| /* |
| * 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.driver.ser.binary.types.sample; |
| |
| import org.apache.tinkerpop.gremlin.driver.ser.SerializationException; |
| import org.apache.tinkerpop.gremlin.structure.io.Buffer; |
| 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.structure.io.binary.types.CustomTypeSerializer; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Date; |
| |
| /** |
| * A sample custom type serializer. |
| */ |
| public final class SamplePersonSerializer implements CustomTypeSerializer<SamplePerson> { |
| private final byte[] typeInfoBuffer = new byte[] { 0, 0, 0, 0 }; |
| |
| @Override |
| public String getTypeName() { |
| return "sampleProvider.SamplePerson"; |
| } |
| |
| @Override |
| public DataType getDataType() { |
| return DataType.CUSTOM; |
| } |
| |
| @Override |
| public SamplePerson read(final Buffer buffer, final GraphBinaryReader context) throws IOException { |
| // {custom type info}, {value_flag} and {value} |
| // No custom_type_info |
| if (buffer.readInt() != 0) { |
| throw new SerializationException("{custom_type_info} should not be provided for this custom type"); |
| } |
| |
| return readValue(buffer, context, true); |
| } |
| |
| @Override |
| public SamplePerson readValue(final Buffer buffer, final GraphBinaryReader context, final boolean nullable) throws IOException { |
| if (nullable) { |
| final byte valueFlag = buffer.readByte(); |
| if ((valueFlag & 1) == 1) { |
| return null; |
| } |
| } |
| |
| // Read the byte length of the value bytes |
| final int valueLength = buffer.readInt(); |
| |
| if (valueLength <= 0) { |
| throw new SerializationException(String.format("Unexpected value length: %d", valueLength)); |
| } |
| |
| if (valueLength > buffer.readableBytes()) { |
| throw new SerializationException( |
| String.format("Not enough readable bytes: %d (expected %d)", valueLength, buffer.readableBytes())); |
| } |
| |
| final String name = context.readValue(buffer, String.class, false); |
| final Date birthDate = context.readValue(buffer, Date.class, false); |
| |
| return new SamplePerson(name, birthDate); |
| } |
| |
| @Override |
| public void write(final SamplePerson value, final Buffer buffer, final GraphBinaryWriter context) throws IOException { |
| // Write {custom type info}, {value_flag} and {value} |
| buffer.writeBytes(typeInfoBuffer); |
| |
| writeValue(value, buffer, context, true); |
| } |
| |
| @Override |
| public void writeValue(final SamplePerson value, final Buffer buffer, final GraphBinaryWriter context, final boolean nullable) throws IOException { |
| if (value == null) { |
| if (!nullable) { |
| throw new SerializationException("Unexpected null value when nullable is false"); |
| } |
| |
| context.writeValueFlagNull(buffer); |
| return; |
| } |
| |
| if (nullable) { |
| context.writeValueFlagNone(buffer); |
| } |
| |
| final String name = value.getName(); |
| |
| // value_length = name_byte_length + name_bytes + long |
| buffer.writeInt(4 + name.getBytes(StandardCharsets.UTF_8).length + 8); |
| |
| context.writeValue(name, buffer, false); |
| context.writeValue(value.getBirthDate(), buffer, false); |
| } |
| } |