/*******************************************************************************
* Copyright (c) 2000, 2011 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
* James Blackburn (Broadcom Corp.) - ongoing development
*******************************************************************************/
package org.eclipse.core.resources;
import java.io.InputStream;
import java.io.Reader;
import java.net.URI;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.core.runtime.content.IContentTypeManager;
/**
* Files are leaf resources which contain data.
* The contents of a file resource is stored as a file in the local
* file system.
* <p>
* Files, like folders, may exist in the workspace but
* not be local; non-local file resources serve as place-holders for
* files whose content and properties have not yet been fetched from
* a repository.
* </p>
* <p>
* Files implement the <code>IAdaptable</code> interface;
* extensions are managed by the platform's adapter manager.
* </p>
*
* @see Platform#getAdapterManager()
* @noimplement This interface is not intended to be implemented by clients.
* @noextend This interface is not intended to be extended by clients.
*/
public interface IFile extends IResource, IEncodedStorage, IAdaptable {
/**
* Character encoding constant (value 0) which identifies
* files that have an unknown character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_UNKNOWN = 0;
/**
* Character encoding constant (value 1) which identifies
* files that are encoded with the US-ASCII character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_US_ASCII = 1;
/**
* Character encoding constant (value 2) which identifies
* files that are encoded with the ISO-8859-1 character encoding scheme,
* also known as ISO-LATIN-1.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_ISO_8859_1 = 2;
/**
* Character encoding constant (value 3) which identifies
* files that are encoded with the UTF-8 character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_UTF_8 = 3;
/**
* Character encoding constant (value 4) which identifies
* files that are encoded with the UTF-16BE character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_UTF_16BE = 4;
/**
* Character encoding constant (value 5) which identifies
* files that are encoded with the UTF-16LE character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_UTF_16LE = 5;
/**
* Character encoding constant (value 6) which identifies
* files that are encoded with the UTF-16 character encoding scheme.
*
* @see IFile#getEncoding()
* @deprecated see getEncoding for details
*/
public int ENCODING_UTF_16 = 6;
/**
* Appends the entire contents of the given stream to this file.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* appendContents(source, (keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's content have been changed.
* </p>
* <p>
* This method is long-running; progress and cancelation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the new contents of the file
* @param force a flag controlling how to deal with resources that
* are not in sync with the local file system
* @param keepHistory a flag indicating whether or not to store
* the current contents in the local history
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>force </code> is <code>false</code>.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see #appendContents(java.io.InputStream,int,IProgressMonitor)
*/
public void appendContents(InputStream source, boolean force, boolean keepHistory, IProgressMonitor monitor) throws CoreException;
/**
* Appends the entire contents of the given stream to this file.
* The stream, which must not be <code>null</code>, will get closed
* whether this method succeeds or fails.
* <p>
* The <code>FORCE</code> update flag controls how this method deals with
* cases where the workspace is not completely in sync with the local file
* system. If <code>FORCE</code> is not specified, the method will only attempt
* to overwrite a corresponding file in the local file system provided
* it is in sync with the workspace. This option ensures there is no
* unintended data loss; it is the recommended setting.
* However, if <code>FORCE</code> is specified, an attempt will be made
* to write a corresponding file in the local file system, overwriting any
* existing one if need be. In either case, if this method succeeds, the
* resource will be marked as being local (even if it wasn't before).
* </p>
* <p>
* If this file is non-local then this method will always fail. The only exception
* is when <code>FORCE</code> is specified and the file exists in the local
* file system. In this case the file is made local and the given contents are appended.
* </p>
* <p>
* The <code>KEEP_HISTORY</code> update flag controls whether or not a copy of
* current contents of this file should be captured in the workspace's local
* history (properties are not recorded in the local history). The local history
* mechanism serves as a safety net to help the user recover from mistakes that
* might otherwise result in data loss. Specifying <code>KEEP_HISTORY</code>
* is recommended except in circumstances where past states of the files are of
* no conceivable interest to the user. Note that local history is maintained
* with each individual project, and gets discarded when a project is deleted
* from the workspace. This flag is ignored if the file was not previously local.
* </p>
* <p>
* Update flags other than <code>FORCE</code> and <code>KEEP_HISTORY</code>
* are ignored.
* </p>
* <p>
* Prior to modifying the contents of this file, the file modification validator (if provided
* by the VCM plug-in), will be given a chance to perform any last minute preparations. Validation
* is performed by calling <code>IFileModificationValidator.validateSave</code> on this file.
