# Select API Quickstart Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

Traditional retrieval of objects is always as whole entities, i.e GetObject for a 5 GiB object, will always return 5 GiB of data. S3 Select API allows us to retrieve a subset of data by using simple SQL expressions. By using Select API to retrieve only the data needed by the application, drastic performance improvements can be achieved.

import com.google.common.util.concurrent.ListenableFutureTask;
import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.Executor;

/**
 * Computes or retrieves values, based on a key, for use in populating a {@link LoadingCache}.
 *
 * <p>Most implementations will only need to implement {@link #load}. Other methods may be
 * overridden as desired.
 *
 * <p>Usage example:
 *

                        .collect(Collectors.toList())).status(ApiResult.Status.OK).result());
    }

    /**
     * Retrieves a specific stemmer override dictionary item by ID.
     *
     * @param dictId the dictionary ID
     * @param id the ID of the stemmer override item to retrieve
     * @return JSON response containing the stemmer override dictionary item
     */

                .collect(Collectors.toList())).status(ApiResult.Status.OK).result());
    }

    /**
     * Retrieves a specific stopwords dictionary item by ID.
     *
     * @param dictId the dictionary ID
     * @param id the ID of the stopwords item to retrieve
     * @return JSON response containing the stopwords dictionary item
     */
    // GET /api/admin/dict/stopwords/setting/{dictId}/{id}

                        .total(pager.getAllRecordCount())
                        .status(ApiResult.Status.OK)
                        .result());
    }

    /**
     * Retrieves a specific bad word setting by ID.
     *
     * @param id the ID of the bad word to retrieve
     * @return JSON response containing the bad word configuration
     */
    // GET /api/admin/badword/{id}
    @Execute

        }
    }

    /**
     * Safely retrieves a value from a list at the specified index, handling bounds checking
     * and cleaning up quoted strings.
     *
     * @param list the list to retrieve the value from
     * @param index the index of the value to retrieve
     * @return the cleaned value at the specified index, or empty string if index is out of bounds
     */

     *
     * @return the file path as a string
     */
    @Override
    public String getPath() {
        return path;
    }

    /**
     * Retrieves a character mapping item by its ID.
     *
     * @param id the unique identifier of the mapping item to retrieve
     * @return an OptionalEntity containing the mapping item if found, empty otherwise
     */
    @Override

                .total(pager.getAllRecordCount())
                .status(Status.OK)
                .result());
    }

    /**
     * Retrieves a specific boost document rule setting by ID.
     *
     * @param id the ID of the boost document rule to retrieve
     * @return JSON response containing the boost document rule configuration
     */
    // GET /api/admin/boostdoc/setting/{id}
    @Execute

                        .status(ApiResult.Status.OK)
                        .result());
    }

    /**
     * Retrieves a specific web configuration setting by ID.
     *
     * @param id the ID of the web configuration setting to retrieve
     * @return JSON response containing the web configuration setting
     */
    // GET /api/admin/webconfig/setting/{id}
    @Execute

     * @param params the map containing field names as keys and configuration values as values
     */
    public FieldConfigs(final Map<String, String> params) {
        this.params = params;
    }

    /**
     * Retrieves the configuration for the specified field name.
     *
     * @param fieldName the name of the field to get configuration for
     * @return an OptionalThing containing the Config if the field exists and has a non-blank value,