Supporting Types

This document covers the supporting types used for Ollama model metadata and information.

OllamaModel

Represents an Ollama model with its basic metadata.

Class Signature

package dev.langchain4j.model.ollama;

public class OllamaModel

Mutability: Mutable (has setters)

Thread Safety: Not thread-safe; synchronize if shared across threads

Nullability: All fields can be null

Public Methods

Getters

public String getName()

Returns the model name.

Returns: String - Model name (e.g., "llama2", "mistral")

• May be null

public long getSize()

Returns the model size in bytes.

Returns: long - Model size

• Always >= 0

public String getDigest()

Returns the model's content digest (SHA256 hash).

Returns: String - SHA256 digest

• May be null

public OllamaModelDetails getDetails()

Returns the technical details of the model.

Returns: OllamaModelDetails - Model details

• May be null

public OffsetDateTime getModifiedAt()

Returns the last modification timestamp.

Returns: OffsetDateTime - Modification time

• May be null

OllamaModelDetails

Represents technical details about an Ollama model's architecture and quantization.

Class Signature

package dev.langchain4j.model.ollama;

public class OllamaModelDetails

Mutability: Mutable (has setters)

Thread Safety: Not thread-safe

Nullability: All fields can be null

Public Methods

public String getFormat()

Returns the model file format.

Returns: String - Format (e.g., "gguf", "ggml")

• May be null

public String getFamily()

Returns the model family.

Returns: String - Family name (e.g., "llama", "mistral")

• May be null

public String getParameterSize()

Returns the parameter size description.

Returns: String - Size (e.g., "7B", "13B", "70B")

• May be null

public String getQuantizationLevel()

Returns the quantization level.

Returns: String - Quantization (e.g., "Q4_0", "Q5_K_M", "F16")

• May be null

Common Quantization Levels

OllamaModelCard

Represents detailed information about an Ollama model including license, template, and capabilities.

Class Signature

package dev.langchain4j.model.ollama;

public class OllamaModelCard

Mutability: Mutable (has setters)

Thread Safety: Not thread-safe

Nullability: All fields can be null

Public Methods

public String getLicense()

Returns the model's license information.

Returns: String - License (e.g., "Apache 2.0", "MIT")

• May be null

public String getTemplate()

Returns the model's prompt template.

Returns: String - Template (e.g., "{{ .Prompt }}")

• May be null

public OllamaModelDetails getDetails()

Returns the technical details of the model.

Returns: OllamaModelDetails - Model details

• May be null

RunningOllamaModel

Represents a currently running Ollama model instance with runtime state information.

Class Signature

package dev.langchain4j.model.ollama;

public class RunningOllamaModel

Mutability: Mutable (has setters)

Thread Safety: Not thread-safe

Nullability: All fields can be null

Public Methods

public String getName()

Returns the name of the running model.

Returns: String - Model name (e.g., "llama2", "mistral")

• May be null

public String getModel()

Returns the full model identifier.

Returns: String - Model identifier

• May be null

public long getSize()

Returns the model size in bytes.

Returns: long - Model size in memory

• Always >= 0

public String getDigest()

Returns the model's content digest.

Returns: String - SHA256 digest

• May be null

public OllamaModelDetails getDetails()

Returns the technical details of the model.

Returns: OllamaModelDetails - Model details

• May be null

public OffsetDateTime getExpiresAt()

Returns when the model will be unloaded from memory.

Returns: OffsetDateTime - Expiration timestamp

• May be null if model persists indefinitely

See Also

• Model Management - Using these types for model management