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Eclipse Platform
Release 3.0

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org.eclipse.compare
Class ResourceNode

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

All Implemented Interfaces:

IContentChangeNotifier, IEditableContent, IEncodedStreamContentAccessor, IModificationDate, IStreamContentAccessor, IStructureComparator, ITypedElement

public class ResourceNode

extends BufferedContent

implements IEncodedStreamContentAccessor, IStructureComparator, ITypedElement, IEditableContent, IModificationDate

A ResourceNode wrappers an IResources so that it can be used as input for the differencing engine (interfaces IStructureComparator and ITypedElement) and the ReplaceWithEditionDialog (interfaces ITypedElement and IModificationDate).

Clients may instantiate this class; it is not intended to be subclassed.

See Also:

EditionSelectionDialog

Field Summary

Fields inherited from interface org.eclipse.compare.ITypedElement

FOLDER_TYPE, TEXT_TYPE, UNKNOWN_TYPE

Constructor Summary

ResourceNode(IResource resource)
Creates a ResourceNode for the given resource.

Method Summary

protected IStructureComparator	createChild(IResource child) This hook method is called from getChildren once for every member of a container resource.
protected InputStream	createStream() Returns an open stream if the corresponding resource implements the IStorage interface.
boolean	equals(Object other) Returns true if the other object is of type ITypedElement and their names are identical.
String	getCharset() Returns the name of a charset encoding to be used when decoding this stream accessor's contents into characters.
Object[]	getChildren() Returns an iterator for all children of this object or null if there are no children.
InputStream	getContents() Returns an open InputStream for this object which can be used to retrieve the object's content.
Image	getImage() Returns an image for this object.
long	getModificationDate() Returns the modification time of this object.
String	getName() Returns the name of this object.
IResource	getResource() Returns the corresponding resource for this object.
String	getType() Returns the type of this object.
int	hashCode() Returns the hash code of the name.
boolean	isEditable() Returns true if this object can be modified.
ITypedElement	replace(ITypedElement child, ITypedElement other) This method is called on a parent to add or remove a child, or to copy the contents of a child.

Methods inherited from class org.eclipse.compare.BufferedContent

addContentChangeListener, discardBuffer, fireContentChanged, getContent, removeContentChangeListener, setContent

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.compare.IEditableContent

setContent

Constructor Detail

ResourceNode

public ResourceNode(IResource resource)

Creates a ResourceNode for the given resource.

Parameters:

resource - the resource

Method Detail

getResource

public IResource getResource()

Returns the corresponding resource for this object.

Returns:

the corresponding resource

getContents

public InputStream getContents()
                        throws 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

Overrides:

getContents in class BufferedContent

Throws:

CoreException

getModificationDate

public long getModificationDate()

Description copied from interface: IModificationDate

Returns the modification time of this object.

Note that this value should only be used to give the user a general idea of how old the object is.

Specified by:

getModificationDate in interface IModificationDate

Returns:

the time of last modification, in milliseconds since January 1, 1970, 00:00:00 GMT

getName

public String getName()

Description copied from interface: ITypedElement

Returns the name of this object. The name is used when displaying this object in the UI.

Specified by:

getName in interface ITypedElement

Returns:

the name of this object

getType

public String getType()

Description copied from interface: ITypedElement

Returns the type of this object. For objects with a file name this is typically the file extension. For folders its the constant FOLDER_TYPE. The type is used for determining a suitable viewer for this object.

Specified by:

getType in interface ITypedElement

Returns:

the type of this object

getImage

public Image getImage()

Description copied from interface: ITypedElement

Returns an image for this object. This image is used when displaying this object in the UI.

Specified by:

getImage in interface ITypedElement

Returns:

the image of this object or null if this type of input has no image

equals

public boolean equals(Object other)

Returns true if the other object is of type ITypedElement and their names are identical. The content is not considered.

Specified by:

equals in interface IStructureComparator

hashCode

public int hashCode()

Returns the hash code of the name.

getChildren

public Object[] getChildren()

Description copied from interface: IStructureComparator

Returns an iterator for all children of this object or null if there are no children.

Specified by:

getChildren in interface IStructureComparator

Returns:

an array with all children of this object, or an empty array if there are no children

createChild

protected IStructureComparator createChild(IResource child)

This hook method is called from getChildren once for every member of a container resource. This implementation creates a new ResourceNode for the given child resource. Clients may override this method to create a different type of IStructureComparator or to filter children by returning null.

Parameters:

child - the child resource for which a IStructureComparator must be returned

Returns:

a ResourceNode for the given child or null

createStream

protected InputStream createStream()
                            throws CoreException

Returns an open stream if the corresponding resource implements the IStorage interface. Otherwise the value null is returned.

Specified by:

createStream in class BufferedContent

Returns:

a buffered input stream containing the contents of this storage

Throws:

CoreException - if the contents of this storage could not be accessed

isEditable

public boolean isEditable()

Description copied from interface: IEditableContent

Returns true if this object can be modified. If it returns false the other methods of this API must not be called.

Specified by:

isEditable in interface IEditableContent

Returns:

true if this object can be modified

replace

public ITypedElement replace(ITypedElement child,
                             ITypedElement other)

Description copied from interface: IEditableContent

This method is called on a parent to add or remove a child, or to copy the contents of a child. What to do is encoded in the two arguments as follows:

add:	child == null	other != null
remove:	child != null	other == null
copy:	child != null	other != null

Specified by:

replace in interface IEditableContent

getCharset

public String getCharset()

Description copied from interface: IEncodedStreamContentAccessor

Returns the name of a charset encoding to be used when decoding this stream accessor's contents into characters. Returns null if a proper encoding cannot be determined.

Note: this method does not check whether the result is a supported charset name. Callers should be prepared to handle UnsupportedEncodingException where this charset is used.

Specified by:

getCharset in interface IEncodedStreamContentAccessor

Returns:

the name of a charset, or null

See Also:

IStreamContentAccessor.getContents()