Compile and generate proto

src/main/java/org/ds/Main.java

@@ -4,4 +4,6 @@ public class Main {
     public static void main(String[] args) {
         System.out.println("Hello world!");
     }
-}
+}
\ No newline at end of file
+
+//./protoc --proto_path=src --java_out=.\src\main\java .\src\proto\student.proto
\ No newline at end of file

src/main/java/org/ds/proto/Student.java

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: proto/student.proto
+// Protobuf Java Version: 4.28.2
+
+package org.ds.proto;
+
+/**
+ * Protobuf type {@code Student}
+ */
+public final class Student extends
+    com.google.protobuf.GeneratedMessage implements
+    // @@protoc_insertion_point(message_implements:Student)
+    StudentOrBuilder {
+private static final long serialVersionUID = 0L;
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+      com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+      /* major= */ 4,
+      /* minor= */ 28,
+      /* patch= */ 2,
+      /* suffix= */ "",
+      Student.class.getName());
+  }
+  // Use Student.newBuilder() to construct.
+  private Student(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+    super(builder);
+  }
+  private Student() {
+    name_ = "";
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return org.ds.proto.StudentOuterClass.internal_static_Student_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return org.ds.proto.StudentOuterClass.internal_static_Student_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            org.ds.proto.Student.class, org.ds.proto.Student.Builder.class);
+  }
+
+  public static final int NAME_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object name_ = "";
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  @java.lang.Override
+  public java.lang.String getName() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      name_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString
+      getNameBytes() {
+    java.lang.Object ref = name_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (java.lang.String) ref);
+      name_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int AGE_FIELD_NUMBER = 2;
+  private int age_ = 0;
+  /**
+   * <code>int32 age = 2;</code>
+   * @return The age.
+   */
+  @java.lang.Override
+  public int getAge() {
+    return age_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(name_)) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 1, name_);
+    }
+    if (age_ != 0) {
+      output.writeInt32(2, age_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(name_)) {
+      size += com.google.protobuf.GeneratedMessage.computeStringSize(1, name_);
+    }
+    if (age_ != 0) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeInt32Size(2, age_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof org.ds.proto.Student)) {
+      return super.equals(obj);
+    }
+    org.ds.proto.Student other = (org.ds.proto.Student) obj;
+
+    if (!getName()
+        .equals(other.getName())) return false;
+    if (getAge()
+        != other.getAge()) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getName().hashCode();
+    hash = (37 * hash) + AGE_FIELD_NUMBER;
+    hash = (53 * hash) + getAge();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static org.ds.proto.Student parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Student parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Student parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Student parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Student parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Student parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Student parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input);
+  }
+  public static org.ds.proto.Student parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static org.ds.proto.Student parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static org.ds.proto.Student parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static org.ds.proto.Student parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input);
+  }
+  public static org.ds.proto.Student parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(org.ds.proto.Student prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code Student}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessage.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:Student)
+      org.ds.proto.StudentOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.ds.proto.StudentOuterClass.internal_static_Student_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.ds.proto.StudentOuterClass.internal_static_Student_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.ds.proto.Student.class, org.ds.proto.Student.Builder.class);
+    }
+
+    // Construct using org.ds.proto.Student.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      name_ = "";
+      age_ = 0;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return org.ds.proto.StudentOuterClass.internal_static_Student_descriptor;
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Student getDefaultInstanceForType() {
+      return org.ds.proto.Student.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Student build() {
+      org.ds.proto.Student result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Student buildPartial() {
+      org.ds.proto.Student result = new org.ds.proto.Student(this);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(org.ds.proto.Student result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.name_ = name_;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.age_ = age_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof org.ds.proto.Student) {
+        return mergeFrom((org.ds.proto.Student)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(org.ds.proto.Student other) {
+      if (other == org.ds.proto.Student.getDefaultInstance()) return this;
+      if (!other.getName().isEmpty()) {
+        name_ = other.name_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      if (other.getAge() != 0) {
+        setAge(other.getAge());
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              name_ = input.readStringRequireUtf8();
+              bitField0_ |= 0x00000001;
+              break;
+            } // case 10
+            case 16: {
+              age_ = input.readInt32();
+              bitField0_ |= 0x00000002;
+              break;
+            } // case 16
+            default: {
+              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.lang.Object name_ = "";
+    /**
+     * <code>string name = 1;</code>
+     * @return The name.
+     */
+    public java.lang.String getName() {
+      java.lang.Object ref = name_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        name_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return The bytes for name.
+     */
+    public com.google.protobuf.ByteString
+        getNameBytes() {
+      java.lang.Object ref = name_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        name_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setName(
+        java.lang.String value) {
+      if (value == null) { throw new NullPointerException(); }
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearName() {
+      name_ = getDefaultInstance().getName();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string name = 1;</code>
+     * @param value The bytes for name to set.
+     * @return This builder for chaining.
+     */
+    public Builder setNameBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) { throw new NullPointerException(); }
+      checkByteStringIsUtf8(value);
+      name_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    private int age_ ;
+    /**
+     * <code>int32 age = 2;</code>
+     * @return The age.
+     */
+    @java.lang.Override
+    public int getAge() {
+      return age_;
+    }
+    /**
+     * <code>int32 age = 2;</code>
+     * @param value The age to set.
+     * @return This builder for chaining.
+     */
+    public Builder setAge(int value) {
+
+      age_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>int32 age = 2;</code>
+     * @return This builder for chaining.
+     */
+    public Builder clearAge() {
+      bitField0_ = (bitField0_ & ~0x00000002);
+      age_ = 0;
+      onChanged();
+      return this;
+    }
+
+    // @@protoc_insertion_point(builder_scope:Student)
+  }
+
+  // @@protoc_insertion_point(class_scope:Student)
+  private static final org.ds.proto.Student DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new org.ds.proto.Student();
+  }
+
+  public static org.ds.proto.Student getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Student>
+      PARSER = new com.google.protobuf.AbstractParser<Student>() {
+    @java.lang.Override
+    public Student parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<Student> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Student> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public org.ds.proto.Student getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

