Android APIs
public class

Driver

extends Object
implements Attributes Locator XMLReader
java.lang.Object
   ↳ org.xmlpull.v1.sax2.Driver

Class Overview

SAX2 Driver that pulls events from XmlPullParser and comverts them into SAX2 callbacks.

Summary

Constants
String APACHE_DYNAMIC_VALIDATION_FEATURE
String APACHE_SCHEMA_VALIDATION_FEATURE
String DECLARATION_HANDLER_PROPERTY
String LEXICAL_HANDLER_PROPERTY
String NAMESPACES_FEATURE
String NAMESPACE_PREFIXES_FEATURE
String VALIDATION_FEATURE
Fields
protected ContentHandler contentHandler
protected ErrorHandler errorHandler
protected XmlPullParser pp
protected String systemId
Public Constructors
Driver()
Driver(XmlPullParser pp)
Public Methods
int getColumnNumber()
Return the column number where the current document event ends.
ContentHandler getContentHandler()
Return the current content handler.
DTDHandler getDTDHandler()
Return the current DTD handler.
EntityResolver getEntityResolver()
Return the current entity resolver.
ErrorHandler getErrorHandler()
Return the current error handler.
boolean getFeature(String name)
Look up the value of a feature flag.
int getIndex(String qName)
Look up the index of an attribute by XML qualified (prefixed) name.
int getIndex(String uri, String localName)
Look up the index of an attribute by Namespace name.
int getLength()
Return the number of attributes in the list.
int getLineNumber()
Return the line number where the current document event ends.
String getLocalName(int index)
Look up an attribute's local name by index.
Object getProperty(String name)
Look up the value of a property.
String getPublicId()
Return the public identifier for the current document event.
String getQName(int index)
Look up an attribute's XML qualified (prefixed) name by index.
String getSystemId()
Return the system identifier for the current document event.
String getType(String qName)
Look up an attribute's type by XML qualified (prefixed) name.
String getType(String uri, String localName)
Look up an attribute's type by Namespace name.
String getType(int index)
Look up an attribute's type by index.
String getURI(int index)
Look up an attribute's Namespace URI by index.
String getValue(String qName)
Look up an attribute's value by XML qualified (prefixed) name.
String getValue(String uri, String localName)
Look up an attribute's value by Namespace name.
String getValue(int index)
Look up an attribute's value by index.
void parse(String systemId)
Parse an XML document from a system identifier (URI).
void parse(InputSource source)
Parse an XML document.
void parseSubTree(XmlPullParser pp)
void setContentHandler(ContentHandler handler)
Allow an application to register a content event handler.
void setDTDHandler(DTDHandler handler)
Allow an application to register a DTD event handler.
void setEntityResolver(EntityResolver resolver)
Allow an application to register an entity resolver.
void setErrorHandler(ErrorHandler handler)
Allow an application to register an error event handler.
void setFeature(String name, boolean value)
Set the value of a feature flag.
void setProperty(String name, Object value)
Set the value of a property.
Protected Methods
void startElement(String namespace, String localName, String qName)
Calls startElement on the ContentHandler with this driver object as the Attributes implementation.
[Expand]
Inherited Methods
From class java.lang.Object
From interface org.xml.sax.Attributes
From interface org.xml.sax.Locator
From interface org.xml.sax.XMLReader

Constants

protected static final String APACHE_DYNAMIC_VALIDATION_FEATURE

Added in API level 1

Constant Value: "http://apache.org/xml/features/validation/dynamic"

protected static final String APACHE_SCHEMA_VALIDATION_FEATURE

Added in API level 1

Constant Value: "http://apache.org/xml/features/validation/schema"

protected static final String DECLARATION_HANDLER_PROPERTY

Added in API level 1

Constant Value: "http://xml.org/sax/properties/declaration-handler"

protected static final String LEXICAL_HANDLER_PROPERTY

Added in API level 1

Constant Value: "http://xml.org/sax/properties/lexical-handler"

protected static final String NAMESPACES_FEATURE

Added in API level 1

Constant Value: "http://xml.org/sax/features/namespaces"

protected static final String NAMESPACE_PREFIXES_FEATURE

Added in API level 1

Constant Value: "http://xml.org/sax/features/namespace-prefixes"

protected static final String VALIDATION_FEATURE

Added in API level 1

Constant Value: "http://xml.org/sax/features/validation"

