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/*
* 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.dubbo.common.serialize.protobuf.support;
import org.apache.dubbo.common.serialize.ObjectOutput;
import org.apache.dubbo.common.serialize.protobuf.support.wrapper.MapValue;
import com.google.protobuf.BoolValue;
import com.google.protobuf.ByteString;
import com.google.protobuf.BytesValue;
import com.google.protobuf.DoubleValue;
import com.google.protobuf.FloatValue;
import com.google.protobuf.Int32Value;
import com.google.protobuf.Int64Value;
import com.google.protobuf.MessageLite;
import com.google.protobuf.StringValue;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import static org.apache.dubbo.common.constants.CommonConstants.HEARTBEAT_EVENT;
import static org.apache.dubbo.common.constants.CommonConstants.MOCK_HEARTBEAT_EVENT;
/**
* GenericGoogleProtobuf object output implementation
*/
public class GenericProtobufObjectOutput implements ObjectOutput {
private final OutputStream os;
public GenericProtobufObjectOutput(OutputStream os) {
this.os = os;
}
@Override
public void writeBool(boolean v) throws IOException {
writeObject(BoolValue.newBuilder().setValue(v).build());
}
@Override
public void writeByte(byte v) throws IOException {
writeObject(Int32Value.newBuilder().setValue((v)).build());
}
@Override
public void writeShort(short v) throws IOException {
writeObject(Int32Value.newBuilder().setValue(v).build());
}
@Override
public void writeInt(int v) throws IOException {
writeObject(Int32Value.newBuilder().setValue(v).build());
}
@Override
public void writeLong(long v) throws IOException {
writeObject(Int64Value.newBuilder().setValue(v).build());
}
@Override
public void writeFloat(float v) throws IOException {
writeObject(FloatValue.newBuilder().setValue(v).build());
}
@Override
public void writeDouble(double v) throws IOException {
writeObject(DoubleValue.newBuilder().setValue(v).build());
}
@Override
public void writeUTF(String v) throws IOException {
writeObject(StringValue.newBuilder().setValue(v).build());
}
@Override
public void writeBytes(byte[] b) throws IOException {
writeObject(BytesValue.newBuilder().setValue(ByteString.copyFrom(b)).build());
}
@Override
public void writeBytes(byte[] b, int off, int len) throws IOException {
writeObject(BytesValue.newBuilder().setValue(ByteString.copyFrom(b, off, len)).build());
}
@SuppressWarnings("unchecked")
@Override
public void writeObject(Object obj) throws IOException {
/**
* Protobuf does not allow writing of non-protobuf generated messages, including null value.
* Writing of null value from developers should be denied immediately by throwing exception.
*/
if (obj == null) {
throw new IllegalStateException("This serialization only supports google protobuf objects, " +
"please use com.google.protobuf.Empty instead if you want to transmit null values.");
// obj = ProtobufUtils.convertNullToEmpty();
}
if (!ProtobufUtils.isSupported(obj.getClass())) {
throw new IllegalArgumentException("This serialization only supports google protobuf objects, current object class is: " + obj.getClass().getName());
}
ProtobufUtils.serialize(obj, os);
os.flush();
}
@Override
public void writeEvent(Object data) throws IOException {
if (data == HEARTBEAT_EVENT) {
data = MOCK_HEARTBEAT_EVENT;
}
writeUTF((String) data);
}
@Override
public void writeThrowable(Object obj) throws IOException {
if (obj instanceof Throwable && !(obj instanceof MessageLite)) {
obj = ProtobufUtils.convertToThrowableProto((Throwable) obj);
}
ProtobufUtils.serialize(obj, os);
os.flush();
}
@Override
public void writeAttachments(Map attachments) throws IOException {
if (attachments == null) {
return;
}
Map stringAttachments = new HashMap<>();
attachments.forEach((k, v) -> stringAttachments.put(k, (String) v));
ProtobufUtils.serialize(MapValue.Map.newBuilder().putAllAttachments(stringAttachments).build(), os);
os.flush();
}
@Override
public void flushBuffer() throws IOException {
os.flush();
}
}