src/main/java/org/ds/proto/StudentOrBuilder.java

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: proto/student.proto
+// Protobuf Java Version: 4.28.2
+
+package org.ds.proto;
+
+public interface StudentOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:Student)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string name = 1;</code>
+   * @return The name.
+   */
+  java.lang.String getName();
+  /**
+   * <code>string name = 1;</code>
+   * @return The bytes for name.
+   */
+  com.google.protobuf.ByteString
+      getNameBytes();
+
+  /**
+   * <code>int32 age = 2;</code>
+   * @return The age.
+   */
+  int getAge();
+}

src/main/java/org/ds/proto/StudentOuterClass.java

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: proto/student.proto
+// Protobuf Java Version: 4.28.2
+
+package org.ds.proto;
+
+public final class StudentOuterClass {
+  private StudentOuterClass() {}
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+      com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+      /* major= */ 4,
+      /* minor= */ 28,
+      /* patch= */ 2,
+      /* suffix= */ "",
+      StudentOuterClass.class.getName());
+  }
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistryLite registry) {
+  }
+
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions(
+        (com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_Students_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_Students_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_Student_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_Student_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static  com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n\023proto/student.proto\"&\n\010Students\022\032\n\010stu" +
+      "dents\030\001 \003(\0132\010.Student\"$\n\007Student\022\014\n\004name" +
+      "\030\001 \001(\t\022\013\n\003age\030\002 \001(\005B\020\n\014org.ds.protoP\001b\006p" +
+      "roto3"
+    };
+    descriptor = com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+        });
+    internal_static_Students_descriptor =
+      getDescriptor().getMessageTypes().get(0);
+    internal_static_Students_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+        internal_static_Students_descriptor,
+        new java.lang.String[] { "Students", });
+    internal_static_Student_descriptor =
+      getDescriptor().getMessageTypes().get(1);
+    internal_static_Student_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+        internal_static_Student_descriptor,
+        new java.lang.String[] { "Name", "Age", });
+    descriptor.resolveAllFeaturesImmutable();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}

