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MySQL JDBC Type 4 driver
/*
Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.jdbc;
import java.io.InputStream;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.sql.NClob;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLXML;
import java.sql.Struct;
import java.sql.SQLFeatureNotSupportedException;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Field;
import com.mysql.jdbc.NotUpdatable;
import com.mysql.jdbc.ResultSetImpl;
import com.mysql.jdbc.RowData;
import com.mysql.jdbc.SQLError;
import com.mysql.jdbc.Statement;
public class JDBC4ResultSet extends ResultSetImpl {
public JDBC4ResultSet(long updateCount, long updateID, MySQLConnection conn, StatementImpl creatorStmt) {
super(updateCount, updateID, conn, creatorStmt);
}
public JDBC4ResultSet(String catalog, Field[] fields, RowData tuples, MySQLConnection conn, StatementImpl creatorStmt) throws SQLException {
super(catalog, fields, tuples, conn, creatorStmt);
}
/**
* JDBC 4.0
*
*
* Get the value of a column in the current row as a java.io.Reader.
*
*
* @param columnIndex
* the column to get the value from
*
* @return the value in the column as a java.io.Reader.
*
* @throws SQLException
* if an error occurs
*/
public Reader getNCharacterStream(int columnIndex) throws SQLException {
checkColumnBounds(columnIndex);
String fieldEncoding = this.fields[columnIndex - 1].getEncoding();
if (fieldEncoding == null || !fieldEncoding.equals("UTF-8")) {
throw new SQLException("Can not call getNCharacterStream() when field's charset isn't UTF-8");
}
return getCharacterStream(columnIndex);
}
/**
* JDBC 4.0
*
*
* Get the value of a column in the current row as a java.io.Reader.
*
*
* @param columnName
* the column name to retrieve the value from
*
* @return the value as a java.io.Reader
*
* @throws SQLException
* if an error occurs
*/
public Reader getNCharacterStream(String columnName) throws SQLException {
return getNCharacterStream(findColumn(columnName));
}
/**
* JDBC 4.0 Get a NCLOB column.
*
* @param i
* the first column is 1, the second is 2, ...
*
* @return an object representing a NCLOB
*
* @throws SQLException
* if an error occurs
*/
public NClob getNClob(int columnIndex) throws SQLException {
checkColumnBounds(columnIndex);
String fieldEncoding = this.fields[columnIndex - 1].getEncoding();
if (fieldEncoding == null || !fieldEncoding.equals("UTF-8")) {
throw new SQLException("Can not call getNClob() when field's charset isn't UTF-8");
}
if (!this.isBinaryEncoded) {
String asString = getStringForNClob(columnIndex);
if (asString == null) {
return null;
}
return new com.mysql.jdbc.JDBC4NClob(asString, getExceptionInterceptor());
}
return getNativeNClob(columnIndex);
}
/**
* JDBC 4.0 Get a NCLOB column.
*
* @param colName
* the column name
*
* @return an object representing a NCLOB
*
* @throws SQLException
* if an error occurs
*/
public NClob getNClob(String columnName) throws SQLException {
return getNClob(findColumn(columnName));
}
/**
* JDBC 4.0 Get a NCLOB column.
*
* @param columnIndex
* the first column is 1, the second is 2, ...
*
* @return an object representing a NCLOB
*
* @throws SQLException
* if an error occurs
*/
protected java.sql.NClob getNativeNClob(int columnIndex) throws SQLException {
String stringVal = getStringForNClob(columnIndex);
if (stringVal == null) {
return null;
}
return getNClobFromString(stringVal, columnIndex);
}
private String getStringForNClob(int columnIndex) throws SQLException {
String asString = null;
String forcedEncoding = "UTF-8";
try {
byte[] asBytes = null;
if (!this.isBinaryEncoded) {
asBytes = getBytes(columnIndex);
} else {
asBytes = getNativeBytes(columnIndex, true);
}
if (asBytes != null) {
asString = new String(asBytes, forcedEncoding);
}
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException("Unsupported character encoding " + forcedEncoding, SQLError.SQL_STATE_ILLEGAL_ARGUMENT,
getExceptionInterceptor());
}
return asString;
}
private final java.sql.NClob getNClobFromString(String stringVal, int columnIndex) throws SQLException {
return new com.mysql.jdbc.JDBC4NClob(stringVal, getExceptionInterceptor());
}
/**
* JDBC 4.0
*
* Get the value of a column in the current row as a Java String
*
* @param columnIndex
* the first column is 1, the second is 2...
