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juce::XmlDocument Class Reference

`#include <juce_XmlDocument.h>`

## Public Member Functions

| XmlDocument (const String &documentText)
| XmlDocument (const File &file)
| ~XmlDocument ()
std::unique_ptr< XmlElement > | getDocumentElement (bool onlyReadOuterDocumentElement=false)
std::unique_ptr< XmlElement > | getDocumentElementIfTagMatches (StringRef requiredTag)
const String & | getLastParseError () const noexcept
void | setInputSource (InputSource *newSource) noexcept
void | setEmptyTextElementsIgnored (bool shouldBeIgnored) noexcept

## Static Public Member Functions

static std::unique_ptr< XmlElement > | parse (const File &file)
static std::unique_ptr< XmlElement > | parse (const String &xmlData)

## Detailed Description

Parses a text-based XML document and creates an XmlElement object from it.

The parser will parse DTDs to load external entities but won't check the document for validity against the DTD.

e.g.

XmlDocument myDocument (File ("myfile.xml"));
if (auto mainElement = myDocument.getDocumentElement())
{
..use the element
}
else
{
String error = myDocument.getLastParseError();
}
juce::File
Definition juce_File.h:45
juce::String
Definition juce_String.h:53
juce::XmlDocument::XmlDocument
XmlDocument(const String &documentText)
Definition juce_XmlDocument.cpp:26

Or you can use the helper functions for much less verbose parsing..

if (auto xml = parseXML (myXmlFile))
{
if (xml->hasTagName ("foobar"))
{
...etc
}
}

See also
  XmlElement

Definition at line 63 of file juce_XmlDocument.h.

## Constructor & Destructor Documentation

## XmlDocument() [1/2]

juce::XmlDocument::XmlDocument | ( | const String & | documentText | ) |

Creates an XmlDocument from the xml text. The text doesn't actually get parsed until the getDocumentElement() method is called.

Definition at line 26 of file juce_XmlDocument.cpp.

Referenced by parse(), and parse().

## XmlDocument() [2/2]

juce::XmlDocument::XmlDocument | ( | const File & | file | ) |

Creates an XmlDocument from a file. The text doesn't actually get parsed until the getDocumentElement() method is called.

Definition at line 27 of file juce_XmlDocument.cpp.

## ~XmlDocument()

juce::XmlDocument::~XmlDocument | ( |  | ) |

Destructor.

Definition at line 29 of file juce_XmlDocument.cpp.

## Member Function Documentation

## getDocumentElement()

std::unique_ptr< XmlElement > juce::XmlDocument::getDocumentElement | ( | bool | onlyReadOuterDocumentElement = false | ) |

Creates an XmlElement object to represent the main document node.

This method will do the actual parsing of the text, and if there's a parse error, it may returns nullptr (and you can find out the error using the getLastParseError() method).

See also the parse() methods, which provide a shorthand way to quickly parse a file or string.

Parameters

  onlyReadOuterDocumentElement | if true, the parser will only read the first section of the file, and will only return the outer document element - this allows quick checking of large files to see if they contain the correct type of tag, without having to parse the entire file

Returns
  a new XmlElement, or nullptr if there was an error.

See also
  getLastParseError, getDocumentElementIfTagMatches

Definition at line 110 of file juce_XmlDocument.cpp.

Referenced by getDocumentElementIfTagMatches().

## getDocumentElementIfTagMatches()

std::unique_ptr< XmlElement > juce::XmlDocument::getDocumentElementIfTagMatches | ( | StringRef | requiredTag | ) |

Does an inexpensive check to see whether the outer element has the given tag name, and then does a full parse if it matches. If the tag is different, or the XML parse fails, this will return nullptr.

Definition at line 150 of file juce_XmlDocument.cpp.

## getLastParseError()

const String & juce::XmlDocument::getLastParseError | ( |  | ) | const

noexcept

Returns the parsing error that occurred the last time getDocumentElement was called.

Returns
  the error, or an empty string if there was no error.

Definition at line 159 of file juce_XmlDocument.cpp.

## parse() [1/2]

std::unique_ptr< XmlElement > juce::XmlDocument::parse | ( | const File & | file | ) |

static

A handy static method that parses a file. This is a shortcut for creating an XmlDocument object and calling getDocumentElement() on it.

Returns
  a new XmlElement, or nullptr if there was an error.

Definition at line 31 of file juce_XmlDocument.cpp.

## parse() [2/2]

std::unique_ptr< XmlElement > juce::XmlDocument::parse | ( | const String & | xmlData | ) |

static

A handy static method that parses some XML data. This is a shortcut for creating an XmlDocument object and calling getDocumentElement() on it.

Returns
  a new XmlElement, or nullptr if there was an error.

Definition at line 36 of file juce_XmlDocument.cpp.

## setEmptyTextElementsIgnored()

void juce::XmlDocument::setEmptyTextElementsIgnored | ( | bool | shouldBeIgnored | ) |

noexcept

Sets a flag to change the treatment of empty text elements.

If this is true (the default state), then any text elements that contain only whitespace characters will be ignored during parsing. If you need to catch whitespace-only text, then you should set this to false before calling the getDocumentElement() method.

Definition at line 66 of file juce_XmlDocument.cpp.

## setInputSource()

void juce::XmlDocument::setInputSource | ( | InputSource * | newSource | ) |

noexcept

Sets an input source object to use for parsing documents that reference external entities.

If the document has been created from a file, this probably won't be needed, but if you're parsing some text and there might be a DTD that references external files, you may need to create a custom input source that can retrieve the other files it needs.

The object that is passed-in will be deleted automatically when no longer needed.

See also
  InputSource

Definition at line 61 of file juce_XmlDocument.cpp.

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

- juce_XmlDocument.h
- juce_XmlDocument.cpp