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/*******************************************************************************
* Copyright (c) 2000, 2014 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Serge Beauchamp (Freescale Semiconductor) - [252996] add addFilter/removeFilter/getFilters
*******************************************************************************/
package org.eclipse.core.resources;
import org.eclipse.core.filesystem.IFileInfo;
import org.eclipse.core.runtime.*;
/**
* Interface for resources which may contain
* other resources (termed its members). While the
* workspace itself is not considered a container in this sense, the
* workspace root resource is a container.
*
* Containers implement the IAdaptable interface;
* extensions are managed by the platform's adapter manager.
*
*
* @see Platform#getAdapterManager()
* @see IProject
* @see IFolder
* @see IWorkspaceRoot
* @noimplement This interface is not intended to be implemented by clients.
* @noextend This interface is not intended to be extended by clients.
*/
public interface IContainer extends IResource, IAdaptable {
/*====================================================================
* Constants defining which members are wanted:
*====================================================================*/
/**
* Member constant (bit mask value 1) indicating that phantom member resources are
* to be included.
*
* @see IResource#isPhantom()
* @since 2.0
*/
int INCLUDE_PHANTOMS = 1;
/**
* Member constant (bit mask value 2) indicating that team private members are
* to be included.
*
* @see IResource#isTeamPrivateMember()
* @since 2.0
*/
int INCLUDE_TEAM_PRIVATE_MEMBERS = 2;
/**
* Member constant (bit mask value 4) indicating that derived resources
* are to be excluded.
*
* @see IResource#isDerived()
* @since 3.1
*/
int EXCLUDE_DERIVED = 4;
/**
* Member constant (bit mask value 8) indicating that hidden resources
* are to be included.
*
* @see IResource#isHidden()
* @since 3.4
*/
int INCLUDE_HIDDEN = 8;
/**
* Member constant (bit mask value 16) indicating that a resource
* should not be checked for existence.
*
* @see IResource#accept(IResourceProxyVisitor, int)
* @see IResource#accept(IResourceVisitor, int, int)
* @since 3.8
*/
int DO_NOT_CHECK_EXISTENCE = 16;
/**
* Returns whether a resource of some type with the given path
* exists relative to this resource.
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource. Trailing separators are ignored.
* If the path is empty this container is checked for existence.
*
* @param path the path of the resource
* @return true if a resource of some type with the given path
* exists relative to this resource, and false otherwise
* @see IResource#exists()
*/
boolean exists(IPath path);
/**
* Finds and returns the member resource identified by the given path in
* this container, or null if no such resource exists.
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource. Trailing separators and the path's
* device are ignored. If the path is empty this container is returned. Parent
* references in the supplied path are discarded if they go above the workspace
* root.
*
* Note that no attempt is made to exclude team-private member resources
* as with members.
*
* N.B. Unlike the methods which traffic strictly in resource
* handles, this method infers the resulting resource's type from the
* resource existing at the calculated path in the workspace.
*
* Note that path contains a relative path to the resource
* and all path special characters will be interpreted. Passing an empty string
* will result in returning this {@link IContainer} itself.
*
*
* @param path the relative path to the member resource, must be a valid path or path segment
* @return the member resource, or null if no such
* resource exists
* @see #members()
* @see IPath#isValidPath(String)
* @see IPath#isValidSegment(String)
*/
IResource findMember(String path);
/**
* Finds and returns the member resource identified by the given path in
* this container, or null if no such resource exists.
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource. Trailing separators and the path's
* device are ignored. If the path is empty this container is returned. Parent
* references in the supplied path are discarded if they go above the workspace
* root.
*
* If the includePhantoms argument is false,
* only a member resource with the given path that exists will be returned.
* If the includePhantoms argument is true,
* the method also returns a resource if the workspace is keeping track of a
* phantom with that path.
*
* Note that no attempt is made to exclude team-private member resources
* as with members.
*
* N.B. Unlike the methods which traffic strictly in resource
* handles, this method infers the resulting resource's type from the
* resource (or phantom) existing at the calculated path in the workspace.
*
* Note that path contains a relative path to the resource
* and all path special characters will be interpreted. Passing an empty string
* will result in returning this {@link IContainer} itself.
