content: /*
   * Copyright (c) 2015, 2021, 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.result;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  
  import com.mysql.cj.Constants;
  import com.mysql.cj.Messages;
  import com.mysql.cj.conf.PropertyKey;
  import com.mysql.cj.conf.PropertySet;
  import com.mysql.cj.exceptions.DataConversionException;
  import com.mysql.cj.protocol.a.MysqlTextValueDecoder;
  import com.mysql.cj.util.DataTypeUtil;
  import com.mysql.cj.util.StringUtils;
  
  /**
   * A value factory for creating {@link java.lang.Boolean} values.
   */
  public class BooleanValueFactory extends DefaultValueFactory<Boolean> {
  
      public BooleanValueFactory(PropertySet pset) {
          super(pset);
      }
  
      @Override
      public Boolean createFromLong(long l) {
          // Goes back to ODBC driver compatibility, and VB/Automation Languages/COM, where in Windows "-1" can mean true as well.
          return (l == -1 || l > 0);
      }
  
      @Override
      public Boolean createFromBigInteger(BigInteger i) {
          return i.compareTo(Constants.BIG_INTEGER_ZERO) > 0 || i.compareTo(Constants.BIG_INTEGER_NEGATIVE_ONE) == 0;
      }
  
      @Override
      // getBoolean() from DOUBLE, DECIMAL are required by JDBC spec....
      public Boolean createFromDouble(double d) {
          // this means that 0.1 or -1 will be TRUE
          return d > 0 || d == -1.0d;
      }
  
      @Override
      public Boolean createFromBigDecimal(BigDecimal d) {
          // this means that 0.1 or -1 will be TRUE
          return d.compareTo(Constants.BIG_DECIMAL_ZERO) > 0 || d.compareTo(Constants.BIG_DECIMAL_NEGATIVE_ONE) == 0;
      }
  
      @Override
      public Boolean createFromBit(byte[] bytes, int offset, int length) {
          return createFromLong(DataTypeUtil.bitToLong(bytes, offset, length));
      }
  
      @Override
      public Boolean createFromYear(long l) {
          return createFromLong(l);
      }
  
      public String getTargetTypeName() {
          return Boolean.class.getName();
      }
  
      @Override
      public Boolean createFromBytes(byte[] bytes, int offset, int length, Field f) {
          if (length == 0 && this.pset.getBooleanProperty(PropertyKey.emptyStringsConvertToZero).getValue()) {
              return createFromLong(0);
          }
  
          String s = StringUtils.toString(bytes, offset, length, f.getEncoding());
          byte[] newBytes = s.getBytes();
  
          if (s.equalsIgnoreCase("Y") || s.equalsIgnoreCase("yes") || s.equalsIgnoreCase("T") || s.equalsIgnoreCase("true")) {
              return createFromLong(1);
          } else if (s.equalsIgnoreCase("N") || s.equalsIgnoreCase("no") || s.equalsIgnoreCase("F") || s.equalsIgnoreCase("false")) {
              return createFromLong(0);
          } else if (s.contains("e") || s.contains("E") || s.matches("-?\\d*\\.\\d*")) {
              // floating point
              return createFromDouble(MysqlTextValueDecoder.getDouble(newBytes, 0, newBytes.length));
          } else if (s.matches("-?\\d+")) {
              // integer
              if (s.charAt(0) == '-' // TODO shouldn't we check the length as well?
                      || length <= (MysqlTextValueDecoder.MAX_SIGNED_LONG_LEN - 1) && newBytes[0] >= '0' && newBytes[0] <= '8') {
                  return createFromLong(MysqlTextValueDecoder.getLong(newBytes, 0, newBytes.length));
              }
              return createFromBigInteger(MysqlTextValueDecoder.getBigInteger(newBytes, 0, newBytes.length));
          }
          throw new DataConversionException(Messages.getString("ResultSet.UnableToInterpretString", new Object[] { s }));
      }
  }
  