Package jakarta.servlet.jsp.jstl.sql

Interface Result

public interface Result

This interface represents the result of a <sql:query> action. It provides access to the following information in the query result:

  • The result rows (getRows() and getRowsByIndex())
  • The column names (getColumnNames())
  • The number of rows in the result (getRowCount())
  • An indication whether the rows returned represent the complete result or just a subset that is limited by a maximum row setting (isLimitedByMaxRows())

An implementation of the Result interface provides a disconnected view into the result of a query.

Author:
Justyna Horwat

  • Method Summary

    Modifier and Type
    Method
    Description
    String[]
    getColumnNames()
    Returns the names of the columns in the result.
    int
    getRowCount()
    Returns the number of rows in the cached ResultSet
    SortedMap[]
    getRows()
    Returns the result of the query as an array of SortedMap objects.
    Object[][]
    getRowsByIndex()
    Returns the result of the query as an array of arrays.
    boolean
    isLimitedByMaxRows()
    Returns true if the query was limited by a maximum row setting

  • Method Details

    • getRows

      SortedMap[] getRows()

      Returns the result of the query as an array of SortedMap objects. Each item of the array represents a specific row in the query result.

      A row is structured as a SortedMap object where the key is the column name, and where the value is the value associated with the column identified by the key. The column value is an Object of the Java type corresponding to the mapping between column types and Java types defined by the JDBC specification when the ResultSet.getObject() method is used.

      The SortedMap must use the Comparator java.util.String.CASE_INSENSITIVE_ORDER. This makes it possible to access the key as a case insensitive representation of a column name. This method will therefore work regardless of the case of the column name returned by the database.

      Returns:
      The result rows as an array of SortedMap objects

    • getRowsByIndex

      Object[][] getRowsByIndex()
      Returns the result of the query as an array of arrays. The first array dimension represents a specific row in the query result. The array elements for each row are Object instances of the Java type corresponding to the mapping between column types and Java types defined by the JDBC specification when the ResultSet.getObject() method is used.
      Returns:
      the result rows as an array of Object[] objects

    • getColumnNames

      String[] getColumnNames()
      Returns the names of the columns in the result. The order of the names in the array matches the order in which columns are returned in method getRowsByIndex().
      Returns:
      the column names as an array of String objects

    • getRowCount

      int getRowCount()
      Returns the number of rows in the cached ResultSet
      Returns:
      the number of rows in the result

    • isLimitedByMaxRows

      boolean isLimitedByMaxRows()
      Returns true if the query was limited by a maximum row setting
      Returns:
      true if the query was limited by a maximum row setting