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/*
* Copyright 2008 biaoping.yin
*
* 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.frameworkset.orm.adapter;
/*
*
* 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.
*/
import com.frameworkset.common.poolman.PreparedDBUtil;
import com.frameworkset.common.poolman.util.DBOptions;
import com.frameworkset.common.poolman.util.JDBCPoolMetaData;
import com.frameworkset.orm.platform.PlatformPostgresqlImpl;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* This is used to connect to PostgresQL databases.
*
* http://www.postgresql.org/
*
* @author Hakan Tandogan
* @author Henning P. Schmiedehausen
* @version $Id: DBPostgres.java,v 1.19 2005/05/08 15:56:49 tfischer Exp $
*/
public class DBPostgres extends DB {
/**
* A specialized date format for PostgreSQL.
*/
public static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
private SimpleDateFormat sdf = null;
// /**
// * Empty constructor.
// */
// protected DBPostgres()
// {
// sdf = new SimpleDateFormat(DATE_FORMAT);
// }
public DBPostgres() {
sdf = new SimpleDateFormat(DATE_FORMAT);
this.platform = new PlatformPostgresqlImpl();
}
/**
* This method is used to ignore case.
*
* @param in The string to transform to upper case.
* @return The upper case string.
*/
public String toUpperCase(String in) {
String s = new StringBuilder("UPPER(").append(in).append(")").toString();
return s;
}
/**
* This method is used to ignore case.
*
* @param in The string whose case to ignore.
* @return The string in a case that can be ignored.
*/
public String ignoreCase(String in) {
String s = new StringBuilder("UPPER(").append(in).append(")").toString();
return s;
}
/**
* @see com.frameworkset.orm.adapter.DB#getIDMethodType()
*/
public String getIDMethodType() {
return SEQUENCE;
}
/**
* @param name The name of the field (should be of type
* String).
* @return SQL to retreive the next database key.
* @see com.frameworkset.orm.adapter.DB#getIDMethodSQL(Object)
*/
public String getIDMethodSQL(Object name) {
return ("select nextval('" + name + "')");
}
/**
* Locks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to lock.
* @throws SQLException No Statement could be created or executed.
*/
public void lockTable(Connection con, String table) throws SQLException {
}
/**
* Unlocks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to unlock.
* @throws SQLException No Statement could be created or executed.
*/
public void unlockTable(Connection con, String table) throws SQLException {
}
/**
* This method is used to chek whether the database natively
* supports limiting the size of the resultset.
*
* @return True.
*/
public boolean supportsNativeLimit() {
return true;
}
/**
* This method is used to chek whether the database natively
* supports returning results starting at an offset position other
* than 0.
*
* @return True.
*/
public boolean supportsNativeOffset() {
return true;
}
/**
* This method is used to chek whether the database supports
* limiting the size of the resultset.
*
* @return LIMIT_STYLE_POSTGRES.
*/
public int getLimitStyle() {
return DB.LIMIT_STYLE_POSTGRES;
}
/**
* Override the default behavior to associate b with null?
*
* @see DB#getBooleanString(Boolean)
*/
public String getBooleanString(Boolean b) {
return (b == null) ? "FALSE" : (Boolean.TRUE.equals(b) ? "TRUE" : "FALSE");
}
/**
* This method overrides the JDBC escapes used to format dates
* using a DateFormat.
*
* This generates the timedate format defined in
* http://www.postgresql.org/docs/7.3/static/datatype-datetime.html
* which defined PostgreSQL dates as YYYY-MM-DD hh:mm:ss
*
* @param date the date to format
* @return The properly formatted date String.
*/
public String getDateString(Date date) {
StringBuilder dateBuf = new StringBuilder();
char delim = getStringDelimiter();
dateBuf.append(delim);
dateBuf.append(sdf.format(date));
dateBuf.append(delim);
return dateBuf.toString();
}
/**
* 获取指定数据的分页数据sql语句
*
* @param sql
* @return
*/
public PagineSql getDBPagineSql(String sql, long offset, int maxsize, boolean prepared) {
// return new StringBuilder(sql).append(" limit ").append(offset).append(",").append(maxsize).toString();
StringBuilder newsql = null;
if (prepared)
newsql = new StringBuilder().append(sql).append(" offset ? limit ?");
else
newsql = new StringBuilder().append(sql).append(" offset ").append(offset).append(" limit ").append(maxsize);
return new PagineSql(newsql.toString(), offset, (long) maxsize, offset, maxsize, prepared).setRebuilded(true);
}
public String getStringPagineSql(String sql) {
StringBuilder newsql = new StringBuilder().append(sql).append(" offset ? limit ?");
return newsql.toString();
}
public String getStringPagineSql(String schema, String tablename, String pkname, String columns) {
StringBuilder sqlbuilder = new StringBuilder();
sqlbuilder.append("SELECT ");
if (columns != null && !columns.equals("")) {
sqlbuilder.append(columns);
} else
sqlbuilder.append("* ");
sqlbuilder.append(" from ");
if (schema != null && !schema.equals(""))
