| /* |
| * 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.traverser; |
| |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Step; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSideEffects; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public class B_O_S_SE_SL_Traverser<T> extends B_O_Traverser<T> { |
| |
| protected Object sack = null; |
| protected short loops = 0; // an optimization hack to use a short internally to save bits :) |
| protected transient TraversalSideEffects sideEffects; |
| |
| protected B_O_S_SE_SL_Traverser() { |
| } |
| |
| public B_O_S_SE_SL_Traverser(final T t, final Step<T, ?> step, final long initialBulk) { |
| super(t, initialBulk); |
| this.sideEffects = step.getTraversal().getSideEffects(); |
| if (null != this.sideEffects.getSackInitialValue()) |
| this.sack = this.sideEffects.getSackInitialValue().get(); |
| } |
| |
| ///////////////// |
| |
| @Override |
| public <S> S sack() { |
| return (S) this.sack; |
| } |
| |
| @Override |
| public <S> void sack(final S object) { |
| this.sack = object; |
| } |
| |
| ///////////////// |
| |
| @Override |
| public int loops() { |
| return this.loops; |
| } |
| |
| @Override |
| public void incrLoops(final String stepLabel) { |
| this.loops++; |
| } |
| |
| @Override |
| public void resetLoops() { |
| this.loops = 0; |
| } |
| |
| ///////////////// |
| |
| @Override |
| public TraversalSideEffects getSideEffects() { |
| return this.sideEffects; |
| } |
| |
| |
| @Override |
| public void setSideEffects(final TraversalSideEffects sideEffects) { |
| this.sideEffects = sideEffects; |
| } |
| |
| ///////////////// |
| |
| @Override |
| public <R> Traverser.Admin<R> split(final R r, final Step<T, R> step) { |
| final B_O_S_SE_SL_Traverser<R> clone = (B_O_S_SE_SL_Traverser<R>) super.split(r, step); |
| clone.sack = null == clone.sack ? null : null == clone.sideEffects.getSackSplitter() ? clone.sack : clone.sideEffects.getSackSplitter().apply(clone.sack); |
| return clone; |
| } |
| |
| @Override |
| public Traverser.Admin<T> split() { |
| final B_O_S_SE_SL_Traverser<T> clone = (B_O_S_SE_SL_Traverser<T>) super.split(); |
| clone.sack = null == clone.sack ? null : null == clone.sideEffects.getSackSplitter() ? clone.sack : clone.sideEffects.getSackSplitter().apply(clone.sack); |
| return clone; |
| } |
| |
| @Override |
| public void merge(final Traverser.Admin<?> other) { |
| super.merge(other); |
| if (null != this.sack && null != this.sideEffects.getSackMerger()) |
| this.sack = this.sideEffects.getSackMerger().apply(this.sack, other.sack()); |
| |
| } |
| |
| ///////////////// |
| |
| @Override |
| public int hashCode() { |
| return this.t.hashCode() + this.future.hashCode() + this.loops; |
| } |
| |
| @Override |
| public boolean equals(final Object object) { |
| return object instanceof B_O_S_SE_SL_Traverser |
| && ((B_O_S_SE_SL_Traverser) object).t.equals(this.t) |
| && ((B_O_S_SE_SL_Traverser) object).future.equals(this.future) |
| && ((B_O_S_SE_SL_Traverser) object).loops == this.loops |
| && (null == this.sack || (null != this.sideEffects && null != this.sideEffects.getSackMerger())); // hmmm... serialization in OLAP destroys the transient sideEffects |
| } |
| } |