* If the validation fails, then this operation will fail.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's content have been changed.
* </p>
* <p>
* This method is long-running; progress and cancelation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the new contents of the file
* @param updateFlags bit-wise or of update flag constants
* (<code>FORCE</code> and <code>KEEP_HISTORY</code>)
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>FORCE</code> is not specified.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResourceRuleFactory#modifyRule(IResource)
* @since 2.0
*/
public void appendContents(InputStream source, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Creates a new file resource as a member of this handle's parent resource.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* create(source, (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that the file has been added to its parent.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the initial contents of the file,
* or <code>null</code> if the file should be marked as not local
* @param force a flag controlling how to deal with resources that
* are not in sync with the local file system
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource already exists in the workspace.</li>
* <li> The parent of this resource does not exist.</li>
* <li> The parent of this resource is a virtual folder.</li>
* <li> The project of this resource is not accessible.</li>
* <li> The parent contains a resource of a different type
* at the same path as this resource.</li>
* <li> The name of this resource is not valid (according to
* <code>IWorkspace.validateName</code>).</li>
* <li> The corresponding location in the local file system is occupied
* by a directory.</li>
* <li> The corresponding location in the local file system is occupied
* by a file and <code>force </code> is <code>false</code>.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
*/
public void create(InputStream source, boolean force, IProgressMonitor monitor) throws CoreException;
/**
* Creates a new file resource as a member of this handle's parent resource.
* The resource's contents are supplied by the data in the given stream.
* This method closes the stream whether it succeeds or fails.
* If the stream is <code>null</code> then a file is not created in the local
* file system and the created file resource is marked as being non-local.
* <p>
* The {@link IResource#FORCE} update flag controls how this method deals with
* cases where the workspace is not completely in sync with the local file
* system. If {@link IResource#FORCE} is not specified, the method will only attempt
* to write a file in the local file system if it does not already exist.
* This option ensures there is no unintended data loss; it is the recommended
* setting. However, if {@link IResource#FORCE} is specified, this method will
* attempt to write a corresponding file in the local file system,
* overwriting any existing one if need be.
* </p>
* <p>
* The {@link IResource#DERIVED} update flag indicates that this resource
* should immediately be set as a derived resource. Specifying this flag
* is equivalent to atomically calling {@link IResource#setDerived(boolean)}
* with a value of <code>true</code> immediately after creating the resource.
* </p>
* <p>
* The {@link IResource#TEAM_PRIVATE} update flag indicates that this resource
* should immediately be set as a team private resource. Specifying this flag
* is equivalent to atomically calling {@link IResource#setTeamPrivateMember(boolean)}
* with a value of <code>true</code> immediately after creating the resource.
* </p>
* <p>
* The {@link IResource#HIDDEN} update flag indicates that this resource
* should immediately be set as a hidden resource. Specifying this flag
* is equivalent to atomically calling {@link IResource#setHidden(boolean)}
* with a value of <code>true</code> immediately after creating the resource.
* </p>
* <p>
* Update flags other than those listed above are ignored.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that the file has been added to its parent.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the initial contents of the file,
* or <code>null</code> if the file should be marked as not local
* @param updateFlags bit-wise or of update flag constants
* ({@link IResource#FORCE}, {@link IResource#DERIVED}, and {@link IResource#TEAM_PRIVATE})
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource already exists in the workspace.</li>
* <li> The parent of this resource does not exist.</li>
* <li> The parent of this resource is a virtual folder.</li>
* <li> The project of this resource is not accessible.</li>
* <li> The parent contains a resource of a different type
* at the same path as this resource.</li>
* <li> The name of this resource is not valid (according to
* <code>IWorkspace.validateName</code>).</li>
* <li> The corresponding location in the local file system is occupied
* by a directory.</li>
* <li> The corresponding location in the local file system is occupied
* by a file and <code>FORCE</code> is not specified.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResourceRuleFactory#createRule(IResource)
* @since 2.0
*/
public void create(InputStream source, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Creates a new file resource as a member of this handle's parent resource.
* The file's contents will be located in the file specified by the given
* file system path. The given path must be either an absolute file system
* path, or a relative path whose first segment is the name of a workspace path
* variable.
