/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package org.seasar.extension.jdbc.types;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.seasar.extension.jdbc.util.BindVariableUtil;
/**
* Enumの序数をJDBCで扱うためのクラスです。
*
* @author koichik
*/
public class EnumOrdinalType extends AbstractValueType {
@SuppressWarnings("unchecked")
private final Class<? extends Enum> enumClass;
/**
* インスタンスを構築します。
*
* @param enumClass
*/
@SuppressWarnings("unchecked")
public EnumOrdinalType(Class<? extends Enum> enumClass) {
super(Types.INTEGER);
this.enumClass = enumClass;
}
public Object getValue(ResultSet resultSet, int index) throws SQLException {
final int ordinal = resultSet.getInt(index);
if (ordinal == 0 && resultSet.wasNull()) {
return null;
}
return toEnum(ordinal);
}
public Object getValue(ResultSet resultSet, String columnName)
throws SQLException {
final int ordinal = resultSet.getInt(columnName);
if (ordinal == 0 && resultSet.wasNull()) {
return null;
}
return toEnum(ordinal);
}
public Object getValue(CallableStatement cs, int index) throws SQLException {
final int ordinal = cs.getInt(index);
if (ordinal == 0 && cs.wasNull()) {
return null;
}
return toEnum(ordinal);
}
public Object getValue(CallableStatement cs, String parameterName)
throws SQLException {
final int ordinal = cs.getInt(parameterName);
if (ordinal == 0 && cs.wasNull()) {
return null;
}
return toEnum(ordinal);
}
@SuppressWarnings("unchecked")
public void bindValue(PreparedStatement ps, int index, Object value)
throws SQLException {
if (value == null) {
setNull(ps, index);
} else {
ps.setInt(index, (Enum.class.cast(value)).ordinal());
}
}
@SuppressWarnings("unchecked")
public void bindValue(CallableStatement cs, String parameterName,
Object value) throws SQLException {
if (value == null) {
setNull(cs, parameterName);
} else {
cs.setInt(parameterName, (Enum.class.cast(value)).ordinal());
}
}
public String toText(Object value) {
if (value == null) {
return BindVariableUtil.nullText();
}
return BindVariableUtil.toText((Enum.class.cast(value)).ordinal());
}
/**
* {@link Enum}に変換します。
*
* @param ordinal
* 序数
* @return {@link Enum}
*/
@SuppressWarnings("unchecked")
protected Enum toEnum(int ordinal) {
return enumClass.getEnumConstants()[ordinal];
}
}