src/main/java/org/ds/proto/Students.java

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: proto/student.proto
+// Protobuf Java Version: 4.28.2
+
+package org.ds.proto;
+
+/**
+ * Protobuf type {@code Students}
+ */
+public final class Students extends
+    com.google.protobuf.GeneratedMessage implements
+    // @@protoc_insertion_point(message_implements:Students)
+    StudentsOrBuilder {
+private static final long serialVersionUID = 0L;
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+      com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+      /* major= */ 4,
+      /* minor= */ 28,
+      /* patch= */ 2,
+      /* suffix= */ "",
+      Students.class.getName());
+  }
+  // Use Students.newBuilder() to construct.
+  private Students(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+    super(builder);
+  }
+  private Students() {
+    students_ = java.util.Collections.emptyList();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return org.ds.proto.StudentOuterClass.internal_static_Students_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return org.ds.proto.StudentOuterClass.internal_static_Students_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            org.ds.proto.Students.class, org.ds.proto.Students.Builder.class);
+  }
+
+  public static final int STUDENTS_FIELD_NUMBER = 1;
+  @SuppressWarnings("serial")
+  private java.util.List<org.ds.proto.Student> students_;
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<org.ds.proto.Student> getStudentsList() {
+    return students_;
+  }
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends org.ds.proto.StudentOrBuilder> 
+      getStudentsOrBuilderList() {
+    return students_;
+  }
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  @java.lang.Override
+  public int getStudentsCount() {
+    return students_.size();
+  }
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  @java.lang.Override
+  public org.ds.proto.Student getStudents(int index) {
+    return students_.get(index);
+  }
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  @java.lang.Override
+  public org.ds.proto.StudentOrBuilder getStudentsOrBuilder(
+      int index) {
+    return students_.get(index);
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    for (int i = 0; i < students_.size(); i++) {
+      output.writeMessage(1, students_.get(i));
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    for (int i = 0; i < students_.size(); i++) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(1, students_.get(i));
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof org.ds.proto.Students)) {
+      return super.equals(obj);
+    }
+    org.ds.proto.Students other = (org.ds.proto.Students) obj;
+
+    if (!getStudentsList()
+        .equals(other.getStudentsList())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (getStudentsCount() > 0) {
+      hash = (37 * hash) + STUDENTS_FIELD_NUMBER;
+      hash = (53 * hash) + getStudentsList().hashCode();
+    }
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static org.ds.proto.Students parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Students parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Students parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Students parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Students parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static org.ds.proto.Students parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static org.ds.proto.Students parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input);
+  }
+  public static org.ds.proto.Students parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  public static org.ds.proto.Students parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static org.ds.proto.Students parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static org.ds.proto.Students parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input);
+  }
+  public static org.ds.proto.Students parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(org.ds.proto.Students prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(
+      com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code Students}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessage.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:Students)
+      org.ds.proto.StudentsOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.ds.proto.StudentOuterClass.internal_static_Students_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.ds.proto.StudentOuterClass.internal_static_Students_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.ds.proto.Students.class, org.ds.proto.Students.Builder.class);
+    }
+
+    // Construct using org.ds.proto.Students.newBuilder()
+    private Builder() {
+
+    }
+
+    private Builder(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      super(parent);
+
+    }
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      if (studentsBuilder_ == null) {
+        students_ = java.util.Collections.emptyList();
+      } else {
+        students_ = null;
+        studentsBuilder_.clear();
+      }
+      bitField0_ = (bitField0_ & ~0x00000001);
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return org.ds.proto.StudentOuterClass.internal_static_Students_descriptor;
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Students getDefaultInstanceForType() {
+      return org.ds.proto.Students.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Students build() {
