SAXState-class              package:XML              R Documentation

_A _v_i_r_t_u_a_l _b_a_s_e _c_l_a_s_s _d_e_f_i_n_i_n_g _m_e_t_h_o_d_s _f_o_r _S_A_X _p_a_r_s_i_n_g

_D_e_s_c_r_i_p_t_i_o_n:

     This is a degenerate virtual class which others are expected to
     sub-class so as to define when they want to use S4 methods as
     handler functions for SAX-based XML parsing. The idea is that one
     can pass both i)  a collection of handlers to 'xmlEventParse'
     which are simply  the generic functions for the different SAX
     actions, and ii) a suitable object to maintain state across the
     different SAX calls. This is used to perform the method
     dispatching to get the appropriate behavior for the action. Each
     of these methods is expected to return the updated state object
     and the SAX parser will pass this in the next callback.

     We define this class here so that we can provide default methods
     for each of the different handler actions. This allows other
     programmers to define new classes to maintain state that are
     sub-class of 'SAXState' and then they do not have to implement
     methods for each of the different handlers.

_O_b_j_e_c_t_s _f_r_o_m _t_h_e _C_l_a_s_s:

     A virtual Class: No objects may be created from it.

_M_e_t_h_o_d_s:

     _c_o_m_m_e_n_t._S_A_X 'signature(content = "ANY", .state = "SAXState")': ... 

     _e_n_d_E_l_e_m_e_n_t._S_A_X 'signature(name = "ANY", .state = "SAXState")': ... 

     _e_n_t_i_t_y_D_e_c_l_a_r_a_t_i_o_n._S_A_X 'signature(name = "ANY", base = "ANY", sysId
          = "ANY", publicId = "ANY", notationName = "ANY", .state =
          "SAXState")': ... 

     _p_r_o_c_e_s_s_i_n_g_I_n_s_t_r_u_c_t_i_o_n._S_A_X 'signature(target = "ANY", content =
          "ANY", .state = "SAXState")': ... 

     _s_t_a_r_t_E_l_e_m_e_n_t._S_A_X 'signature(name = "ANY", atts = "ANY", .state =
          "SAXState")': ... 

     _t_e_x_t._S_A_X 'signature(content = "ANY", .state = "SAXState")': ... 

_A_u_t_h_o_r(_s):

     Duncan Temple Lang

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.w3.org/XML>, <URL: http://www.xmlsoft.org>

_S_e_e _A_l_s_o:

     'xmlEventParse'

_E_x_a_m_p_l_e_s:

