Constructor Detail

• IsNull

  public IsNull(ADQLColumn column)
         throws java.lang.NullPointerException

  Builds a comparison between the given column and NULL.

  Parameters:

  column - The column whose the value must be compared to NULL.

  Throws:

  java.lang.NullPointerException - If the given column is null.

• IsNull

  public IsNull(ADQLColumn column,
                boolean isNot)
         throws java.lang.NullPointerException

  Builds a comparison between the column and NULL.

  Parameters:

  column - The column whose the value must be compared to NULL.

  isNot - true means IS NOT NULL, false means IS NULL.

  Throws:

  java.lang.NullPointerException - If the given column is null.

• IsNull

  public IsNull(IsNull toCopy)
         throws java.lang.Exception

  Builds a IsNull constraint by copying the given one.

  Parameters:

  toCopy - The IsNull to copy.

  Throws:

  java.lang.Exception - If there is an error during the copy.

Method Detail

• getColumn

  public final ADQLColumn getColumn()

  Gets the column whose the value is compared to NULL.

  Returns:

  The column compared to NULL.

• setColumn

  public final void setColumn(ADQLColumn column)
                       throws java.lang.NullPointerException

  Lets changing the column whose the value must be compared to NULL.

  Parameters:

  column - The new column to compare to NULL.

  Throws:

  java.lang.NullPointerException - If the given column is null.

• isNotNull

  public final boolean isNotNull()

  Tells whether the predicate is IS NULL or IS NOT NULL.

  Returns:

  true for IS NOT NULL, false for IS NULL.

• setNotNull

  public final void setNotNull(boolean notNull)

  Lets indicating which predicate must be used (IS NULL or IS NOT NULL).

  Parameters:

  notNull - true for IS NOT NULL, false for IS NULL.

• getCopy

  public ADQLObject getCopy()
                     throws java.lang.Exception

  Description copied from interface: ADQLObject
  Gets a (deep) copy of this ADQL object.

  Specified by:

  getCopy in interface ADQLObject

  Returns:

  The copy of this ADQL object.

  Throws:

  java.lang.Exception - If there is any error during the copy.

• getName

  public java.lang.String getName()

  Description copied from interface: ADQLObject
  Gets the name of this object in ADQL.

  Specified by:

  getName in interface ADQLObject

  Returns:

  The name of this ADQL object.

• adqlIterator

  public ADQLIterator adqlIterator()

  Description copied from interface: ADQLObject

  Gets an iterator on the intern ADQL objects.

  Note:The returned iterator is particularly used by a ISearchHandler extension to browse a whole ADQL tree.

  Specified by:

  adqlIterator in interface ADQLObject

  Returns:

  An ADQL objects iterator.

  See Also:

  ADQLIterator, ISearchHandler

• toADQL

  public java.lang.String toADQL()

  Description copied from interface: ADQLObject
  Gets the ADQL expression of this object.

  Specified by:

  toADQL in interface ADQLObject

  Returns:

  The corresponding ADQL expression.