sqlbuilder.append(schema).append(".");
sqlbuilder.append(tablename);
sqlbuilder.append(" offset ? limit ?");
return sqlbuilder.toString();
}
/**
* 获取指定数据的分页数据sql语句
*
* @param sql
* @return
*/
public PagineSql getDBPagineSql(String sql, long offset, int maxsize, boolean prepared, String orderBy) {
// return new StringBuilder(sql).append(" limit ").append(offset).append(",").append(maxsize).toString();
StringBuilder newsql = null;
if (prepared)
newsql = new StringBuilder().append(sql).append(" ").append(orderBy).append(" offset ? limit ?");
else
newsql = new StringBuilder().append(sql).append(" ").append(orderBy).append(" offset ").append(offset).append(" limit ").append(maxsize);
return new PagineSql(newsql.toString(), offset, (long) maxsize, offset, maxsize, prepared).setRebuilded(true);
}
public String getStringPagineSql(String sql, String orderBy) {
StringBuilder newsql = new StringBuilder().append(sql).append(" ").append(orderBy).append(" offset ? limit ?");
return newsql.toString();
}
public String getStringPagineSql(String schema, String tablename, String pkname, String columns, String orderBy) {
StringBuilder sqlbuilder = new StringBuilder();
sqlbuilder.append("SELECT ");
if (columns != null && !columns.equals("")) {
sqlbuilder.append(columns);
} else
sqlbuilder.append("* ");
sqlbuilder.append(" from ");
if (schema != null && !schema.equals(""))
sqlbuilder.append(schema).append(".");
sqlbuilder.append(tablename);
sqlbuilder.append(" ").append(orderBy).append(" offset ? limit ?");
return sqlbuilder.toString();
}
@Override
public void handleConnection(Integer fetchSize, Connection con) throws SQLException {
if (fetchSize != null && fetchSize > 0) {
if(con.getAutoCommit())
con.setAutoCommit(false);
}
return;
}
@Override
public void recoverConnection(Integer fetchSize, Connection con,boolean oldautocommit) throws SQLException {
if (fetchSize != null && fetchSize > 0) {
con.setAutoCommit(oldautocommit);
}
return ;
}
@Override
public void setObject(PreparedStatement statement, PreparedStatement statement_count, int parameterIndex, Object x) throws SQLException {
if (x != null) {
if (x instanceof Date) {
Timestamp timestamp = new Timestamp(((Date) x).getTime());
statement.setTimestamp(parameterIndex, timestamp);
if (statement_count != null) {
statement_count.setTimestamp(parameterIndex, timestamp);
}
} else if (x instanceof java.sql.Date) {
statement.setDate(parameterIndex, (java.sql.Date) x);
if (statement_count != null) {
statement_count.setDate(parameterIndex, (java.sql.Date) x);
}
} else if (x instanceof Timestamp) {
statement.setTimestamp(parameterIndex, (Timestamp) x);
if (statement_count != null) {
statement_count.setTimestamp(parameterIndex, (Timestamp) x);
}
} else if (x instanceof Short) {
statement.setShort(parameterIndex, (Short) x);
if (statement_count != null) {
statement_count.setShort(parameterIndex, (Short) x);
}
} else if (x instanceof Double) {
statement.setDouble(parameterIndex, (Double) x);
if (statement_count != null) {
statement_count.setDouble(parameterIndex, (Double) x);
}
} else if (x instanceof Float) {
statement.setFloat(parameterIndex, (Float) x);
if (statement_count != null) {
statement_count.setFloat(parameterIndex, (Float) x);
}
} else {
statement.setObject(parameterIndex, x);
if (statement_count != null) {
statement_count.setObject(parameterIndex, x);
}
}
} else {
statement.setNull(parameterIndex, Types.NULL);
if (statement_count != null) {
statement_count.setNull(parameterIndex, Types.NULL);
}
}
}
@Override
public void setObject(PreparedDBUtil dbutil, int parameterIndex, Object x) throws SQLException {
if (x != null) {
if (x instanceof String ) {
dbutil.setString(parameterIndex, (String) x);
} else if (x instanceof Date) {
Timestamp timestamp = new Timestamp(((Date) x).getTime());
dbutil.setTimestamp(parameterIndex, timestamp);
} else if (x instanceof java.sql.Date) {
dbutil.setDate(parameterIndex, (java.sql.Date) x);
} else if (x instanceof Timestamp) {
dbutil.setTimestamp(parameterIndex, (Timestamp) x);
} else if (x instanceof Short) {
dbutil.setShort(parameterIndex, (Short) x);
} else if (x instanceof Double) {
dbutil.setDouble(parameterIndex, (Double) x);
} else if (x instanceof Float) {
dbutil.setFloat(parameterIndex, (Float) x);
} else {
dbutil._setObject(parameterIndex, x);
}
} else {
dbutil.setNull(parameterIndex, Types.NULL);
}
}
public Integer getFetchSize(DBOptions dbOptions, JDBCPoolMetaData jdbcPoolMetaData){
Integer fetchsize = null;
if(dbOptions != null && dbOptions.getFetchSize() != null && dbOptions.getFetchSize() != 0){
fetchsize = dbOptions.getFetchSize();
}
// else{
// fetchsize = jdbcPoolMetaData.getQueryfetchsize();
// }
return fetchsize;
}
public String getSchemaTableTableName(JDBCPoolMetaData info, String tablename) {
return tablename;
}
public String getSchema(JDBCPoolMetaData info,Connection con) {
if(con == null)
return DB.NULL_SCHEMA;
try {
return con.getSchema();
} catch (SQLException e) {
// throw new RuntimeException(e);
return DB.NULL_SCHEMA;
}
}
}