bundles/org.eclipse.wst.sse.core/src/org/eclipse/wst/sse/core/internal/provisional/IStructuredModel.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2001, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Jens Lukowski/Innoopract - initial renaming/restructuring
  *
  *******************************************************************************/
 package org.eclipse.wst.sse.core.internal.provisional;

 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.wst.sse.core.internal.encoding.EncodingRule;
 import org.eclipse.wst.sse.core.internal.ltk.modelhandler.IModelHandler;
 import org.eclipse.wst.sse.core.internal.model.FactoryRegistry;
 import org.eclipse.wst.sse.core.internal.provisional.exceptions.ResourceAlreadyExists;
 import org.eclipse.wst.sse.core.internal.provisional.exceptions.ResourceInUse;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
 import org.eclipse.wst.sse.core.internal.undo.IStructuredTextUndoManager;
 import org.eclipse.wst.sse.core.internal.util.URIResolver;


 /**
  * IStructuredModel's are mainly interesting by their extensions and
  * implementers. The main purposed of this abstraction it to provide a common
  * way to manage models that have an associated structured documnet.
  *
  * @plannedfor 1.0
  *
  * ISSUE: this interface needs ton of cleanup!
  */
 public interface IStructuredModel extends IAdaptable {


 	/**
 	 * This API allows clients to declare that they are about to make a
 	 * "large" change to the model. This change might be in terms of content
 	 * or it might be in terms of the model id or base location.
 	 *
 	 * Note that in the case of embedded calls, notification to listeners is
 	 * sent only once.
 	 *
 	 * Note that the client who is making these changes has the responsibility
 	 * to restore the model's state once finished with the changes. See
 	 * getMemento and restoreState.
 	 *
 	 * The method isModelStateChanging can be used by a client to determine if
 	 * the model is already in a change sequence.
 	 *
 	 * This method is a matched pair to changedModel, and must be called
 	 * before changedModel. A client should never call changedModel without
 	 * calling aboutToChangeModel first nor call aboutToChangeModel without
 	 * calling changedModel later from the same Thread.
 	 */
 	void aboutToChangeModel();

 	void addModelLifecycleListener(IModelLifecycleListener listener);

 	void addModelStateListener(IModelStateListener listener);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester, int cursorPosition, int selectionLength);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester, String label);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester, String label, int cursorPosition, int selectionLength);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester, String label, String description);

 	/**
 	 * Begin recording undo transactions.
 	 */
 	void beginRecording(Object requester, String label, String description, int cursorPosition, int selectionLength);

 	/**
 	 * This API allows a client controlled way of notifying all ModelEvent
 	 * listners that the model has been changed. This method is a matched pair
 	 * to aboutToChangeModel, and must be called after aboutToChangeModel ...
 	 * or some listeners could be left waiting indefinitely for the changed
 	 * event. So, its suggested that changedModel always be in a finally
 	 * clause. Likewise, a client should never call changedModel without
 	 * calling aboutToChangeModel first.
 	 *
 	 * In the case of embedded calls, the notification is just sent once.
 	 *
 	 */
 	void changedModel();

 	long computeModificationStamp(IResource resource);

 	/**
 	 * @deprecated
 	 */
 	IStructuredModel copy(String id) throws ResourceInUse, ResourceAlreadyExists;

 	/**
 	 * Disable undo management.
 	 */
 	void disableUndoManagement();

 	/**
 	 * Enable undo management.
 	 */
 	void enableUndoManagement();

 	/**
 	 * End recording undo transactions.
 	 */
 	void endRecording(Object requester);

 	/**
 	 * End recording undo transactions.
 	 */
 	void endRecording(Object requester, int cursorPosition, int selectionLength);

 	/**
 	 * This is a client-defined value for what that client (and/or loader)
 	 * considers the "base" of the structured model. Frequently the location
 	 * is either a workspace root-relative path of a workspace resource or an
 	 * absolute path in the local file system.
 	 */
 	String getBaseLocation();

 	/**
 	 * @return The associated content type identifier (String) for this model.
 	 */
 	String getContentTypeIdentifier();

 	/**
 	 *
 	 * @return The model's FactoryRegistry. A model is not valid without one.
 	 */
 	FactoryRegistry getFactoryRegistry();

 	/**
 	 * The id is the id that the model manager uses to identify this model
 	 */
 	String getId();

 	/**
 	 *
 	 */
 	IndexedRegion getIndexedRegion(int offset);

 	/**
 	 * ContentTypeDescription provides an object that describes what the
 	 * content of the file is, e.g. HTML, XML, etc. Compare with
 	 * getExternalFileTypeDescription. Though they both return objects of type
 	 * ContentTypeDescription, the external file type is intended to denote
 	 * JSP, regardless of what the content of that JSP file is. Even for a JSP
 	 * file, the ContentTypeDescription will be set according to that file's
 	 * "internal" contents.
 	 *
 	 * @return ContentTypeDescription
 	 */
 	IModelHandler getModelHandler();

 	IModelManager getModelManager();

 	/**
 	 * This function returns the reference count of underlying model.
 	 *
 	 * @param id
 	 *            Object The id of the model TODO: try to refine the design
 	 *            not to use this function
 	 */
 	int getReferenceCount();

 	/**
 	 * This function returns the reference count of underlying model.
 	 *
 	 * @param id
 	 *            Object The id of the model TODO: try to refine the design
 	 *            not to use this function
 	 */
 	int getReferenceCountForEdit();

 	/**
 	 * This function returns the reference count of underlying model.
 	 *
 	 * @param id
 	 *            Object The id of the model TODO: try to refine the design
 	 *            not to use this function
 	 */
 	int getReferenceCountForRead();

 	Object getReinitializeStateData();

 	/**
 	 * Get URI resolution helper
 	 */
 	URIResolver getResolver();

 	IStructuredDocument getStructuredDocument();

 	/**
 	 * modification date of underlying resource, when this model was open, or
 	 * last saved. (Note: for this version, the client must manage the
 	 * accuracy of this data)
 	 */
 	long getSynchronizationStamp();

 	/**
 	 * Get undo manager.
 	 */
 	IStructuredTextUndoManager getUndoManager();

 	/**
 	 *
 	 */
 	boolean isDirty();

 	/**
 	 * This method can be called to determine if the model is within a
 	 * "aboutToChange" and "changed" sequence.
 	 */
 	public boolean isModelStateChanging();

 	/**
 	 *
 	 */
 	boolean isNew();

 	boolean isReinitializationNeeded();

 	/**
 	 * This is a combination of if the model is dirty and if the model is
 	 * shared for write access. The last writer as the responsibility to be
 	 * sure the user is prompted to save.
 	 */
 	public boolean isSaveNeeded();

 	/**
 	 * This function returns true if either isSharedForRead or isSharedForEdit
 	 * is true.
 	 */
 	boolean isShared();

 	/**
 	 * This function returns true if there are other references to the
 	 * underlying model.
 	 */
 	boolean isSharedForEdit();

 	/**
 	 * This function returns true if there are other references to the
 	 * underlying model.
 	 */
 	boolean isSharedForRead();

 	/**
 	 * newInstance is similar to clone, except that the newInstance contains
 	 * no content. Its purpose is so clients can get a temporary, unmanaged,
 	 * model of the same "type" as the original. Note: the client may still
 	 * need to do some intialization of the model returned by newInstance,
 	 * depending on desired use. For example, the only factories in the
 	 * newInstance are those that would be normally be created for a model of
 	 * the given contentType. Others are not copied automatically, and if
 	 * desired, should be added by client.
 	 */
 	IStructuredModel newInstance() throws IOException;

 	/**
 	 * Performs a reinit procedure. For this model. Note for future: there may
 	 * be a day where the model returned from this method is a different
 	 * instance than the instance it was called on. This will occur when there
 	 * is full support for "save as" type functions, where the model could
 	 * theoretically change completely.
 	 */
 	IStructuredModel reinit() throws IOException;

 	/**
 	 * This function allows the model to free up any resources it might be
 	 * using. In particular, itself, as stored in the IModelManager.
 	 *
 	 */
 	void releaseFromEdit();

 	/**
 	 * This function allows the model to free up any resources it might be
 	 * using. In particular, itself, as stored in the IModelManager.
 	 *
 	 */
 	void releaseFromRead();

 	/**
 	 * This function replenishes the model with the resource without saving
 	 * any possible changes. It is used when one editor may be closing, and
 	 * specifially says not to save the model, but another "display" of the
 	 * model still needs to hang on to some model, so needs a fresh copy.
 	 *
 	 * Only valid for use with managed models.
 	 */
 	IStructuredModel reload(InputStream inputStream) throws IOException;

 	void removeModelLifecycleListener(IModelLifecycleListener listener);

 	void removeModelStateListener(IModelStateListener listener);

 	/**
 	 * A method that modififies the model's synchonization stamp to match the
 	 * resource. Turns out there's several ways of doing it, so this ensures a
 	 * common algorithm.
 	 */
 	void resetSynchronizationStamp(IResource resource);

 	void resourceDeleted();

 	void resourceMoved(IStructuredModel newModel);

 	void save() throws UnsupportedEncodingException, IOException, CoreException;

 	void save(EncodingRule encodingRule) throws UnsupportedEncodingException, IOException, CoreException;

 	void save(IFile iFile) throws UnsupportedEncodingException, IOException, CoreException;

 	void save(IFile iFile, EncodingRule encodingRule) throws UnsupportedEncodingException, IOException, CoreException;

 	void save(OutputStream outputStream) throws UnsupportedEncodingException, IOException, CoreException;

 	void setBaseLocation(String newBaseLocation);

 	public void setDirtyState(boolean dirtyState);

 	void setFactoryRegistry(FactoryRegistry registry);

 	/**
 	 * The id is the id that the model manager uses to identify this model
 	 */
 	void setId(String id) throws ResourceInUse;

 	void setModelHandler(IModelHandler modelHandler);

 	void setModelManager(IModelManager modelManager);

 	public void setNewState(boolean newState);

 	/**
 	 * Sets a "flag" that reinitialization is needed.
 	 */
 	void setReinitializeNeeded(boolean b);

 	/**
 	 * Holds any data that the reinit procedure might find useful in
 	 * reinitializing the model. This is handy, since the reinitialization may
 	 * not take place at once, and some "old" data may be needed to properly
 	 * undo previous settings. Note: the parameter was intentially made to be
 	 * of type 'Object' so different models can use in different ways.
 	 */
 	void setReinitializeStateData(Object object);

 	/**
 	 * Set the URI resolution helper
 	 */
 	void setResolver(URIResolver uriResolver);

 	void setStructuredDocument(IStructuredDocument structuredDocument);

 	/**
 	 * Set undo manager.
 	 */
 	void setUndoManager(IStructuredTextUndoManager undoManager);
 }
	/*******************************************************************************
	* Copyright (c) 2001, 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Jens Lukowski/Innoopract - initial renaming/restructuring
	*
	*******************************************************************************/
	package org.eclipse.wst.sse.core.internal.provisional;

	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.UnsupportedEncodingException;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.wst.sse.core.internal.encoding.EncodingRule;
	import org.eclipse.wst.sse.core.internal.ltk.modelhandler.IModelHandler;
	import org.eclipse.wst.sse.core.internal.model.FactoryRegistry;
	import org.eclipse.wst.sse.core.internal.provisional.exceptions.ResourceAlreadyExists;
	import org.eclipse.wst.sse.core.internal.provisional.exceptions.ResourceInUse;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
	import org.eclipse.wst.sse.core.internal.undo.IStructuredTextUndoManager;
	import org.eclipse.wst.sse.core.internal.util.URIResolver;


	/**
	* IStructuredModel's are mainly interesting by their extensions and
	* implementers. The main purposed of this abstraction it to provide a common
	* way to manage models that have an associated structured documnet.
	*
	* @plannedfor 1.0
	*
	* ISSUE: this interface needs ton of cleanup!
	*/
	public interface IStructuredModel extends IAdaptable {


	/**
	* This API allows clients to declare that they are about to make a
	* "large" change to the model. This change might be in terms of content
	* or it might be in terms of the model id or base location.
	*
	* Note that in the case of embedded calls, notification to listeners is
	* sent only once.
	*
	* Note that the client who is making these changes has the responsibility
	* to restore the model's state once finished with the changes. See
	* getMemento and restoreState.
	*
	* The method isModelStateChanging can be used by a client to determine if
	* the model is already in a change sequence.
	*
	* This method is a matched pair to changedModel, and must be called
	* before changedModel. A client should never call changedModel without
	* calling aboutToChangeModel first nor call aboutToChangeModel without
	* calling changedModel later from the same Thread.
	*/
	void aboutToChangeModel();

	void addModelLifecycleListener(IModelLifecycleListener listener);

	void addModelStateListener(IModelStateListener listener);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester, int cursorPosition, int selectionLength);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester, String label);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester, String label, int cursorPosition, int selectionLength);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester, String label, String description);

	/**
	* Begin recording undo transactions.
	*/
	void beginRecording(Object requester, String label, String description, int cursorPosition, int selectionLength);

	/**
	* This API allows a client controlled way of notifying all ModelEvent
	* listners that the model has been changed. This method is a matched pair
	* to aboutToChangeModel, and must be called after aboutToChangeModel ...
	* or some listeners could be left waiting indefinitely for the changed
	* event. So, its suggested that changedModel always be in a finally
	* clause. Likewise, a client should never call changedModel without
	* calling aboutToChangeModel first.
	*
	* In the case of embedded calls, the notification is just sent once.
	*
	*/
	void changedModel();

	long computeModificationStamp(IResource resource);

	/**
	* @deprecated
	*/
	IStructuredModel copy(String id) throws ResourceInUse, ResourceAlreadyExists;

	/**
	* Disable undo management.
	*/
	void disableUndoManagement();

	/**
	* Enable undo management.
	*/
	void enableUndoManagement();

	/**
	* End recording undo transactions.
	*/
	void endRecording(Object requester);

	/**
	* End recording undo transactions.
	*/
	void endRecording(Object requester, int cursorPosition, int selectionLength);

	/**
	* This is a client-defined value for what that client (and/or loader)
	* considers the "base" of the structured model. Frequently the location
	* is either a workspace root-relative path of a workspace resource or an
	* absolute path in the local file system.
	*/
	String getBaseLocation();

	/**
	* @return The associated content type identifier (String) for this model.
	*/
	String getContentTypeIdentifier();

	/**
	*
	* @return The model's FactoryRegistry. A model is not valid without one.
	*/
	FactoryRegistry getFactoryRegistry();

	/**
	* The id is the id that the model manager uses to identify this model
	*/
	String getId();

	/**
	*
	*/
	IndexedRegion getIndexedRegion(int offset);

	/**
	* ContentTypeDescription provides an object that describes what the
	* content of the file is, e.g. HTML, XML, etc. Compare with
	* getExternalFileTypeDescription. Though they both return objects of type
	* ContentTypeDescription, the external file type is intended to denote
	* JSP, regardless of what the content of that JSP file is. Even for a JSP
	* file, the ContentTypeDescription will be set according to that file's
	* "internal" contents.
	*
	* @return ContentTypeDescription
	*/
	IModelHandler getModelHandler();

	IModelManager getModelManager();

	/**
	* This function returns the reference count of underlying model.
	*
	* @param id
	* Object The id of the model TODO: try to refine the design
	* not to use this function
	*/
	int getReferenceCount();

	/**
	* This function returns the reference count of underlying model.
	*
	* @param id
	* Object The id of the model TODO: try to refine the design
	* not to use this function
	*/
	int getReferenceCountForEdit();

	/**
	* This function returns the reference count of underlying model.
	*
	* @param id
	* Object The id of the model TODO: try to refine the design
	* not to use this function
	*/
	int getReferenceCountForRead();

	Object getReinitializeStateData();

	/**
	* Get URI resolution helper
	*/
	URIResolver getResolver();

	IStructuredDocument getStructuredDocument();

	/**
	* modification date of underlying resource, when this model was open, or
	* last saved. (Note: for this version, the client must manage the
	* accuracy of this data)
	*/
	long getSynchronizationStamp();

	/**
	* Get undo manager.
	*/
	IStructuredTextUndoManager getUndoManager();

	/**
	*
	*/
	boolean isDirty();

	/**
	* This method can be called to determine if the model is within a
	* "aboutToChange" and "changed" sequence.
	*/
	public boolean isModelStateChanging();

