Package com.android.internal.util

Class FastXmlSerializer

java.lang.Object

com.android.internal.util.FastXmlSerializer

All Implemented Interfaces:

XmlSerializer

public class FastXmlSerializer
extends Object
implements XmlSerializer

This is a quick and dirty implementation of XmlSerializer that isn't horribly painfully slow like the normal one. It only does what is needed for the specific XML files being written with it.

Constructor Summary

Constructors

Constructor	Description
FastXmlSerializer()

Method Summary

Modifier and Type	Method	Description
XmlSerializer	attribute(String namespace, String name, String value)	Write an attribute.
void	cdsect(String text)
void	comment(String text)
void	docdecl(String text)
void	endDocument()	Finish writing.
XmlSerializer	endTag(String namespace, String name)	Write end tag.
void	entityRef(String text)
void	flush()	Write all pending output to the stream.
int	getDepth()	Returns the current depth of the element.
boolean	getFeature(String name)	Return the current value of the feature with given name.
String	getName()	Returns the name of the current element as set by startTag().
String	getNamespace()	Returns the namespace URI of the current element as set by startTag().
String	getPrefix(String namespace, boolean generatePrefix)	Return namespace that corresponds to given prefix If there is no prefix bound to this namespace return null but if generatePrefix is false then return generated prefix.
Object	getProperty(String name)	Look up the value of a property.
void	ignorableWhitespace(String text)
void	processingInstruction(String text)
void	setFeature(String name, boolean state)	Set feature identified by name (recommended to be URI for uniqueness).
void	setOutput(OutputStream os, String encoding)	Set to use binary output stream with given encoding.
void	setOutput(Writer writer)	Set the output to the given writer.
void	setPrefix(String prefix, String namespace)	Binds the given prefix to the given namespace.
void	setProperty(String name, Object value)	Set the value of a property.
void	startDocument(String encoding, Boolean standalone)	Write <?xml declaration with encoding (if encoding not null) and standalone flag (if standalone not null) This method can only be called just after setOutput.
XmlSerializer	startTag(String namespace, String name)	Writes a start tag with the given namespace and name.
XmlSerializer	text(char[] buf, int start, int len)	Writes text, where special XML chars are escaped automatically
XmlSerializer	text(String text)	Writes text, where special XML chars are escaped automatically

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FastXmlSerializer

public FastXmlSerializer()

Method Detail

attribute

public XmlSerializer attribute(String namespace,
                               String name,
                               String value)
                        throws IOException,
                               IllegalArgumentException,
                               IllegalStateException

Description copied from interface: XmlSerializer

Write an attribute. Calls to attribute() MUST follow a call to startTag() immediately. If there is no prefix defined for the given namespace, a prefix will be defined automatically. If namespace is null or empty string no namespace prefix is printed but just name.

Specified by:

attribute in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

cdsect

public void cdsect(String text)
            throws IOException,
                   IllegalArgumentException,
                   IllegalStateException

Specified by:

cdsect in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

comment

public void comment(String text)
             throws IOException,
                    IllegalArgumentException,
                    IllegalStateException

Specified by:

comment in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

docdecl

public void docdecl(String text)
             throws IOException,
                    IllegalArgumentException,
                    IllegalStateException

Specified by:

docdecl in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

endDocument

public void endDocument()
                 throws IOException,
                        IllegalArgumentException,
                        IllegalStateException

Description copied from interface: XmlSerializer

Finish writing. All unclosed start tags will be closed and output will be flushed. After calling this method no more output can be serialized until next call to setOutput()

Specified by:

endDocument in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

endTag

public XmlSerializer endTag(String namespace,
                            String name)
                     throws IOException,
                            IllegalArgumentException,
                            IllegalStateException

Description copied from interface: XmlSerializer

Write end tag. Repetition of namespace and name is just for avoiding errors.

Background: in kXML endTag had no arguments, and non matching tags were very difficult to find... If namespace is null no namespace prefix is printed but just name. If namespace is empty string then serializer will make sure that default empty namespace is declared (in XML 1.0 xmlns='').

Specified by:

endTag in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

entityRef

public void entityRef(String text)
               throws IOException,
                      IllegalArgumentException,
                      IllegalStateException

Specified by:

entityRef in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

flush

public void flush()
           throws IOException

Description copied from interface: XmlSerializer

Write all pending output to the stream. If method startTag() or attribute() was called then start tag is closed (final >) before flush() is called on underlying output stream.

NOTE: if there is need to close start tag (so no more attribute() calls are allowed) but without flushing output call method text() with empty string (text("")).

Specified by:

flush in interface XmlSerializer

Throws:

IOException

getDepth

public int getDepth()

Description copied from interface: XmlSerializer

Returns the current depth of the element. Outside the root element, the depth is 0. The depth is incremented by 1 when startTag() is called. The depth is decremented after the call to endTag() event was observed.

 <!-- outside -->     0
 <root>               1
   sometext                 1
     <foobar>         2
     </foobar>        2
 </root>              1
 <!-- outside -->     0
 

Specified by:

getDepth in interface XmlSerializer

getFeature

public boolean getFeature(String name)

Description copied from interface: XmlSerializer

Return the current value of the feature with given name.

NOTE: unknown properties are always returned as null

Specified by:

getFeature in interface XmlSerializer

Parameters:

name - The name of feature to be retrieved.

Returns:

The value of named feature.

getName

public String getName()

Description copied from interface: XmlSerializer

Returns the name of the current element as set by startTag(). It can only be null before first call to startTag() or when last endTag() is called to close first startTag().

Specified by:

getName in interface XmlSerializer

Returns:

namespace set by startTag() that is currently in scope

getNamespace

public String getNamespace()

Description copied from interface: XmlSerializer

Returns the namespace URI of the current element as set by startTag().

