| /* |
| * 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.traverser; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Path; |
| import org.apache.tinkerpop.gremlin.process.traversal.Step; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSideEffects; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traverser; |
| import org.apache.tinkerpop.gremlin.structure.util.Attachable; |
| |
| import java.util.List; |
| import java.util.Set; |
| import java.util.function.Function; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class ProjectedTraverser<T, P> implements Traverser.Admin<T> { |
| |
| private Traverser.Admin<T> baseTraverser; |
| private List<P> projections; |
| |
| private ProjectedTraverser() { |
| // for serialization |
| } |
| |
| public ProjectedTraverser(final Traverser.Admin<T> baseTraverser, final List<P> projections) { |
| this.baseTraverser = baseTraverser; |
| this.projections = projections; |
| } |
| |
| public List<P> getProjections() { |
| return this.projections; |
| } |
| |
| @Override |
| public void merge(final Admin<?> other) { |
| this.baseTraverser.merge(other); |
| } |
| |
| @Override |
| public <R> Admin<R> split(final R r, final Step<T, R> step) { |
| return new ProjectedTraverser<>(this.baseTraverser.split(r, step), this.projections); |
| } |
| |
| @Override |
| public Admin<T> split() { |
| return new ProjectedTraverser<>(this.baseTraverser.split(), this.projections); |
| } |
| |
| @Override |
| public void addLabels(final Set<String> labels) { |
| this.baseTraverser.addLabels(labels); |
| } |
| |
| @Override |
| public void keepLabels(final Set<String> labels) { |
| this.baseTraverser.keepLabels(labels); |
| } |
| |
| @Override |
| public void dropLabels(final Set<String> labels) { |
| this.baseTraverser.dropLabels(labels); |
| } |
| |
| @Override |
| public void dropPath() { |
| this.baseTraverser.dropPath(); |
| } |
| |
| @Override |
| public void set(final T t) { |
| this.baseTraverser.set(t); |
| } |
| |
| @Override |
| public void incrLoops(final String stepLabel) { |
| this.baseTraverser.incrLoops(stepLabel); |
| } |
| |
| @Override |
| public void resetLoops() { |
| this.baseTraverser.resetLoops(); |
| } |
| |
| @Override |
| public String getStepId() { |
| return this.baseTraverser.getStepId(); |
| } |
| |
| @Override |
| public void setStepId(final String stepId) { |
| this.baseTraverser.setStepId(stepId); |
| } |
| |
| @Override |
| public void setBulk(final long count) { |
| this.baseTraverser.setBulk(count); |
| } |
| |
| @Override |
| public Admin<T> detach() { |
| this.baseTraverser = this.baseTraverser.detach(); |
| return this; |
| } |
| |
| @Override |
| public T attach(final Function<Attachable<T>, T> method) { |
| return this.baseTraverser.attach(method); |
| } |
| |
| @Override |
| public void setSideEffects(final TraversalSideEffects sideEffects) { |
| this.baseTraverser.setSideEffects(sideEffects); |
| } |
| |
| @Override |
| public TraversalSideEffects getSideEffects() { |
| return this.baseTraverser.getSideEffects(); |
| } |
| |
| @Override |
| public Set<String> getTags() { |
| return this.baseTraverser.getTags(); |
| } |
| |
| @Override |
| public T get() { |
| return this.baseTraverser.get(); |
| } |
| |
| @Override |
| public <S> S sack() { |
| return this.baseTraverser.sack(); |
| } |
| |
| @Override |
| public <S> void sack(final S object) { |
| this.baseTraverser.sack(object); |
| } |
| |
| @Override |
| public Path path() { |
| return this.baseTraverser.path(); |
| } |
| |
| @Override |
| public int loops() { |
| return this.baseTraverser.loops(); |
| } |
| |
| @Override |
| public long bulk() { |
| return this.baseTraverser.bulk(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.baseTraverser.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final Object object) { |
| return object instanceof ProjectedTraverser && ((ProjectedTraverser) object).baseTraverser.equals(this.baseTraverser); |
| } |
| |
| @Override |
| public String toString() { |
| return this.baseTraverser.toString(); |
| } |
| |
| @Override |
| public ProjectedTraverser<T, P> clone() { |
| try { |
| final ProjectedTraverser<T, P> clone = (ProjectedTraverser<T, P>) super.clone(); |
| clone.baseTraverser = (Traverser.Admin<T>) this.baseTraverser.clone(); |
| return clone; |
| } catch (final CloneNotSupportedException e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| |
| public static <T> Traverser.Admin<T> tryUnwrap(final Traverser.Admin<T> traverser) { |
| return traverser instanceof ProjectedTraverser ? ((ProjectedTraverser) traverser).baseTraverser : traverser; |
| } |
| } |