Fields

protected ContentHandler contentHandler

Added in API level 1

protected ErrorHandler errorHandler

Added in API level 1

protected XmlPullParser pp

Added in API level 1

protected String systemId

Added in API level 1

Public Constructors

public Driver ()

Added in API level 1

public Driver (XmlPullParser pp)

Added in API level 1

Public Methods

public int getColumnNumber ()

Added in API level 1

Return the column number where the current document event ends. This is one-based number of Java char values since the last line end.

Warning: The return value from the method is intended only as an approximation for the sake of diagnostics; it is not intended to provide sufficient information to edit the character content of the original XML document. For example, when lines contain combining character sequences, wide characters, surrogate pairs, or bi-directional text, the value may not correspond to the column in a text editor's display.

The return value is an approximation of the column number in the document entity or external parsed entity where the markup triggering the event appears.

If possible, the SAX driver should provide the line position of the first character after the text associated with the document event. The first column in each line is column 1.

Returns
  • The column number, or -1 if none is available.

public ContentHandler getContentHandler ()

Added in API level 1

Return the current content handler.

Returns
  • The current content handler, or null if none has been registered.

public DTDHandler getDTDHandler ()

Added in API level 1

Return the current DTD handler.

Returns
  • The current DTD handler, or null if none has been registered.

public EntityResolver getEntityResolver ()

Added in API level 1

Return the current entity resolver.

Returns
  • The current entity resolver, or null if none has been registered.

public ErrorHandler getErrorHandler ()

Added in API level 1

Return the current error handler.

Returns
  • The current error handler, or null if none has been registered.

public boolean getFeature (String name)

Added in API level 1

Look up the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for an XMLReader to recognize a feature name but temporarily be unable to return its value. Some feature values may be available only in specific contexts, such as before, during, or after a parse. Also, some feature values may not be programmatically accessible. (In the case of an adapter for SAX1 Parser, there is no implementation-independent way to expose whether the underlying parser is performing validation, expanding external entities, and so forth.)

All XMLReaders are required to recognize the http://xml.org/sax/features/namespaces and the http://xml.org/sax/features/namespace-prefixes feature names.

Typical usage is something like this:

 XMLReader r = new MySAXDriver();

                         // try to activate validation
 try {
   r.setFeature("http://xml.org/sax/features/validation", true);
 } catch (SAXException e) {
   System.err.println("Cannot activate validation.");
 }

                         // register event handlers
 r.setContentHandler(new MyContentHandler());
 r.setErrorHandler(new MyErrorHandler());

                         // parse the first document
 try {
   r.parse("http://www.foo.com/mydoc.xml");
 } catch (IOException e) {
   System.err.println("I/O exception reading XML document");
 } catch (SAXException e) {
   System.err.println("XML exception reading document.");
 }
 

Implementors are free (and encouraged) to invent their own features, using names built on their own URIs.

Parameters
name The feature name, which is a fully-qualified URI.
Returns
  • The current value of the feature (true or false).

public int getIndex (String qName)

Added in API level 1

Look up the index of an attribute by XML qualified (prefixed) name.

Parameters
qName The qualified (prefixed) name.
Returns
  • The index of the attribute, or -1 if it does not appear in the list.

public int getIndex (String uri, String localName)

Added in API level 1

Look up the index of an attribute by Namespace name.

Parameters
uri The Namespace URI, or the empty string if the name has no Namespace URI.
localName The attribute's local name.
Returns
  • The index of the attribute, or -1 if it does not appear in the list.

public int getLength ()

Added in API level 1

Return the number of attributes in the list.

Once you know the number of attributes, you can iterate through the list.

Returns
  • The number of attributes in the list.

public int getLineNumber ()

Added in API level 1

Return the line number where the current document event ends. Lines are delimited by line ends, which are defined in the XML specification.

Warning: The return value from the method is intended only as an approximation for the sake of diagnostics; it is not intended to provide sufficient information to edit the character content of the original XML document. In some cases, these "line" numbers match what would be displayed as columns, and in others they may not match the source text due to internal entity expansion.

The return value is an approximation of the line number in the document entity or external parsed entity where the markup triggering the event appears.

If possible, the SAX driver should provide the line position of the first character after the text associated with the document event. The first line is line 1.

Returns
  • The line number, or -1 if none is available.

public String getLocalName (int index)

Added in API level 1

Look up an attribute's local name by index.

Parameters
index The attribute index (zero-based).
Returns
  • The local name, or the empty string if Namespace processing is not being performed, or null if the index is out of range.

public Object getProperty (String name)

Added in API level 1

Look up the value of a property.

The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but temporarily be unable to return its value. Some property values may be available only in specific contexts, such as before, during, or after a parse.

XMLReaders are not required to recognize any specific property names, though an initial core set is documented for SAX2.

Implementors are free (and encouraged) to invent their own properties, using names built on their own URIs.

Parameters
name The property name, which is a fully-qualified URI.
Returns
  • The current value of the property.

public String getPublicId ()

Added in API level 1

Return the public identifier for the current document event.

The return value is the public identifier of the document entity or of the external parsed entity in which the markup triggering the event appears.

Returns
  • A string containing the public identifier, or null if none is available.

public String getQName (int index)

Added in API level 1

Look up an attribute's XML qualified (prefixed) name by index.

Parameters
index The attribute index (zero-based).
Returns
  • The XML qualified name, or the empty string if none is available, or null if the index is out of range.

public String getSystemId ()

Added in API level 1

Return the system identifier for the current document event.

The return value is the system identifier of the document entity or of the external parsed entity in which the markup triggering the event appears.

If the system identifier is a URL, the parser must resolve it fully before passing it to the application. For example, a file name must always be provided as a file:... URL, and other kinds of relative URI are also resolved against their bases.

Returns
  • A string containing the system identifier, or null if none is available.

public String getType (String qName)

Added in API level 1

Look up an attribute's type by XML qualified (prefixed) name.

See getType(int) for a description of the possible types.

Parameters
qName The XML qualified name.
Returns
  • The attribute type as a string, or null if the attribute is not in the list or if qualified names are not available.

public String getType (String uri, String localName)

Added in API level 1

Look up an attribute's type by Namespace name.

See getType(int) for a description of the possible types.

Parameters
uri The Namespace URI, or the empty String if the name has no Namespace URI.
localName The local name of the attribute.
Returns
  • The attribute type as a string, or null if the attribute is not in the list or if Namespace processing is not being performed.

public String getType (int index)

Added in API level 1

Look up an attribute's 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".

Parameters
index The attribute index (zero-based).
Returns
  • The attribute's type as a string, or null if the index is out of range.

public String getURI (int index)

Added in API level 1

Look up an attribute's Namespace URI by index.

Parameters
index The attribute index (zero-based).
Returns
  • The Namespace URI, or the empty string if none is available, or null if the index is out of range.

public String getValue (String qName)

Added in API level 1

Look up an attribute's value by XML qualified (prefixed) name.

See getValue(int) for a description of the possible values.

Parameters
qName The XML qualified name.
Returns
  • The attribute value as a string, or null if the attribute is not in the list or if qualified names are not available.

public String getValue (String uri, String localName)

Added in API level 1

Look up an attribute's value by Namespace name.

