chore: normalize copyrights (#265)

**Description**

Normalize copyrights across repo.

**Checklist**

- [X] Code compiles correctly and linting passes locally

build.gradle

@@ -1,17 +1,6 @@
 /*
- * Copyright 2016 Dgraph Labs, Inc.
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar

settings.gradle

@@ -1,17 +1,6 @@
 /*
- * Copyright 2016 Dgraph Labs, Inc.
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 rootProject.name = 'dgraph4j'

src/main/java/io/dgraph/AsyncTransaction.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import io.dgraph.DgraphGrpc.DgraphStub;

src/main/java/io/dgraph/DgraphAsyncClient.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import static java.util.Arrays.asList;

src/main/java/io/dgraph/DgraphClient.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import io.dgraph.DgraphProto.Operation;

src/main/java/io/dgraph/DgraphException.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public class DgraphException extends RuntimeException {

src/main/java/io/dgraph/ExceptionUtil.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package io.dgraph;
 
 import io.grpc.Status;

src/main/java/io/dgraph/Helpers.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public class Helpers {

src/main/java/io/dgraph/StreamObserverBridge.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import io.grpc.stub.StreamObserver;

src/main/java/io/dgraph/Transaction.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import io.dgraph.DgraphProto.Mutation;

src/main/java/io/dgraph/TxnConflictException.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public class TxnConflictException extends TxnException {

src/main/java/io/dgraph/TxnException.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public abstract class TxnException extends RuntimeException {

src/main/java/io/dgraph/TxnFinishedException.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public class TxnFinishedException extends TxnException {

src/main/java/io/dgraph/TxnReadOnlyException.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 public class TxnReadOnlyException extends TxnException {

src/main/proto/api.proto

@@ -1,17 +1,6 @@
 /*
- * Copyright (C) 2023 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 // Style guide for Protocol Buffer 3.

src/test/java/io/dgraph/AcctUpsertTest.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import static org.testng.Assert.*;

src/test/java/io/dgraph/AclTest.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package io.dgraph;
 
 import static org.testng.Assert.*;

src/test/java/io/dgraph/BankTest.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import com.google.gson.Gson;

src/test/java/io/dgraph/ClientRandomStubTest.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package io.dgraph;
 
 import static org.testng.Assert.assertEquals;

src/test/java/io/dgraph/DeleteEdgeTest.java

@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2018 Dgraph Labs, Inc. and Contributors
- *
- * Licensed 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.
+ * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
  */
+
 package io.dgraph;
 
 import static org.testng.Assert.assertEquals;