org.apache.pulsar.client.impl.schema.generic.GenericProtobufNativeReader Maven / Gradle / Ivy
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* distributed with this work for additional information
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* 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
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package org.apache.pulsar.client.impl.schema.generic;
import com.google.protobuf.Descriptors;
import com.google.protobuf.DynamicMessage;
import com.google.protobuf.InvalidProtocolBufferException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import org.apache.pulsar.client.api.SchemaSerializationException;
import org.apache.pulsar.client.api.schema.Field;
import org.apache.pulsar.client.api.schema.GenericRecord;
import org.apache.pulsar.client.api.schema.SchemaReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GenericProtobufNativeReader implements SchemaReader {
private final Descriptors.Descriptor descriptor;
private final byte[] schemaVersion;
private final List fields;
public GenericProtobufNativeReader(Descriptors.Descriptor descriptor) {
this(descriptor, null);
}
public GenericProtobufNativeReader(Descriptors.Descriptor descriptor, byte[] schemaVersion) {
try {
this.schemaVersion = schemaVersion;
this.descriptor = descriptor;
this.fields = descriptor.getFields()
.stream()
.map(f -> new Field(f.getName(), f.getIndex()))
.collect(Collectors.toList());
} catch (Exception e) {
log.error("GenericProtobufNativeReader init error", e);
throw new RuntimeException(e);
}
}
@Override
public GenericProtobufNativeRecord read(byte[] bytes, int offset, int length) {
try {
if (!(bytes.length == length && offset == 0)) { //skip unnecessary bytes copy
bytes = Arrays.copyOfRange(bytes, offset, offset + length);
}
return new GenericProtobufNativeRecord(schemaVersion, descriptor, fields,
DynamicMessage.parseFrom(descriptor, bytes));
} catch (InvalidProtocolBufferException e) {
throw new SchemaSerializationException(e);
}
}
@Override
public GenericProtobufNativeRecord read(InputStream inputStream) {
try {
return new GenericProtobufNativeRecord(schemaVersion, descriptor, fields,
DynamicMessage.parseFrom(descriptor, inputStream));
} catch (IOException e) {
throw new SchemaSerializationException(e);
}
}
@Override
public Optional