Library: Util
Package: Configuration
Header: Poco/Util/XMLConfiguration.h
Description
This configuration class extracts configuration properties from an XML document. An XPath-like syntax for property names is supported to allow full access to the XML document. XML namespaces are not supported. The name of the root element of the XML document is not significant and ignored. Periods in tag names are not supported.
Given the following XML document as an example:
<config>
<prop1>value1</prop1>
<prop2>value2</prop2>
<prop3>
<prop4 attr="value3"/>
<prop4 attr="value4"/>
</prop3>
<prop5 id="first">value5</prop5>
<prop5 id="second">value6</prop5>
</config>
The following property names would be valid and would yield the shown values:
prop1 -> value1 prop2 -> value2 prop3.prop4 -> (empty string) prop3.prop4[@attr] -> value3 prop3.prop4[1][@attr] -> value4 prop5[0] -> value5 prop5[1] -> value6 prop5[@id=first] -> value5 prop5[@id='second'] -> value6
Enumerating attributes is not supported. Calling keys("prop3.prop4") will return an empty range.
As a special feature, the delimiter character used to delimit property names can be changed to something other than period ('.') by passing the desired character to the constructor. This allows working with XML documents having element names with periods in them.
Inheritance
Direct Base Classes: AbstractConfiguration
All Base Classes: Poco::RefCountedObject, AbstractConfiguration
Member Summary
Member Functions: enumerate, getRaw, load, loadEmpty, removeRaw, save, setRaw
Inherited Functions: createLocalView, createView, duplicate, enableEvents, enumerate, eventsEnabled, expand, getBool, getDouble, getInt, getInt16, getInt32, getInt64, getRaw, getRawString, getString, getUInt, getUInt16, getUInt32, getUInt64, has, hasOption, hasProperty, keys, parseBool, parseInt, parseInt16, parseInt64, parseUInt, parseUInt16, parseUInt64, referenceCount, release, remove, removeRaw, setBool, setDouble, setInt, setInt16, setInt32, setInt64, setRaw, setRawWithEvent, setString, setUInt, setUInt16, setUInt32, setUInt64
Constructors
XMLConfiguration
Creates an empty XMLConfiguration with a "config" root element.
XMLConfiguration
XMLConfiguration(
char delim
);
Creates an empty XMLConfiguration with a "config" root element, using the given delimiter char instead of the default '.'.
XMLConfiguration
XMLConfiguration(
Poco::XML::InputSource * pInputSource
);
Creates an XMLConfiguration and loads the XML document from the given InputSource.
XMLConfiguration
XMLConfiguration(
std::istream & istr
);
Creates an XMLConfiguration and loads the XML document from the given stream.
XMLConfiguration
XMLConfiguration(
const std::string & path
);
Creates an XMLConfiguration and loads the XML document from the given path.
XMLConfiguration
XMLConfiguration(
const Poco::XML::Document * pDocument
);
Creates the XMLConfiguration using the given XML document.
XMLConfiguration
XMLConfiguration(
const Poco::XML::Node * pNode
);
Creates the XMLConfiguration using the given XML node.
XMLConfiguration
XMLConfiguration(
Poco::XML::InputSource * pInputSource,
char delim
);
Creates an XMLConfiguration and loads the XML document from the given InputSource. Uses the given delimiter char instead of the default '.'.
XMLConfiguration
XMLConfiguration(
std::istream & istr,
char delim
);
Creates an XMLConfiguration and loads the XML document from the given stream. Uses the given delimiter char instead of the default '.'.
XMLConfiguration
XMLConfiguration(
const std::string & path,
char delim
);
Creates an XMLConfiguration and loads the XML document from the given path. Uses the given delimiter char instead of the default '.'.
XMLConfiguration
XMLConfiguration(
const Poco::XML::Document * pDocument,
char delim
);
Creates the XMLConfiguration using the given XML document. Uses the given delimiter char instead of the default '.'.
XMLConfiguration
XMLConfiguration(
const Poco::XML::Node * pNode,
char delim
);
Creates the XMLConfiguration using the given XML node. Uses the given delimiter char instead of the default '.'.
Destructor
~XMLConfiguration 
~XMLConfiguration();
Member Functions
load
void load(
Poco::XML::InputSource * pInputSource
);
Loads the XML document containing the configuration data from the given InputSource.
load
void load(
Poco::XML::InputSource * pInputSource,
unsigned long namePoolSize
);
Loads the XML document containing the configuration data from the given InputSource. Uses the give namePoolSize (which should be a suitable prime like 251, 509, 1021, 4093) for the internal DOM Document's name pool.
load
void load(
std::istream & istr
);
Loads the XML document containing the configuration data from the given stream.
load
void load(
const std::string & path
);
Loads the XML document containing the configuration data from the given file.
load
void load(
const Poco::XML::Document * pDocument
);
load
void load(
const Poco::XML::Node * pNode
);
loadEmpty
void loadEmpty(
const std::string & rootElementName
);
Loads an empty XML document containing only the root element with the given name.
save
void save(
const std::string & path
) const;
Writes the XML document containing the configuration data to the file given by path.
save
void save(
std::ostream & str
) const;
Writes the XML document containing the configuration data to the given stream.
save
void save(
Poco::XML::DOMWriter & writer,
const std::string & path
) const;
Writes the XML document containing the configuration data to the file given by path, using the given DOMWriter.
This can be used to use a DOMWriter with custom options.
save
void save(
Poco::XML::DOMWriter & writer,
std::ostream & str
) const;
Writes the XML document containing the configuration data to the given stream.
This can be used to use a DOMWriter with custom options.
enumerate
void enumerate(
const std::string & key,
Keys & range
) const;
getRaw
bool getRaw(
const std::string & key,
std::string & value
) const;
removeRaw
void removeRaw(
const std::string & key
);
setRaw
void setRaw(
const std::string & key,
const std::string & value
);