* <p>
* The {@link IResource#ALLOW_MISSING_LOCAL} update flag controls how this
* method deals with cases where the local file system file to be linked does
* not exist, or is relative to a workspace path variable that is not defined.
* If {@link IResource#ALLOW_MISSING_LOCAL} is specified, the operation will succeed
* even if the local file is missing, or the path is relative to an undefined
* variable. If {@link IResource#ALLOW_MISSING_LOCAL} is not specified, the operation
* will fail in the case where the local file system file does not exist or the
* path is relative to an undefined variable.
* </p>
* <p>
* The {@link IResource#REPLACE} update flag controls how this
* method deals with cases where a resource of the same name as the
* prospective link already exists. If {@link IResource#REPLACE}
* is specified, then the existing linked resource's location is replaced
* by localLocation's value. This does <b>not</b>
* cause the underlying file system contents of that resource to be deleted.
* If {@link IResource#REPLACE} is not specified, this method will
* fail if an existing resource exists of the same name.
* </p>
* <p>
* The {@link IResource#HIDDEN} update flag indicates that this resource
* should immediately be set as a hidden resource. Specifying this flag
* is equivalent to atomically calling {@link IResource#setHidden(boolean)}
* with a value of <code>true</code> immediately after creating the resource.
* </p>
* <p>
* Update flags other than those listed above are ignored.
* </p>
* <p>
* This method synchronizes this resource with the local file system at the given
* location.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that the file has been added to its parent.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param localLocation a file system path where the file should be linked
* @param updateFlags bit-wise or of update flag constants
* ({@link IResource#ALLOW_MISSING_LOCAL}, {@link IResource#REPLACE} and {@link IResource#HIDDEN})
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource already exists in the workspace.</li>
* <li> The workspace contains a resource of a different type
* at the same path as this resource.</li>
* <li> The parent of this resource does not exist.</li>
* <li> The parent of this resource is not an open project</li>
* <li> The name of this resource is not valid (according to
* <code>IWorkspace.validateName</code>).</li>
* <li> The corresponding location in the local file system does not exist, or
* is relative to an undefined variable, and <code>ALLOW_MISSING_LOCAL</code> is
* not specified.</li>
* <li> The corresponding location in the local file system is occupied
* by a directory (as opposed to a file).</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li>The team provider for the project which contains this folder does not permit
* linked resources.</li>
* <li>This folder's project contains a nature which does not permit linked resources.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResource#isLinked()
* @see IResource#ALLOW_MISSING_LOCAL
* @see IResource#REPLACE
* @see IResource#HIDDEN
* @since 2.1
*/
public void createLink(IPath localLocation, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Creates a new file resource as a member of this handle's parent resource.
* The file's contents will be located in the file specified by the given
* URI. The given URI must be either absolute, or a relative URI whose first path
* segment is the name of a workspace path variable.
* <p>
* The <code>ALLOW_MISSING_LOCAL</code> update flag controls how this
* method deals with cases where the file system file to be linked does
* not exist, or is relative to a workspace path variable that is not defined.
* If <code>ALLOW_MISSING_LOCAL</code> is specified, the operation will succeed
* even if the local file is missing, or the path is relative to an undefined
* variable. If <code>ALLOW_MISSING_LOCAL</code> is not specified, the operation
* will fail in the case where the file system file does not exist or the
* path is relative to an undefined variable.
* </p>
* <p>
* The {@link IResource#REPLACE} update flag controls how this
* method deals with cases where a resource of the same name as the
* prospective link already exists. If {@link IResource#REPLACE}
* is specified, then any existing resource with the same name is removed
* from the workspace to make way for creation of the link. This does <b>not</b>
* cause the underlying file system contents of that resource to be deleted.
* If {@link IResource#REPLACE} is not specified, this method will
* fail if an existing resource exists of the same name.
* </p>
* <p>
* The {@link IResource#HIDDEN} update flag indicates that this resource
* should immediately be set as a hidden resource. Specifying this flag
* is equivalent to atomically calling {@link IResource#setHidden(boolean)}
* with a value of <code>true</code> immediately after creating the resource.
* </p>
* <p>
* Update flags other than those listed above are ignored.
