Java compile errors with named vectors

[nirmalavhcl]

Iam using latest versions of qdrant/java-client clode from qdrant github repo and built them using maven and

For our application vector database hybrid search needs, Iam trying to create a collection in Qdrant with named vectors for both dense and sparse vectors

Here is my sample Java program:-

                          QdrantClient client = new QdrantClient(QdrantGrpcClient.newBuilder("127.0.0.1", grpcPort, false).build());
			client
				.createCollectionAsync(
						CreateCollection.newBuilder()
							.setCollectionName(collectionName)
							.setVectorsConfig(VectorsConfig.newBuilder().setParamsMap(
									VectorParamsMap.newBuilder().putAllMap(Map.of(
											"image",
												VectorParams.newBuilder()
													.setSize(4)
													.setDistance(Distance.Dot)
													.build(),
											"text",
												VectorParams.newBuilder()
													.setSize(5)
													.setDistance(Distance.Cosine)
													 .build()))
									.build())
								.build())
						.build())
				.get();

When I build using java21/17, Iam getting this compilation error

error: cannot find symbol
VectorParamsMap.newBuilder().putAllMap(Map.of(
^
symbol: method of(String,VectorParams,String,VectorParams)
location: interface Map

I have tried creating just simple text dense vectors using putMap and that fails similarly on the putMap method.

When I just create a collection with sparse vector(which is always a named vector), the code compiles fine.
QdrantClient client = new QdrantClient(QdrantGrpcClient.newBuilder("127.0.0.1", grpcPort, false).build());
client
.createCollectionAsync(
CreateCollection.newBuilder()
.setCollectionName(collectionName)
.setSparseVectorsConfig(SparseVectorConfig.newBuilder()
.putMap("sparsevec",
SparseVectorParams.newBuilder()
.setModifier(Modifier.Idf)
.setIndex(SparseIndexConfig.newBuilder().setOnDisk(false).build())
.build())
.build())
.get();

Any ideas whats going wrong with named vectors (with dense vectors ) setVectorsConfig syntax ?

[generall]

cc @Anush008 🙏

[Anush008]

Hey @nirmalavhcl
Let me check.

[Anush008]

Can you try the code example at https://qdrant.tech/documentation/concepts/vectors/#named-vectors?

[nirmalavhcl]

I might have found the issue. You can see our environment compile flags was adding a minimal --release 8 flag and this might be too restrictive. For some reason shows Map.of method doesn't exist in Java 8

[Anush008]

Yeah. You can try using a HashMap in 8.

[nirmalavhcl]

While I was able to get the putAllMap to work, this code snippet is failing to compile(even after removing --release 8 flag). Here Iam creating a VectorsConfig with just one Map of string/VectorParams

		client
				.createCollectionAsync(
						CreateCollection.newBuilder()
							.setCollectionName(collectionName)
							.setVectorsConfig(VectorsConfig.newBuilder()
									.putMap("densevec", VectorParams.newBuilder().setDistance(distance).setSize(dimension).build())
									.build())
							.setSparseVectorsConfig(SparseVectorConfig.newBuilder()
									.putMap("sparsevec", SparseVectorParams.newBuilder().setModifier(Modifier.Idf).setIndex(SparseIndexConfig.newBuilder().setOnDisk(false).build()).build())
									.build())
						.build())
				.get();

This is the compile error
lotus\notes\addins\iqaddin\IQAddin.java:366: error: cannot find symbol
.putMap("densevec", VectorParams.newBuilder().setDistance(distance).setSize(dimension).build())
^
symbol: method putMap(String,VectorParams)
location: class Builder

[Anush008]

That too seems to run fine for me.
You can maybe continue to a Hashmap with only one entry.

[nirmalavhcl]

it is strange, since the putMap with the setSparseVectorsConfig() alone, without the dense setVectorsConfig did compile fine

[vlobus]

Hi, was it resolved? We're struggling when creating named vectors. We are able to set name for sparse vectors in Java with putMap but change vector name from default to "dense" is not possible. Looking for alternative to lovely Python:

    client.create_collection(
        collection_name=collection_name,
        vectors_config={"dense": VectorParams(size=dim_size, distance=Distance.COSINE)},
        sparse_vectors_config={"sparse": models.SparseVectorParams()},
        hnsw_config=HnswConfigDiff(on_disk=True, m=64, ef_construct=512)
    )

[nirmalavhcl]

yes, I was able to get the createcollection working with 2 named vectors. MAke sure you are using Java17/21 to build/

		client
				.createCollectionAsync(
						CreateCollection.newBuilder()
							.setCollectionName(collectionName)
							.setVectorsConfig(VectorsConfig.newBuilder().setParamsMap(VectorParamsMap.newBuilder().putAllMap(Map.of("densevec", VectorParams.newBuilder().setSize(dimension).setDistance(distance).build())).build())
									.build())
							.setSparseVectorsConfig(SparseVectorConfig.newBuilder().putMap("sparsevec", SparseVectorParams.newBuilder().setModifier(Modifier.Idf).setIndex(SparseIndexConfig.newBuilder().setOnDisk(false).build()).build())
									.build())
						.build())
				.get();

[novakma2]

Thanks, and so you insert both dense and sparse as named with insert without a default vector I guess.? Can you paste a point insert ? Cheers

[Anush008]

You can refer to https://qdrant.tech/documentation/concepts/vectors/#named-vectors for create collection and upsert code examples.