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87 changes: 87 additions & 0 deletions
87
...re/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/NoneStep.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| * 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.tinkerpop.gremlin.process.traversal.step.filter; | ||
|
|
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| import org.apache.tinkerpop.gremlin.process.traversal.GremlinTypeErrorException; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.P; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequirement; | ||
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; | ||
| import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; | ||
|
|
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| import java.util.EnumSet; | ||
| import java.util.Iterator; | ||
| import java.util.Set; | ||
|
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| public final class NoneStep<S, S2> extends FilterStep<S> { | ||
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| private P<S2> predicate; | ||
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| public NoneStep(final Traversal.Admin traversal, final P<S2> predicate) { | ||
| super(traversal); | ||
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| if (null == predicate) { | ||
| throw new IllegalArgumentException("Input predicate to none step can't be null."); | ||
| } | ||
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| this.predicate = predicate; | ||
| } | ||
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| @Override | ||
| protected boolean filter(final Traverser.Admin<S> traverser) { | ||
| final S item = traverser.get(); | ||
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| if (item instanceof Iterable || item instanceof Iterator || ((item != null) && item.getClass().isArray())) { | ||
| GremlinTypeErrorException typeError = null; | ||
| final Iterator<S2> iterator = IteratorUtils.asIterator(item); | ||
| while (iterator.hasNext()) { | ||
| try { | ||
| if (this.predicate.test(iterator.next())) { | ||
| return false; | ||
| } | ||
| } catch (GremlinTypeErrorException gtee) { | ||
| // hold onto it until the end in case any other element evaluates to TRUE | ||
| typeError = gtee; | ||
| } | ||
| } | ||
| if (typeError != null) throw typeError; | ||
| return true; | ||
| } | ||
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| return false; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return StringFactory.stepString(this, this.predicate); | ||
| } | ||
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| @Override | ||
| public NoneStep<S, S2> clone() { | ||
| final NoneStep<S, S2> clone = (NoneStep<S, S2>) super.clone(); | ||
| clone.predicate = this.predicate.clone(); | ||
| return clone; | ||
| } | ||
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| @Override | ||
| public Set<TraverserRequirement> getRequirements() { | ||
| return EnumSet.of(TraverserRequirement.OBJECT); | ||
| } | ||
| } |
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105 changes: 105 additions & 0 deletions
105
...rc/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/filter/NoneStepTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * 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.tinkerpop.gremlin.process.traversal.step.filter; | ||
|
|
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| import org.apache.tinkerpop.gremlin.process.traversal.P; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.TextP; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__; | ||
| import org.apache.tinkerpop.gremlin.process.traversal.step.StepTest; | ||
| import org.junit.Test; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
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| import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.any; | ||
| import static org.junit.Assert.assertArrayEquals; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.assertThrows; | ||
| import static org.junit.Assert.assertTrue; | ||
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| public class NoneStepTest extends StepTest { | ||
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| @Override | ||
| protected List<Traversal> getTraversals() { return Collections.singletonList(__.none(P.gt(0))); } | ||
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| @Test | ||
| public void testReturnTypes() { | ||
| assertTrue(__.__(new int[]{}).none(P.gt(7)).hasNext()); | ||
| assertArrayEquals(new int[] {5, 6}, __.__(new int[] {5, 8, 10}, new int[] {5, 6}).not(any(P.gte(7))).next()); | ||
| assertArrayEquals(new long[] {5L, 6L}, __.__(new long[] {5L, 8L, 10L}, new long[] {5L, 6L}).none(P.gte(7)).next()); | ||
| assertArrayEquals(new Long[] {5L, 6L}, __.__(1).constant(new Long[] {5L, 6L}).none(P.gte(7)).next()); | ||
| assertArrayEquals(new double[] {5.1, 6.5}, __.__(new double[] {5.5, 8.0, 10.1}, new double[] {5.1, 6.5}).none(P.gte(7.0)).next(), 0.01); | ||
| } | ||
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| @Test | ||
| public void testNullParameter() { | ||
| final Throwable thrown = assertThrows(IllegalArgumentException.class, () -> __.__(new int[]{1}).none(null).hasNext()); | ||
| assertEquals("Input predicate to none step can't be null.", thrown.getMessage()); | ||
| } | ||
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| @Test | ||
| public void testSetTraverser() { | ||
| final Set<Integer> numbers = new HashSet<>(); | ||
| numbers.add(5); | ||
| numbers.add(6); | ||
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| assertTrue(__.__(numbers).none(P.gt(7)).hasNext()); | ||
| } | ||
|
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| @Test | ||
| public void testListIteratorTraverser() { | ||
| final List<Integer> numbers = new ArrayList<>(); | ||
| numbers.add(10); | ||
| numbers.add(11); | ||
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| assertTrue(__.__(numbers.iterator()).none(P.lt(10)).hasNext()); | ||
| } | ||
|
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| @Test | ||
| public void testCornerCases() { | ||
| final List validOne = new ArrayList() {{ add(20); }}; | ||
| final List validTwo = new ArrayList() {{ add(21); add(25);}}; | ||
| final List validThree = new ArrayList() {{ add(51); add(57); add(71); }}; | ||
| final List containsNull = new ArrayList() {{ add(50); add(null); add(60); }}; | ||
| final List containsNull2 = new ArrayList() {{ add(1); add(null); add(2); }}; | ||
| final List empty = new ArrayList(); | ||
| final List incorrectType = new ArrayList() {{ add(100); add("25"); }}; | ||
| final List valueTooSmall = new ArrayList() {{ add(101); add(1); add(10);}}; | ||
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| final List bcd = new ArrayList() {{ add(null); add("bcd"); }}; | ||
| final List bcdnull = new ArrayList() {{ add("bcd"); }}; | ||
| final List abc = new ArrayList() {{ add("abc"); }}; | ||
| final List abcnull = new ArrayList() {{ add("abc"); add(null); }}; | ||
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| assertEquals(4L, __.__(validOne, null, containsNull, empty, incorrectType, valueTooSmall, validTwo, validThree) | ||
| .none(P.lte(3)).count().next().longValue()); | ||
| assertEquals(1L, __.__(bcd).none(TextP.startingWith("a")).count().next().longValue()); // e 0 a 0 | ||
| assertEquals(1L, __.__(bcdnull).none(TextP.startingWith("a")).count().next().longValue()); // actual 1 | ||
| assertEquals(0L, __.__(abc).none(TextP.startingWith("a")).count().next().longValue()); // actual 0 | ||
| assertEquals(0L, __.__(abcnull).none(TextP.startingWith("a")).count().next().longValue()); // actual 0 | ||
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| assertEquals(1L, __.__(bcd).all(TextP.startingWith("a")).count().next().longValue()); // actual 0 | ||
| assertEquals(1L, __.__(bcdnull).all(TextP.startingWith("a")).count().next().longValue()); // actual 1 | ||
| assertEquals(0L, __.__(abcnull).all(TextP.startingWith("a")).count().next().longValue()); // actual 0 | ||
| } | ||
| } |
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