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org.eclipse.compare
Class BufferedContent  

java.lang.Object
  org.eclipse.compare.BufferedContent

All Implemented Interfaces:

IContentChangeNotifier, IStreamContentAccessor

Direct Known Subclasses:

ResourceNode

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public abstract class BufferedContent

extends java.lang.Object

implements IContentChangeNotifier, IStreamContentAccessor

Abstract implementation for a buffered IStreamContentAccessor.

Subclasses must implement the createStream method to connect the buffered content with a streamable source (e.g., a file).

As long as the contents of BufferedContent is only retrieved as an input stream (by means of getContents) and the BufferedContent is not modified (with setContent) no buffering takes place. Buffering starts when either method getContent or setContent is called.

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Field Summary
(package private)  byte[]	fContent
private  org.eclipse.jface.util.ListenerList	fListenerList

 

Constructor Summary
protected	BufferedContent()           Creates a buffered stream content accessor.

 

Method Summary
void	addContentChangeListener(IContentChangeListener listener)           Adds a content change listener to this notifier.
protected abstract  java.io.InputStream	createStream()           Creates and returns a stream for reading the contents.
void	discardBuffer()           Discards the buffered content.
protected  void	fireContentChanged()           Notifies all registered IContentChangeListeners of a content change.
byte[]	getContent()           Returns the contents as an array of bytes.
java.io.InputStream	getContents()           Returns an open InputStream for this object which can be used to retrieve the object's content.
void	removeContentChangeListener(IContentChangeListener listener)           Removes the given content changed listener from this notifier.
void	setContent(byte[] contents)           Sets the contents.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

fContent

byte[] fContent

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fListenerList

private org.eclipse.jface.util.ListenerList fListenerList

Constructor Detail

BufferedContent

protected BufferedContent()

Creates a buffered stream content accessor.

Method Detail

getContents

public java.io.InputStream getContents()
                                throws org.eclipse.core.runtime.CoreException

Description copied from interface: IStreamContentAccessor

Returns an open InputStream for this object which can be used to retrieve the object's content. The client is responsible for closing the stream when finished. Returns null if this object has no streamable contents.

Specified by:

getContents in interface IStreamContentAccessor

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createStream

protected abstract java.io.InputStream createStream()
                                             throws org.eclipse.core.runtime.CoreException

Creates and returns a stream for reading the contents.

Subclasses must implement this method.

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setContent

public void setContent(byte[] contents)

Sets the contents. Registered content change listeners are notified.

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getContent

public byte[] getContent()

Returns the contents as an array of bytes.

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discardBuffer

public void discardBuffer()

Discards the buffered content.

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addContentChangeListener

public void addContentChangeListener(IContentChangeListener listener)

Description copied from interface: IContentChangeNotifier

Adds a content change listener to this notifier. Has no effect if an identical listener is already registered.

Specified by:

addContentChangeListener in interface IContentChangeNotifier

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removeContentChangeListener

public void removeContentChangeListener(IContentChangeListener listener)

Description copied from interface: IContentChangeNotifier

Removes the given content changed listener from this notifier. Has no effect if the listener is not registered.

Specified by:

removeContentChangeListener in interface IContentChangeNotifier

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fireContentChanged

protected void fireContentChanged()

Notifies all registered IContentChangeListeners of a content change.

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