Download the latest protoc from the https://github.com/protocolbuffers/protobuf/releases, depending on your machine download linux-x86_64.zip or osx-x86_64.zip or win64.zip bundle of protoc.
syntax = "proto2";
option java_package = "net.mahtabalam.protos";
option java_outer_classname = "RawDataResultProto";
message RawDataResult {
repeated Well wellResults = 1;
}
message Well {
optional string id = 1;
optional AlleleType alleleType = 2;
repeated double allele1 = 3;
repeated double allele2 = 4;
}
enum AlleleType {
HOMOZYGOUS = 0;
HETEROZYGOUS = 1;
}~/Downloads/protoc-29.2-win64/bin/protoc.exe --proto_path=src/main/java/proto/ --java_out=src/main/java/ src/main/java/proto/RawDataResult.proto
<dependencies>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>4.29.2</version>
</dependency>
</dependencies>First we create the RawDataResult instance and then serialize it and save it to file named raw_data_result.bin inside user's home directory under protobuf directory.
public class Serializer {
public static void main(String[] args) {
RawDataResult.Builder rawDataResultBuilder = RawDataResult.newBuilder();
for (int i = 1; i <= 96; i++) {
AlleleType alleleType = (i % 2 == 0) ? AlleleType.HOMOZYGOUS : AlleleType.HETEROZYGOUS;
Well well = createWell(String.valueOf(i), alleleType);
rawDataResultBuilder.addWellResults(well);
}
RawDataResult rawDataResult = rawDataResultBuilder.build();
System.out.println("RawDataResult :" + rawDataResult);
String userHome = System.getProperty("user.home");
// Define the file path in the ~/protobuf directory
String filePath = userHome + File.separator + "protobuf" + File.separator + "raw_data_result.bin";
File dir = new File(userHome + File.separator + "protobuf");
if (!dir.exists()) {
dir.mkdirs(); // Create the directory (and any necessary parent directories)
}
// Serialize the protobuf object to the file
try (FileOutputStream fos = new FileOutputStream(filePath)) {
rawDataResult.writeTo(fos);
System.out.println("Serialized RawDataResult to " + filePath);
} catch (IOException e) {
System.err.println("Failed to serialize RawDataResult: " + e.getMessage());
}
}
private static Well createWell(String id, AlleleType alleleType) {
Well.Builder wellBuilder = Well.newBuilder();
wellBuilder.setId(id);
wellBuilder.setAlleleType(alleleType);
// Add 10 values to allele1 and allele2
for (int i = 1; i <= 10; i++) {
wellBuilder.addAllele1(i * 0.9);
wellBuilder.addAllele2(i * 0.8);
}
return wellBuilder.build();
}
} cd ~/protobuf
ls -alh raw_data_result.bin
-rw-r--r-- 1 alamm 197121 18K Jan 8 12:06 raw_data_result.bin
public class Deserializer {
public static void main(String[] args) {
// Get the user's home directory and construct the file path
String userHome = System.getProperty("user.home");
String filePath = userHome + File.separator + "protobuf" + File.separator + "raw_data_result.bin";
RawDataResultProto.RawDataResult rawDataResult = deserializeRawDataResult(filePath);
if (rawDataResult != null) {
System.out.println("Deserialized RawDataResult: " + rawDataResult);
}
}
// Method to deserialize RawDataResult from a file
private static RawDataResultProto.RawDataResult deserializeRawDataResult(String filePath) {
RawDataResultProto.RawDataResult rawDataResult = null;
try (FileInputStream fis = new FileInputStream(filePath)) {
rawDataResult = RawDataResultProto.RawDataResult.parseFrom(fis);
System.out.println("Successfully deserialized RawDataResult from " + filePath);
} catch (IOException e) {
System.err.println("Failed to deserialize RawDataResult: " + e.getMessage());
}
return rawDataResult;
}
}In nodejs-protobuf-deserialization project, we deserialize the raw_data_result.bin using Node.js, so serialization and deserialization can be in different language provided that schema remains the same.