* </p>
* <p>
* This method synchronizes this resource with the file system at the given
* location.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that the file has been added to its parent.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param location a file system URI where the file should be linked
* @param updateFlags bit-wise or of update flag constants
* ({@link IResource#ALLOW_MISSING_LOCAL}, {@link IResource#REPLACE} and {@link IResource#HIDDEN})
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource already exists in the workspace.</li>
* <li> The workspace contains a resource of a different type
* at the same path as this resource.</li>
* <li> The parent of this resource does not exist.</li>
* <li> The parent of this resource is not an open project</li>
* <li> The name of this resource is not valid (according to
* <code>IWorkspace.validateName</code>).</li>
* <li> The corresponding location in the file system does not exist, or
* is relative to an undefined variable, and <code>ALLOW_MISSING_LOCAL</code> is
* not specified.</li>
* <li> The corresponding location in the file system is occupied
* by a directory (as opposed to a file).</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li>The team provider for the project which contains this folder does not permit
* linked resources.</li>
* <li>This folder's project contains a nature which does not permit linked resources.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResource#isLinked()
* @see IResource#ALLOW_MISSING_LOCAL
* @see IResource#REPLACE
* @see IResource#HIDDEN
* @since 3.2
*/
public void createLink(URI location, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Deletes this file from the workspace.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* delete((keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this folder has been removed from its parent.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param force a flag controlling whether resources that are not
* in sync with the local file system will be tolerated
* @param keepHistory a flag controlling whether files under this folder
* should be stored in the workspace's local history
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource could not be deleted for some reason.</li>
* <li> This resource is out of sync with the local file system
* and <code>force</code> is <code>false</code>.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResource#delete(int,IProgressMonitor)
* @see IResourceRuleFactory#deleteRule(IResource)
*/
public void delete(boolean force, boolean keepHistory, IProgressMonitor monitor) throws CoreException;
/**
* Returns the name of a charset to be used when decoding the contents of this
* file into characters.
* <p>
* This refinement of the corresponding {@link IEncodedStorage} method
* is a convenience method, fully equivalent to:
* <pre>
* getCharset(true);
* </pre>
* </p><p>
* <b>Note 1</b>: this method does not check whether the result is a supported
* charset name. Callers should be prepared to handle
* <code>UnsupportedEncodingException</code> where this charset is used.
* </p>
* <p>
* <b>Note 2</b>: this method returns a cached value for the encoding
* that may be out of date if the file is not synchronized with the local file system
* and the encoding has since changed in the file system.
* </p>
*
* @return the name of a charset
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource could not be read.</li>
* <li> This resource is not local.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* </ul>
* @see IFile#getCharset(boolean)
* @see IEncodedStorage#getCharset()
* @see IContainer#getDefaultCharset()
* @since 3.0
*/
public String getCharset() throws CoreException;
/**
* Returns the name of a charset to be used when decoding the contents of this
* file into characters.
* <p>
* If checkImplicit is <code>false</code>, this method will return the
* charset defined by calling <code>setCharset</code>, provided this file
* exists, or <code>null</code> otherwise.
* </p><p>
* If checkImplicit is <code>true</code>, this method uses the following
* algorithm to determine the charset to be returned:
* <ol>
* <li>the charset defined by calling #setCharset, if any, and this file
* exists, or</li>
* <li>the charset automatically discovered based on this file's contents,
* if one can be determined, or</li>
* <li>the default encoding for this file's parent (as defined by
* <code>IContainer#getDefaultCharset</code>).</li>
* </ol>
* </p><p>
* <b>Note 1</b>: this method does not check whether the result is a supported
* charset name. Callers should be prepared to handle
* <code>UnsupportedEncodingException</code> where this charset is used.
* </p>
* <p>
* <b>Note 2</b>: this method returns a cached value for the encoding
* that may be out of date if the file is not synchronized with the local file system
* and the encoding has since changed in the file system.
* </p>
*
* @return the name of a charset, or <code>null</code>
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource could not be read.</li>
* <li> This resource is not local.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* </ul>
* @see IEncodedStorage#getCharset()
* @see IContainer#getDefaultCharset()
* @since 3.0
*/
public String getCharset(boolean checkImplicit) throws CoreException;
/**
* Returns the name of a charset to be used to encode the given contents
* when saving to this file. This file does not have to exist. The character stream is <em>not</em> automatically closed.
