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/*
* Copyright (c) 2002, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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, version 2.0,
* 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.cj.jdbc;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import java.sql.SQLException;
import com.mysql.cj.Messages;
import com.mysql.cj.exceptions.ExceptionInterceptor;
import com.mysql.cj.exceptions.MysqlErrorNumbers;
import com.mysql.cj.jdbc.exceptions.SQLError;
import com.mysql.cj.protocol.OutputStreamWatcher;
import com.mysql.cj.protocol.WatchableOutputStream;
import com.mysql.cj.protocol.WatchableStream;
import com.mysql.cj.protocol.WatchableWriter;
import com.mysql.cj.protocol.WriterWatcher;
import com.mysql.cj.util.StringUtils;
/**
* Simplistic implementation of java.sql.Clob for MySQL Connector/J
*/
public class Clob implements java.sql.Clob, OutputStreamWatcher, WriterWatcher {
private String charData;
private ExceptionInterceptor exceptionInterceptor;
Clob(ExceptionInterceptor exceptionInterceptor) {
this.charData = "";
this.exceptionInterceptor = exceptionInterceptor;
}
public Clob(String charDataInit, ExceptionInterceptor exceptionInterceptor) {
this.charData = charDataInit;
this.exceptionInterceptor = exceptionInterceptor;
}
@Override
public InputStream getAsciiStream() throws SQLException {
if (this.charData != null) {
return new ByteArrayInputStream(StringUtils.getBytes(this.charData));
}
return null;
}
@Override
public Reader getCharacterStream() throws SQLException {
if (this.charData != null) {
return new StringReader(this.charData);
}
return null;
}
@Override
public String getSubString(long startPos, int length) throws SQLException {
if (startPos < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.6"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
int adjustedStartPos = (int) startPos - 1;
int adjustedEndIndex = adjustedStartPos + length;
if (this.charData != null) {
if (adjustedEndIndex > this.charData.length()) {
throw SQLError.createSQLException(Messages.getString("Clob.7"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
return this.charData.substring(adjustedStartPos, adjustedEndIndex);
}
return null;
}
@Override
public long length() throws SQLException {
if (this.charData != null) {
return this.charData.length();
}
return 0;
}
@Override
public long position(java.sql.Clob arg0, long arg1) throws SQLException {
return position(arg0.getSubString(1L, (int) arg0.length()), arg1);
}
@Override
public long position(String stringToFind, long startPos) throws SQLException {
if (startPos < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.8", new Object[] { startPos }), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT,
this.exceptionInterceptor);
}
if (this.charData != null) {
if ((startPos - 1) > this.charData.length()) {
throw SQLError.createSQLException(Messages.getString("Clob.10"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
int pos = this.charData.indexOf(stringToFind, (int) (startPos - 1));
return (pos == -1) ? (-1) : (pos + 1);
}
return -1;
}
@Override
public OutputStream setAsciiStream(long indexToWriteAt) throws SQLException {
if (indexToWriteAt < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.0"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
WatchableOutputStream bytesOut = new WatchableOutputStream();
bytesOut.setWatcher(this);
if (indexToWriteAt > 0) {
bytesOut.write(StringUtils.getBytes(this.charData), 0, (int) (indexToWriteAt - 1));
}
return bytesOut;
}
@Override
public Writer setCharacterStream(long indexToWriteAt) throws SQLException {
if (indexToWriteAt < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.1"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
WatchableWriter writer = new WatchableWriter();
writer.setWatcher(this);
//
// Don't call write() if nothing to write...
//
if (indexToWriteAt > 1) {
writer.write(this.charData, 0, (int) (indexToWriteAt - 1));
}
return writer;
}
@Override
public int setString(long pos, String str) throws SQLException {
if (pos < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.2"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
if (str == null) {
throw SQLError.createSQLException(Messages.getString("Clob.3"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
StringBuilder charBuf = new StringBuilder(this.charData);
pos--;
int strLength = str.length();
charBuf.replace((int) pos, (int) (pos + strLength), str);
this.charData = charBuf.toString();
return strLength;
}
@Override
public int setString(long pos, String str, int offset, int len) throws SQLException {
if (pos < 1) {
throw SQLError.createSQLException(Messages.getString("Clob.4"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
if (str == null) {
throw SQLError.createSQLException(Messages.getString("Clob.5"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
StringBuilder charBuf = new StringBuilder(this.charData);
pos--;
try {
String replaceString = str.substring(offset, offset + len);
charBuf.replace((int) pos, (int) (pos + replaceString.length()), replaceString);
} catch (StringIndexOutOfBoundsException e) {
throw SQLError.createSQLException(e.getMessage(), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, e, this.exceptionInterceptor);
}
this.charData = charBuf.toString();
return len;
}
@Override
public void streamClosed(WatchableStream out) {
int streamSize = out.size();
if (streamSize < this.charData.length()) {
out.write(StringUtils.getBytes(this.charData), streamSize, this.charData.length() - streamSize);
}
this.charData = StringUtils.toAsciiString(out.toByteArray());
}
@Override
public void truncate(long length) throws SQLException {
if (length > this.charData.length()) {
throw SQLError.createSQLException(
Messages.getString("Clob.11") + this.charData.length() + Messages.getString("Clob.12") + length + Messages.getString("Clob.13"),
this.exceptionInterceptor);
}
this.charData = this.charData.substring(0, (int) length);
}
public void writerClosed(char[] charDataBeingWritten) {
this.charData = new String(charDataBeingWritten);
}
@Override
public void writerClosed(WatchableWriter out) {
int dataLength = out.size();
if (dataLength < this.charData.length()) {
out.write(this.charData, dataLength, this.charData.length() - dataLength);
}
this.charData = out.toString();
}
@Override
public void free() throws SQLException {
this.charData = null;
}
@Override
public Reader getCharacterStream(long pos, long length) throws SQLException {
return new StringReader(getSubString(pos, (int) length));
}
}
