com.trolltech.qt.xml
Class QDomImplementation

java.lang.Object
  extended by com.trolltech.qt.internal.QSignalEmitterInternal
      extended by com.trolltech.qt.QSignalEmitter
          extended by com.trolltech.qt.QtJambiObject
              extended by com.trolltech.qt.xml.QDomImplementation
All Implemented Interfaces:
QtJambiInterface, java.lang.Cloneable

public class QDomImplementation
extends QtJambiObject
implements java.lang.Cloneable

The QDomImplementation class provides information about the features of the DOM implementation. This class describes the features that are supported by the DOM implementation. Currently the XML subset of DOM Level 1 and DOM Level 2 Core are supported.

Normally you will use the function QDomDocument::implementation() to get the implementation object.

You can create a new document type with createDocumentType() and a new document with createDocument().

For further information about the Document Object Model see Level 1 and Level 2 Core. For a more general introduction of the DOM implementation see the QDomDocument documentation.

The QDom classes have a few issues of nonconformance with the XML specifications that cannot be fixed in Qt 4 without breaking backward  compatibility. The QtXmlPatterns module and the QXmlStreamReader and  QXmlStreamWriter classes have a higher degree of a conformance.

See also:
hasFeature().


Nested Class Summary
static class QDomImplementation.InvalidDataPolicy
          This enum specifies what should be done when a factory function in QDomDocument is called with invalid data.
 
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9
 
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal
 
Field Summary
 
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
currentSender
 
Constructor Summary
QDomImplementation()
          Constructs a QDomImplementation object.
QDomImplementation(QDomImplementation arg__1)
          Constructs a copy of x.
 
Method Summary
 QDomImplementation clone()
          This method is reimplemented for internal reasons
 QDomDocument createDocument(java.lang.String nsURI, java.lang.String qName, QDomDocumentType doctype)
          Creates a DOM document with the document type doctype.
 QDomDocumentType createDocumentType(java.lang.String qName, java.lang.String publicId, java.lang.String systemId)
          Creates a document type node for the name qName.
 boolean hasFeature(java.lang.String feature, java.lang.String version)
          The function returns true if QDom implements the requested version of a feature; otherwise returns false.
static QDomImplementation.InvalidDataPolicy invalidDataPolicy()
          Returns the invalid data policy, which specifies what should be done when a factory function in QDomDocument is passed invalid data.
 boolean isNull()
          Returns false if the object was created by QDomDocument::implementation(); otherwise returns true.
static void setInvalidDataPolicy(QDomImplementation.InvalidDataPolicy policy)
          Sets the invalid data policy, which specifies what should be done when a factory function in QDomDocument is passed invalid data.
 
Methods inherited from class com.trolltech.qt.QtJambiObject
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr
 
Methods inherited from class com.trolltech.qt.QSignalEmitter
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread
 
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
__qt_signalInitialization
 
Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.trolltech.qt.QtJambiInterface
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership
 

Constructor Detail

QDomImplementation

public QDomImplementation()
Constructs a QDomImplementation object.


QDomImplementation

public QDomImplementation(QDomImplementation arg__1)
Constructs a copy of x.

Method Detail

createDocument

public final QDomDocument createDocument(java.lang.String nsURI,
                                         java.lang.String qName,
                                         QDomDocumentType doctype)
Creates a DOM document with the document type doctype. This function also adds a root element node with the qualified name qName and the namespace URI nsURI.


createDocumentType

public final QDomDocumentType createDocumentType(java.lang.String qName,
                                                 java.lang.String publicId,
                                                 java.lang.String systemId)
Creates a document type node for the name qName.

publicId specifies the public identifier of the external subset. If you specify an empty string (QString()) as the publicId, this means that the document type has no public identifier.

systemId specifies the system identifier of the external subset. If you specify an empty string as the systemId, this means that the document type has no system identifier.

Since you cannot have a public identifier without a system identifier, the public identifier is set to an empty string if there is no system identifier.

DOM level 2 does not support any other document type declaration features.

The only way you can use a document type that was created this way, is in combination with the createDocument() function to create a QDomDocument with this document type.

In the DOM specification, this is the only way to create a non-null document. For historical reasons, Qt also allows to create the document using the default empty constructor. The resulting document is null, but becomes non-null when a factory function, for example QDomDocument::createElement(), is called. The document also becomes non-null when setContent() is called.

See also:
createDocument().


hasFeature

public final boolean hasFeature(java.lang.String feature,
                                java.lang.String version)
The function returns true if QDom implements the requested version of a feature; otherwise returns false.

The currently supported features and their versions:

Feature
Version
XML 1.0


isNull

public final boolean isNull()
Returns false if the object was created by QDomDocument::implementation(); otherwise returns true.


invalidDataPolicy

public static QDomImplementation.InvalidDataPolicy invalidDataPolicy()
Returns the invalid data policy, which specifies what should be done when a factory function in QDomDocument is passed invalid data.

See also:
setInvalidDataPolicy(), and InvalidDataPolicy .


setInvalidDataPolicy

public static void setInvalidDataPolicy(QDomImplementation.InvalidDataPolicy policy)
Sets the invalid data policy, which specifies what should be done when a factory function in QDomDocument is passed invalid data.

The policy is set for all instances of QDomDocument which already exist and which will be created in the future.

        QDomDocument doc = new QDomDocument();
        QDomImplementation impl = new QDomImplementation();

        // This will create the element, but the resulting XML document will
        // be invalid, because '~' is not a valid character in a tag name.
        impl.setInvalidDataPolicy(QDomImplementation.InvalidDataPolicy.AcceptInvalidChars);
        QDomElement elt1 = doc.createElement("foo~bar");

        // This will create an element with the tag name "foobar".
        impl.setInvalidDataPolicy(QDomImplementation.InvalidDataPolicy.DropInvalidChars);
        QDomElement elt2 = doc.createElement("foo~bar");

        // This will create a null element.
        impl.setInvalidDataPolicy(QDomImplementation.InvalidDataPolicy.ReturnNullNode);
        QDomElement elt3 = doc.createElement("foo~bar");

See also:
invalidDataPolicy(), and InvalidDataPolicy .


clone

public QDomImplementation clone()
This method is reimplemented for internal reasons

Overrides:
clone in class java.lang.Object