+      org.ds.proto.Students result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public org.ds.proto.Students buildPartial() {
+      org.ds.proto.Students result = new org.ds.proto.Students(this);
+      buildPartialRepeatedFields(result);
+      if (bitField0_ != 0) { buildPartial0(result); }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartialRepeatedFields(org.ds.proto.Students result) {
+      if (studentsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)) {
+          students_ = java.util.Collections.unmodifiableList(students_);
+          bitField0_ = (bitField0_ & ~0x00000001);
+        }
+        result.students_ = students_;
+      } else {
+        result.students_ = studentsBuilder_.build();
+      }
+    }
+
+    private void buildPartial0(org.ds.proto.Students result) {
+      int from_bitField0_ = bitField0_;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof org.ds.proto.Students) {
+        return mergeFrom((org.ds.proto.Students)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(org.ds.proto.Students other) {
+      if (other == org.ds.proto.Students.getDefaultInstance()) return this;
+      if (studentsBuilder_ == null) {
+        if (!other.students_.isEmpty()) {
+          if (students_.isEmpty()) {
+            students_ = other.students_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+          } else {
+            ensureStudentsIsMutable();
+            students_.addAll(other.students_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.students_.isEmpty()) {
+          if (studentsBuilder_.isEmpty()) {
+            studentsBuilder_.dispose();
+            studentsBuilder_ = null;
+            students_ = other.students_;
+            bitField0_ = (bitField0_ & ~0x00000001);
+            studentsBuilder_ = 
+              com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders ?
+                 getStudentsFieldBuilder() : null;
+          } else {
+            studentsBuilder_.addAllMessages(other.students_);
+          }
+        }
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+              org.ds.proto.Student m =
+                  input.readMessage(
+                      org.ds.proto.Student.parser(),
+                      extensionRegistry);
+              if (studentsBuilder_ == null) {
+                ensureStudentsIsMutable();
+                students_.add(m);
+              } else {
+                studentsBuilder_.addMessage(m);
+              }
+              break;
+            } // case 10
+            default: {
+              if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                done = true; // was an endgroup tag
+              }
+              break;
+            } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+    private int bitField0_;
+
+    private java.util.List<org.ds.proto.Student> students_ =
+      java.util.Collections.emptyList();
+    private void ensureStudentsIsMutable() {
+      if (!((bitField0_ & 0x00000001) != 0)) {
+        students_ = new java.util.ArrayList<org.ds.proto.Student>(students_);
+        bitField0_ |= 0x00000001;
+       }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilder<
+        org.ds.proto.Student, org.ds.proto.Student.Builder, org.ds.proto.StudentOrBuilder> studentsBuilder_;
+
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public java.util.List<org.ds.proto.Student> getStudentsList() {
+      if (studentsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(students_);
+      } else {
+        return studentsBuilder_.getMessageList();
+      }
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public int getStudentsCount() {
+      if (studentsBuilder_ == null) {
+        return students_.size();
+      } else {
+        return studentsBuilder_.getCount();
+      }
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public org.ds.proto.Student getStudents(int index) {
+      if (studentsBuilder_ == null) {
+        return students_.get(index);
+      } else {
+        return studentsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder setStudents(
+        int index, org.ds.proto.Student value) {
+      if (studentsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureStudentsIsMutable();
+        students_.set(index, value);
+        onChanged();
+      } else {
+        studentsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder setStudents(
+        int index, org.ds.proto.Student.Builder builderForValue) {
+      if (studentsBuilder_ == null) {
+        ensureStudentsIsMutable();
+        students_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        studentsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder addStudents(org.ds.proto.Student value) {
+      if (studentsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureStudentsIsMutable();
+        students_.add(value);
+        onChanged();
+      } else {
+        studentsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder addStudents(
+        int index, org.ds.proto.Student value) {
+      if (studentsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureStudentsIsMutable();
+        students_.add(index, value);
+        onChanged();
+      } else {
+        studentsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder addStudents(
+        org.ds.proto.Student.Builder builderForValue) {
+      if (studentsBuilder_ == null) {
+        ensureStudentsIsMutable();