* <p>
* This method uses the following algorithm to determine the charset to be returned:
* <ol>
* <li>if this file exists, the charset returned by IFile#getCharset(false), if one is defined, or</li>
* <li>the charset automatically discovered based on the file name and the given contents,
* if one can be determined, or</li>
* <li>the default encoding for the parent resource (as defined by
* <code>IContainer#getDefaultCharset</code>).</li>
* </ol>
* </p><p>
* <b>Note</b>: this method does not check whether the result is a supported
* charset name. Callers should be prepared to handle
* <code>UnsupportedEncodingException</code> where this charset is used.
* </p>
*
* @param reader a character stream containing the contents to be saved into this file
* @return the name of a charset
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li>The given character stream could not be read.</li>
* </ul>
* @see #getCharset(boolean)
* @see IContainer#getDefaultCharset()
* @since 3.1
*/
public String getCharsetFor(Reader reader) throws CoreException;
/**
* Returns a description for this file's current contents. Returns
* <code>null</code> if a description cannot be obtained.
* <p>
* Calling this method produces a similar effect as calling
* <code>getDescriptionFor(getContents(), getName(), IContentDescription.ALL)</code>
* on <code>IContentTypeManager</code>, but provides better
* opportunities for improved performance. Therefore, when manipulating
* <code>IFile</code>s, clients should call this method instead of
* <code>IContentTypeManager.getDescriptionFor</code>.
* </p>
*
* @return a description for this file's current contents, or
* <code>null</code>
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> This resource could not be read.</li>
* <li> This resource is not local.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and {@link ResourcesPlugin#PREF_LIGHTWEIGHT_AUTO_REFRESH} is
* disabled.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* </ul>
* @see IContentDescription
* @see IContentTypeManager#getDescriptionFor(InputStream, String, QualifiedName[])
* @since 3.0
*/
public IContentDescription getContentDescription() throws CoreException;
/**
* Returns an open input stream on the contents of this file.
* <p>
* This refinement of the corresponding {@link IStorage} method
* is a convenience method returning an open input stream. It's equivalent to:
* <pre>
* getContents(RefreshManager#PREF_LIGHTWEIGHT_AUTO_REFRESH);
* </pre>
* </p>
* <p>
* If lightweight auto-refresh is not enabled this method will throw a CoreException
* when opening out-of-sync resources.
* </p>
* The client is responsible for closing the stream when finished.
*
* @return an input stream containing the contents of the file
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> This resource is not local.</li>
* <li> The file-system resource is not a file.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system (and {@link ResourcesPlugin#PREF_LIGHTWEIGHT_AUTO_REFRESH}
* is disabled).</li>
* </ul>
*/
public InputStream getContents() throws CoreException;
/**
* This refinement of the corresponding <code>IStorage</code> method
* returns an open input stream on the contents of this file.
* The client is responsible for closing the stream when finished.
* If force is <code>true</code> the file is opened and an input
* stream returned regardless of the sync state of the file. The file
* is not synchronized with the workspace.
* If force is <code>false</code> the method fails if not in sync.
*
* @param force a flag controlling how to deal with resources that
* are not in sync with the local file system
* @return an input stream containing the contents of the file
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> This resource is not local.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and force is <code>false</code>.</li>
* </ul>
*/
public InputStream getContents(boolean force) throws CoreException;
/**
* Returns a constant identifying the character encoding of this file, or
* ENCODING_UNKNOWN if it could not be determined. The returned constant
* will be one of the ENCODING_* constants defined on IFile.
*
* This method attempts to guess the file's character encoding by analyzing
* the first few bytes of the file. If no identifying pattern is found at the
* beginning of the file, ENC_UNKNOWN will be returned. This method will
* not attempt any complex analysis of the file to make a guess at the
* encoding that is used.
*
* @return The character encoding of this file
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> This resource could not be read.</li>
* <li> This resource is not local.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* </ul>
* @deprecated use IFile#getCharset instead
*/
public int getEncoding() throws CoreException;
/**
* Returns the full path of this file.
* This refinement of the corresponding <code>IStorage</code> and <code>IResource</code>
* methods links the semantics of resource and storage object paths such that
* <code>IFile</code>s always have a path and that path is relative to the
* containing workspace.
*
* @see IResource#getFullPath()
* @see IStorage#getFullPath()
*/
public IPath getFullPath();
/**
* Returns a list of past states of this file known to this workspace.
* Recently added states first.
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @return an array of states of this file
* @exception CoreException if this method fails.
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
*/
public IFileState[] getHistory(IProgressMonitor monitor) throws CoreException;
/**
* Returns the name of this file.
