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Mapping Row=> Bean and deserialization
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45 changes: 45 additions & 0 deletions
45
astra-db-java/src/test/java/com/datastax/astra/test/unit/DataApiVectorSerializationTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| package com.datastax.astra.test.unit; | ||
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| import com.datastax.astra.client.core.options.DataAPIClientOptions; | ||
| import com.datastax.astra.client.core.vector.DataAPIVector; | ||
| import com.datastax.astra.internal.serdes.tables.RowSerializer; | ||
| import org.junit.jupiter.api.Test; | ||
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| import java.time.Instant; | ||
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| import static org.assertj.core.api.AssertionsForClassTypes.assertThat; | ||
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| public class DataApiVectorSerializationTest { | ||
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| @Test | ||
| public void binarySerialization() { | ||
| byte[] bytes = "hello".getBytes(); | ||
| RowSerializer serializer = new RowSerializer(); | ||
| String json = serializer.marshall(bytes); | ||
| // {"$binary":"aGVsbG8="} | ||
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| System.out.println(json); | ||
| byte[] bytes2 = serializer.unMarshallBean(json, byte[].class); | ||
| assertThat(new String(bytes2)).isEqualTo("hello"); | ||
| } | ||
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| @Test | ||
| public void testVectorSerialization() { | ||
| DataAPIClientOptions.getSerdesOptions().encodeDataApiVectorsAsBase64(true);; | ||
| RowSerializer serializer = new RowSerializer(); | ||
| DataAPIVector vector = new DataAPIVector(new float[]{0.4f, -0.6f, 0.2f}); | ||
| System.out.println(serializer.marshall(vector)); | ||
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| String json1 = "{\"$binary\":\"PszMzb8ZmZo+TMzN\"}"; | ||
| DataAPIVector vector2 = serializer.unMarshallBean(json1, DataAPIVector.class); | ||
| System.out.println(vector2.getEmbeddings()); | ||
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| String json2 = "[0.4, -0.6, 0.2]"; | ||
| } | ||
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| @Test | ||
| public void serializationInstant() { | ||
| String sample = "2024-12-04T15:04:07.203Z"; | ||
| Instant.parse(sample); | ||
| } | ||
| } |
50 changes: 50 additions & 0 deletions
50
examples/src/main/java/com/datastax/astra/client/tables/FindOne.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,50 @@ | ||
| package com.datastax.astra.client.tables; | ||
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| import com.datastax.astra.client.DataAPIClients; | ||
| import com.datastax.astra.client.core.query.Filter; | ||
| import com.datastax.astra.client.core.query.Sort; | ||
| import com.datastax.astra.client.core.vector.DataAPIVector; | ||
| import com.datastax.astra.client.databases.Database; | ||
| import com.datastax.astra.client.tables.commands.options.TableFindOneOptions; | ||
| import com.datastax.astra.client.tables.definition.rows.Row; | ||
| import com.datastax.astra.internal.serdes.tables.RowSerializer; | ||
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| import java.util.Optional; | ||
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| import static com.datastax.astra.client.core.query.Filters.and; | ||
| import static com.datastax.astra.client.core.query.Filters.eq; | ||
| import static com.datastax.astra.client.core.query.Filters.gt; | ||
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| public class FindOne { | ||
| public static void main(String[] args) { | ||
| Database db = DataAPIClients.localDbWithDefaultKeyspace(); | ||
| // Database astraDb = new DataAPIClient(token).getDatabase(endpoint); | ||
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| Table<Row> table = db.getTable("games"); | ||
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| Filter filter = and( | ||
| eq("match_id", "mtch_0"), | ||
| gt("round", 1), | ||
| eq("winner", "Victor")); | ||
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| TableFindOneOptions options = new TableFindOneOptions() | ||
| //.projection(include("match_id", "winner", "field3")) | ||
| .sort(Sort.vector("m_vector", new DataAPIVector(new float[] {0.4f, -0.6f, 0.2f}))) | ||
| .includeSimilarity(true); | ||
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| Optional<Row> row = table.findOne(filter, options); | ||
| row.ifPresent(r -> { | ||
| System.out.println("Row: " + r); | ||
| DataAPIVector v = r.getVector("m_vector"); | ||
| System.out.println(r.getInstant("when")); | ||
| }); | ||
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| Table<Game> tableGame = db.getTable("games", Game.class); | ||
| Optional<Game> row2 = tableGame.findOne(filter, options); | ||
| row2.ifPresent(game -> { | ||
| System.out.println("game: " + game.getVector().dimension()); | ||
| System.out.println(game.getFighters()); | ||
| System.out.println(game.getMatchId()); | ||
| }); | ||
| } | ||
| } |
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