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FuzzyMatcher

Struct FuzzyMatcher 

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pub struct FuzzyMatcher { /* private fields */ }
Expand description

Fuzzy matcher for semantic similarity-based retrieval.

Implements multiple similarity metrics (Jaccard, Levenshtein, containment) and combines entity matching, chunk content matching, and graph-based semantic expansion.

§Similarity Metrics

  • Jaccard: Word set overlap (40% weight)
  • Containment: Subset similarity (40% weight)
  • Levenshtein: Edit distance (20% weight)

§Matching Strategies

  1. Entity Matching: Match against entity names and types
  2. Chunk Matching: Match against document content
  3. Semantic Expansion: Traverse graph relationships

§Example

use graphrag_core::rograg::{FuzzyMatcher, FuzzyMatchConfig};

let config = FuzzyMatchConfig {
    similarity_threshold: 0.7,
    max_matches: 5,
    ..Default::default()
};

let matcher = FuzzyMatcher::with_config(config);
let result = matcher.match_query("query text", &graph)?;

Implementations§

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impl FuzzyMatcher

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pub fn new() -> FuzzyMatcher

Create a new fuzzy matcher with default configuration.

Uses default similarity threshold (0.6), max matches (10), and enables all matching strategies.

§Returns

Returns a FuzzyMatcher with default settings.

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pub fn with_config(config: FuzzyMatchConfig) -> FuzzyMatcher

Create a new fuzzy matcher with custom configuration.

§Arguments
  • config - Custom configuration for matching behavior
§Returns

Returns a FuzzyMatcher with the specified configuration.

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pub fn match_query( &self, query: &str, graph: &KnowledgeGraph, ) -> Result<FuzzyMatchResult, GraphRAGError>

Match a query against the knowledge graph using fuzzy semantic similarity.

Executes a multi-stage matching process:

  1. Direct entity name matching (exact and partial)
  2. Text chunk content matching
  3. Semantic expansion through graph relationships (if enabled)

Results are ranked by similarity and limited to max_matches.

§Arguments
  • query - The query text to match
  • graph - The knowledge graph to search
§Returns

Returns a FuzzyMatchResult containing matches, confidence scores, and generated content.

§Errors
  • FuzzyMatchError::InvalidGraph if the graph is empty
  • FuzzyMatchError::NoMatches if no matches exceed the similarity threshold
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pub fn get_config(&self) -> &FuzzyMatchConfig

Get the current configuration.

§Returns

Returns a reference to the current FuzzyMatchConfig.

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pub fn update_config(&mut self, config: FuzzyMatchConfig)

Update the matcher configuration.

§Arguments
  • config - New configuration to use
§Note

Configuration changes take effect immediately for subsequent queries.

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pub fn clear_cache(&self)

Clear the similarity computation cache.

Note: Caching is currently disabled for Arc compatibility.

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pub fn cache_stats(&self) -> (usize, usize)

Get cache statistics.

§Returns

Returns (hits, total) tuple. Currently always (0, 0) as caching is disabled.

Trait Implementations§

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impl Default for FuzzyMatcher

Available on crate feature rograg only.
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fn default() -> FuzzyMatcher

Returns the “default value” for a type. Read more

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Change the foreground color to black
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Change the background color to black
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Change the foreground color to red
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Change the foreground color to purple
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Change the background color to purple
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Change the foreground color to cyan
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Change the foreground color to bright green
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Change the background color to bright green
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Change the foreground color to bright yellow
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Change the background color to bright yellow
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Change the foreground color to bright magenta
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Change the foreground color to bright purple
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Make the text bold
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Make the text dim
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Make the text italicized
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Make the text underlined
Make the text blink
Make the text blink (but fast!)
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Swap the foreground and background colors
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Hide the text
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Cross out the text
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