See getValue(int) for a description of the possible values.

Parameters
uri The Namespace URI, or the empty String if the name has no Namespace URI.
localName The local name of the attribute.
Returns
  • The attribute value as a string, or null if the attribute is not in the list.

public String getValue (int index)

Added in API level 1

Look up an attribute's 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.

Parameters
index The attribute index (zero-based).
Returns
  • The attribute's value as a string, or null if the index is out of range.

public void parse (String systemId)

Added in API level 1

Parse an XML document from a system identifier (URI).

This method is a shortcut for the common case of reading a document from a system identifier. It is the exact equivalent of the following:

 parse(new InputSource(systemId));
 

If the system identifier is a URL, it must be fully resolved by the application before it is passed to the parser.

Parameters
systemId The system identifier (URI).

public void parse (InputSource source)

Added in API level 1

Parse an XML document.

The application can use this method to instruct the XML reader to begin parsing an XML document from any valid input source (a character stream, a byte stream, or a URI).

Applications may not invoke this method while a parse is in progress (they should create a new XMLReader instead for each nested XML document). Once a parse is complete, an application may reuse the same XMLReader object, possibly with a different input source. Configuration of the XMLReader object (such as handler bindings and values established for feature flags and properties) is unchanged by completion of a parse, unless the definition of that aspect of the configuration explicitly specifies other behavior. (For example, feature flags or properties exposing characteristics of the document being parsed.)

During the parse, the XMLReader will provide information about the XML document through the registered event handlers.

This method is synchronous: it will not return until parsing has ended. If a client application wants to terminate parsing early, it should throw an exception.

Parameters
source The input source for the top-level of the XML document.

public void parseSubTree (XmlPullParser pp)

Added in API level 1

public void setContentHandler (ContentHandler handler)

Added in API level 1

Allow an application to register a content event handler.

If the application does not register a content handler, all content events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Parameters
handler The content handler.

public void setDTDHandler (DTDHandler handler)

Added in API level 1

Allow an application to register a DTD event handler.

If the application does not register a DTD handler, all DTD events reported by the SAX parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Parameters
handler The DTD handler.

public void setEntityResolver (EntityResolver resolver)

Added in API level 1

Allow an application to register an entity resolver.

If the application does not register an entity resolver, the XMLReader will perform its own default resolution.

Applications may register a new or different resolver in the middle of a parse, and the SAX parser must begin using the new resolver immediately.

Parameters
resolver The entity resolver.

public void setErrorHandler (ErrorHandler handler)

Added in API level 1

Allow an application to register an error event handler.

If the application does not register an error handler, all error events reported by the SAX parser will be silently ignored; however, normal processing may not continue. It is highly recommended that all SAX applications implement an error handler to avoid unexpected bugs.

Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.

Parameters
handler The error handler.

public void setFeature (String name, boolean value)

Added in API level 1

Set the value of a feature flag.

The feature name is any fully-qualified URI. It is possible for an XMLReader to expose a feature value but to be unable to change the current value. Some feature values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.

All XMLReaders are required to support setting http://xml.org/sax/features/namespaces to true and http://xml.org/sax/features/namespace-prefixes to false.

Parameters
name The feature name, which is a fully-qualified URI.
value The requested value of the feature (true or false).

public void setProperty (String name, Object value)

Added in API level 1

Set the value of a property.

The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but to be unable to change the current value. Some property values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.

XMLReaders are not required to recognize setting any specific property names, though a core set is defined by SAX2.

This method is also the standard mechanism for setting extended handlers.

Parameters
name The property name, which is a fully-qualified URI.
value The requested value for the property.

Protected Methods

protected void startElement (String namespace, String localName, String qName)

Added in API level 1

Calls startElement on the ContentHandler with this driver object as the Attributes implementation. In default implementation Attributes object is valid only during this method call and may not be stored. Sub-classes can overwrite this method to cache attributes.

Throws
SAXException