*
*
* @param path the relative path to the member resource, must be a valid path or path segment
* @param includePhantoms true if phantom resources are
* of interest; false if phantom resources are not of
* interest
* @return the member resource, or null if no such
* resource exists
* @see #members(boolean)
* @see IResource#isPhantom()
* @see IPath#isValidPath(String)
* @see IPath#isValidSegment(String)
*/
IResource findMember(String path, boolean includePhantoms);
/**
* Finds and returns the member resource identified by the given path in
* this container, or null if no such resource exists.
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource. Trailing separators and the path's
* device are ignored. If the path is empty this container is returned. Parent
* references in the supplied path are discarded if they go above the workspace
* root.
*
* Note that no attempt is made to exclude team-private member resources
* as with members.
*
* N.B. Unlike the methods which traffic strictly in resource
* handles, this method infers the resulting resource's type from the
* resource existing at the calculated path in the workspace.
*
*
* @param path the path of the desired resource
* @return the member resource, or null if no such
* resource exists
*/
IResource findMember(IPath path);
/**
* Finds and returns the member resource identified by the given path in
* this container, or null if no such resource exists.
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource. Trailing separators and the path's
* device are ignored. If the path is empty this container is returned. Parent
* references in the supplied path are discarded if they go above the workspace
* root.
*
* If the includePhantoms argument is false,
* only a member resource with the given path that exists will be returned.
* If the includePhantoms argument is true,
* the method also returns a resource if the workspace is keeping track of a
* phantom with that path.
*
* Note that no attempt is made to exclude team-private member resources
* as with members.
*
* N.B. Unlike the methods which traffic strictly in resource
* handles, this method infers the resulting resource's type from the
* resource (or phantom) existing at the calculated path in the workspace.
*
*
* @param path the path of the desired resource
* @param includePhantoms true if phantom resources are
* of interest; false if phantom resources are not of
* interest
* @return the member resource, or null if no such
* resource exists
* @see #members(boolean)
* @see IResource#isPhantom()
*/
IResource findMember(IPath path, boolean includePhantoms);
/**
* Returns the default charset for resources in this container.
*
* This is a convenience method, fully equivalent to:
*
* getDefaultCharset(true);
*
*
* Note that this method does not check whether the result is a supported
* charset name. Callers should be prepared to handle
* UnsupportedEncodingException where this charset is used.
*
*
* @return the name of the default charset encoding for this container
* @exception CoreException if this method fails
* @see IContainer#getDefaultCharset(boolean)
* @see IFile#getCharset()
* @since 3.0
*/
String getDefaultCharset() throws CoreException;
/**
* Returns the default charset for resources in this container.
*
* If checkImplicit is false, this method
* will return the charset defined by calling #setDefaultCharset, provided this
* container exists, or null otherwise.
*
* If checkImplicit is true, this method uses the following
* algorithm to determine the charset to be returned:
*
* - the one explicitly set by calling #setDefaultCharset
* (with a non-null argument) on this container, if any, and this container
* exists, or
* - the parent's default charset, if this container has a parent (is not the
* workspace root), or
* - the charset returned by ResourcesPlugin#getEncoding.
*
*
* Note that this method does not check whether the result is a supported
* charset name. Callers should be prepared to handle
* UnsupportedEncodingException where this charset is used.
*
* @return the name of the default charset encoding for this container,
* or null
* @exception CoreException if this method fails
* @see IFile#getCharset()
* @since 3.0
*/
String getDefaultCharset(boolean checkImplicit) throws CoreException;
/**
* Returns a handle to the file identified by the given path in this
* container.
*
* This is a resource handle operation; neither the resource nor
* the result need exist in the workspace.
* The validation check on the resource name/path is not done
* when the resource handle is constructed; rather, it is done
* automatically as the resource is created.
*
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource and is appended
* to this container's full path to form the full path of the resultant resource.
* A trailing separator is ignored. The path of the resulting resource must
* have at least two segments.
*
*
* @param path the path of the member file
* @return the (handle of the) member file
* @see #getFolder(IPath)
*/
IFile getFile(IPath path);
/**
* Returns a handle to the folder identified by the given path in this
* container.
*
* This is a resource handle operation; neither the resource nor
* the result need exist in the workspace.
* The validation check on the resource name/path is not done
* when the resource handle is constructed; rather, it is done
* automatically as the resource is created.
