@Override public void setLevelConstraint(final int levelConstraint) { // store the current level constraint before updating final int oldLevelConstraint = this.levelConstraint; // update level constraint super.setLevelConstraint(levelConstraint); // update level constraint of the root root.setLevelConstraint(levelConstraint); // update level of childs and descendants NodeQuery q; for (final NodeBooleanClause clause : clauses) { q = clause.getQuery(); // compute delta between old level and descendant level final int levelDelta = q.getLevelConstraint() - oldLevelConstraint; // update level of descendant q.setLevelConstraint(levelConstraint + levelDelta); } }
@Test public void testRewriteEmptyClauses() throws IOException { final TwigQuery tq = new TwigQuery(2); tq.addRoot(new NodeTermQuery(new Term("field", "value"))); tq.setBoost(0.5f); // it must be rewritten into the root query final NodeQuery q = (NodeQuery) tq.rewrite(null); assertTrue(q instanceof NodeTermQuery); assertEquals(2, q.getLevelConstraint()); assertEquals(tq.getBoost(), q.getBoost(), 0); assertSame(tq.ancestor, q.ancestor); }
@Test public void testSetLevelConstraint() { final TwigQuery tq1 = new TwigQuery(2); tq1.addDescendant(2, new NodeTermQuery(new Term("field", "value")), Occur.MUST); assertEquals(2, tq1.getLevelConstraint()); // Descendant node level must be relative to the twig level assertEquals(4, tq1.clauses().get(0).getQuery().getLevelConstraint()); tq1.setLevelConstraint(3); assertEquals(3, tq1.getLevelConstraint()); // level of descendant node must have been updated assertEquals(5, tq1.clauses().get(0).getQuery().getLevelConstraint()); final TwigQuery tq2 = new TwigQuery(); tq2.addChild(tq1, Occur.MUST); // level of tq1 must have been updated assertEquals(2, tq1.getLevelConstraint()); // level of descendant node must have been updated assertEquals(4, tq1.clauses().get(0).getQuery().getLevelConstraint()); final TwigQuery tq3 = new TwigQuery(3); tq3.addRoot(tq2); // level of tq2 must have been updated assertEquals(3, tq2.getLevelConstraint()); // level of tq1 must have been updated assertEquals(4, tq1.getLevelConstraint()); // level of descendant node must have been updated assertEquals(6, tq1.clauses().get(0).getQuery().getLevelConstraint()); }
NodeQuery q = (NodeQuery) tq.rewrite(null); assertTrue(q instanceof AncestorFilterQuery); assertEquals(2, q.getLevelConstraint()); assertEquals(tq.getBoost(), q.getBoost(), 0);
@Test public void testRewriteTwigQueryRoot() throws IOException { // if the root node of a twig query is another twig query, then they must // be merged final TwigQuery tq2 = new TwigQuery(2); tq2.addRoot(new NodeTermQuery(new Term("root2", "root2"))); tq2.addChild(new NodeTermQuery(new Term("child2", "child2")), Occur.MUST); tq2.setBoost(0.5f); final TwigQuery tq1 = new TwigQuery(); tq1.addRoot(tq2); tq1.addChild(new NodeTermQuery(new Term("child1", "child1")), Occur.MUST); tq1.setBoost(0.5f); final NodeQuery q = (NodeQuery) tq1.rewrite(null); assertTrue(q instanceof TwigQuery); final TwigQuery tq = (TwigQuery) q; // level and boosst must be the same than for tq1 assertEquals(1, tq.getLevelConstraint()); assertEquals(tq.getBoost(), tq1.getBoost(), 0); // root must not be the same than for tq2 (it has been cloned) assertNotSame(tq.getRoot(), tq2.getRoot()); // root must be equal to the root of tq2 assertEquals(tq.getRoot(), tq2.getRoot()); // clauses must be merged assertEquals(2, tq.clauses().size()); for (final NodeBooleanClause clause : tq.clauses()) { assertEquals(2, clause.getQuery().getLevelConstraint()); assertSame(tq.getRoot(), clause.getQuery().ancestor); } }
@Test public void testSetAncestorPointer() { final NodeTermQuery term = new NodeTermQuery(new Term("field", "value")); final TwigQuery tq1 = new TwigQuery(); tq1.addDescendant(2, term, Occur.MUST); // ancestor of term query must be the root of the twig assertSame(tq1.getRoot(), term.ancestor); // ancestor of the twig must be null assertNull(tq1.ancestor); final TwigQuery tq2 = new TwigQuery(); tq2.addChild(tq1, Occur.MUST); // ancestor of tq1 and of its root must have been updated assertSame(tq2.getRoot(), tq1.ancestor); assertSame(tq2.getRoot(), tq1.getRoot().ancestor); // ancestor of tq1's descendant must have not changed assertEquals(4, tq1.clauses().get(0).getQuery().getLevelConstraint()); final TwigQuery tq3 = new TwigQuery(3); tq3.addRoot(tq2); // ancestor of tq2 and of its root must be the ancestor of tq3 assertSame(tq3.ancestor, tq2.ancestor); assertSame(tq2.ancestor, tq2.getRoot().ancestor); }