Package org.gnome.gio

Class Permission

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeInstance

org.gnome.gobject.GObject

org.gnome.gio.Permission

All Implemented Interfaces:

Proxy

Direct Known Subclasses:

Permission.Permission$Impl, SimplePermission

@Generated("io.github.jwharm.JavaGI")
public abstract class Permission
extends GObject

A GPermission represents the status of the caller’s permission to perform a certain action.

You can query if the action is currently allowed and if it is possible to acquire the permission so that the action will be allowed in the future.

There is also an API to actually acquire the permission and one to release it.

As an example, a GPermission might represent the ability for the user to write to a Settings object. This GPermission object could then be used to decide if it is appropriate to show a “Click here to unlock” button in a dialog and to provide the mechanism to invoke when that button is clicked.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Permission.Builder<B extends Permission.Builder<B>>	Inner class implementing a builder pattern to construct a GObject with properties.
static class	Permission.Permission$Impl	The Permission$Impl type represents a native instance of the abstract Permission class.
static class	Permission.PermissionClass

Nested classes/interfaces inherited from class org.gnome.gobject.GObject

GObject.NotifyCallback, GObject.ObjectClass

Constructor Summary

Constructors

Constructor	Description
Permission()	Creates a new Permission.
Permission(MemorySegment address)	Create a Permission proxy instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
boolean	acquire(@Nullable Cancellable cancellable)	Attempts to acquire the permission represented by permission.
void	acquireAsync(@Nullable Cancellable cancellable, @Nullable AsyncReadyCallback callback)	Attempts to acquire the permission represented by permission.
boolean	acquireFinish(AsyncResult result)	Collects the result of attempting to acquire the permission represented by permission.
protected Permission	asParent()	Returns this instance as if it were its parent type.
boolean	getAllowed()	Gets the value of the 'allowed' property.
boolean	getCanAcquire()	Gets the value of the 'can-acquire' property.
boolean	getCanRelease()	Gets the value of the 'can-release' property.
static MemoryLayout	getMemoryLayout()	The memory layout of the native struct.
static @Nullable Type	getType()	Get the GType of the Permission class
void	implUpdate(boolean allowed, boolean canAcquire, boolean canRelease)	This function is called by the GPermission implementation to update the properties of the permission.
boolean	release(@Nullable Cancellable cancellable)	Attempts to release the permission represented by permission.
void	releaseAsync(@Nullable Cancellable cancellable, @Nullable AsyncReadyCallback callback)	Attempts to release the permission represented by permission.
boolean	releaseFinish(AsyncResult result)	Collects the result of attempting to release the permission represented by permission.

Methods inherited from class org.gnome.gobject.GObject

addToggleRef, addWeakPointer, bindProperty, bindProperty, bindProperty, bindPropertyFull, bindPropertyFull, bindPropertyWithClosures, bindPropertyWithClosures, builder, compatControl, connect, connect, connect, constructed, disconnect, dispatchPropertiesChanged, dispose, dupData, dupQdata, emit, emitNotify, finalize_, forceFloating, freezeNotify, get, getData, getProperty, getProperty, getProperty, getQdata, getv, interfaceFindProperty, interfaceInstallProperty, interfaceListProperties, isFloating, newInstance, newInstance, newv, notify, notify, notifyByPspec, onNotify, ref, refSink, removeToggleRef, removeWeakPointer, replaceData, replaceQdata, runDispose, set, setData, setDataFull, setProperty, setProperty, setProperty, setQdata, setQdataFull, setv, stealData, stealQdata, takeRef, thawNotify, unref, watchClosure, weakRef, weakUnref, withProperties

Methods inherited from class org.gnome.gobject.TypeInstance

callParent, callParent, cast, getPrivate, readGClass, writeGClass

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Permission

public Permission(MemorySegment address)

Create a Permission proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

Permission

public Permission()

Creates a new Permission.

Method Details

getType

public static @Nullable Type getType()

Get the GType of the Permission class

Returns:

the GType

getMemoryLayout

public static MemoryLayout getMemoryLayout()

The memory layout of the native struct.

