Examples of DataValueDescriptor

org.apache.derby.iapi.types.DataValueDescriptor
The DataValueDescriptor interface provides methods to get the data from a column returned by a statement.
This interface matches the getXXX methods on java.sql.ResultSet. This means everyone satisfies getString and getObject; all of the numeric types, within the limits of representation, satisfy all of the numeric getXXX methods; all of the character types satisfy all of the getXXX methods except getBytes and getBinaryStream; all of the binary types satisfy getBytes and all of the getXXXStream methods; Date satisfies getDate and getTimestamp; Time satisfies getTime; and Timestamp satisfies all of the date/time getXXX methods. The "preferred" method (one that will always work, I presume) is the one that matches the type most closely. See the comments below for "preferences". See the JDBC guide for details.
This interface does not include the getXXXStream methods.
The preferred methods for JDBC are:
CHAR and VARCHAR - getString()
BIT - getBoolean()
TINYINT - getByte()
SMALLINT - getShort()
INTEGER - getInt()
BIGINT - getLong()
REAL - getFloat()
FLOAT and DOUBLE - getDouble()
DECIMAL and NUMERIC - getBigDecimal()
BINARY and VARBINARY - getBytes()
DATE - getDate()
TIME - getTime()
TIMESTAMP - getTimestamp()
No JDBC type corresponds to getObject(). Use this for user-defined types or to get the JDBC types as java Objects. All primitive types will be wrapped in their corresponding Object type, i.e. int will be wrapped in an Integer.
getStream()

Examples of org.apache.derby.iapi.types.DataValueDescriptor


    for (int index = 0; index < columnCount; index++)
    {
      ColumnDescriptor cd = (ColumnDescriptor) columnDescriptorList.elementAt(index);
      //String name = column.getColumnName();
      DataValueDescriptor dataValue = cd.getType().getNull();
      result.setColumn(index + 1, dataValue);
    }
    return result;
  }

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

    throws StandardException
  {
    int numColumns = ourIndexRow.nColumns();
    for (int index = 1; index <= numColumns; index++)
    {
      DataValueDescriptor oldOrderable = ourIndexRow.getColumn(index);
      DataValueDescriptor newOrderable = ourUpdatedIndexRow.getColumn(index);
      if (! (oldOrderable.compare(DataValueDescriptor.ORDER_OP_EQUALS, newOrderable, true, true)))
      {
        return true;
      }
    }

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

                            }
                        }
                        
                        if(col <= maxColumns)
                        {
                            DataValueDescriptor dvd = row.cloneColumn(col);
                            user_autoinc = dvd.getLong();
                        }
             } 


      // No need to do a next on a single row source
             if (constants.singleRowSource)

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

        int readIx = (baseRowReadMap == null) ?
          heapIx :
          baseRowReadMap[heapIx];


                
        DataValueDescriptor col = row.getColumn(readIx+1);
        InputStream stream = ((StreamStorable)col).returnStream();
        ((StreamStorable)col).loadStream();
        // DERBY-3238 
        // fix up any duplicate streams, for instance in the case of an update with a trigger,
        // all the columns are read as update columns even if they are not updated, so 
        // the update column will still have a reference to the original stream.
        // If we knew from this context that this was an update and we knew the number
        // of columns in the base table we would be able to calculate exactly the offset to 
        // check, but we don't have that information from this context.
        // If DERBY-1482 is fixed, perhaps this code can be removed.
        
        if (stream != null)
          for (int i = 1; i <= row.nColumns(); i++)
          {
            DataValueDescriptor c = row.getColumn(i);
            if (c instanceof StreamStorable)
              if (((StreamStorable)c).returnStream() == stream)
                row.setColumn(i, col.getClone());
          }
        }

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

                        DataValueDescriptor v4,
                        int judgeTypeFormatId,
                        int judgeUserJDBCTypeId)
                    throws StandardException
  {
    DataValueDescriptor judge;
    if (judgeUserJDBCTypeId == -1)
      judge = (DataValueDescriptor) new TypeId(judgeTypeFormatId, null).getNull();
    else
      judge = (DataValueDescriptor) new TypeId(judgeTypeFormatId, new UserDefinedTypeIdImpl()).getNull();
      
    DataValueDescriptor minVal = v1;
    if (v2 != null && judge.lessThan(v2, minVal).equals(true))
      minVal = v2;
    if (v3 != null && judge.lessThan(v3, minVal).equals(true))
      minVal = v3;
    if (v4 != null && judge.lessThan(v4, minVal).equals(true))

