/usr/include/cxxtools/xml/startelement.h is in libcxxtools-dev 2.0-4ubuntu2.
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* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef cxxtools_xml_StartElement_h
#define cxxtools_xml_StartElement_h
#include <cxxtools/xml/api.h>
#include <cxxtools/xml/node.h>
#include <cxxtools/xml/namespace.h>
#include <cxxtools/xml/namespacecontext.h>
#include <cxxtools/string.h>
#include <list>
namespace cxxtools {
namespace xml {
/**
* @brief A class representing a single attribute of a tag from an XML document.
*
* An XML attribute consists of the attribute's name and the attribute's value.
* The name can be retrieved using the method name(). The value can be retrieved
* using the method value().
*
* The attributes of a tag are retrieved from the document when the opening tag
* is parsed. The attributes are stored in a StartElement object from where they
* can be retrieved.
*/
class CXXTOOLS_XML_API Attribute
{
public:
//! Constructs a new Attribute object with an empty name and value.
Attribute();
/**
* @brief Constructs a new Attribute using the given name and value.
*
* @param name The name of the XML attribute.
* @param value The value of the XML attribute.
*/
Attribute(const String& name, const String& value);
//! Empty destructor
virtual ~Attribute();
/**
* @brief Returns the name of this attribute.
* @return The attribute's name.
*/
const String& name() const
{return _name;}
String& name()
{return _name;}
/**
* @brief Sets the name of this attribute.
* @param name The new name of this attribute.
*/
void setName(const String name)
{_name = name;}
/**
* @brief Returns the value of this attribute.
* @return The attribute's value.
*/
const String& value() const
{return _value;}
String& value()
{return _value;}
/**
* @brief Sets the value of this attribute.
* @param value The new value of this attribute.
*/
void setValue(const String value)
{_value = value;}
void clear()
{ _name.clear(); _value.clear(); }
private:
//! The name of this attribute.
String _name;
//! The value of this attribute.
String _value;
};
/**
* @brief A start element (Node) which represents an opening tag of an XML document.
*
* A start element is created when the parser reaches a start tag, for example $<a>$.
* A StartElement object not only stores the name of the tag and its namespace information,
* but also stores the attributes of the tag. These attributes can be accessed by calling
* attributes(), attribute() and hasAttribute().
*
* Use name() to get the name of the tag which was closed.
*
* When parsing $<a>test</a>$ a StartElement, a Character and finally an EndElement node is
* created. If an empty tag is parsed, like for example $</a>$, a StartElement and an EndElement
* is created.
*
* @see EndElement
* @see Node
* @see Attribute
*/
class CXXTOOLS_XML_API StartElement : public Node
{
public:
//! Constructs a new StartElement object with no name and an empty attribute list.
StartElement();
/**
* @brief Constructs a new StartElement object with the given string as tag name.
*
* @param name The name of the EndElement object. This is an optional parameter.
* Default is an empty string.
*/
StartElement(const String& name);
//! Empty destructor
~StartElement();
/**
* @brief Clones this StartElement object by creating a duplicate on the heap and returning it.
* @return A cloned version of this StartElement object.
*/
StartElement* clone() const
{return new StartElement(*this);}
void clear()
{
_name.clear();
_attributes.clear();
}
/**
* @brief Returns the tag name of the opening tag for which this StartElement object was created.
*
* When parsing <a>test</a> a StartElement, a Character and finally an EndElement node is
* created. The StartElement has the name "a". If an empty tag is parsed, like for example </a>,
* only a StartElement and an EndElement ("a") is created.
*
* @return The tag name of the opening tag for which this StartElement object was created.
*/
String& name() {return _name;}
/**
* @brief Returns the tag name of the opening tag for which this StartElement object was created.
*
* When parsing <a>test</a> a StartElement, a Character and finally an EndElement node is
* created. The StartElement has the name "a". If an empty tag is parsed, like for example </a>,
* only a StartElement and an EndElement ("a") is created.
*
* @return The tag name of the opening tag for which this StartElement object was created.
*/
const String& name() const
{return _name;}
/**
* @brief Sets the tag name of the end start for which this StartElement object was created.
* @param name The new name for this StartElement object.
*/
void setName(const String name)
{_name = name;}
/**
* @brief Add the given attribute to the attribute list of this start tag.
*
* This StartElement object holds a list of attributes, which consist of the attribute name
* and the attribute value. The attributes can be read using attributes() or attribute().
*
* @param attribute The attribute which is added to this object's attribute list.
*/
void addAttribute(const Attribute& attribute)
{_attributes.push_back(attribute);}
/**
* @brief Returns the attribute list of this StartElement which contains all attributes of the tag.
*
* This StartElement object holds a list of attributes, which consist of the attribute name
* and the attribute value. This method returns all attributes of the represented tag. The list
* can be iterated using a iterator. To access a specific attribute the method attribute() can be
* used.
*
* @return A list containing all attributes of the tag this StartElement represents.
*/
const std::list<Attribute>& attributes() const
{return _attributes;}
/**
* @brief Returns the value of the attribute with the given name.
*
* This StartElement object holds a list of attributes, which consist of the attribute name
* and the attribute value. This methods returns the value of a single attribute. To access
* all attributes of this StartElement the method attributes() can be used.
*
* If no attribute with the given name exists, an empty string is returned.
*
* @param attributeName The value of the attribute with this name is returned.
* @return The value of the request attribute; or an empty string if there is no attribute
* with this name.
*/
const String& attribute(const String attributeName) const;
/**
* @return Checks if the StartElement has an attribute with the given name.
*
* This method returns $true$ if an attribute with the given name exists in this
* StartElement. If no attribute with this name exist $false$ is returned.
*
* @param attributeName It is checked if an attribute with this attribute name exists.
* @return $true$ if an attribute with this name exists; $false$ otherwise.
*/
bool hasAttribute(const String attributeName) const;
/**
* @brief Returns the namespace conText of this StartElement.
*
* @return NamespaceContext The namespace conText of this StartElment.
* @see NamespaceContext
*/
const NamespaceContext& namespaceContext() const
{return _namespaceContext;}
/**
* @brief Sets the namespace conText for this StartElement.
*
* @param conText The new namespace conText for this StartElment.
* @see NamespaceContext
*/
void setNamespaceContext(const NamespaceContext& conText)
{_namespaceContext = conText;}
/**
* @brief Returns the namespace uri for the given tag prefix in this StartElments namespace conText.
*
* The namespace uri is determined using the method NamespaceContext::namespaceUri().
* If no namespace uri exists for this prefix an empty string is returned.
*
* @param prefix The prefix for which the namespace uri is returned.
* @return The namespace uri for the given prefix; or an empty string if no namespace uri exists
* for this prefix.
*/
const String& namespaceUri(const String& prefix) const
{return _namespaceContext.namespaceUri(prefix);}
/**
* @brief Compares this StartElement object with the given node.
*
* This method returns $true$ if the given node also is a StartElement object and
* the content of both StartElement objects is the same. Otherwise it returns $false$.
*
* @param node This Node object is compared to the current StartElement node object.
* @return $true if this StartElement object is the same as the given node.
*/
virtual bool operator==(const Node& node) const;
private:
//! The name of the underlying tag.
String _name;
//! The list which contains all attributes of the underlying tag.
std::list<Attribute> _attributes;
//! The namespace conText of this StartElement.
NamespaceContext _namespaceContext;
};
}
}
#endif
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