| /* |
| * 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.tinkergraph.structure.io.gryo; |
| |
| import org.apache.tinkerpop.gremlin.jsr223.JavaTranslator; |
| import org.apache.tinkerpop.gremlin.process.traversal.Bytecode; |
| import org.apache.tinkerpop.gremlin.process.traversal.Translator; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoMapper; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoReader; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoWriter; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| final class GryoTranslator<S extends TraversalSource, T extends Traversal.Admin<?, ?>> implements Translator.StepTranslator<S, T> { |
| |
| private final JavaTranslator<S, T> wrappedTranslator; |
| private final GryoMapper mapper = GryoMapper.build().create(); |
| private final GryoWriter writer = GryoWriter.build().mapper(mapper).create(); |
| private final GryoReader reader = GryoReader.build().mapper(mapper).create(); |
| |
| public GryoTranslator(final JavaTranslator<S, T> wrappedTranslator) { |
| this.wrappedTranslator = wrappedTranslator; |
| } |
| |
| @Override |
| public S getTraversalSource() { |
| return this.wrappedTranslator.getTraversalSource(); |
| } |
| |
| @Override |
| public T translate(final Bytecode bytecode) { |
| try { |
| final ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); |
| this.writer.writeObject(outputStream, bytecode); |
| return this.wrappedTranslator.translate(this.reader.readObject(new ByteArrayInputStream(outputStream.toByteArray()), Bytecode.class)); |
| } catch (final Exception e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public String getTargetLanguage() { |
| return this.wrappedTranslator.getTargetLanguage(); |
| } |
| } |