*
* The supplied path may be absolute or relative; in either case, it is
* interpreted as relative to this resource and is appended
* to this container's full path to form the full path of the resultant resource.
* A trailing separator is ignored. The path of the resulting resource must
* have at least two segments.
*
*
* @param path the path of the member folder
* @return the (handle of the) member folder
* @see #getFile(IPath)
*/
IFolder getFolder(IPath path);
/**
* Returns a list of existing member resources (projects, folders and files)
* in this resource, in no particular order.
*
* This is a convenience method, fully equivalent to members(IResource.NONE).
* Team-private member resources are not included in the result.
*
* Note that the members of a project or folder are the files and folders
* immediately contained within it. The members of the workspace root
* are the projects in the workspace.
*
*
* @return an array of members of this resource
* @exception CoreException if this request fails. Reasons include:
*
* - This resource does not exist.
* - This resource is a project that is not open.
*
* @see #findMember(IPath)
* @see IResource#isAccessible()
*/
IResource[] members() throws CoreException;
/**
* Returns a list of all member resources (projects, folders and files)
* in this resource, in no particular order.
*
* This is a convenience method, fully equivalent to:
*
*
* members(includePhantoms ? INCLUDE_PHANTOMS : IResource.NONE);
*
* Team-private member resources are not included in the result.
*
* @param includePhantoms true if phantom resources are
* of interest; false if phantom resources are not of
* interest
* @return an array of members of this resource
* @exception CoreException if this request fails. Reasons include:
*
* - This resource does not exist.
* -
includePhantoms is false and
* this resource does not exist.
* -
includePhantoms is false and
* this resource is a project that is not open.
*
* @see #members(int)
* @see IResource#exists()
* @see IResource#isPhantom()
*/
IResource[] members(boolean includePhantoms) throws CoreException;
/**
* Returns a list of all member resources (projects, folders and files)
* in this resource, in no particular order.
*
* If the INCLUDE_PHANTOMS flag is not specified in the member
* flags (recommended), only member resources that exist will be returned.
* If the INCLUDE_PHANTOMS flag is specified,
* the result will also include any phantom member resources the
* workspace is keeping track of.
*
* If the INCLUDE_TEAM_PRIVATE_MEMBERS flag is specified
* in the member flags, team private members will be included along with
* the others. If the INCLUDE_TEAM_PRIVATE_MEMBERS flag
* is not specified (recommended), the result will omit any team private
* member resources.
*
* If the {@link #INCLUDE_HIDDEN} flag is specified in the member flags, hidden
* members will be included along with the others. If the {@link #INCLUDE_HIDDEN} flag
* is not specified (recommended), the result will omit any hidden
* member resources.
*
*
* If the EXCLUDE_DERIVED flag is not specified, derived
* resources are included. If the EXCLUDE_DERIVED flag is
* specified in the member flags, derived resources are not included.
*
*
* @param memberFlags bit-wise or of member flag constants
* ({@link #INCLUDE_PHANTOMS}, {@link #INCLUDE_TEAM_PRIVATE_MEMBERS},
* {@link #INCLUDE_HIDDEN} and {@link #EXCLUDE_DERIVED}) indicating which members are of interest
* @return an array of members of this resource
* @exception CoreException if this request fails. Reasons include:
*
* - This resource does not exist.
* - the
INCLUDE_PHANTOMS flag is not specified and
* this resource does not exist.
* - the
INCLUDE_PHANTOMS flag is not specified and
* this resource is a project that is not open.
*
* @see IResource#exists()
* @since 2.0
*/
IResource[] members(int memberFlags) throws CoreException;
/**
* Returns a list of recently deleted files inside this container that
* have one or more saved states in the local history. The depth parameter
* determines how deep inside the container to look. This resource may or
* may not exist in the workspace.
*
* When applied to an existing project resource, this method returns recently
* deleted files with saved states in that project. Note that local history is
* maintained with each individual project, and gets discarded when a project
* is deleted from the workspace. If applied to a deleted project, this method
* returns the empty list.
*
* When applied to the workspace root resource (depth infinity), this method
* returns all recently deleted files with saved states in all existing projects.
*
* When applied to a folder (or project) resource (depth one),
* this method returns all recently deleted member files with saved states.
