Package dev.langchain4j.store.embedding.filter

Interface Filter

All Known Implementing Classes:

And, IsEqualTo, IsGreaterThan, IsGreaterThanOrEqualTo, IsIn, IsLessThan, IsLessThanOrEqualTo, IsNotEqualTo, IsNotIn, IsTextMatch, IsTextMatchPhrase, Not, Or

public interface Filter

This class represents a filter that can be applied during search in an EmbeddingStore.
Many EmbeddingStores support a feature called metadata filtering. A Filter can be used for this.
A Filter object can represent simple (e.g. type = 'documentation') and composite (e.g. type = 'documentation' AND year > 2020) filter expressions in an EmbeddingStore-agnostic way.
Each EmbeddingStore implementation that supports metadata filtering is mapping Filter into it's native filter expression.

See Also:

• IsEqualTo
• IsNotEqualTo
• IsGreaterThan
• IsGreaterThanOrEqualTo
• IsLessThan
• IsLessThanOrEqualTo
• IsIn
• IsNotIn
• And
• Not
• Or

Method Summary

Modifier and Type	Method	Description
default Filter	and(Filter filter)
static Filter	and(Filter left, Filter right)
static Filter	not(Filter expression)
default Filter	or(Filter filter)
static Filter	or(Filter left, Filter right)
boolean	test(Object object)	Tests if a given object satisfies this Filter.

Method Details

test

boolean test(Object object)

Tests if a given object satisfies this Filter.

Parameters:

object - An object to test.

Returns:

true if a given object satisfies this Filter, false otherwise.

and

default Filter and(Filter filter)

and

static Filter and(Filter left,
 Filter right)

or

default Filter or(Filter filter)

or

static Filter or(Filter left,
 Filter right)

not

static Filter not(Filter expression)