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java.beans
Class XMLDecoder

java.lang.Object
 extended by java.beans.XMLDecoder

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public class XMLDecoder
extends Object

The XMLDecoder class is used to read XML documents created using the XMLEncoder and is used just like the ObjectInputStream. For example, one can use the following fragment to read the first object defined in an XML document written by the XMLEncoder class:

 XMLDecoder d = new XMLDecoder(
 new BufferedInputStream(
 new FileInputStream("Test.xml")));
 Object result = d.readObject();
 d.close();
 

For more information you might also want to check out Long Term Persistence of JavaBeans Components: XML Schema, an article in The Swing Connection.

Since:

1.4

See Also:

XMLEncoder, ObjectInputStream

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Constructor Summary
XMLDecoder(InputStream in) Creates a new input stream for reading archives created by the XMLEncoder class.
XMLDecoder(InputStream in, Object owner) Creates a new input stream for reading archives created by the XMLEncoder class.
XMLDecoder(InputStream in, Object owner, ExceptionListener exceptionListener) Creates a new input stream for reading archives created by the XMLEncoder class.
XMLDecoder(InputStream in, Object owner, ExceptionListener exceptionListener, ClassLoader cl) Creates a new input stream for reading archives created by the XMLEncoder class.

Method Summary
void	close() This method closes the input stream associated with this stream.
ExceptionListener	getExceptionListener() Gets the exception handler for this stream.
Object	getOwner() Gets the owner of this decoder.
Object	readObject() Reads the next object from the underlying input stream.
void	setExceptionListener(ExceptionListener exceptionListener) Sets the exception handler for this stream to exceptionListener.
void	setOwner(Object owner) Sets the owner of this decoder to owner.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XMLDecoder

public XMLDecoder(InputStream in)

Creates a new input stream for reading archives created by the XMLEncoder class.

Parameters:

in - The underlying stream.

See Also:

XMLEncoder.XMLEncoder(java.io.OutputStream)

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XMLDecoder

public XMLDecoder(InputStream in,
 Object owner)

Creates a new input stream for reading archives created by the XMLEncoder class.

Parameters:

in - The underlying stream.

owner - The owner of this stream.

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XMLDecoder

public XMLDecoder(InputStream in,
 Object owner,
 ExceptionListener exceptionListener)

Creates a new input stream for reading archives created by the XMLEncoder class.

Parameters:

in - the underlying stream.

owner - the owner of this stream.

exceptionListener - the exception handler for the stream; if null the default exception listener will be used.

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XMLDecoder

public XMLDecoder(InputStream in,
 Object owner,
 ExceptionListener exceptionListener,
 ClassLoader cl)

Creates a new input stream for reading archives created by the XMLEncoder class.

Parameters:

in - the underlying stream. null may be passed without error, though the resulting XMLDecoder will be useless

owner - the owner of this stream. null is a legal value

exceptionListener - the exception handler for the stream, or null to use the default

cl - the class loader used for instantiating objects. null indicates that the default class loader should be used

Since:

1.5

Method Detail

close

public void close()

This method closes the input stream associated with this stream.

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setExceptionListener

public void setExceptionListener(ExceptionListener exceptionListener)

Sets the exception handler for this stream to exceptionListener. The exception handler is notified when this stream catches recoverable exceptions.

Parameters:

exceptionListener - The exception handler for this stream; if null the default exception listener will be used.

See Also:

getExceptionListener()

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getExceptionListener

public ExceptionListener getExceptionListener()

Gets the exception handler for this stream.

Returns:

The exception handler for this stream. Will return the default exception listener if this has not explicitly been set.

See Also:

setExceptionListener(java.beans.ExceptionListener)

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readObject

public Object readObject()

Reads the next object from the underlying input stream.

Returns:

the next object read

Throws:

ArrayIndexOutOfBoundsException - if the stream contains no objects (or no more objects)

See Also:

XMLEncoder.writeObject(java.lang.Object)

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setOwner

public void setOwner(Object owner)

Sets the owner of this decoder to owner.

Parameters:

owner - The owner of this decoder.

See Also:

getOwner()

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getOwner

public Object getOwner()

Gets the owner of this decoder.

Returns:

The owner of this decoder.

See Also:

setOwner(java.lang.Object)

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