*
* When applied to a folder resource (depth zero),
* this method returns an empty list unless there was a recently deleted file
* with saved states at the same path as the folder.
*
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
*
*
* @param depth depth limit: one of DEPTH_ZERO, DEPTH_ONE
* or DEPTH_INFINITE
* @param monitor a progress monitor, or null if progress
* reporting and cancellation are not desired
* @return an array of recently deleted files
* @exception CoreException if this method fails
* @see IFile#getHistory(IProgressMonitor)
* @since 2.0
*/
IFile[] findDeletedMembersWithHistory(int depth, IProgressMonitor monitor) throws CoreException;
/**
* Sets the default charset for this container. Passing a value of null
* will remove the default charset setting for this resource.
*
* @param charset a charset string, or null
* @exception CoreException if this method fails Reasons include:
*
* - This resource does not exist.
* - An error happened while persisting this setting.
*
* @see IContainer#getDefaultCharset()
* @since 3.0
* @deprecated Replaced by {@link #setDefaultCharset(String, IProgressMonitor)} which
* is a workspace operation and reports changes in resource deltas.
*/
@Deprecated
void setDefaultCharset(String charset) throws CoreException;
/**
* Sets the default charset for this container. Passing a value of null
* will remove the default charset setting for this resource.
*
* This method changes resources; these changes will be reported
* in a subsequent resource change event, including an indication
* that the encoding of affected resources has been changed.
*
*
* This method is long-running; progress and cancellation are provided
* by the given progress monitor.
*
*
* @param charset a charset string, or null
* @param monitor a progress monitor, or null 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:
*
* - This resource is not accessible.
* - An error happened while persisting this setting.
* - Resource changes are disallowed during certain types of resource change
* event notification. See {@link IResourceChangeEvent} for more details.
*
* @see IContainer#getDefaultCharset()
* @see IResourceRuleFactory#charsetRule(IResource)
* @since 3.0
*/
void setDefaultCharset(String charset, IProgressMonitor monitor) throws CoreException;
/**
* Adds a new filter to this container. Filters restrict the set of files and directories
* in the underlying file system that will be included as members of this container.
*
* The {@link IResource#BACKGROUND_REFRESH} update flag controls when
* changes to the resource hierarchy under this container resulting from the new
* filter take effect. If this flag is specified, the resource hierarchy is updated in a
* separate thread after this method returns. If the flag is not specified, any resource
* changes resulting from the new filter will occur before this method returns.
*
*
* This operation changes resources; these changes will be reported
* in a subsequent resource change event that will include an indication of any
* resources that have been removed as a result of the new filter.
*
*
* This operation is long-running; progress and cancellation are provided
* by the given progress monitor.
*
*
* @param type ({@link IResourceFilterDescription#INCLUDE_ONLY} or
* {@link IResourceFilterDescription#EXCLUDE_ALL} and/or {@link IResourceFilterDescription#INHERITABLE})
* @param matcherDescription the description of the matcher that will determine
* which {@link IFileInfo} instances will be excluded from the resource tree
* @param updateFlags bit-wise or of update flag constants
* ({@link IResource#BACKGROUND_REFRESH})
* @param monitor a progress monitor, or null if progress reporting is not desired
* @return the description of the added filter
* @exception CoreException if this filter could not be added. Reasons include:
*
* - Resource changes are disallowed during certain types of resource change
* event notification. See
IResourceChangeEvent for more details.
*
* @exception OperationCanceledException if the operation is canceled.
* Cancelation can occur even if no progress monitor is provided.
* @see #getFilters()
* @see IResourceFilterDescription#delete(int, IProgressMonitor)
*
* @since 3.6
*/
IResourceFilterDescription createFilter(int type, FileInfoMatcherDescription matcherDescription, int updateFlags, IProgressMonitor monitor) throws CoreException;
/**
* Retrieve all filters on this container.
* If no filters exist for this resource, an empty array is returned.
*
* @return an array of filters
* @exception CoreException if this resource's filters could not be retrieved. Reasons include:
*
* - This resource is not a folder.
*
*
* @see #createFilter(int, FileInfoMatcherDescription, int, IProgressMonitor)
* @see IResourceFilterDescription#delete(int, IProgressMonitor)
* @since 3.6
*/
IResourceFilterDescription[] getFilters() throws CoreException;
}