class LibXML::XML::XPath::Object

Source

static VALUE rxml_xpath_object_aref(VALUE self, VALUE aref)
{
  rxml_xpath_object *rxpopp;

  if (rxml_xpath_object_empty_q(self) == Qtrue)
    return Qnil;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  return rxml_xpath_object_tabref(rxpopp->xpop, NUM2INT(aref));
}

xpath_object -> node

array index into set of nodes

debug → (true|false)

Source

static VALUE rxml_xpath_object_debug(VALUE self)
{
#ifdef LIBXML_DEBUG_ENABLED
  rxml_xpath_object *rxpopp;
  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  xmlXPathDebugDumpObject(stdout, rxpopp->xpop, 0);
  return Qtrue;
#else
  rb_warn("libxml was compiled without debugging support.");
  return Qfalse;
#endif
}

Dump libxml debugging information to stdout. Requires Libxml be compiled with debugging enabled.

each { |node| ... } → self

Source

static VALUE rxml_xpath_object_each(VALUE self)
{
  rxml_xpath_object *rxpopp;
  int i;

  if (rxml_xpath_object_empty_q(self) == Qtrue)
    return Qnil;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);

  for (i = 0; i < rxpopp->xpop->nodesetval->nodeNr; i++)
  {
    rb_yield(rxml_xpath_object_tabref(rxpopp->xpop, i));
  }
  return (self);
}

Call the supplied block for each node in this set.

empty? → (true|false)

Source

static VALUE rxml_xpath_object_empty_q(VALUE self)
{
  rxml_xpath_object *rxpopp;
  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);

  if (rxpopp->xpop->type != XPATH_NODESET)
    return Qnil;

  return (rxpopp->xpop->nodesetval == NULL || rxpopp->xpop->nodesetval->nodeNr <= 0) ? Qtrue
      : Qfalse;
}

Determine whether this nodeset is empty (contains no nodes).

first → node

Source

static VALUE rxml_xpath_object_first(VALUE self)
{
  rxml_xpath_object *rxpopp;

  if (rxml_xpath_object_empty_q(self) == Qtrue)
    return Qnil;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  return rxml_xpath_object_tabref(rxpopp->xpop, 0);
}

Returns the first node in this node set, or nil if none exist.

last → node

Source

static VALUE rxml_xpath_object_last(VALUE self)
{
  rxml_xpath_object *rxpopp;

  if (rxml_xpath_object_empty_q(self) == Qtrue)
    return Qnil;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  return rxml_xpath_object_tabref(rxpopp->xpop, -1);
}

Returns the last node in this node set, or nil if none exist.

length → num

Source

static VALUE rxml_xpath_object_length(VALUE self)
{
  rxml_xpath_object *rxpopp;

  if (rxml_xpath_object_empty_q(self) == Qtrue)
    return INT2FIX(0);

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  return INT2NUM(rxpopp->xpop->nodesetval->nodeNr);
}

Obtain the length of the nodesetval node list.

Also aliased as: size

size

Alias for: length

string → String

Source

static VALUE rxml_xpath_object_string(VALUE self)
{
  rxml_xpath_object *rxpopp;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);

  if (rxpopp->xpop->stringval == NULL)
    return Qnil;

  return rxml_new_cstr( rxpopp->xpop->stringval, rxpopp->xdoc->encoding);
}

Returns the original XPath expression as a string.

to_a → [node, ..., node]

Source

static VALUE rxml_xpath_object_to_a(VALUE self)
{
  VALUE set_ary, nodeobj;
  rxml_xpath_object *rxpopp;
  xmlXPathObjectPtr xpop;
  int i;

  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  xpop = rxpopp->xpop;

  set_ary = rb_ary_new();

  if (!((xpop->nodesetval == NULL) || (xpop->nodesetval->nodeNr == 0)))
  {
    for (i = 0; i < xpop->nodesetval->nodeNr; i++)
    {
      nodeobj = rxml_xpath_object_tabref(xpop, i);
      rb_ary_push(set_ary, nodeobj);
    }
  }

  return (set_ary);
}

Obtain an array of the nodes in this set.

xpath_type → int

Source

static VALUE rxml_xpath_object_get_type(VALUE self)
{
  rxml_xpath_object *rxpopp;
  TypedData_Get_Struct(self, rxml_xpath_object, &rxml_xpath_object_data_type, rxpopp);
  return INT2FIX(rxpopp->xpop->type);
}

Returns the XPath type of the result object. Possible values are defined as constants on the XML::XPath class and include:

XML::XPath::UNDEFINED
XML::XPath::NODESET
XML::XPath::BOOLEAN
XML::XPath::NUMBER
XML::XPath::STRING
XML::XPath::POINT
XML::XPath::RANGE
XML::XPath::LOCATIONSET
XML::XPath::USERS
XML::XPath::XSLT_TREE

class LibXML::XML::XPath::Object

Attributes

Public Instance Methods