Package dev.langchain4j.store.embedding.pgvector

Class DefaultMetadataStorageConfig

java.lang.Object

dev.langchain4j.store.embedding.pgvector.DefaultMetadataStorageConfig

All Implemented Interfaces:

MetadataStorageConfig

public class DefaultMetadataStorageConfig
extends Object
implements MetadataStorageConfig

Metadata configuration implementation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DefaultMetadataStorageConfig.DefaultMetadataStorageConfigBuilder

Constructor Summary

Constructors

Constructor	Description
DefaultMetadataStorageConfig()	Just for warnings ?
DefaultMetadataStorageConfig(MetadataStorageMode storageMode, List<String> columnDefinitions, List<String> indexes, String indexType)

Method Summary

Modifier and Type	Method	Description
static DefaultMetadataStorageConfig.DefaultMetadataStorageConfigBuilder	builder()
List<String>	columnDefinitions()	SQL definition of metadata field(s) list.
static MetadataStorageConfig	defaultConfig()	Default configuration
List<String>	indexes()	Metadata Indexes, list of fields to use as index.
String	indexType()	Index Type: BTREE (default) GIN ...
MetadataStorageMode	storageMode()	Metadata storage mode COMBINED_JSON: For dynamic metadata, when you don't know the list of metadata that will be used.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DefaultMetadataStorageConfig

public DefaultMetadataStorageConfig()

Just for warnings ?

DefaultMetadataStorageConfig

public DefaultMetadataStorageConfig(MetadataStorageMode storageMode,
 List<String> columnDefinitions,
 List<String> indexes,
 String indexType)

Method Details

defaultConfig

public static MetadataStorageConfig defaultConfig()

Default configuration

Returns:

Default configuration

builder

public static DefaultMetadataStorageConfig.DefaultMetadataStorageConfigBuilder builder()

storageMode

public MetadataStorageMode storageMode()

Description copied from interface: MetadataStorageConfig

Metadata storage mode

• COMBINED_JSON: For dynamic metadata, when you don't know the list of metadata that will be used.
• COMBINED_JSONB: Same as JSON, but stored in a binary way. Optimized for query on large dataset.
• COLUMN_PER_KEY: for static metadata, when you know in advance the list of metadata

Specified by:

storageMode in interface MetadataStorageConfig

Returns:

Metadata storage mode

columnDefinitions

public List<String> columnDefinitions()

Description copied from interface: MetadataStorageConfig

SQL definition of metadata field(s) list. Example:

• COMBINED_JSON: Collections.singletonList("metadata JSON NULL")
• COMBINED_JSONB: Collections.singletonList("metadata JSONB NULL")
• COLUMN_PER_KEY: Arrays.asList("condominium_id uuid null", "user uuid null")

Specified by:

columnDefinitions in interface MetadataStorageConfig

Returns:

list of column definitions

indexes

public List<String> indexes()

Description copied from interface: MetadataStorageConfig

Metadata Indexes, list of fields to use as index. Example:

• COMBINED_JSON: Collections.singletonList("metadata") or Arrays.asList("(metadata->'key')", "(metadata->'name')", "(metadata->'age')")
• COMBINED_JSONB: Collections.singletonList("metadata") or Arrays.asList("(metadata->'key')", "(metadata->'name')", "(metadata->'age')")
• COLUMN_PER_KEY: Arrays.asList("key", "name", "age")

Specified by:

indexes in interface MetadataStorageConfig

Returns:

Metadata Indexes list

indexType

public String indexType()

Description copied from interface: MetadataStorageConfig

Index Type:

• BTREE (default)
• GIN
• ... postgres indexes

Specified by:

indexType in interface MetadataStorageConfig

Returns:

Index Type