+        students_.add(builderForValue.build());
+        onChanged();
+      } else {
+        studentsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder addStudents(
+        int index, org.ds.proto.Student.Builder builderForValue) {
+      if (studentsBuilder_ == null) {
+        ensureStudentsIsMutable();
+        students_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        studentsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder addAllStudents(
+        java.lang.Iterable<? extends org.ds.proto.Student> values) {
+      if (studentsBuilder_ == null) {
+        ensureStudentsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(
+            values, students_);
+        onChanged();
+      } else {
+        studentsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder clearStudents() {
+      if (studentsBuilder_ == null) {
+        students_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+      } else {
+        studentsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public Builder removeStudents(int index) {
+      if (studentsBuilder_ == null) {
+        ensureStudentsIsMutable();
+        students_.remove(index);
+        onChanged();
+      } else {
+        studentsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public org.ds.proto.Student.Builder getStudentsBuilder(
+        int index) {
+      return getStudentsFieldBuilder().getBuilder(index);
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public org.ds.proto.StudentOrBuilder getStudentsOrBuilder(
+        int index) {
+      if (studentsBuilder_ == null) {
+        return students_.get(index);  } else {
+        return studentsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public java.util.List<? extends org.ds.proto.StudentOrBuilder> 
+         getStudentsOrBuilderList() {
+      if (studentsBuilder_ != null) {
+        return studentsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(students_);
+      }
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public org.ds.proto.Student.Builder addStudentsBuilder() {
+      return getStudentsFieldBuilder().addBuilder(
+          org.ds.proto.Student.getDefaultInstance());
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public org.ds.proto.Student.Builder addStudentsBuilder(
+        int index) {
+      return getStudentsFieldBuilder().addBuilder(
+          index, org.ds.proto.Student.getDefaultInstance());
+    }
+    /**
+     * <code>repeated .Student students = 1;</code>
+     */
+    public java.util.List<org.ds.proto.Student.Builder> 
+         getStudentsBuilderList() {
+      return getStudentsFieldBuilder().getBuilderList();
+    }
+    private com.google.protobuf.RepeatedFieldBuilder<
+        org.ds.proto.Student, org.ds.proto.Student.Builder, org.ds.proto.StudentOrBuilder> 
+        getStudentsFieldBuilder() {
+      if (studentsBuilder_ == null) {
+        studentsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
+            org.ds.proto.Student, org.ds.proto.Student.Builder, org.ds.proto.StudentOrBuilder>(
+                students_,
+                ((bitField0_ & 0x00000001) != 0),
+                getParentForChildren(),
+                isClean());
+        students_ = null;
+      }
+      return studentsBuilder_;
+    }
+
+    // @@protoc_insertion_point(builder_scope:Students)
+  }
+
+  // @@protoc_insertion_point(class_scope:Students)
+  private static final org.ds.proto.Students DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new org.ds.proto.Students();
+  }
+
+  public static org.ds.proto.Students getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Students>
+      PARSER = new com.google.protobuf.AbstractParser<Students>() {
+    @java.lang.Override
+    public Students parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      Builder builder = newBuilder();
+      try {
+        builder.mergeFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(builder.buildPartial());
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(e)
+            .setUnfinishedMessage(builder.buildPartial());
+      }
+      return builder.buildPartial();
+    }
+  };
+
+  public static com.google.protobuf.Parser<Students> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<Students> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public org.ds.proto.Students getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

src/main/java/org/ds/proto/StudentsOrBuilder.java

+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: proto/student.proto
+// Protobuf Java Version: 4.28.2
+
+package org.ds.proto;
+
+public interface StudentsOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:Students)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  java.util.List<org.ds.proto.Student> 
+      getStudentsList();
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  org.ds.proto.Student getStudents(int index);
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  int getStudentsCount();
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  java.util.List<? extends org.ds.proto.StudentOrBuilder> 
+      getStudentsOrBuilderList();
+  /**
+   * <code>repeated .Student students = 1;</code>
+   */
+  org.ds.proto.StudentOrBuilder getStudentsOrBuilder(
+      int index);
+}

src/proto/student.proto

+syntax = "proto3";
+
+option java_multiple_files= true;
+option java_package = "org.ds.proto";
+
+message Students{
+    repeated Student students=1;
+}
+
+message Student{
+  string name =1;
+  int32 age =2;
+}