| /* |
| * 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.step.branch; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent; |
| import org.apache.tinkerpop.gremlin.process.traversal.lambda.ConstantTraversal; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| |
| import java.util.Collections; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class UnionStep<S, E> extends BranchStep<S, E, TraversalOptionParent.Pick> { |
| |
| public UnionStep(final Traversal.Admin traversal, final Traversal.Admin<?, E>... unionTraversals) { |
| super(traversal); |
| this.setBranchTraversal(new ConstantTraversal<>(Pick.any)); |
| for (final Traversal.Admin<?, E> union : unionTraversals) { |
| this.addGlobalChildOption(Pick.any, (Traversal.Admin) union); |
| } |
| } |
| |
| @Override |
| public void addGlobalChildOption(final Pick pickToken, final Traversal.Admin<S, E> traversalOption) { |
| if (Pick.any != pickToken) |
| throw new IllegalArgumentException("Union step only supports the any token: " + pickToken); |
| super.addGlobalChildOption(pickToken, traversalOption); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.stepString(this, this.traversalPickOptions.getOrDefault(Pick.any, Collections.emptyList())); |
| } |
| } |