package org.skife.jdbi.v2.util;
import org.skife.jdbi.v2.StatementContext;
import org.skife.jdbi.v2.tweak.ResultColumnMapper;
import java.sql.ResultSet;
import java.sql.SQLException;
public abstract class EnumColumnMapper<E extends Enum<E>> implements ResultColumnMapper<E> {
EnumColumnMapper() {}
public static <E extends Enum<E>> ResultColumnMapper<E> byName(Class<E> type) {
return new ByName<E>(type);
}
public static <E extends Enum<E>> ResultColumnMapper<E> byOrdinal(Class<E> type) {
return new ByOrdinal<E>(type);
}
private static class ByName<E extends Enum<E>> extends EnumColumnMapper<E> {
private final Class<E> type;
private ByName(Class<E> type) {
this.type = type;
}
@Override
public E mapColumn(ResultSet r, int columnNumber, StatementContext ctx) throws SQLException {
String name = r.getString(columnNumber);
return name == null ? null : Enum.valueOf(type, name);
}
@Override
public E mapColumn(ResultSet r, String columnLabel, StatementContext ctx) throws SQLException {
String name = r.getString(columnLabel);
return name == null ? null : Enum.valueOf(type, name);
}
}
private static class ByOrdinal<E extends Enum<E>> extends EnumColumnMapper<E> {
private final E[] constants;
private ByOrdinal(Class<E> type) {
this.constants = type.getEnumConstants();
}
@Override
public E mapColumn(ResultSet r, int columnNumber, StatementContext ctx) throws SQLException {
int ordinal = r.getInt(columnNumber);
return r.wasNull() ? null : constants[ordinal];
}
@Override
public E mapColumn(ResultSet r, String columnLabel, StatementContext ctx) throws SQLException {
int ordinal = r.getInt(columnLabel);
return r.wasNull() ? null : constants[ordinal];
}
}
}