content: /*
   * Copyright (c) 2022, 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.protocol.a;
  
  import java.io.IOException;
  import java.io.Reader;
  import java.io.UnsupportedEncodingException;
  
  import com.mysql.cj.BindValue;
  import com.mysql.cj.conf.PropertyKey;
  import com.mysql.cj.exceptions.CJOperationNotSupportedException;
  import com.mysql.cj.exceptions.ExceptionFactory;
  import com.mysql.cj.exceptions.WrongArgumentException;
  import com.mysql.cj.protocol.Message;
  import com.mysql.cj.util.StringUtils;
  import com.mysql.cj.util.Util;
  
  public class ReaderValueEncoder extends AbstractValueEncoder {
  
      @Override
      public byte[] getBytes(BindValue binding) {
          return readBytes((Reader) binding.getValue(), binding);
      }
  
      @Override
      public String getString(BindValue binding) {
          return "'** STREAM DATA **'";
      }
  
      @Override
      public void encodeAsBinary(Message msg, BindValue binding) {
          throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
      }
  
      protected byte[] readBytes(Reader reader, BindValue binding) {
          try {
              char[] c = null;
              int len = 0;
              byte[] bytes;
  
              boolean useLength = this.propertySet.getBooleanProperty(PropertyKey.useStreamLengthsInPrepStmts).getValue();
              String forcedEncoding = binding.isNational() ? null : this.propertySet.getStringProperty(PropertyKey.clobCharacterEncoding).getStringValue();
  
              long scaleOrLength = binding.getScaleOrLength();
              if (useLength && (scaleOrLength != -1)) {
                  c = new char[(int) scaleOrLength];
                  int numCharsRead = Util.readFully(reader, c, (int) scaleOrLength); // blocks until all read
                  bytes = StringUtils.getBytes(new String(c, 0, numCharsRead), forcedEncoding);
              } else {
                  c = new char[4096];
                  StringBuilder buf = new StringBuilder();
                  while ((len = reader.read(c)) != -1) {
                      buf.append(c, 0, len);
                  }
                  bytes = StringUtils.getBytes(buf.toString(), forcedEncoding);
              }
              return escapeBytesIfNeeded(bytes);
  
          } catch (UnsupportedEncodingException uec) {
              throw ExceptionFactory.createException(WrongArgumentException.class, uec.toString(), uec, this.exceptionInterceptor);
          } catch (IOException ioEx) {
              throw ExceptionFactory.createException(ioEx.toString(), ioEx, this.exceptionInterceptor);
          }
      }
  
  }
  