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* 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.
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package org.apache.jena.sparql.algebra.optimize;
import org.apache.jena.atlas.junit.BaseTest ;
import org.apache.jena.sparql.algebra.Op ;
import org.apache.jena.sparql.algebra.Transformer ;
import org.apache.jena.sparql.algebra.optimize.TransformMergeBGPs ;
import org.apache.jena.sparql.sse.SSE ;
import org.junit.Test ;
public class TestTransformMergeBGPs extends BaseTest
{
String pre = "(prefix ((: <http://example/>))" ;
String post = ")" ;
@Test public void collapse_01() { test("(bgp (:x :p :z))") ; }
@Test public void collapse_02() { test("(table unit)") ; }
// Join.
@Test public void collapse_10() { test("(join (bgp (:x :p :z1)) (table unit) )") ; }
@Test public void collapse_11() { test("(join (table unit) (bgp (:x :p :z1)) )") ; }
@Test public void collapse_12() {
test("(join (bgp (:x :p :z1)) (bgp (:x :p :z2)) )",
"(bgp (:x :p :z1) (:x :p :z2))") ; }
@Test public void collapse_13() {
test("(join (bgp (:x :p :z1)) (join (bgp (:x :p :z2)) (bgp (:x :p :z3))) )",
"(bgp (:x :p :z1) (:x :p :z2) (:x :p :z3) )") ; }
@Test public void collapse_14() {
test("(join (join (bgp (:x :p :z1)) (bgp (:x :p :z2))) (bgp (:x :p :z3)) )",
"(bgp (:x :p :z1) (:x :p :z2) (:x :p :z3) )") ; }
// Sequence
@Test public void collapse_20() { test("(sequence (bgp (:x :p :z1)) (bgp (:x :p :z2)) )",
"(bgp (:x :p :z1) (:x :p :z2))") ; }
@Test public void collapse_21() { test("(sequence (bgp (:x :p :z1)) (bgp (:x :p :z2)) (bgp (:x :p :z3)) )",
"(bgp (:x :p :z1) (:x :p :z2) (:x :p :z3))") ; }
@Test public void collapse_22() { test("(sequence (table unit) (bgp (:x :p :z1)) (bgp (:x :p :z3)) )",
"(sequence (table unit) (bgp (:x :p :z1) (:x :p :z3)) )") ; }
@Test public void collapse_23() { test("(sequence (bgp (:x :p :z1)) (table unit) (bgp (:x :p :z3)) )") ; }
@Test public void collapse_24() { test("(sequence (bgp (:x :p :z1)) (bgp (:x :p :z3)) (table unit) )",
"(sequence (bgp (:x :p :z1) (:x :p :z3)) (table unit) )") ; }
// Compound
@Test public void collapse_30() { test("(join "+
"(sequence (bgp (:x :p :z1)) (bgp (:x :p :z2)) (bgp (:x :p :z3)) )"+
"(sequence (bgp (:x :p :z4)) (bgp (:x :p :z5)))"+
")",
"(bgp (:x :p :z1) (:x :p :z2) (:x :p :z3) (:x :p :z4) (:x :p :z5) )") ; }
@Test public void collapse_31() { test("(join "+
"(table unit)"+
"(sequence (bgp (:x :p :z4)) (bgp (:x :p :z5)))"+
")",
"(join (table unit) (bgp (:x :p :z4) (:x :p :z5)))") ; }
@Test public void collapse_32() { test("(join "+
"(sequence (bgp (:x :p :z4)) (bgp (:x :p :z5)))"+
"(table unit)"+
")",
"(join (bgp (:x :p :z4) (:x :p :z5)) (table unit) )") ; }
// Input = output
private void test(String input)
{
test(input, input) ;
}
private void test(String input, String output)
{
input = pre+input+post ;
output = pre+output+post ;
Op op1 = SSE.parseOp(input) ;
//op1 = Transformer.transform(new TransformPathFlattern(), op1) ;
Op op3 = Transformer.transform(new TransformMergeBGPs(), op1) ;
Op expected = SSE.parseOp(output) ;
assertEquals(expected, op3) ;
}
}