* This refinement of the corresponding <code>IStorage</code> and <code>IResource</code>
* methods links the semantics of resource and storage object names such that
* <code>IFile</code>s always have a name and that name equivalent to the
* last segment of its full path.
*
* @see IResource#getName()
* @see IStorage#getName()
*/
public String getName();
/**
* Returns whether this file is read-only.
* This refinement of the corresponding <code>IStorage</code> and <code>IResource</code>
* methods links the semantics of read-only resources and read-only storage objects.
*
* @see IResource#isReadOnly()
* @see IStorage#isReadOnly()
*/
public boolean isReadOnly();
/**
* Moves this resource to be at the given location.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* move(destination, (keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file has been removed from its parent and a new file
* has been added to the parent of the destination.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param destination the destination path
* @param force a flag controlling whether resources that are not
* in sync with the local file system will be tolerated
* @param keepHistory a flag controlling whether files under this folder
* should be stored in the workspace's local history
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this resource could not be moved. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> This resource is not local.</li>
* <li> The resource corresponding to the parent destination path does not exist.</li>
* <li> The resource corresponding to the parent destination path is a closed
* project.</li>
* <li> A resource at destination path does exist.</li>
* <li> A resource of a different type exists at the destination path.</li>
* <li> This resource is out of sync with the local file system
* and <code>force</code> is <code>false</code>.</li>
* <li> The workspace and the local file system are out of sync
* at the destination resource or one of its descendents.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
*
* @see IResource#move(IPath,int,IProgressMonitor)
* @see IResourceRuleFactory#moveRule(IResource, IResource)
*/
public void move(IPath destination, boolean force, boolean keepHistory, IProgressMonitor monitor) throws CoreException;
/**
* Sets the charset for this file. Passing a value of <code>null</code>
* will remove the charset setting for this resource.
*
* @param newCharset a charset name, or <code>null</code>
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> An error happened while persisting this setting.</li>
* </ul>
* @see #getCharset()
* @since 3.0
* @deprecated Replaced by {@link #setCharset(String, IProgressMonitor)} which
* is a workspace operation and reports changes in resource deltas.
*/
public void setCharset(String newCharset) throws CoreException;
/**
* Sets the charset for this file. Passing a value of <code>null</code>
* will remove the charset setting for this resource.
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's encoding has changed.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param newCharset a charset name, or <code>null</code>
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> An error happened while persisting this setting.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See {@link IResourceChangeEvent} for more details.</li>
* </ul>
* @see #getCharset()
* @see IResourceRuleFactory#charsetRule(IResource)
* @since 3.0
*/
public void setCharset(String newCharset, IProgressMonitor monitor) throws CoreException;
/**
* Sets the contents of this file to the bytes in the given input stream.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* setContents(source, (keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's contents have been changed.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the new contents of the file
* @param force a flag controlling how to deal with resources that
* are not in sync with the local file system
* @param keepHistory a flag indicating whether or not store
* the current contents in the local history
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>force </code> is <code>false</code>.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see #setContents(java.io.InputStream,int,IProgressMonitor)
*/
public void setContents(InputStream source, boolean force, boolean keepHistory, IProgressMonitor monitor) throws CoreException;
/**
* Sets the contents of this file to the bytes in the given file state.
* <p>
* This is a convenience method, fully equivalent to:
* <pre>
* setContents(source, (keepHistory ? KEEP_HISTORY : IResource.NONE) | (force ? FORCE : IResource.NONE), monitor);
* </pre>
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's content have been changed.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source a previous state of this resource
* @param force a flag controlling how to deal with resources that
* are not in sync with the local file system
* @param keepHistory a flag indicating whether or not store
* the current contents in the local history
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The state does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>force </code> is <code>false</code>.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see #setContents(IFileState,int,IProgressMonitor)
*/
public void setContents(IFileState source, boolean force, boolean keepHistory, IProgressMonitor monitor) throws CoreException;
/**
* Sets the contents of this file to the bytes in the given input stream.
* The stream will get closed whether this method succeeds or fails.
* If the stream is <code>null</code> then the content is set to be the
* empty sequence of bytes.
* <p>
* The <code>FORCE</code> update flag controls how this method deals with
* cases where the workspace is not completely in sync with the local file
* system. If <code>FORCE</code> is not specified, the method will only attempt
* to overwrite a corresponding file in the local file system provided
* it is in sync with the workspace. This option ensures there is no
* unintended data loss; it is the recommended setting.