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

                        DataValueDescriptor v4,
                        int judgeTypeFormatId,
                        int judgeUserJDBCTypeId)
                    throws StandardException
  {
    DataValueDescriptor judge;
    if (judgeUserJDBCTypeId == -1)
      judge =  new TypeId(judgeTypeFormatId, null).getNull();
    else
      judge =  new TypeId(judgeTypeFormatId, new UserDefinedTypeIdImpl()).getNull();


    DataValueDescriptor maxVal = v1;
    if (v2 != null && judge.greaterThan(v2, maxVal).equals(true))
      maxVal = v2;
    if (v3 != null && judge.greaterThan(v3, maxVal).equals(true))
      maxVal = v3;
    if (v4 != null && judge.greaterThan(v4, maxVal).equals(true))

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

    if (SanityManager.DEBUG)
        SanityManager.ASSERT( ! isOpen, "ProjectRestrictResultSet already open");


    if (constantRestriction != null)
    {
        DataValueDescriptor restrictBoolean;
            restrictBoolean = (DataValueDescriptor) 
          constantRestriction.invoke(activation);


              // if the result is null, we make it false --
        // so the row won't be returned.
            constantEval = (restrictBoolean == null) ||
            ((! restrictBoolean.isNull()) &&
              restrictBoolean.getBoolean());
    }


    if (constantEval)
    {
          source.openCore();

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

    if (SanityManager.DEBUG)
        SanityManager.ASSERT(isOpen, "ProjectRestrictResultSet not open, cannot reopen");


    if (constantRestriction != null)
    {
        DataValueDescriptor restrictBoolean;
            restrictBoolean = (DataValueDescriptor) 
          constantRestriction.invoke(activation);


              // if the result is null, we make it false --
        // so the row won't be returned.
            constantEval = (restrictBoolean == null) ||
            ((! restrictBoolean.isNull()) &&
              restrictBoolean.getBoolean());
    }


    if (constantEval)
    {
          source.reopenCore();

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

  public ExecRow  getNextRowCore() throws StandardException {


      ExecRow candidateRow = null;
      ExecRow result = null;
      boolean restrict = false;
      DataValueDescriptor restrictBoolean;
    long  beginRT = 0;


    /* Return null if open was short circuited by false constant expression */
    if (shortCircuitOpen)
    {
      return result;
    }


    beginTime = getCurrentTimeMillis();
      do 
    {
      candidateRow = source.getNextRowCore();
      if (candidateRow != null) 
      {
        beginRT = getCurrentTimeMillis();
        /* If restriction is null, then all rows qualify */
        if (restriction == null)
        {
          restrict = true;
        }
        else
        {
          setCurrentRow(candidateRow);
                restrictBoolean = (DataValueDescriptor) 
                      restriction.invoke(activation);
          restrictionTime += getElapsedMillis(beginRT);


                // if the result is null, we make it false --
          // so the row won't be returned.
            restrict = ((! restrictBoolean.isNull()) &&
                 restrictBoolean.getBoolean());
          if (! restrict)
          {
            rowsFiltered++;
          }
        }

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Examples of org.apache.derby.iapi.types.DataValueDescriptor

   */
  public ExecRow getCurrentRow() throws StandardException {
      ExecRow candidateRow = null;
      ExecRow result = null;
      boolean restrict = false;
      DataValueDescriptor restrictBoolean;


    if (SanityManager.DEBUG)
      SanityManager.ASSERT(isOpen, "PRRS is expected to be open");


    /* Nothing to do if we're not currently on a row */
    if (currentRow == null)
    {
      return null;
    }


    /* Call the child result set to get it's current row.
     * If no row exists, then return null, else requalify it
     * before returning.
     */
    candidateRow = ((CursorResultSet) source).getCurrentRow();
    if (candidateRow != null) {
      setCurrentRow(candidateRow);
        /* If restriction is null, then all rows qualify */
            restrictBoolean = (DataValueDescriptor) 
          ((restriction == null) ? null : restriction.invoke(activation));


            // if the result is null, we make it false --
      // so the row won't be returned.
            restrict = (restrictBoolean == null) ||
            ((! restrictBoolean.isNull()) &&
              restrictBoolean.getBoolean());
    }


      if (candidateRow != null && restrict) 
    {
      result = doProjection(candidateRow);

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