XMLStorage::XPathElement Struct Reference

#include <xmlstorage.h>

Collaboration diagram for XMLStorage::XPathElement:

Public Member Functions
	XPathElement ()
	XPathElement (const XS_String &child_name, int child_idx=-1)
	XPathElement (const XS_String &child_name, int child_idx, const XS_String &attr_name, const XS_String &attr_value)
const char *	parse (const char *path)
XMLNode *	find (XMLNode *node) const
const XMLNode *	const_find (const XMLNode *node) const
bool	matches (const XMLNode &node, int &n) const

Public Attributes
XS_String	_child_name
int	_child_idx
XS_String	_attr_name
XS_String	_attr_value

Detailed Description

Definition at line 814 of file xmlstorage.h.

Constructor & Destructor Documentation

XPathElement() [1/3]

XMLStorage::XPathElement::XPathElement ( )

inline

Definition at line 816 of file xmlstorage.h.

: _child_idx(-1) {}

XPathElement() [2/3]

XMLStorage::XPathElement::XPathElement ( const XS_String &  child_name, int  child_idx = -1  )

inline

Definition at line 818 of file xmlstorage.h.

     :  _child_name(child_name), _child_idx(child_idx) {}

XPathElement() [3/3]

XMLStorage::XPathElement::XPathElement ( const XS_String &  child_name, int  child_idx, const XS_String &  attr_name, const XS_String &  attr_value  )

inline

Definition at line 821 of file xmlstorage.h.

     :  _child_name(child_name), _child_idx(child_idx),
        _attr_name(attr_name), _attr_value(attr_value)
    {
    }

Member Function Documentation

const_find()

const XMLNode * XMLStorage::XPathElement::const_find

(

const XMLNode *

node

)

const

Definition at line 195 of file xmlstorage.cpp.

{
    int n = 0;
 
    for(XMLNode::Children::const_iterator it=node->_children.begin(); it!=node->_children.end(); ++it)
        if (matches(**it, n))
            return *it;
 
    return NULL;
}

Referenced by XMLStorage::const_XMLPos::go_down(), and XMLStorage::const_XMLPos::iterate().

find()

XMLNode * XMLStorage::XPathElement::find

(

XMLNode *

node

)

const

Definition at line 184 of file xmlstorage.cpp.

{
    int n = 0;
 
    for(XMLNode::Children::const_iterator it=node->_children.begin(); it!=node->_children.end(); ++it)
        if (matches(**it, n))
            return *it;
 
    return NULL;
}

Referenced by XMLStorage::XMLPos::go_down(), XMLStorage::XMLPos::iterate(), and XMLStorage::XMLPos::smart_create().

matches()

bool XMLStorage::XPathElement::matches	(	const XMLNode &	node,
		int &	n
	)		const

Definition at line 206 of file xmlstorage.cpp.

{
    if (node != _child_name)
        if (_child_name != XS_TEXT("*"))    // use asterisk as wildcard
            return false;
 
    if (!_attr_name.empty())
        if (node.get(_attr_name) != _attr_value)
            return false;
 
    if (_child_idx == -1)
        return true;
    else if (n++ == _child_idx)
        return true;
    else
        return false;
}

parse()

const char * XMLStorage::XPathElement::parse

(

const char *

path

)

Definition at line 142 of file xmlstorage.cpp.

{
    const char* slash = strchr(path, '/');
    if (slash == path)
        return NULL;
 
    size_t l = slash? slash-path: strlen(path);
    std::string comp(path, l);
    path += l;
 
     // look for [n] and [@attr_name="attr_value"] expressions in path components
    const char* bracket = strchr(comp.c_str(), '[');
    l = bracket? bracket-comp.c_str(): comp.length();
    _child_name.assign(comp.c_str(), l);
 
    int n = 0;
    if (bracket) {
        std::string expr = unescape(bracket, '[', ']');
        const char* p = expr.c_str();
 
        n = atoi(p);    // read index number
 
        if (n)
            _child_idx = n - 1; // convert into zero based index
 
        const char* at = strchr(p, '@');
 
        if (at) {
            p = at + 1;
            const char* equal = strchr(p, '=');
 
             // read attribute name and value
            if (equal) {
                _attr_name = unescape(p, equal-p);
                _attr_value = unescape(equal+1);
            }
        }
    }
 
    return path;
}

Member Data Documentation

_attr_name

XS_String XMLStorage::XPathElement::_attr_name

Definition at line 830 of file xmlstorage.h.

Referenced by matches(), and parse().

_attr_value

XS_String XMLStorage::XPathElement::_attr_value

Definition at line 831 of file xmlstorage.h.

Referenced by matches(), and parse().

_child_idx

int XMLStorage::XPathElement::_child_idx

Definition at line 828 of file xmlstorage.h.

Referenced by matches(), and parse().

_child_name

XS_String XMLStorage::XPathElement::_child_name

Definition at line 827 of file xmlstorage.h.

Referenced by matches(), and parse().

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

• modules/rosapps/applications/explorer-old/utility/xmlstorage.h
• modules/rosapps/applications/explorer-old/utility/xmlstorage.cpp