question: void pushSpaceHandling ( Attributes attrs ) throws org . xml . sax . SAXParseException { String value = attrs . getValue ( "xml:space" ) ; if ( null == value ) { m_spacePreserveStack . push ( m_spacePreserveStack . peekOrFalse ( ) ) ; } else if ( value . equals ( "preserve" ) ) { m_spacePreserveStack . push ( true ) ; } else if ( value . equals ( "default" ) ) { m_spacePreserveStack . push ( false ) ; } else { SAXSourceLocator locator = getLocator ( ) ; ErrorListener handler = m_stylesheetProcessor . getErrorListener ( ) ; try { handler . error ( new TransformerException ( XSLMessages . createMessage ( XSLTErrorResources . ER_ILLEGAL_XMLSPACE_VALUE , null ) , locator ) ) ; } catch ( TransformerException te ) { throw new org . xml . sax . SAXParseException ( te . getMessage ( ) , locator , te ) ; } m_spacePreserveStack . push ( m_spacePreserveStack . peek ( ) ) ; } }
target:  Push boolean value on to the spacePreserve stack depending on the value  of xml:space=default/preserve.