* However, if <code>FORCE</code> is specified, an attempt will be made
* to write a corresponding file in the local file system, overwriting any
* existing one if need be. In either case, if this method succeeds, the
* resource will be marked as being local (even if it wasn't before).
* </p>
* <p>
* The <code>KEEP_HISTORY</code> update flag controls whether or not a copy of
* current contents of this file should be captured in the workspace's local
* history (properties are not recorded in the local history). The local history
* mechanism serves as a safety net to help the user recover from mistakes that
* might otherwise result in data loss. Specifying <code>KEEP_HISTORY</code>
* is recommended except in circumstances where past states of the files are of
* no conceivable interest to the user. Note that local history is maintained
* with each individual project, and gets discarded when a project is deleted
* from the workspace. This flag is ignored if the file was not previously local.
* </p>
* <p>
* Update flags other than <code>FORCE</code> and <code>KEEP_HISTORY</code>
* are ignored.
* </p>
* <p>
* Prior to modifying the contents of this file, the file modification validator (if provided
* by the VCM plug-in), will be given a chance to perform any last minute preparations. Validation
* is performed by calling <code>IFileModificationValidator.validateSave</code> on this file.
* If the validation fails, then this operation will fail.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's content have been changed.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source an input stream containing the new contents of the file
* @param updateFlags bit-wise or of update flag constants
* (<code>FORCE</code> and <code>KEEP_HISTORY</code>)
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>FORCE</code> is not specified.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResourceRuleFactory#modifyRule(IResource)
* @since 2.0
*/
public void setContents(InputStream source, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Sets the contents of this file to the bytes in the given file state.
* <p>
* The <code>FORCE</code> update flag controls how this method deals with
* cases where the workspace is not completely in sync with the local file
* system. If <code>FORCE</code> is not specified, the method will only attempt
* to overwrite a corresponding file in the local file system provided
* it is in sync with the workspace. This option ensures there is no
* unintended data loss; it is the recommended setting.
* However, if <code>FORCE</code> is specified, an attempt will be made
* to write a corresponding file in the local file system, overwriting any
* existing one if need be. In either case, if this method succeeds, the
* resource will be marked as being local (even if it wasn't before).
* </p>
* <p>
* The <code>KEEP_HISTORY</code> update flag controls whether or not a copy of
* current contents of this file should be captured in the workspace's local
* history (properties are not recorded in the local history). The local history
* mechanism serves as a safety net to help the user recover from mistakes that
* might otherwise result in data loss. Specifying <code>KEEP_HISTORY</code>
* is recommended except in circumstances where past states of the files are of
* no conceivable interest to the user. Note that local history is maintained
* with each individual project, and gets discarded when a project is deleted
* from the workspace. This flag is ignored if the file was not previously local.
* </p>
* <p>
* Update flags other than <code>FORCE</code> and <code>KEEP_HISTORY</code>
* are ignored.
* </p>
* <p>
* Prior to modifying the contents of this file, the file modification validator (if provided
* by the VCM plug-in), will be given a chance to perform any last minute preparations. Validation
* is performed by calling <code>IFileModificationValidator.validateSave</code> on this file.
* If the validation fails, then this operation will fail.
* </p>
* <p>
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that this file's content have been changed.
* </p>
* <p>
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
* </p>
*
* @param source a previous state of this resource
* @param updateFlags bit-wise or of update flag constants
* (<code>FORCE</code> and <code>KEEP_HISTORY</code>)
* @param monitor a progress monitor, or <code>null</code> if progress
* reporting is not desired
* @exception CoreException if this method fails. Reasons include:
* <ul>
* <li> This resource does not exist.</li>
* <li> The state does not exist.</li>
* <li> The corresponding location in the local file system
* is occupied by a directory.</li>
* <li> The workspace is not in sync with the corresponding location
* in the local file system and <code>FORCE</code> is not specified.</li>
* <li> Resource changes are disallowed during certain types of resource change
* event notification. See <code>IResourceChangeEvent</code> for more details.</li>
* <li> The file modification validator disallowed the change.</li>
* </ul>
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see IResourceRuleFactory#modifyRule(IResource)
* @since 2.0
*/
public void setContents(IFileState source, int updateFlags, IProgressMonitor monitor) throws CoreException;
}