| /* |
| * 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.structure.Graph; |
| |
| import java.io.Serializable; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class TraversalClassFunction<S, E> implements Function<Graph, Traversal.Admin<S, E>>, Serializable { |
| |
| private final Class<? extends Supplier<Traversal.Admin<S, E>>> traversalSupplierClass; |
| |
| public TraversalClassFunction(final Class<? extends Supplier<Traversal.Admin<S, E>>> traversalSupplierClass) { |
| this.traversalSupplierClass = traversalSupplierClass; |
| } |
| |
| public Traversal.Admin<S, E> apply(final Graph graph) { |
| try { |
| final Traversal.Admin<S, E> traversal = this.traversalSupplierClass.getConstructor().newInstance().get(); |
| if (!traversal.isLocked()) { |
| traversal.setGraph(graph); |
| traversal.applyStrategies(); |
| } |
| return traversal; |
| } catch (final Exception e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| |
| public String toString() { |
| return this.traversalSupplierClass.getCanonicalName(); |
| } |
| } |