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## org.eclipse.ui.editors.text
Class StorageDocumentProvider

    java.lang.Object
      org.eclipse.ui.texteditor.AbstractDocumentProvider
          org.eclipse.ui.editors.text.StorageDocumentProvider

All Implemented Interfaces:
  IDocumentProvider, IDocumentProviderExtension, IDocumentProviderExtension2, IDocumentProviderExtension3, IStorageDocumentProvider

Direct Known Subclasses:
  FileDocumentProvider

public class StorageDocumentProvider
extends AbstractDocumentProvider
implements IStorageDocumentProvider

Shared document provider specialized for `IStorage`s.

Nested Class Summary
`protected class` | `StorageDocumentProvider.StorageInfo` Bundle of all required information to allow `IStorage` as underlying document resources.

Nested classes inherited from class org.eclipse.ui.texteditor.AbstractDocumentProvider
`AbstractDocumentProvider.DocumentProviderOperation, AbstractDocumentProvider.ElementInfo`

Field Summary
`protected static int` | `DEFAULT_FILE_SIZE` Default file size.

Fields inherited from class org.eclipse.ui.texteditor.AbstractDocumentProvider
`PR10806_UC5_ENABLED, PR14469_ENABLED, STATUS_ERROR, STATUS_OK`

Constructor Summary
`StorageDocumentProvider()` Creates a new document provider.

Method Summary
`protected IAnnotationModel` | `createAnnotationModel(Object element)` Creates an annotation model for the given element.
`protected IDocument` | `createDocument(Object element)` Creates the document for the given element.
`protected AbstractDocumentProvider.ElementInfo` | `createElementInfo(Object element)` Creates a new element info object for the given element.
`protected IDocument` | `createEmptyDocument()` Factory method for creating empty documents.
`protected void` | `doSaveDocument(IProgressMonitor monitor, Object element, IDocument document, boolean overwrite)` Performs the actual work of saving the given document provided for the given element.
`protected void` | `doUpdateStateCache(Object element)` Hook method for updating the state of the given element.
`String` | `getDefaultEncoding()` Returns the default character encoding used by this provider.
`String` | `getEncoding(Object element)` Returns the character encoding for the given element, or `null` if the element is not managed by this provider.
`protected IRunnableContext` | `getOperationRunner(IProgressMonitor monitor)` Returns the runnable context for this document provider.
`protected String` | `getPersistedEncoding(Object element)` Returns the persisted encoding for the given element.
`protected void` | `handleCoreException(CoreException exception, String message)` Defines the standard procedure to handle `CoreExceptions`.
`boolean` | `isModifiable(Object element)` Returns whether the document provider thinks that the given element can persistently be modified.
`boolean` | `isReadOnly(Object element)` Returns whether the document provider thinks that the given element is read-only.
`protected void` | `persistEncoding(Object element, String encoding)` Persists the given encoding for the given element.
`protected boolean` | `setDocumentContent(IDocument document, IEditorInput editorInput)` Deprecated. use the encoding based version instead
`protected boolean` | `setDocumentContent(IDocument document, IEditorInput editorInput, String encoding)` Initializes the given document from the given editor input using the given character encoding.
`protected void` | `setDocumentContent(IDocument document, InputStream contentStream)` Deprecated. use encoding based version instead
`protected void` | `setDocumentContent(IDocument document, InputStream contentStream, String encoding)` Initializes the given document with the given stream using the given encoding.
`void` | `setEncoding(Object element, String encoding)` Sets the encoding for the given element.
`protected void` | `setupDocument(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.ui.texteditor.AbstractDocumentProvider
`aboutToChange, addElementStateListener, addUnchangedElementListeners, canSaveDocument, changed, connect, connected, disconnect, disconnected, disposeElementInfo, doResetDocument, doSynchronize, doValidateState, executeOperation, fireElementContentAboutToBeReplaced, fireElementContentReplaced, fireElementDeleted, fireElementDirtyStateChanged, fireElementMoved, fireElementStateChangeFailed, fireElementStateChanging, fireElementStateValidationChanged, getAnnotationModel, getConnectedElements, getDocument, getElementInfo, getModificationStamp, getProgressMonitor, getResetRule, 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`

Field Detail

### DEFAULT_FILE_SIZE

    protected static final int DEFAULT_FILE_SIZE

  Default file size.

