| /* |
| * 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.structure.io.binary.types; |
| |
| import org.apache.tinkerpop.gremlin.structure.io.binary.DataType; |
| import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader; |
| import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter; |
| import org.apache.tinkerpop.gremlin.process.traversal.Bytecode; |
| import org.apache.tinkerpop.gremlin.structure.io.Buffer; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| public class ByteCodeSerializer extends SimpleTypeSerializer<Bytecode> { |
| public ByteCodeSerializer() { |
| super(DataType.BYTECODE); |
| } |
| |
| @Override |
| protected Bytecode readValue(final Buffer buffer, final GraphBinaryReader context) throws IOException { |
| final Bytecode result = new Bytecode(); |
| |
| final int stepsLength = buffer.readInt(); |
| for (int i = 0; i < stepsLength; i++) { |
| result.addStep(context.readValue(buffer, String.class, false), getInstructionArguments(buffer, context)); |
| } |
| |
| final int sourcesLength = buffer.readInt(); |
| for (int i = 0; i < sourcesLength; i++) { |
| result.addSource(context.readValue(buffer, String.class, false), getInstructionArguments(buffer, context)); |
| } |
| |
| return result; |
| } |
| |
| private static Object[] getInstructionArguments(final Buffer buffer, final GraphBinaryReader context) throws IOException { |
| final int valuesLength = buffer.readInt(); |
| final Object[] values = new Object[valuesLength]; |
| for (int j = 0; j < valuesLength; j++) { |
| values[j] = context.read(buffer); |
| } |
| return values; |
| } |
| |
| @Override |
| protected void writeValue(final Bytecode value, final Buffer buffer, final GraphBinaryWriter context) throws IOException { |
| final List<Bytecode.Instruction> steps = value.getStepInstructions(); |
| final List<Bytecode.Instruction> sources = value.getSourceInstructions(); |
| // 2 buffers for the length + plus 2 buffers per each step and source |
| |
| writeInstructions(buffer, context, steps); |
| writeInstructions(buffer, context, sources); |
| } |
| |
| private void writeInstructions(final Buffer buffer, final GraphBinaryWriter context, |
| final List<Bytecode.Instruction> instructions) throws IOException { |
| |
| context.writeValue(instructions.size(), buffer, false); |
| |
| for (Bytecode.Instruction instruction : instructions) { |
| context.writeValue(instruction.getOperator(), buffer, false); |
| fillArgumentsBuffer(instruction.getArguments(), buffer, context); |
| } |
| } |
| |
| private static void fillArgumentsBuffer(final Object[] arguments, final Buffer buffer, final GraphBinaryWriter context) throws IOException { |
| |
| context.writeValue(arguments.length, buffer, false); |
| |
| for (Object value : arguments) { |
| context.write(value, buffer); |
| } |
| } |
| } |