/*
* 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 org.apache.jena.sparql.algebra.optimize ;
import org.apache.jena.atlas.lib.StrUtils ;
import org.apache.jena.sparql.algebra.Transform ;
import org.apache.jena.sparql.algebra.optimize.AbstractTestTransform ;
import org.apache.jena.sparql.algebra.optimize.TransformTopN ;
import org.junit.Test ;
public class TestTransformTopN extends AbstractTestTransform {
public TestTransformTopN() {}
@Test public void topN_01() {
String input = StrUtils.strjoinNL
("(slice _ 5"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) ))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z)"
," (bgp (triple ?s ?p ?z)))"
);
test(input, output) ;
}
@Test public void topN_02() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (project (?z)"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?z)"
," (top (5 ?z)"
," (bgp (triple ?s ?p ?z)) ))"
);
test(input, output) ;
}
@Test public void topN_03() {
String input = StrUtils.strjoinNL
("(slice _ 5"
," (project (?s ?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?s ?z)"
," (top (5 ?z ?s)"
," (bgp (triple ?s ?p ?z)) ))"
);
test(input, output) ;
}
@Test public void topN_04() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (project (?s ?z)"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?s ?z)"
," (top (5 ?z)"
," (bgp (triple ?s ?p ?z))))"
);
test(input, output) ;
}
@Test public void topN_05() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (project (?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?z)"
," (top (5 ?z ?s)"
," (bgp (triple ?s ?p ?z)) ))"
);
// Order being wider than project blocks the optimization.
test(input, output) ;
}
@Test public void topN_06() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (project (?s ?p)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?s ?p)"
," (top (5 ?z ?s)"
," (bgp (triple ?s ?p ?z)) ))"
);
test(input, output) ;
}
@Test public void topN_07() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (project (?s ?p ?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(project (?s ?p ?z)"
," (top (5 ?z ?s)"
," (bgp (triple ?s ?p ?z)) ))"
);
test(input, output) ;
}
// ---- The same but with distinct
@Test public void topN_11() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z)"
," (distinct"
," (bgp (triple ?s ?p ?z)) ))"
);
test(input, output) ;
}
@Test public void topN_12() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?s ?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) ))))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z ?s)"
," (distinct"
," (project (?s ?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
test(input, output) ;
}
@Test public void topN_13() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?z)"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) ))))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z)"
," (distinct"
," (project (?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
test(input, output) ;
}
@Test public void topN_14() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?s ?z)"
," (order (?z)"
," (bgp (triple ?s ?p ?z)) ))))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z)"
," (distinct"
," (project (?s ?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
test(input, output) ;
}
@Test public void topN_15() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) ))))"
);
// Order being wider than project blocks the optimization.
String output = input ;
test(input, output) ;
}
@Test public void topN_16() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?s ?p)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) ))))"
);
// The mismatch of project and order blocks the optimization.
String output = input ;
test(input, output) ;
}
@Test public void topN_17() {
String input =
StrUtils.strjoinNL
("(slice _ 5"
," (distinct"
," (project (?s ?p ?z)"
," (order (?z ?s)"
," (bgp (triple ?s ?p ?z)) ))))"
);
String output = StrUtils.strjoinNL
("(top (5 ?z ?s)"
," (distinct"
," (project (?s ?p ?z)"
," (bgp (triple ?s ?p ?z)) )))"
);
test(input, output) ;
}
// ---- From query to transfomed algebra.
@Test public void topN_query_01() {
String output = StrUtils.strjoinNL
(" (project (?s)"
," (order (?p ?o)"
," (bgp (triple ?s ?p ?o))))"
);
testQuery("SELECT ?s { ?s ?p ?o } ORDER BY ?p ?o", output);
}
@Test public void topN_query_02() {
String output = StrUtils.strjoinNL
(" (slice 1 _"
," (project (?s)"
," (top (6 ?p ?o)"
," (bgp (triple ?s ?p ?o)))))"
) ;
testQuery("SELECT ?s { ?s ?p ?o } ORDER BY ?p ?o OFFSET 1 LIMIT 5", output);
}
@Test public void topN_query_03() {
String output = StrUtils.strjoinNL
("(slice 1 _"
," (project (?s)"
," (top (6 ?p ?o)"
," (bgp (triple ?s ?p ?o)))))"
);
testQuery("SELECT ?s { ?s ?p ?o } ORDER BY ?p ?o OFFSET 1 LIMIT 5", output);
}
@Test public void topN_query_04() {
String output = StrUtils.strjoinNL
("(slice 1 _"
," (project (?s)"
," (top (6 ?p ?o)"
," (bgp (triple ?s ?p ?o)))))"
); testQuery("SELECT ?s { ?s ?p ?o } ORDER BY ?p ?o OFFSET 1 LIMIT 5", output);
}
private void test(String input, String output) {
Transform transform = new TransformTopN() ;
testOp(input, transform, output) ;
}
// ---- From query to transfomed algebra.
private void testQuery(String input, String output) {
Transform transform = new TransformTopN() ;
testQuery(input, transform, output) ;
}
}