0 );
testUnion( 5, 1, 0, 4 );
testUnion( 6, 0, 2, 4 );
testUnion( 7, 1, 2, 4 );
testUnion( 3, 0, 2, 1 );
testUnion( 5, 4, 1, 0 );
testUnion( 6, 2, 2, 2 );
testUnion( 7, 6, 0, 1 );
}
public void testUnknownOverrulesAll()
{
testUnion( -1, -1, 0, 0 );
testUnion( -1, 0, -1, 0 );
testUnion( -1, 0, 0, -1 );
testUnion( -1, -1, 1, 1 );
testUnion( -1, 1, -1, 1 );
testUnion( -1, 1, 1, -1 );
}
/**
Asserts that the statistic obtained by probing the three-element union
with statistics <code>av</code>, <code>bv</code>, and
<code>cv</code> is <code>expected</code>.
*/
private void testUnion( int expected, int av, int bv, int cv )
{
AnInteger a = new AnInteger( av ), b = new AnInteger( bv ), c = new AnInteger( cv );
Graph g1 = graphWithGivenStatistic( a );
Graph g2 = graphWithGivenStatistic( b );
Graph g3 = graphWithGivenStatistic( c );
Graph [] graphs = new Graph[]{g1, g2, g3};
MultiUnion mu = new MultiUnion( graphs );
GraphStatisticsHandler gs = new MultiUnion.MultiUnionStatisticsHandler( mu );
assertEquals( expected, gs.getStatistic( Node.ANY, Node.ANY, Node.ANY ) );
}
static Graph graphWithGivenStatistic( final AnInteger x )
{
return new GraphBase()
{
@Override protected ExtendedIterator<Triple> graphBaseFind( TripleMatch m )
{
throw new RuntimeException( "should never be called" );
}
@Override protected GraphStatisticsHandler createStatisticsHandler()
{
return new GraphStatisticsHandler()
{
@Override
public long getStatistic( Node S, Node P, Node O )
{ return x.value; }
};
}
};
}
}