| /* |
| * 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.computer.traversal; |
| |
| import org.apache.tinkerpop.gremlin.process.computer.Memory; |
| import org.apache.tinkerpop.gremlin.process.computer.MemoryComputeKey; |
| import org.apache.tinkerpop.gremlin.process.computer.ProgramPhase; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSideEffects; |
| |
| import java.util.HashSet; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.function.BinaryOperator; |
| import java.util.function.Supplier; |
| import java.util.function.UnaryOperator; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class MemoryTraversalSideEffects implements TraversalSideEffects { |
| |
| private TraversalSideEffects sideEffects; |
| private Memory memory; |
| private ProgramPhase phase; |
| |
| private MemoryTraversalSideEffects() { |
| // for serialization |
| } |
| |
| public MemoryTraversalSideEffects(final TraversalSideEffects sideEffects) { |
| this.sideEffects = sideEffects; |
| this.memory = null; |
| } |
| |
| public TraversalSideEffects getSideEffects() { |
| return this.sideEffects; |
| } |
| |
| @Override |
| public void set(final String key, final Object value) { |
| this.sideEffects.set(key, value); |
| if (null != this.memory) |
| this.memory.set(key, value); |
| } |
| |
| @Override |
| public <V> V get(final String key) throws IllegalArgumentException { |
| return (null != this.memory && this.memory.exists(key)) ? this.memory.get(key) : this.sideEffects.get(key); |
| } |
| |
| @Override |
| public void remove(final String key) { |
| this.sideEffects.remove(key); |
| } |
| |
| @Override |
| public Set<String> keys() { |
| return this.sideEffects.keys(); |
| } |
| |
| @Override |
| public void add(final String key, final Object value) { |
| if (this.phase.workerState()) |
| this.memory.add(key, value); |
| else |
| this.memory.set(key, this.sideEffects.getReducer(key).apply(this.memory.get(key), value)); |
| } |
| |
| @Override |
| public <V> void register(final String key, final Supplier<V> initialValue, final BinaryOperator<V> reducer) { |
| this.sideEffects.register(key, initialValue, reducer); |
| } |
| |
| @Override |
| public <V> void registerIfAbsent(final String key, final Supplier<V> initialValue, final BinaryOperator<V> reducer) { |
| this.sideEffects.registerIfAbsent(key, initialValue, reducer); |
| } |
| |
| @Override |
| public <V> BinaryOperator<V> getReducer(final String key) { |
| return this.sideEffects.getReducer(key); |
| } |
| |
| @Override |
| public <V> Supplier<V> getSupplier(final String key) { |
| return this.sideEffects.getSupplier(key); |
| } |
| |
| @Override |
| public <S> void setSack(final Supplier<S> initialValue, final UnaryOperator<S> splitOperator, final BinaryOperator<S> mergeOperator) { |
| this.sideEffects.setSack(initialValue, splitOperator, mergeOperator); |
| } |
| |
| @Override |
| public <S> Supplier<S> getSackInitialValue() { |
| return this.sideEffects.getSackInitialValue(); |
| } |
| |
| @Override |
| public <S> UnaryOperator<S> getSackSplitter() { |
| return this.sideEffects.getSackSplitter(); |
| } |
| |
| @Override |
| public <S> BinaryOperator<S> getSackMerger() { |
| return this.sideEffects.getSackMerger(); |
| } |
| |
| @Override |
| public TraversalSideEffects clone() { |
| try { |
| final MemoryTraversalSideEffects clone = (MemoryTraversalSideEffects) super.clone(); |
| clone.sideEffects = this.sideEffects.clone(); |
| return clone; |
| } catch (final CloneNotSupportedException e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public void mergeInto(final TraversalSideEffects sideEffects) { |
| this.sideEffects.mergeInto(sideEffects); |
| } |
| |
| public void storeSideEffectsInMemory() { |
| if (this.phase.workerState()) |
| this.sideEffects.forEach(this.memory::add); |
| else |
| this.sideEffects.forEach(this.memory::set); |
| } |
| |
| public static void setMemorySideEffects(final Traversal.Admin<?, ?> traversal, final Memory memory, final ProgramPhase phase) { |
| final TraversalSideEffects sideEffects = traversal.getSideEffects(); |
| if (!(sideEffects instanceof MemoryTraversalSideEffects)) { |
| traversal.setSideEffects(new MemoryTraversalSideEffects(sideEffects)); |
| } |
| final MemoryTraversalSideEffects memoryTraversalSideEffects = ((MemoryTraversalSideEffects) traversal.getSideEffects()); |
| memoryTraversalSideEffects.memory = memory; |
| memoryTraversalSideEffects.phase = phase; |
| } |
| |
| public static ProgramPhase getMemorySideEffectsPhase(final Traversal.Admin<?, ?> traversal) { |
| return traversal.getSideEffects() instanceof MemoryTraversalSideEffects ? |
| ((MemoryTraversalSideEffects)traversal.getSideEffects()).phase:null; |
| } |
| |
| public static Set<MemoryComputeKey> getMemoryComputeKeys(final Traversal.Admin<?, ?> traversal) { |
| final Set<MemoryComputeKey> keys = new HashSet<>(); |
| final TraversalSideEffects sideEffects = |
| traversal.getSideEffects() instanceof MemoryTraversalSideEffects ? |
| ((MemoryTraversalSideEffects) traversal.getSideEffects()).getSideEffects() : |
| traversal.getSideEffects(); |
| sideEffects.keys(). |
| stream(). |
| forEach(key -> keys.add(MemoryComputeKey.of(key, sideEffects.getReducer(key), true, false))); |
| return keys; |
| } |
| } |