| /* |
| * 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.util; |
| |
| import org.apache.commons.configuration2.Configuration; |
| import org.apache.tinkerpop.gremlin.process.computer.util.VertexProgramHelper; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.structure.Graph; |
| |
| import java.io.Serializable; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class PureTraversal<S, E> implements Serializable, Cloneable { |
| |
| private Traversal.Admin<S, E> pureTraversal; |
| private transient Traversal.Admin<S, E> cachedTraversal; |
| |
| public PureTraversal(final Traversal.Admin<S, E> pureTraversal) { |
| this.pureTraversal = pureTraversal; |
| } |
| |
| public Traversal.Admin<S, E> getPure() { |
| return this.pureTraversal.clone(); |
| } |
| |
| public Traversal.Admin<S, E> get() { |
| if (null == this.cachedTraversal) |
| this.cachedTraversal = this.pureTraversal.clone(); |
| return this.cachedTraversal; |
| } |
| |
| public void storeState(final Configuration configuration, final String configurationKey) { |
| try { |
| VertexProgramHelper.serialize(this, configuration, configurationKey); // the traversal can not be serialized (probably because of lambdas). As such, try direct reference. |
| } catch (final IllegalArgumentException e) { |
| configuration.setProperty(configurationKey, this); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.pureTraversal.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final Object other) { |
| return other instanceof PureTraversal && this.pureTraversal.equals(((PureTraversal) other).pureTraversal); |
| } |
| |
| //////////// |
| |
| public static <S, E> void storeState(final Configuration configuration, final String configurationKey, final Traversal.Admin<S, E> traversal) { |
| new PureTraversal<>(traversal).storeState(configuration, configurationKey); |
| } |
| |
| public static <S, E> PureTraversal<S, E> loadState(final Configuration configuration, final String configurationKey, final Graph graph) { |
| final Object configValue = configuration.getProperty(configurationKey); |
| final PureTraversal<S, E> pureTraversal = (configValue instanceof String ? (PureTraversal<S, E>) VertexProgramHelper.deserialize(configuration, configurationKey) : ((PureTraversal<S, E>) configValue)); |
| pureTraversal.pureTraversal.setGraph(graph); |
| return pureTraversal; |
| } |
| |
| /////////// |
| |
| @Override |
| public String toString() { |
| return this.get().toString(); |
| } |
| |
| @Override |
| public PureTraversal<S, E> clone() { |
| try { |
| final PureTraversal<S, E> clone = (PureTraversal<S, E>) super.clone(); |
| clone.pureTraversal = this.pureTraversal.clone(); |
| clone.cachedTraversal = null; |
| return clone; |
| } catch (final CloneNotSupportedException e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| } |