java.lang.Object
- com.amazonaws.athena.connector.validation.LambdaMetadataProvider

```
public class LambdaMetadataProvider
extends Object
```
This class offers multiple convenience methods to retrieve metadata from a deployed Lambda.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static GetSplitsResponse`	`getSplits(String catalog, TableName tableName, Constraints constraints, Block partitions, List<String> partitionCols, String contToken, String metadataFunction, FederatedIdentity identity)`	This method builds and executes a GetSplitsRequest against the specified Lambda function.
`static GetTableResponse`	`getTable(String catalog, TableName tableName, String metadataFunction, FederatedIdentity identity)`	This method builds and executes a GetTableRequest against the specified Lambda function.
`static GetTableLayoutResponse`	`getTableLayout(String catalog, TableName tableName, Constraints constraints, org.apache.arrow.vector.types.pojo.Schema schema, Set<String> partitionCols, String metadataFunction, FederatedIdentity identity)`	This method builds and executes a GetTableLayoutRequest against the specified Lambda function.
`static ListSchemasResponse`	`listSchemas(String catalog, String metadataFunction, FederatedIdentity identity)`	This method builds and executes a ListSchemasRequest against the specified Lambda function.
`static ListTablesResponse`	`listTables(String catalog, String schema, String metadataFunction, FederatedIdentity identity)`	This method builds and executes a ListTablesRequest against the specified Lambda function.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

listSchemas

public static ListSchemasResponse listSchemas(String catalog,
                                              String metadataFunction,
                                              FederatedIdentity identity)

This method builds and executes a ListSchemasRequest against the specified Lambda function.

Parameters:: catalog - the catalog name to be passed to Lambda; metadataFunction - the name of the Lambda function to call; identity - the identity of the caller
Returns:: the response

listTables

public static ListTablesResponse listTables(String catalog,
                                            String schema,
                                            String metadataFunction,
                                            FederatedIdentity identity)

This method builds and executes a ListTablesRequest against the specified Lambda function.

Parameters:: catalog - the catalog name to be passed to Lambda; schema - the name of the contextual schema for the request; metadataFunction - the name of the Lambda function to call; identity - the identity of the caller
Returns:: the response

getTable

public static GetTableResponse getTable(String catalog,
                                        TableName tableName,
                                        String metadataFunction,
                                        FederatedIdentity identity)

This method builds and executes a GetTableRequest against the specified Lambda function.

Parameters:: catalog - the catalog name to be passed to Lambda; tableName - the schema-qualified table name indicating which table should be retrieved; metadataFunction - the name of the Lambda function to call; identity - the identity of the caller
Returns:: the response

getTableLayout

public static GetTableLayoutResponse getTableLayout(String catalog,
                                                    TableName tableName,
                                                    Constraints constraints,
                                                    org.apache.arrow.vector.types.pojo.Schema schema,
                                                    Set<String> partitionCols,
                                                    String metadataFunction,
                                                    FederatedIdentity identity)

This method builds and executes a GetTableLayoutRequest against the specified Lambda function.

Parameters:: catalog - the catalog name to be passed to Lambda; tableName - the schema-qualified table name indicating the table whose layout should be retrieved; constraints - the constraints to be applied to the request; schema - the schema of the table in question; partitionCols - the partition column names for the table in question; metadataFunction - the name of the Lambda function to call; identity - the identity of the caller
Returns:: the response

getSplits

public static GetSplitsResponse getSplits(String catalog,
                                          TableName tableName,
                                          Constraints constraints,
                                          Block partitions,
                                          List<String> partitionCols,
                                          String contToken,
                                          String metadataFunction,
                                          FederatedIdentity identity)

This method builds and executes a GetSplitsRequest against the specified Lambda function.

Parameters:: catalog - the catalog name to be passed to Lambda; tableName - the schema-qualified table name indicating the table for which splits should be retrieved; constraints - the constraints to be applied to the request; partitions - the block of partitions to be provided with the request; partitionCols - the partition column names for the table in question; contToken - a continuation token to be provided with the request, or null; metadataFunction - the name of the Lambda function to call; identity - the identity of the caller
Returns:: the response

Class LambdaMetadataProvider