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Runtime

org.eclipse.gmf.runtime.diagram.ui.resources.editor.ide.document
Class StorageDocumentProvider

java.lang.Object
  extended by 

org.eclipse.gmf.runtime.diagram.ui.resources.editor.document.AbstractDocumentProvider
      extended by 
org.eclipse.gmf.runtime.diagram.ui.resources.editor.ide.document.StorageDocumentProvider
All Implemented Interfaces:
IDocumentProvider
Direct Known Subclasses:
FileDocumentProvider, StorageDiagramDocumentProvider

public abstract class StorageDocumentProvider
extends AbstractDocumentProvider

Shared document provider specialized for IStorages.


Nested Class Summary
protected  class StorageDocumentProvider.StorageInfo
          Bundle of all required information to allow IStorage as underlying document resources.
 
Nested classes/interfaces inherited from class org.eclipse.gmf.runtime.diagram.ui.resources.editor.document. AbstractDocumentProvider
AbstractDocumentProvider.DocumentProviderOperation, AbstractDocumentProvider.ElementInfo
 
Field Summary
 
Fields inherited from class org.eclipse.gmf.runtime.diagram.ui.resources.editor.document. AbstractDocumentProvider
PR10806_UC5_ENABLED, PR14469_ENABLED, STATUS_ERROR, STATUS_OK
 
Constructor Summary
StorageDocumentProvider ()
          Creates a new document provider.
 
Method Summary
protected   IDocument createDocument (java.lang.Object element)
          Creates the document for the given element.
protected   AbstractDocumentProvider.ElementInfo createElementInfo (java.lang.Object element)
          Creates a new element info object for the given element.
protected abstract   IDocument createEmptyDocument ()
          Factory method for creating empty documents.
  AbstractDocumentProvider.ElementInfo createNewElementInfo ( IDocument document)
          Create a new ElementInfo
protected  void doSaveDocument ( IProgressMonitor monitor, java.lang.Object element, IDocument document, boolean overwrite)
          Performs the actual work of saving the given document provided for the given element.
protected  void doUpdateStateCache (java.lang.Object element)
          Hook method for updating the state of the given element.
protected   IRunnableContext getOperationRunner ( IProgressMonitor monitor)
          Returns the runnable context for this document provider.
protected  void handleCoreException ( CoreException exception, java.lang.String message)
          Defines the standard procedure to handle CoreExceptions.
 boolean isModifiable (java.lang.Object element)
          Returns whether the document provider thinks that the given element can persistently be modified.
 boolean isReadOnly (java.lang.Object element)
          Returns whether the document provider thinks that the given element is read-only.
protected  boolean setDocumentContent ( IDocument document, IEditorInput editorInput)
          Initializes the given document from the given editor input using the given character encoding.
protected abstract  void setDocumentContentFromStorage ( IDocument document, IStorage storage)
          Initializes the given document with the given stream using the given encoding.
protected  void setupDocument (java.lang.Object element, IDocument document)
          Sets up the given document as it would be provided for the given element.
protected  void updateCache ( IStorageEditorInput input)
          Updates the internal cache for the given input.
 
Methods inherited from class org.eclipse.gmf.runtime.diagram.ui.resources.editor.document. AbstractDocumentProvider
aboutToChange, addElementStateListener, addUnchangedElementListeners, canSaveDocument, changed, connect, connected, disconnect, disconnected, disposeElementInfo, doResetDocument, doSynchronize, doValidateState, executeOperation, fireElementContentAboutToBeReplaced, fireElementContentReplaced, fireElementDeleted, fireElementDirtyStateChanged, fireElementMoved, fireElementStateChangeFailed, fireElementStateChanging, fireElementStateValidationChanged, getConnectedElements, getDocument, getElementInfo, getModificationStamp, getProgressMonitor, getResetOperation, getResetRule, getSaveOperation, getSaveRule, getStatus, getSynchronizationStamp, getSynchronizeRule, getValidateStateRule, invalidatesState, isDeleted, isStateValidated, isSynchronized, mustSaveDocument, removeElementStateListener, removeUnchangedElementListeners, resetDocument, saveDocument, setCanSaveDocument, setProgressMonitor, synchronize, updateStateCache, validateState
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StorageDocumentProvider

public StorageDocumentProvider()
Creates a new document provider.

Method Detail

createDocument

protected 
IDocument createDocument(java.lang.Object element)
                            throws 
CoreException
Description copied from class: AbstractDocumentProvider
Creates the document for the given element.

Subclasses must implement this method.

Specified by:
createDocument in class AbstractDocumentProvider
Parameters:
element - the element
Returns:
the document
Throws:
CoreException - if the document could not be created
See Also:
AbstractDocumentProvider.createDocument(Object)

setupDocument

protected void setupDocument(java.lang.Object element,
                             
IDocument document)
Sets up the given document as it would be provided for the given element. The content of the document is not changed. This default implementation is empty. Subclasses may reimplement.

Parameters:
element - the blue-print element
document - the document to set up

createEmptyDocument

protected abstract 
IDocument createEmptyDocument()
Factory method for creating empty documents.

