| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.sqoop.lib; |
| |
| import java.math.BigDecimal; |
| import java.sql.Date; |
| import java.sql.PreparedStatement; |
| import java.sql.ResultSet; |
| import java.sql.SQLException; |
| import java.sql.Time; |
| import java.sql.Timestamp; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| |
| /** |
| * Contains a set of methods which can read db columns from a ResultSet into |
| * Java types, and do serialization of these types to/from DataInput/DataOutput |
| * for use with Hadoop's Writable implementation. This supports null values |
| * for all types. |
| */ |
| public final class JdbcWritableBridge { |
| |
| // Currently, cap BLOB/CLOB objects at 16 MB until we can use external |
| // storage. |
| public static final long MAX_BLOB_LENGTH = 16 * 1024 * 1024; |
| public static final long MAX_CLOB_LENGTH = 16 * 1024 * 1024; |
| |
| private JdbcWritableBridge() { |
| } |
| |
| public static Integer readInteger(int colNum, ResultSet r) |
| throws SQLException { |
| int val; |
| val = r.getInt(colNum); |
| if (r.wasNull()) { |
| return null; |
| } else { |
| return Integer.valueOf(val); |
| } |
| } |
| |
| public static Long readLong(int colNum, ResultSet r) throws SQLException { |
| long val; |
| val = r.getLong(colNum); |
| if (r.wasNull()) { |
| return null; |
| } else { |
| return Long.valueOf(val); |
| } |
| } |
| |
| public static String readString(int colNum, ResultSet r) throws SQLException { |
| return r.getString(colNum); |
| } |
| |
| public static Float readFloat(int colNum, ResultSet r) throws SQLException { |
| float val; |
| val = r.getFloat(colNum); |
| if (r.wasNull()) { |
| return null; |
| } else { |
| return Float.valueOf(val); |
| } |
| } |
| |
| public static Double readDouble(int colNum, ResultSet r) throws SQLException { |
| double val; |
| val = r.getDouble(colNum); |
| if (r.wasNull()) { |
| return null; |
| } else { |
| return Double.valueOf(val); |
| } |
| } |
| |
| public static Boolean readBoolean(int colNum, ResultSet r) |
| throws SQLException { |
| boolean val; |
| val = r.getBoolean(colNum); |
| if (r.wasNull()) { |
| return null; |
| } else { |
| return Boolean.valueOf(val); |
| } |
| } |
| |
| public static Time readTime(int colNum, ResultSet r) throws SQLException { |
| return r.getTime(colNum); |
| } |
| |
| public static Timestamp readTimestamp(int colNum, ResultSet r) |
| throws SQLException { |
| return r.getTimestamp(colNum); |
| } |
| |
| public static Date readDate(int colNum, ResultSet r) throws SQLException { |
| return r.getDate(colNum); |
| } |
| |
| public static BytesWritable readBytesWritable(int colNum, ResultSet r) |
| throws SQLException { |
| byte [] bytes = r.getBytes(colNum); |
| return bytes == null ? null : new BytesWritable(bytes); |
| } |
| |
| public static BigDecimal readBigDecimal(int colNum, ResultSet r) |
| throws SQLException { |
| return r.getBigDecimal(colNum); |
| } |
| |
| public static BlobRef readBlobRef(int colNum, ResultSet r) |
| throws SQLException { |
| // Loading of BLOBs is delayed; handled by LargeObjectLoader. |
| return null; |
| } |
| |
| public static ClobRef readClobRef(int colNum, ResultSet r) |
| throws SQLException { |
| // Loading of CLOBs is delayed; handled by LargeObjectLoader. |
| return null; |
| } |
| |
| public static void writeInteger(Integer val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setInt(paramIdx, val); |
| } |
| } |
| |
| public static void writeLong(Long val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setLong(paramIdx, val); |
| } |
| } |
| |
| public static void writeDouble(Double val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setDouble(paramIdx, val); |
| } |
| } |
| |
| public static void writeBoolean(Boolean val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setBoolean(paramIdx, val); |
| } |
| } |
| |
| public static void writeFloat(Float val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setFloat(paramIdx, val); |
| } |
| } |
| |
| public static void writeString(String val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setString(paramIdx, val); |
| } |
| } |
| |
| public static void writeTimestamp(Timestamp val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setTimestamp(paramIdx, val); |
| } |
| } |
| |
| public static void writeTime(Time val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setTime(paramIdx, val); |
| } |
| } |
| |
| public static void writeDate(Date val, int paramIdx, int sqlType, |
| PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setDate(paramIdx, val); |
| } |
| } |
| |
| public static void writeBytesWritable(BytesWritable val, int paramIdx, |
| int sqlType, PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| // val.getBytes() is only valid in [0, len) |
| byte [] rawBytes = val.getBytes(); |
| int len = val.getLength(); |
| byte [] outBytes = new byte[len]; |
| System.arraycopy(rawBytes, 0, outBytes, 0, len); |
| s.setBytes(paramIdx, outBytes); |
| } |
| } |
| |
| public static void writeBigDecimal(BigDecimal val, int paramIdx, |
| int sqlType, PreparedStatement s) throws SQLException { |
| if (null == val) { |
| s.setNull(paramIdx, sqlType); |
| } else { |
| s.setBigDecimal(paramIdx, val); |
| } |
| } |
| |
| public static void writeBlobRef(org.apache.sqoop.lib.BlobRef val, |
| int paramIdx, int sqlType, PreparedStatement s) throws SQLException { |
| // TODO: support this. |
| throw new RuntimeException("Unsupported: Cannot export BLOB data"); |
| } |
| |
| public static void writeClobRef(org.apache.sqoop.lib.ClobRef val, |
| int paramIdx, int sqlType, PreparedStatement s) throws SQLException { |
| // TODO: support this. |
| throw new RuntimeException("Unsupported: Cannot export CLOB data"); |
| } |
| } |