	/**
	*
	*/
	boolean isNew();

	boolean isReinitializationNeeded();

	/**
	* This is a combination of if the model is dirty and if the model is
	* shared for write access. The last writer as the responsibility to be
	* sure the user is prompted to save.
	*/
	public boolean isSaveNeeded();

	/**
	* This function returns true if either isSharedForRead or isSharedForEdit
	* is true.
	*/
	boolean isShared();

	/**
	* This function returns true if there are other references to the
	* underlying model.
	*/
	boolean isSharedForEdit();

	/**
	* This function returns true if there are other references to the
	* underlying model.
	*/
	boolean isSharedForRead();

	/**
	* newInstance is similar to clone, except that the newInstance contains
	* no content. Its purpose is so clients can get a temporary, unmanaged,
	* model of the same "type" as the original. Note: the client may still
	* need to do some intialization of the model returned by newInstance,
	* depending on desired use. For example, the only factories in the
	* newInstance are those that would be normally be created for a model of
	* the given contentType. Others are not copied automatically, and if
	* desired, should be added by client.
	*/
	IStructuredModel newInstance() throws IOException;

	/**
	* Performs a reinit procedure. For this model. Note for future: there may
	* be a day where the model returned from this method is a different
	* instance than the instance it was called on. This will occur when there
	* is full support for "save as" type functions, where the model could
	* theoretically change completely.
	*/
	IStructuredModel reinit() throws IOException;

	/**
	* This function allows the model to free up any resources it might be
	* using. In particular, itself, as stored in the IModelManager.
	*
	*/
	void releaseFromEdit();

	/**
	* This function allows the model to free up any resources it might be
	* using. In particular, itself, as stored in the IModelManager.
	*
	*/
	void releaseFromRead();

	/**
	* This function replenishes the model with the resource without saving
	* any possible changes. It is used when one editor may be closing, and
	* specifially says not to save the model, but another "display" of the
	* model still needs to hang on to some model, so needs a fresh copy.
	*
	* Only valid for use with managed models.
	*/
	IStructuredModel reload(InputStream inputStream) throws IOException;

	void removeModelLifecycleListener(IModelLifecycleListener listener);

	void removeModelStateListener(IModelStateListener listener);

	/**
	* A method that modififies the model's synchonization stamp to match the
	* resource. Turns out there's several ways of doing it, so this ensures a
	* common algorithm.
	*/
	void resetSynchronizationStamp(IResource resource);

	void resourceDeleted();

	void resourceMoved(IStructuredModel newModel);

	void save() throws UnsupportedEncodingException, IOException, CoreException;

	void save(EncodingRule encodingRule) throws UnsupportedEncodingException, IOException, CoreException;

	void save(IFile iFile) throws UnsupportedEncodingException, IOException, CoreException;

	void save(IFile iFile, EncodingRule encodingRule) throws UnsupportedEncodingException, IOException, CoreException;

	void save(OutputStream outputStream) throws UnsupportedEncodingException, IOException, CoreException;

	void setBaseLocation(String newBaseLocation);

	public void setDirtyState(boolean dirtyState);

	void setFactoryRegistry(FactoryRegistry registry);

	/**
	* The id is the id that the model manager uses to identify this model
	*/
	void setId(String id) throws ResourceInUse;

	void setModelHandler(IModelHandler modelHandler);

	void setModelManager(IModelManager modelManager);

	public void setNewState(boolean newState);

	/**
	* Sets a "flag" that reinitialization is needed.
	*/
	void setReinitializeNeeded(boolean b);

	/**
	* Holds any data that the reinit procedure might find useful in
	* reinitializing the model. This is handy, since the reinitialization may
	* not take place at once, and some "old" data may be needed to properly
	* undo previous settings. Note: the parameter was intentially made to be
	* of type 'Object' so different models can use in different ways.
	*/
	void setReinitializeStateData(Object object);

	/**
	* Set the URI resolution helper
	*/
	void setResolver(URIResolver uriResolver);

	void setStructuredDocument(IStructuredDocument structuredDocument);

	/**
	* Set undo manager.
	*/
	void setUndoManager(IStructuredTextUndoManager undoManager);
	}