Specified by:
createEmptyDocument in class AbstractDocumentProvider
Returns:
the newly created document

createElementInfo

protected 
AbstractDocumentProvider.ElementInfo createElementInfo(java.lang.Object element)
                                                          throws 
CoreException
Description copied from class: AbstractDocumentProvider
Creates a new element info object for the given element.

This method is called from connect when an element info needs to be created. The AbstractDocumentProvider implementation of this method returns a new element info object whose document and annotation model are the values of createDocument(element) and createAnnotationModel(element), respectively. Subclasses may override.

Overrides:
createElementInfo in class AbstractDocumentProvider
Parameters:
element - the element
Returns:
a new element info object
Throws:
CoreException - if the document or annotation model could not be created

createNewElementInfo

public 
AbstractDocumentProvider.ElementInfo createNewElementInfo(
IDocument document)
Create a new ElementInfo

Parameters:
document -
Returns:
ElementInfo

setDocumentContent

protected boolean setDocumentContent(
IDocument document,
                                     
IEditorInput editorInput)
                              throws 
CoreException
Initializes the given document from the given editor input using the given character encoding.

Parameters:
document - the document to be initialized
editorInput - the input from which to derive the content of the document
encoding - the character encoding used to read the editor input
Returns:
true if the document content could be set, false otherwise
Throws:
CoreException - if the given editor input cannot be accessed

setDocumentContentFromStorage

protected abstract void setDocumentContentFromStorage(
IDocument document,
                                                      
IStorage storage)
                                               throws 
CoreException
Initializes the given document with the given stream using the given encoding.

Parameters:
document - the document to be initialized
contentStream - the stream which delivers the document content
encoding - the character encoding for reading the given stream
Throws:
CoreException - if the given stream can not be read

doSaveDocument

protected void doSaveDocument(
IProgressMonitor monitor,
                              java.lang.Object element,
                              
IDocument document,
                              boolean overwrite)
                       throws 
CoreException
Description copied from class: AbstractDocumentProvider
Performs the actual work of saving the given document provided for the given element.

Subclasses must implement this method.

Specified by:
doSaveDocument in class AbstractDocumentProvider
Parameters:
monitor - a progress monitor to report progress and request cancellation
element - the element
document - the document
overwrite - indicates whether an overwrite should happen if necessary
Throws:
CoreException - if document could not be stored to the given element

handleCoreException

protected void handleCoreException(
CoreException exception,
                                   java.lang.String message)
Defines the standard procedure to handle CoreExceptions. Exceptions are written to the plug-in log.

Parameters:
exception - the exception to be logged
message - the message to be logged

updateCache

protected void updateCache(
IStorageEditorInput input)
                    throws 
CoreException
Updates the internal cache for the given input.

Parameters:
input - the input whose cache will be updated
Throws:
CoreException - if the storage cannot be retrieved from the input

isReadOnly

public boolean isReadOnly(java.lang.Object element)
Description copied from interface: IDocumentProvider
Returns whether the document provider thinks that the given element is read-only. If this method returns true, saveDocument could fail. This method does not say anything about the document constructed from the given element. If the given element is not connected to this document provider, the return value is undefined. Document providers are allowed to use a cache to answer this question, i.e. there can be a difference between the "real" state of the element and the return value.

Specified by:
isReadOnly in interface IDocumentProvider
Overrides:
isReadOnly in class AbstractDocumentProvider
Parameters:
element - the element
Returns:
true if the given element is read-only, false otherwise

isModifiable

public boolean isModifiable(java.lang.Object element)
Description copied from interface: IDocumentProvider
Returns whether the document provider thinks that the given element can persistently be modified. This is orthogonal to isReadOnly as read-only elements may be modifiable and writable elements may not be modifiable. If the given element is not connected to this document provider, the result is undefined. Document providers are allowed to use a cache to answer this question, i.e. there can be a difference between the "real" state of the element and the return value.

Specified by:
isModifiable in interface IDocumentProvider
Overrides:
isModifiable in class AbstractDocumentProvider
Parameters:
element - the element
Returns:
true if the given element is modifiable, false otherwise

doUpdateStateCache

protected void doUpdateStateCache(java.lang.Object element)
                           throws 
CoreException
Description copied from class: AbstractDocumentProvider
Hook method for updating the state of the given element. Default implementation is empty.

Overrides:
doUpdateStateCache in class AbstractDocumentProvider
Parameters:
element - the element
Throws:
CoreException - in case state cache updating fails

getOperationRunner

protected 
IRunnableContext getOperationRunner(
IProgressMonitor monitor)
Description copied from class: AbstractDocumentProvider
Returns the runnable context for this document provider.

Specified by:
getOperationRunner in class AbstractDocumentProvider
Parameters:
monitor - a progress monitor to track the operation
Returns:
the runnable context for this document provider

Runtime

Guidelines for using Eclipse APIs.

Copyright (c) IBM Corp., Borland Software Corp., and others 2005,2006. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire