001/* 002 * Copyright 2002-2013 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.jdbc.support.lob; 018 019import java.io.InputStream; 020import java.io.Reader; 021import java.sql.ResultSet; 022import java.sql.SQLException; 023 024import org.springframework.lang.Nullable; 025 026/** 027 * Abstract base class for {@link LobHandler} implementations. 028 * 029 * <p>Implements all accessor methods for column names through a column lookup 030 * and delegating to the corresponding accessor that takes a column index. 031 * 032 * @author Juergen Hoeller 033 * @since 1.2 034 * @see java.sql.ResultSet#findColumn 035 */ 036public abstract class AbstractLobHandler implements LobHandler { 037 038 @Override 039 @Nullable 040 public byte[] getBlobAsBytes(ResultSet rs, String columnName) throws SQLException { 041 return getBlobAsBytes(rs, rs.findColumn(columnName)); 042 } 043 044 @Override 045 @Nullable 046 public InputStream getBlobAsBinaryStream(ResultSet rs, String columnName) throws SQLException { 047 return getBlobAsBinaryStream(rs, rs.findColumn(columnName)); 048 } 049 050 @Override 051 @Nullable 052 public String getClobAsString(ResultSet rs, String columnName) throws SQLException { 053 return getClobAsString(rs, rs.findColumn(columnName)); 054 } 055 056 @Override 057 @Nullable 058 public InputStream getClobAsAsciiStream(ResultSet rs, String columnName) throws SQLException { 059 return getClobAsAsciiStream(rs, rs.findColumn(columnName)); 060 } 061 062 @Override 063 public Reader getClobAsCharacterStream(ResultSet rs, String columnName) throws SQLException { 064 return getClobAsCharacterStream(rs, rs.findColumn(columnName)); 065 } 066 067}