  Since:
    2.1
  See Also:
    Constant Field Values

Constructor Detail

### StorageDocumentProvider

    public StorageDocumentProvider()

  Creates a new document provider.

Since:
  2.0

Method Detail

### setDocumentContent

    protected void setDocumentContent(IDocument document,
                                      InputStream contentStream)
                               throws CoreException

  Deprecated. use encoding based version instead

  Initializes the given document with the given stream.

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

### setDocumentContent

    protected void setDocumentContent(IDocument document,
                                      InputStream contentStream,
                                      String encoding)
                               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
  Since:
    2.0

### setDocumentContent

    protected boolean setDocumentContent(IDocument document,
                                         IEditorInput editorInput)
                                  throws CoreException

  Deprecated. use the encoding based version instead

  Initializes the given document from the given editor input using the default character encoding.

  Parameters:
    `document` - the document to be initialized
    `editorInput` - the input from which to derive the content of the document
  Returns:
    `true` if the document content could be set, `false` otherwise
  Throws:
    `CoreException` - if the given editor input cannot be accessed
  Since:
    2.0

### setDocumentContent

    protected boolean setDocumentContent(IDocument document,
                                         IEditorInput editorInput,
                                         String encoding)
                                  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
  Since:
    2.0

### createAnnotationModel

    protected IAnnotationModel createAnnotationModel(Object element)
                                              throws CoreException

  Description copied from class: `AbstractDocumentProvider`
  Creates an annotation model for the given element.

  Subclasses must implement this method.

  Specified by:
    `createAnnotationModel` in class `AbstractDocumentProvider`
  Parameters:
    `element` - the element
  Returns:
    the annotation model
  Throws:
    `CoreException` - if the annotation model could not be created

### createEmptyDocument

    protected IDocument createEmptyDocument()

  Factory method for creating empty documents.

  Returns:
    the newly created document
  Since:
    2.1

### createDocument

    protected IDocument createDocument(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

### setupDocument

    protected void setupDocument(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
  Since:
    3.0

### createElementInfo

    protected AbstractDocumentProvider.ElementInfo createElementInfo(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

### doSaveDocument

    protected void doSaveDocument(IProgressMonitor monitor,
                                  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,
                                       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
  Since:
    2.0

### 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
  Since:
    2.0

### isReadOnly

    public boolean isReadOnly(Object element)

  Description copied from interface: `IDocumentProviderExtension`
  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 `IDocumentProviderExtension`
  Overrides:
    `isReadOnly` in class `AbstractDocumentProvider`

### isModifiable

    public boolean isModifiable(Object element)

  Description copied from interface: `IDocumentProviderExtension`
  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 `IDocumentProviderExtension`
  Overrides:
    `isModifiable` in class `AbstractDocumentProvider`

### doUpdateStateCache

    protected void doUpdateStateCache(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

### getDefaultEncoding

    public String getDefaultEncoding()

  Description copied from interface: `IStorageDocumentProvider`
  Returns the default character encoding used by this provider.

  Specified by:
    `getDefaultEncoding` in interface `IStorageDocumentProvider`
  Returns:
    the default character encoding used by this provider

### getEncoding

    public String getEncoding(Object element)

  Description copied from interface: `IStorageDocumentProvider`
  Returns the character encoding for the given element, or `null` if the element is not managed by this provider.

  Specified by:
    `getEncoding` in interface `IStorageDocumentProvider`
  Parameters:
    `element` - the element
  Returns:
    the encoding for the given element

### setEncoding

    public void setEncoding(Object element,
                            String encoding)

  Description copied from interface: `IStorageDocumentProvider`
  Sets the encoding for the given element. If `encoding` is `null` the workbench's character encoding should be used.

  Specified by:
    `setEncoding` in interface `IStorageDocumentProvider`
  Parameters:
    `element` - the element
    `encoding` - the encoding to be used

### getPersistedEncoding

    protected String getPersistedEncoding(Object element)

  Returns the persisted encoding for the given element.

  Parameters:
    `element` - the element for which to get the persisted encoding
  Returns:
    the persisted encoding
  Since:
    2.1

### persistEncoding

    protected void persistEncoding(Object element,
                                   String encoding)
                            throws CoreException

  Persists the given encoding for the given element.

  Parameters:
    `element` - the element for which to store the persisted encoding
    `encoding` - the encoding
  Throws:
    `CoreException` - if the operation fails
  Since:
    2.1

### 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

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