*
* @return the column value, null for SQL NULL
*
* @exception SQLException
* if a database access error occurs
*/
public String getNString(int columnIndex) throws SQLException {
checkColumnBounds(columnIndex);
String fieldEncoding = this.fields[columnIndex - 1].getEncoding();
if (fieldEncoding == null || !fieldEncoding.equals("UTF-8")) {
throw new SQLException("Can not call getNString() when field's charset isn't UTF-8");
}
return getString(columnIndex);
}
/**
* JDBC 4.0
*
* The following routines simply convert the columnName into a columnIndex
* and then call the appropriate routine above.
*
* @param columnName
* is the SQL name of the column
*
* @return the column value
*
* @exception SQLException
* if a database access error occurs
*/
public String getNString(String columnName) throws SQLException {
return getNString(findColumn(columnName));
}
/**
* JDBC 4.0 Update a column with a character stream value. The updateXXX()
* methods are used to update column values in the current row, or the
* insert row. The updateXXX() methods do not update the underlying
* database, instead the updateRow() or insertRow() methods are called to
* update the database.
*
* @param columnIndex
* the first column is 1, the second is 2, ...
* @param x
* the new column value
* @param length
* the length of the stream
*
* @exception SQLException
* if a database-access error occurs
* @throws NotUpdatable
*/
public void updateNCharacterStream(int columnIndex, Reader x, int length) throws SQLException {
throw new NotUpdatable();
}
/**
* JDBC 4.0 Update a column with a character stream value. The updateXXX()
* methods are used to update column values in the current row, or the
* insert row. The updateXXX() methods do not update the underlying
* database, instead the updateRow() or insertRow() methods are called to
* update the database.
*
* @param columnName
* the name of the column
* @param reader
* the stream to update the column with
* @param length
* of the stream
*
* @throws SQLException
* if a database-access error occurs
*/
public void updateNCharacterStream(String columnName, Reader reader, int length) throws SQLException {
updateNCharacterStream(findColumn(columnName), reader, length);
}
/**
* @see ResultSet#updateNClob(String, NClob)
*/
public void updateNClob(String columnName, NClob nClob) throws SQLException {
updateNClob(findColumn(columnName), nClob);
}
public void updateRowId(int columnIndex, RowId x) throws SQLException {
throw new NotUpdatable();
}
public void updateRowId(String columnName, RowId x) throws SQLException {
updateRowId(findColumn(columnName), x);
}
public int getHoldability() throws SQLException {
throw SQLError.createSQLFeatureNotSupportedException();
}
public RowId getRowId(int columnIndex) throws SQLException {
throw SQLError.createSQLFeatureNotSupportedException();
}
public RowId getRowId(String columnLabel) throws SQLException {
return getRowId(findColumn(columnLabel));
}
public SQLXML getSQLXML(int columnIndex) throws SQLException {
checkColumnBounds(columnIndex);
return new JDBC4MysqlSQLXML(this, columnIndex, getExceptionInterceptor());
}
public SQLXML getSQLXML(String columnLabel) throws SQLException {
return getSQLXML(findColumn(columnLabel));
}
public void updateAsciiStream(int columnIndex, InputStream x) throws SQLException {
throw new NotUpdatable();
}
public void updateAsciiStream(String columnLabel, InputStream x) throws SQLException {
updateAsciiStream(findColumn(columnLabel), x);
}
public void updateAsciiStream(int columnIndex, InputStream x, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateAsciiStream(String columnLabel, InputStream x, long length) throws SQLException {
updateAsciiStream(findColumn(columnLabel), x, length);
}
public void updateBinaryStream(int columnIndex, InputStream x) throws SQLException {
throw new NotUpdatable();
}
public void updateBinaryStream(String columnLabel, InputStream x) throws SQLException {
updateBinaryStream(findColumn(columnLabel), x);
}
public void updateBinaryStream(int columnIndex, InputStream x, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateBinaryStream(String columnLabel, InputStream x, long length) throws SQLException {
updateBinaryStream(findColumn(columnLabel), x, length);
}
public void updateBlob(int columnIndex, InputStream inputStream) throws SQLException {
throw new NotUpdatable();
}
public void updateBlob(String columnLabel, InputStream inputStream) throws SQLException {
updateBlob(findColumn(columnLabel), inputStream);
}
public void updateBlob(int columnIndex, InputStream inputStream, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateBlob(String columnLabel, InputStream inputStream, long length) throws SQLException {
updateBlob(findColumn(columnLabel), inputStream, length);
}
public void updateCharacterStream(int columnIndex, Reader x) throws SQLException {
throw new NotUpdatable();
}
public void updateCharacterStream(String columnLabel, Reader reader) throws SQLException {
updateCharacterStream(findColumn(columnLabel), reader);
}
public void updateCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
updateCharacterStream(findColumn(columnLabel), reader, length);
}
public void updateClob(int columnIndex, Reader reader) throws SQLException {
throw new NotUpdatable();
}
public void updateClob(String columnLabel, Reader reader) throws SQLException {
updateClob(findColumn(columnLabel), reader);
}
public void updateClob(int columnIndex, Reader reader, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateClob(String columnLabel, Reader reader, long length) throws SQLException {
updateClob(findColumn(columnLabel), reader, length);
}
public void updateNCharacterStream(int columnIndex, Reader x) throws SQLException {
throw new NotUpdatable();
}
public void updateNCharacterStream(String columnLabel, Reader reader) throws SQLException {
updateNCharacterStream(findColumn(columnLabel), reader);
}
public void updateNCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateNCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
updateNCharacterStream(findColumn(columnLabel), reader, length);
}
public void updateNClob(int columnIndex, NClob nClob) throws SQLException {
throw new NotUpdatable();
}
public void updateNClob(int columnIndex, Reader reader) throws SQLException {
throw new NotUpdatable();
}
public void updateNClob(String columnLabel, Reader reader) throws SQLException {
updateNClob(findColumn(columnLabel), reader);
}
public void updateNClob(int columnIndex, Reader reader, long length) throws SQLException {
throw new NotUpdatable();
}
public void updateNClob(String columnLabel, Reader reader, long length) throws SQLException {
updateNClob(findColumn(columnLabel), reader, length);
}
public void updateNString(int columnIndex, String nString) throws SQLException {
throw new NotUpdatable();
}
public void updateNString(String columnLabel, String nString) throws SQLException {
updateNString(findColumn(columnLabel), nString);
}
public void updateSQLXML(int columnIndex, SQLXML xmlObject) throws SQLException {
throw new NotUpdatable();
}
public void updateSQLXML(String columnLabel, SQLXML xmlObject) throws SQLException {
updateSQLXML(findColumn(columnLabel), xmlObject);
}
/**
* Returns true if this either implements the interface argument or is directly or indirectly a wrapper
* for an object that does. Returns false otherwise. If this implements the interface then return true,
* else if this is a wrapper then return the result of recursively calling isWrapperFor on the wrapped
* object. If this does not implement the interface and is not a wrapper, return false.
* This method should be implemented as a low-cost operation compared to unwrap so that
* callers can use this method to avoid expensive unwrap calls that may fail. If this method
* returns true then calling unwrap with the same argument should succeed.
*
* @param interfaces
* a Class defining an interface.
* @return true if this implements the interface or directly or indirectly wraps an object that does.
* @throws java.sql.SQLException
* if an error occurs while determining whether this is a wrapper
* for an object with the given interface.
* @since 1.6
*/
public boolean isWrapperFor(Class iface) throws SQLException {
checkClosed();
// This works for classes that aren't actually wrapping anything
return iface.isInstance(this);
}
/**
* Returns an object that implements the given interface to allow access to non-standard methods,
* or standard methods not exposed by the proxy.
* The result may be either the object found to implement the interface or a proxy for that object.
* If the receiver implements the interface then that is the object. If the receiver is a wrapper
* and the wrapped object implements the interface then that is the object. Otherwise the object is
* the result of calling unwrap recursively on the wrapped object. If the receiver is not a
* wrapper and does not implement the interface, then an SQLException is thrown.
*
* @param iface
* A Class defining an interface that the result must implement.
* @return an object that implements the interface. May be a proxy for the actual implementing object.
* @throws java.sql.SQLException
* If no object found that implements the interface
* @since 1.6
*/
public T unwrap(java.lang.Class iface) throws java.sql.SQLException {
try {
// This works for classes that aren't actually wrapping anything
return iface.cast(this);
} catch (ClassCastException cce) {
throw SQLError.createSQLException("Unable to unwrap to " + iface.toString(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, getExceptionInterceptor());
}
}
@SuppressWarnings("unchecked")
public T getObject(int columnIndex, Class type) throws SQLException {
if (type == null) {
throw SQLError.createSQLException("Type parameter can not be null", SQLError.SQL_STATE_ILLEGAL_ARGUMENT, getExceptionInterceptor());
}
if (type.equals(Struct.class)) {
throw new SQLFeatureNotSupportedException();
} else if (type.equals(RowId.class)) {
return (T) getRowId(columnIndex);
} else if (type.equals(NClob.class)) {
return (T) getNClob(columnIndex);
} else if (type.equals(SQLXML.class)) {
return (T) getSQLXML(columnIndex);
}
return super.getObject(columnIndex, type);
}
}