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// Attributes.h
//
// Library: XML
// Package: SAX
// Module: SAX
//
// SAX2 Attributes Interface.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef SAX_Attributes_INCLUDED
#define SAX_Attributes_INCLUDED
#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"
namespace Poco {
namespace XML {
class XML_API Attributes
/// Interface for a list of XML attributes.
/// This interface allows access to a list of attributes in three different ways:
/// 1.by attribute index;
/// 2.by Namespace-qualified name; or
/// 3.by qualified (prefixed) name.
///
/// The list will not contain attributes that were declared #IMPLIED but not
/// specified in the start tag. It will also not contain
/// attributes used as Namespace declarations (xmlns*) unless the
/// http://xml.org/sax/features/namespace-prefixes
/// feature is set to true (it is false by default).
///
/// If the namespace-prefixes feature (see above) is false, access by
/// qualified name may not be available; if the
/// http://xml.org/sax/features/namespaces feature is false, access by
/// Namespace-qualified names may not be available.
/// This interface replaces the now-deprecated SAX1 AttributeList interface,
/// which does not contain Namespace support. In
/// addition to Namespace support, it adds the getIndex methods (below).
/// The order of attributes in the list is unspecified, and will vary from
/// implementation to implementation.
{
public:
virtual int getIndex(const XMLString& name) const = 0;
/// Look up the index of an attribute by a qualified name.
virtual int getIndex(const XMLString& namespaceURI, const XMLString& localName) const = 0;
/// Look up the index of an attribute by a namspace name.
virtual int getLength() const = 0;
/// Return the number of attributes in the list.
///
/// Once you know the number of attributes, you can iterate through the list.
virtual const XMLString& getLocalName(int i) const = 0;
/// Look up a local attribute name by index.
virtual const XMLString& getQName(int i) const = 0;
/// Look up a qualified attribute name by index.
virtual const XMLString& getType(int i) const = 0;
/// Look up an attribute type by index.
///
/// The attribute type is one of the strings "CDATA", "ID", "IDREF", "IDREFS", "NMTOKEN",
/// "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION" (always in upper case).
///
/// If the parser has not read a declaration for the attribute, or if the parser does not
/// report attribute types, then it must return the value "CDATA" as stated in the XML 1.0
/// Recommendation (clause 3.3.3, "Attribute-Value Normalization").
///
/// For an enumerated attribute that is not a notation, the parser will report the type
/// as "NMTOKEN".
virtual const XMLString& getType(const XMLString& qname) const = 0;
/// Look up an attribute type by a qualified name.
///
/// See getType(int) for a description of the possible types.
virtual const XMLString& getType(const XMLString& namespaceURI, const XMLString& localName) const = 0;
/// Look up an attribute type by a namespace name.
///
/// See getType(int) for a description of the possible types.
virtual const XMLString& getValue(int i) const = 0;
/// Look up an attribute value by index.
///
/// If the attribute value is a list of tokens (IDREFS, ENTITIES, or NMTOKENS), the tokens
/// will be concatenated into a single string with each token separated by a single space.
virtual const XMLString& getValue(const XMLString& qname) const = 0;
/// Look up an attribute value by a qualified name.
///
/// See getValue(int) for a description of the possible values.
virtual const XMLString& getValue(const XMLString& uri, const XMLString& localName) const = 0;
/// Look up an attribute value by a namespace name.
///
/// See getValue(int) for a description of the possible values.
virtual const XMLString& getURI(int i) const = 0;
/// Look up a namespace URI by index.
protected:
virtual ~Attributes();
};
} } // namespace Poco::XML
#endif // SAX_Attributes_INCLUDED
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