OhmmsXPathObject Struct Reference

class to handle xmlXPathObject More...

Collaboration diagram for OhmmsXPathObject:

Public Member Functions
	OhmmsXPathObject ()
	OhmmsXPathObject (const char *expression, xmlXPathContextPtr context)
	constructor More...
	OhmmsXPathObject (const char *expression, xmlNodePtr cur)
	constructor More...
	~OhmmsXPathObject ()
void	put (const char *expression, xmlXPathContextPtr context)
	evaluate the expression and create the object More...
bool	empty ()
int	size ()
xmlNodePtr	operator[] (int i)

Public Attributes
int	NumObjects
xmlXPathObjectPtr	result
xmlXPathContextPtr	m_context

Detailed Description

class to handle xmlXPathObject

Definition at line 26 of file Libxml2Doc.h.

Constructor & Destructor Documentation

OhmmsXPathObject() [1/3]

OhmmsXPathObject

(

)

Definition at line 24 of file Libxml2Doc.cpp.

: NumObjects(0), result(NULL), m_context(NULL) {}

OhmmsXPathObject() [2/3]

OhmmsXPathObject	(	const char *	expression,
		xmlXPathContextPtr	context
	)

constructor

Parameters

expression	xpath expression
context	xmlXPathContext with which expression is evaluated

Definition at line 26 of file Libxml2Doc.cpp.

References put().

    : NumObjects(0), result(NULL), m_context(NULL)
{
  put(expression, context);
}

OhmmsXPathObject() [3/3]

OhmmsXPathObject	(	const char *	expression,
		xmlNodePtr	cur
	)

constructor

Parameters

expression	xpath expression
cur	xmlNodePtr

Create m_context

Definition at line 32 of file Libxml2Doc.cpp.

References m_context, and put().

    : NumObjects(0), result(NULL), m_context(NULL)
{
  m_context       = xmlXPathNewContext(cur->doc);
  m_context->node = cur;

  if (expression[0] == '.')
  {
    put(expression, m_context);
  }
  else
  {
    std::array<char, 128> local;
    if (std::snprintf(local.data(), local.size(), ".%s", expression) < 0)
      throw std::runtime_error("Error generating expression");
    put(local.data(), m_context);
  }
}

~OhmmsXPathObject()

~OhmmsXPathObject

(

)

Definition at line 51 of file Libxml2Doc.cpp.

References m_context, and result.

{
  if (result != NULL)
  {
    xmlXPathFreeObject(result);
  }

  if (m_context != NULL)
  {
    xmlXPathFreeContext(m_context);
  }
}

Member Function Documentation

empty()

bool empty ( )

inline

Definition at line 53 of file Libxml2Doc.h.

References NumObjects.

Referenced by TEST_CASE(), QMCCostFunctionBase::updateXmlNodes(), and QMCMain::validateXML().

{ return NumObjects == 0; }

operator[]()

xmlNodePtr operator[] ( int  i )

inline

Definition at line 57 of file Libxml2Doc.h.

References NumObjects, and result.

  {
    if (result != NULL && i < NumObjects)
    {
      return result->nodesetval->nodeTab[i];
    }
    else
    {
      return NULL;
    }
  }

put()

void put	(	const char *	expression,
		xmlXPathContextPtr	context
	)

evaluate the expression and create the object

Parameters

expression	xpath expression
context	xmlXPathContext with which expression is evaluated

Definition at line 64 of file Libxml2Doc.cpp.

References NumObjects, and result.

Referenced by OhmmsXPathObject().

{
  //free the object if it has been used before
  if (result != NULL)
    xmlXPathFreeObject(result);
  result = xmlXPathEvalExpression((const xmlChar*)expression, context);
  if (xmlXPathNodeSetIsEmpty(result->nodesetval))
  {
    NumObjects = 0;
  }
  else
  {
    NumObjects = result->nodesetval->nodeNr;
  }
}

size()

int size ( void  )

inline

Definition at line 55 of file Libxml2Doc.h.

References NumObjects.

Referenced by QMCMain::setMCWalkers(), TEST_CASE(), and QMCCostFunctionBase::updateXmlNodes().

{ return NumObjects; }

Member Data Documentation

m_context

xmlXPathContextPtr m_context

Definition at line 71 of file Libxml2Doc.h.

Referenced by OhmmsXPathObject(), and ~OhmmsXPathObject().

NumObjects

int NumObjects

Definition at line 69 of file Libxml2Doc.h.

Referenced by empty(), operator[](), put(), and size().

result

xmlXPathObjectPtr result

Definition at line 70 of file Libxml2Doc.h.

Referenced by operator[](), put(), and ~OhmmsXPathObject().

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The documentation for this struct was generated from the following files:

• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/io/OhmmsData/Libxml2Doc.h
• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/io/OhmmsData/Libxml2Doc.cpp