org.eclipse.emf.transaction.impl
Class ResourceSetManager
java.lang.Object
org.eclipse.emf.transaction.impl.ResourceSetManager
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public final class ResourceSetManager
- extends
Object
The resource set manager keeps track of the load state of
Resources
in a resource set managed by a transactional editing domain. It assists in
the enforcement of write transaction semantics for certain kinds of changes
to the state of a resource (in particular, its contents).
The resource set manager is a singleton rather than a per-editing-domain
instance primarily because the notification filters need to be able to
distinguish events coming from loading/unloading resources, and filters do
not have any editing domain context. This is not a problem, as the resources
are tracked by their object identity, so their states are absolute, not
relative to any particular editing domain.
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Method Summary
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static
ResourceSetManager
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getInstance
()
Obtains the singleton manager instance. |
boolean
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isLoaded
(
Resource res)
Queries whether the specified resource is currently loaded. |
boolean
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isLoading
(
Resource res)
Queries whether the specified resource is currently loading. |
boolean
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isUnloaded
(
Resource res)
Queries whether the specified resource is currently unloaded. |
boolean
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isUnloading
(
Resource res)
Queries whether the specified resource is currently unloading. |
void
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observe
(
Resource res,
Notification notification)
Analyzes a notification from a resource for any potential state change. |
void
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observe
(
ResourceSet rset)
Observes the specified resource set, usually only when the editing domain
is initialized. |
void
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observe
(
ResourceSet rset,
Notification notification)
Analyzes a notification from a resource set for any potential state
changes in its resources. |
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Methods inherited from class java.lang.
Object
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clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
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getInstance
public static
ResourceSetManager getInstance()
- Obtains the singleton manager instance.
-
-
Returns:
- the singleton instance
observe
public void observe(
ResourceSet rset)
- Observes the specified resource set, usually only when the editing domain
is initialized. This resource set may already contain resources in a
variety of states, so I will examine each of them in turn and record
their states.
-
-
Parameters:
-
rset - a resource set
observe
public void observe(
ResourceSet rset,
Notification notification)
- Analyzes a notification from a resource set for any potential state
changes in its resources.
-
-
Parameters:
-
rset - a resource set sending a notification -
notification - the notification from the resource set
observe
public void observe(
Resource res,
Notification notification)
- Analyzes a notification from a resource for any potential state change.
-
-
Parameters:
-
res - a resource -
notification - the notification from the resource
isLoaded
public boolean isLoaded(
Resource res)
- Queries whether the specified resource is currently loaded.
-
-
Parameters:
-
res - a resource
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Returns:
-
true if the resource has completed loading and is
not now unloading; false, otherwise
isLoading
public boolean isLoading(
Resource res)
- Queries whether the specified resource is currently loading.
-
-
Parameters:
-
res - a resource
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Returns:
-
true if the resource is not yet loaded but is in
the process of loading; false, otherwise
isUnloading
public boolean isUnloading(
Resource res)
- Queries whether the specified resource is currently unloading.
-
-
Parameters:
-
res - a resource
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Returns:
-
true if the resource is loaded but is in
the process of unloading; false, otherwise
isUnloaded
public boolean isUnloaded(
Resource res)
- Queries whether the specified resource is currently unloaded.
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Parameters:
-
res - a resource
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Returns:
-
true if the resource has completed unloading and is
not now loading; false, otherwise
