Package com.github.collinalpert.java2db.mappers

Class BaseMapper<E extends BaseEntity>

  • All Implemented Interfaces:
    Mappable<E>
    public class BaseMapper<E extends BaseEntity>
extends java.lang.Object
implements Mappable<E>
    Default mapper for converting a ResultSet to the respective Java entity.
    Author:
    Collin Alpert

    • Constructor Summary

      Constructors 
      Constructor Description
      BaseMapper​(java.lang.Class<E> clazz)  

    • Method Summary

      Modifier and Type Method Description
      java.util.Optional<E> map​(java.sql.ResultSet set, java.util.Map<java.lang.String,​java.lang.String> aliases)
      Maps a ResultSet with a single row to a Java entity.
      E[] mapToArray​(java.sql.ResultSet set, java.util.Map<java.lang.String,​java.lang.String> aliases)
      Maps a ResultSet with multiple rows to an array of Java entities.
      java.util.List<E> mapToList​(java.sql.ResultSet set, java.util.Map<java.lang.String,​java.lang.String> aliases)
      Maps a ResultSet with multiple rows to a list of Java entities.
      java.util.stream.Stream<E> mapToStream​(java.sql.ResultSet set, java.util.Map<java.lang.String,​java.lang.String> aliases)
      Maps a ResultSet with multiple rows to a Stream of Java entities.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • BaseMapper

        public BaseMapper​(java.lang.Class<E> clazz)

    • Method Detail

      • map

        public java.util.Optional<E> map​(java.sql.ResultSet set,
                                 java.util.Map<java.lang.String,​java.lang.String> aliases)
                          throws java.sql.SQLException
        Maps a ResultSet with a single row to a Java entity.
        Specified by:
        map in interface Mappable<E extends BaseEntity>
        Parameters:
        set - The ResultSet to map.
        aliases - A map of column aliases needed to retrieve column data from the ResultSet.
        Returns:
        An Optional which contains the Java entity if the query was successful.
        Throws:
        java.sql.SQLException - if the ResultSet.next() call does not work as expected or if the entity fields cannot be set.

      • mapToList

        public java.util.List<E> mapToList​(java.sql.ResultSet set,
                                   java.util.Map<java.lang.String,​java.lang.String> aliases)
                            throws java.sql.SQLException
        Maps a ResultSet with multiple rows to a list of Java entities.
        Specified by:
        mapToList in interface Mappable<E extends BaseEntity>
        Parameters:
        set - The ResultSet to map.
        aliases - A map of column aliases needed to retrieve column data from the ResultSet.
        Returns:
        A list of Java entities.
        Throws:
        java.sql.SQLException - if the ResultSet.next() call does not work as expected or if the entity fields cannot be set.

      • mapToStream

        public java.util.stream.Stream<E> mapToStream​(java.sql.ResultSet set,
                                              java.util.Map<java.lang.String,​java.lang.String> aliases)
                                       throws java.sql.SQLException
        Maps a ResultSet with multiple rows to a Stream of Java entities.
        Specified by:
        mapToStream in interface Mappable<E extends BaseEntity>
        Parameters:
        set - The ResultSet to map.
        aliases - A map of column aliases needed to retrieve column data from the ResultSet.
        Returns:
        A Stream of Java entities.
        Throws:
        java.sql.SQLException - if the ResultSet.next() call does not work as expected or if the entity fields cannot be set.

      • mapToArray

        public E[] mapToArray​(java.sql.ResultSet set,
                      java.util.Map<java.lang.String,​java.lang.String> aliases)
               throws java.sql.SQLException
        Maps a ResultSet with multiple rows to an array of Java entities.
        Specified by:
        mapToArray in interface Mappable<E extends BaseEntity>
        Parameters:
        set - The ResultSet to map.
        aliases - A map of column aliases needed to retrieve column data from the ResultSet.
        Returns:
        An array of Java entities.
        Throws:
        java.sql.SQLException - if the ResultSet.next() call does not work as expected or if the entity fields cannot be set.