/*
* 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.io.Reader;
import java.io.StringReader;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.seasar.extension.jdbc.ValueType;
import org.seasar.extension.jdbc.util.BindVariableUtil;
import org.seasar.framework.util.ReaderUtil;
import org.seasar.framework.util.StringConversionUtil;
/**
* ClobをStringとして扱うための {@link ValueType}です。
*
* @author manhole
*/
public class StringClobType extends AbstractValueType {
/**
* インスタンスを構築します。
*/
public StringClobType() {
super(Types.CLOB);
}
public Object getValue(ResultSet resultSet, int index) throws SQLException {
return convertToString(resultSet.getCharacterStream(index));
}
public Object getValue(ResultSet resultSet, String columnName)
throws SQLException {
return convertToString(resultSet.getCharacterStream(columnName));
}
public Object getValue(CallableStatement cs, int index) throws SQLException {
return convertToString(cs.getClob(index));
}
public Object getValue(CallableStatement cs, String parameterName)
throws SQLException {
return convertToString(cs.getClob(parameterName));
}
/**
* 文字ストリームから読み込んだ文字列を返します。
*
* @param reader
* 文字ストリーム
* @return 文字ストリームから読み込んだ文字列
*/
protected String convertToString(Reader reader) {
if (reader == null) {
return null;
}
return ReaderUtil.readText(reader);
}
/**
* CLOBから読み込んだ文字列を返します。
*
* @param clob
* CLOB
* @return CLOBから読み込んだ文字列
* @throws SQLException
* SQL例外が発生した場合
*/
protected String convertToString(Clob clob) throws SQLException {
if (clob == null) {
return null;
}
return convertToString(clob.getCharacterStream());
}
public void bindValue(PreparedStatement ps, int index, Object value)
throws SQLException {
if (value == null) {
setNull(ps, index);
} else {
final String s = StringConversionUtil.toString(value);
ps.setCharacterStream(index, new StringReader(s), s.length());
}
}
public void bindValue(CallableStatement cs, String parameterName,
Object value) throws SQLException {
if (value == null) {
setNull(cs, parameterName);
} else {
final String s = StringConversionUtil.toString(value);
cs.setCharacterStream(parameterName, new StringReader(s), s
.length());
}
}
public String toText(Object value) {
if (value == null) {
return BindVariableUtil.nullText();
}
String var = StringConversionUtil.toString(value);
return BindVariableUtil.toText(var);
}
}