NOTE: that means in particular that:

• if there was startTag("", ...) then getNamespace() returns ""
• if there was startTag(null, ...) then getNamespace() returns null

Specified by:

getNamespace in interface XmlSerializer

Returns:

namespace set by startTag() that is currently in scope

getPrefix

public String getPrefix(String namespace,
                        boolean generatePrefix)
                 throws IllegalArgumentException

Description copied from interface: XmlSerializer

Return namespace that corresponds to given prefix If there is no prefix bound to this namespace return null but if generatePrefix is false then return generated prefix.

NOTE: if the prefix is empty string "" and default namespace is bound to this prefix then empty string ("") is returned.

NOTE: prefixes "xml" and "xmlns" are already bound will have values as defined Namespaces in XML specification

Specified by:

getPrefix in interface XmlSerializer

Throws:

IllegalArgumentException

getProperty

public Object getProperty(String name)

Description copied from interface: XmlSerializer

Look up the value of a property. The property name is any fully-qualified URI. I

NOTE: unknown properties are always returned as null

Specified by:

getProperty in interface XmlSerializer

Parameters:

name - The name of property to be retrieved.

Returns:

The value of named property.

ignorableWhitespace

public void ignorableWhitespace(String text)
                         throws IOException,
                                IllegalArgumentException,
                                IllegalStateException

Specified by:

ignorableWhitespace in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

processingInstruction

public void processingInstruction(String text)
                           throws IOException,
                                  IllegalArgumentException,
                                  IllegalStateException

Specified by:

processingInstruction in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

setFeature

public void setFeature(String name,
                       boolean state)
                throws IllegalArgumentException,
                       IllegalStateException

Description copied from interface: XmlSerializer

Set feature identified by name (recommended to be URI for uniqueness). Some well known optional features are defined in http://www.xmlpull.org/v1/doc/features.html. If feature is not recognized or can not be set then IllegalStateException MUST be thrown.

Specified by:

setFeature in interface XmlSerializer

Throws:

IllegalStateException - If the feature is not supported or can not be set

IllegalArgumentException

setOutput

public void setOutput(OutputStream os,
                      String encoding)
               throws IOException,
                      IllegalArgumentException,
                      IllegalStateException

Description copied from interface: XmlSerializer

Set to use binary output stream with given encoding.

Specified by:

setOutput in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

setOutput

public void setOutput(Writer writer)
               throws IOException,
                      IllegalArgumentException,
                      IllegalStateException

Description copied from interface: XmlSerializer

Set the output to the given writer.

WARNING no information about encoding is available!

Specified by:

setOutput in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

setPrefix

public void setPrefix(String prefix,
                      String namespace)
               throws IOException,
                      IllegalArgumentException,
                      IllegalStateException

Description copied from interface: XmlSerializer

Binds the given prefix to the given namespace. This call is valid for the next element including child elements. The prefix and namespace MUST be always declared even if prefix is not used in element (startTag() or attribute()) - for XML 1.0 it must result in declaring xmlns:prefix='namespace' (or xmlns:prefix="namespace" depending what character is used to quote attribute value).

NOTE: this method MUST be called directly before startTag() and if anything but startTag() or setPrefix() is called next there will be exception.

NOTE: prefixes "xml" and "xmlns" are already bound and can not be redefined see: Namespaces in XML Errata.

NOTE: to set default namespace use as prefix empty string.

Specified by:

setPrefix in interface XmlSerializer

Parameters:

prefix - must be not null (or IllegalArgumentException is thrown)

namespace - must be not null

Throws:

IOException

IllegalArgumentException

IllegalStateException

setProperty

public void setProperty(String name,
                        Object value)
                 throws IllegalArgumentException,
                        IllegalStateException

Description copied from interface: XmlSerializer

Set the value of a property. (the property name is recommended to be URI for uniqueness). Some well known optional properties are defined in http://www.xmlpull.org/v1/doc/properties.html. If property is not recognized or can not be set then IllegalStateException MUST be thrown.

Specified by:

setProperty in interface XmlSerializer

Throws:

IllegalStateException - if the property is not supported or can not be set

IllegalArgumentException

startDocument

public void startDocument(String encoding,
                          Boolean standalone)
                   throws IOException,
                          IllegalArgumentException,
                          IllegalStateException

Description copied from interface: XmlSerializer

Write <?xml declaration with encoding (if encoding not null) and standalone flag (if standalone not null) This method can only be called just after setOutput.

Specified by:

startDocument in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

startTag

public XmlSerializer startTag(String namespace,
                              String name)
                       throws IOException,
                              IllegalArgumentException,
                              IllegalStateException

Description copied from interface: XmlSerializer

Writes a start tag with the given namespace and name. If there is no prefix defined for the given namespace, a prefix will be defined automatically. The explicit prefixes for namespaces can be established by calling setPrefix() immediately before this method. If namespace is null no namespace prefix is printed but just name. If namespace is empty string then serializer will make sure that default empty namespace is declared (in XML 1.0 xmlns='') or throw IllegalStateException if default namespace is already bound to non-empty string.

Specified by:

startTag in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

text

public XmlSerializer text(char[] buf,
                          int start,
                          int len)
                   throws IOException,
                          IllegalArgumentException,
                          IllegalStateException

Description copied from interface: XmlSerializer

Writes text, where special XML chars are escaped automatically

Specified by:

text in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException

text

public XmlSerializer text(String text)
                   throws IOException,
                          IllegalArgumentException,
                          IllegalStateException

Description copied from interface: XmlSerializer

Writes text, where special XML chars are escaped automatically

Specified by:

text in interface XmlSerializer

Throws:

IOException

IllegalArgumentException

IllegalStateException