| /* |
| * 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.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource; |
| import org.apache.tinkerpop.gremlin.structure.Graph; |
| import org.apache.tinkerpop.gremlin.util.ScriptEngineCache; |
| |
| import javax.script.Bindings; |
| import javax.script.ScriptEngine; |
| import javax.script.ScriptException; |
| import java.io.Serializable; |
| import java.util.function.Function; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| * @deprecated As of release 3.2.0, replaced by {@link ScriptTraversal}. |
| */ |
| public final class TraversalScriptFunction<S, E> implements Function<Graph, Traversal.Admin<S, E>>, Serializable { |
| |
| private final TraversalSourceFactory traversalSourceFactory; |
| private final String scriptEngineName; |
| private final String traversalScript; |
| private final Object[] bindings; |
| |
| public TraversalScriptFunction(final TraversalSource traversalSource, final String scriptEngineName, final String traversalScript, final Object... bindings) { |
| this.traversalSourceFactory = new TraversalSourceFactory<>(traversalSource); |
| this.scriptEngineName = scriptEngineName; |
| this.traversalScript = traversalScript; |
| this.bindings = bindings; |
| if (this.bindings.length % 2 != 0) |
| throw new IllegalArgumentException("The provided key/value bindings array length must be a multiple of two"); |
| } |
| |
| public Traversal.Admin<S, E> apply(final Graph graph) { |
| try { |
| final ScriptEngine engine = ScriptEngineCache.get(this.scriptEngineName); |
| final Bindings engineBindings = engine.createBindings(); |
| engineBindings.put("g", this.traversalSourceFactory.createTraversalSource(graph)); |
| for (int i = 0; i < this.bindings.length; i = i + 2) { |
| engineBindings.put((String) this.bindings[i], this.bindings[i + 1]); |
| } |
| final Traversal.Admin<S, E> traversal = (Traversal.Admin<S, E>) engine.eval(this.traversalScript, engineBindings); |
| if (!traversal.isLocked()) traversal.applyStrategies(); |
| return traversal; |
| } catch (final ScriptException e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| |
| public String toString() { |
| return this.traversalScript; |
| } |
| } |