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Lightweight Object SQL Relational Mapping (OSRM)
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/*
* Copyright 2017 @objectsql.com
*
* 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 com.objectsql.handler;
import com.objectsql.exception.ORMException;
import com.objectsql.spring.SpringUtils;
import com.objectsql.support.DataType;
import com.objectsql.annotation.RdColumn;
import com.objectsql.query.QueryUtils;
import com.objectsql.support.ColumnInfo;
import com.objectsql.support.KV;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.sql.*;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.Date;
import java.util.TimeZone;
public class DefaultResultSetHandler implements ResultSetHandler {
@Override
public String decode(Class clazz, ColumnInfo info, Object value, ResultSet resultSet) {
if(info != null && info.getField() != null){
RdColumn column = info.getField().getAnnotation(RdColumn.class);
if(column != null){
return column.coding();
}
}
return "UTF-8";
}
@Override
public KV parseMap(ResultSetMetaData metaData, int index, Object obj, ResultSet rs) throws SQLException{
if(obj != null) {
// if (obj instanceof Timestamp) {
// obj = new Date(((Timestamp) obj).getTime());
// }else if(obj instanceof java.sql.Date){
// obj = new Date(((java.sql.Date)obj).getTime());
// }else if(metaData.getPrecision(index) == 15 && metaData.getScale(index) == 0) {
// if((obj instanceof Long) ){
// obj = new Date((Long)obj);
// }else if(obj instanceof BigDecimal){
// obj = new Date(((BigDecimal)obj).longValue());
// }
// }else
if(obj instanceof Clob){
StringBuffer sb = new StringBuffer();
Clob clob = (Clob) obj;
if(clob != null){
Reader reader = clob.getCharacterStream();
BufferedReader br = new BufferedReader(reader);
String s = null;
try {
while((s = br.readLine()) != null){
sb.append(s);
}
} catch (Exception e) {
}
}
obj = sb.toString();
}else if(obj instanceof Blob){
Blob blob = (Blob) obj;
InputStream stream = blob.getBinaryStream();
try {
byte[] temp = new byte[(int)blob.length()];
stream.read(temp);
stream.close();
obj = new String(temp, decode(null, null, obj, rs));
} catch (IOException e) {
e.printStackTrace();
}
}else if(obj instanceof byte[]){
try {
obj = new String((byte[])obj, decode(null, null, obj, rs));
} catch (IOException e) {
e.printStackTrace();
}
}
// else if(obj instanceof BigDecimal){
// obj = ((BigDecimal) obj).toPlainString();
// }else if(obj instanceof Double || obj instanceof Long || obj instanceof Float){
// obj = new BigDecimal(obj.toString()).toPlainString();
// }
String key = QueryUtils.displayNameOrAsName(metaData.getColumnLabel(index), metaData.getColumnName(index));
return new KV(key, obj);
}
return null;
}
@Override
public void handle(Object object, ColumnInfo info, Object value, ResultSet rs) throws SQLException {
if(object == null){
return;
}
Class clazz = object.getClass();
Object obj = null;
DataType type = DataType.getDataType(info.getType());
if(value != null){
switch (type) {
case BINARY:
if(value instanceof byte[]){
obj = value;
}else if(value instanceof Blob){
Blob blob = (Blob) value;
InputStream stream = blob.getBinaryStream();
byte[] temp = null;
try {
temp = new byte[(int)blob.length()];
stream.read(temp);
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
obj = temp;
}else{
obj = value;
}
break;
case STRING:
if(value instanceof Clob){
StringBuffer sb = new StringBuffer();
Clob clob = (Clob) value;
if(clob != null){
Reader reader = clob.getCharacterStream();
BufferedReader br = new BufferedReader(reader);
String s = null;
try {
while((s = br.readLine()) != null){
sb.append(s);
}
} catch (Exception e) {
}
}
obj = sb.toString();
}else if(value instanceof Blob){
Blob blob = (Blob) value;
InputStream stream = blob.getBinaryStream();
try {
byte[] temp = new byte[(int)blob.length()];
stream.read(temp);
stream.close();
String coding = decode(clazz, info, value, rs);
obj = new String(temp, coding);
} catch (IOException e) {
e.printStackTrace();
}
}else if(value instanceof byte[]){
try {
String coding = decode(clazz, info, value, rs);
obj = new String((byte[])value, coding);
} catch (IOException e) {
e.printStackTrace();
}
}else{
obj = value;
}
break;
case DATE:
if(value instanceof Long) {
Long ts = (Long) value;
if (ts != null && ts.longValue() > 0) {
obj = new Date(ts);
}
}else if(value instanceof java.sql.Date){
java.sql.Date tmp = (java.sql.Date) value;
obj = new Date(tmp.getTime());
}else if(value instanceof java.sql.Time){
obj = (Date)value;
}else if(value instanceof java.sql.Timestamp){
Timestamp ts = (Timestamp)value;
if(ts != null) {
obj = new Date(ts.getTime());
}
}else if(value instanceof BigDecimal){
BigDecimal ts = (BigDecimal)value;
if(ts != null) {
obj = new Date(ts.longValue());
}
}else if(value instanceof LocalDateTime) {
LocalDateTime ldt = (LocalDateTime) value;
int hour = TimeZone.getDefault().getRawOffset()/1000/3600;
obj = new Date((long)(ldt.toInstant(ZoneOffset.ofHours(hour)).toEpochMilli() * 1.0));
}else{
throw new ORMException("Handle date value not support now.");
}
break;
default:
if(value instanceof BigDecimal){
value = ((BigDecimal) value).toPlainString();
}else if(value instanceof Double
|| value instanceof Long
|| value instanceof Short
|| value instanceof Byte
|| value instanceof Boolean
|| value instanceof Float){
value = value.toString();
}
obj = SpringUtils.convertIfNecessary(info.getField(), value);
}
}
if(obj != null){
try {
info.getField().setAccessible(true);
info.getField().set(object, obj);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}