Returns:

the memory layout

asParent

protected Permission asParent()

Returns this instance as if it were its parent type. This is mostly synonymous to the Java super keyword, but will set the native typeclass function pointers to the parent type. When overriding a native virtual method in Java, "chaining up" with super.methodName() doesn't work, because it invokes the overridden function pointer again. To chain up, call asParent().methodName(). This will call the native function pointer of this virtual method in the typeclass of the parent type.

Overrides:

asParent in class GObject

acquire

public boolean acquire(@Nullable Cancellable cancellable)
                throws GErrorException

Attempts to acquire the permission represented by permission.

The precise method by which this happens depends on the permission and the underlying authentication mechanism. A simple example is that a dialog may appear asking the user to enter their password.

You should check with g_permission_get_can_acquire() before calling this function.

If the permission is acquired then true is returned. Otherwise, false is returned and error is set appropriately.

This call is blocking, likely for a very long time (in the case that user interaction is required). See g_permission_acquire_async() for the non-blocking version.

Parameters:

cancellable - a GCancellable, or null

Returns:

true if the permission was successfully acquired

Throws:

GErrorException - see GError

Since:

2.26

acquireAsync

public void acquireAsync(@Nullable Cancellable cancellable,
 @Nullable AsyncReadyCallback callback)

Attempts to acquire the permission represented by permission.

This is the first half of the asynchronous version of g_permission_acquire().

Parameters:

cancellable - a GCancellable, or null

callback - the GAsyncReadyCallback to call when done

Since:

2.26

acquireFinish

public boolean acquireFinish(AsyncResult result)
                      throws GErrorException

Collects the result of attempting to acquire the permission represented by permission.

This is the second half of the asynchronous version of g_permission_acquire().

Parameters:

result - the GAsyncResult given to the GAsyncReadyCallback

Returns:

true if the permission was successfully acquired

Throws:

GErrorException - see GError

Since:

2.26

getAllowed

public boolean getAllowed()

Gets the value of the 'allowed' property. This property is true if the caller currently has permission to perform the action that this Permission represents the permission to perform.

Returns:

the value of the 'allowed' property

Since:

2.26

getCanAcquire

public boolean getCanAcquire()

Gets the value of the 'can-acquire' property. This property is true if it is generally possible to acquire the permission by calling g_permission_acquire().

Returns:

the value of the 'can-acquire' property

Since:

2.26

getCanRelease

public boolean getCanRelease()

Gets the value of the 'can-release' property. This property is true if it is generally possible to release the permission by calling g_permission_release().

Returns:

the value of the 'can-release' property

Since:

2.26

implUpdate

public void implUpdate(boolean allowed,
 boolean canAcquire,
 boolean canRelease)

This function is called by the GPermission implementation to update the properties of the permission. You should never call this function except from a GPermission implementation.

GObject notify signals are generated, as appropriate.

Parameters:

allowed - the new value for the 'allowed' property

canAcquire - the new value for the 'can-acquire' property

canRelease - the new value for the 'can-release' property

Since:

2.26

release

public boolean release(@Nullable Cancellable cancellable)
                throws GErrorException

Attempts to release the permission represented by permission.

The precise method by which this happens depends on the permission and the underlying authentication mechanism. In most cases the permission will be dropped immediately without further action.

You should check with g_permission_get_can_release() before calling this function.

If the permission is released then true is returned. Otherwise, false is returned and error is set appropriately.

This call is blocking, likely for a very long time (in the case that user interaction is required). See g_permission_release_async() for the non-blocking version.

Parameters:

cancellable - a GCancellable, or null

Returns:

true if the permission was successfully released

Throws:

GErrorException - see GError

Since:

2.26

releaseAsync

public void releaseAsync(@Nullable Cancellable cancellable,
 @Nullable AsyncReadyCallback callback)

Attempts to release the permission represented by permission.

This is the first half of the asynchronous version of g_permission_release().

Parameters:

cancellable - a GCancellable, or null

callback - the GAsyncReadyCallback to call when done

Since:

2.26

releaseFinish

public boolean releaseFinish(AsyncResult result)
                      throws GErrorException

Collects the result of attempting to release the permission represented by permission.

This is the second half of the asynchronous version of g_permission_release().

Parameters:

result - the GAsyncResult given to the GAsyncReadyCallback

Returns:

true if the permission was successfully released

Throws:

GErrorException - see GError

Since:

2.26