public class DataContextImpl extends java.lang.Object implements DataContext
DataContext
which commits data to DataManager
.Modifier and Type | Class and Description |
---|---|
protected class |
DataContextImpl.EmbeddedPropertyChangeListener |
protected class |
DataContextImpl.PropertyChangeListener |
DataContext.ChangeEvent, DataContext.PostCommitEvent, DataContext.PreCommitEvent
Modifier and Type | Field and Description |
---|---|
protected org.springframework.context.ApplicationContext |
applicationContext |
protected java.util.function.Function<CommitContext,java.util.Set<Entity>> |
commitDelegate |
protected java.util.Map<java.lang.Class<?>,java.util.Map<java.lang.Object,Entity>> |
content |
protected boolean |
disableListeners |
protected java.util.Map<Entity,java.util.Map<java.lang.String,DataContextImpl.EmbeddedPropertyChangeListener>> |
embeddedPropertyListeners |
protected com.haulmont.bali.events.EventHub |
events |
protected java.util.Set<Entity> |
modifiedInstances |
protected DataContextImpl |
parentContext |
protected DataContextImpl.PropertyChangeListener |
propertyChangeListener |
protected java.util.Set<Entity> |
removedInstances |
Constructor and Description |
---|
DataContextImpl(org.springframework.context.ApplicationContext applicationContext) |
Modifier and Type | Method and Description |
---|---|
com.haulmont.bali.events.Subscription |
addChangeListener(java.util.function.Consumer<DataContext.ChangeEvent> listener)
Adds a listener to
DataContext.ChangeEvent . |
com.haulmont.bali.events.Subscription |
addPostCommitListener(java.util.function.Consumer<DataContext.PostCommitEvent> listener)
Adds a listener to
DataContext.PostCommitEvent . |
com.haulmont.bali.events.Subscription |
addPreCommitListener(java.util.function.Consumer<DataContext.PreCommitEvent> listener)
Adds a listener to
DataContext.PreCommitEvent . |
void |
commit()
Commits changed and removed instances to the middleware.
|
protected java.util.Set<Entity> |
commitToDataManager() |
protected java.util.Set<Entity> |
commitToParentContext() |
boolean |
contains(Entity entity)
Returns true if the context contains the given entity (distinguished by its class and id).
|
protected Entity |
copyEntity(Entity srcEntity) |
protected void |
copySystemState(Entity srcEntity,
Entity dstEntity) |
<T extends Entity> |
create(java.lang.Class<T> entityClass)
Creates an entity instance and merge it into the context.
|
protected java.util.List<Entity> |
createObservableList(Entity notifiedEntity) |
protected java.util.List<Entity> |
createObservableList(java.util.List<Entity> list,
Entity notifiedEntity) |
protected java.util.Set<Entity> |
createObservableSet(Entity notifiedEntity) |
protected ObservableSet<Entity> |
createObservableSet(java.util.Set<Entity> set,
Entity notifiedEntity) |
boolean |
enableListeners(boolean enable)
INTERNAL.
|
void |
evict(Entity entity)
Removes the entity from the context so the context stops tracking it.
|
protected java.util.Collection |
filterCommittedInstances(java.util.Set<Entity> instances) |
<T extends Entity<K>,K> |
find(java.lang.Class<T> entityClass,
K entityId)
Returns an entity instance by its class and id.
|
<T extends Entity> |
find(T entity)
Returns the instance of entity with the same id if it exists in this context.
|
protected void |
fireChangeListener(Entity entity) |
java.util.Collection<Entity> |
getAll() |
java.util.function.Function<CommitContext,java.util.Set<Entity>> |
getCommitDelegate()
Returns a function which will be used to commit data instead of standard implementation.
|
protected DataManager |
getDataManager() |
protected EntityStates |
getEntityStates() |
protected Metadata |
getMetadata() |
protected MetadataTools |
getMetadataTools() |
DataContext |
getParent()
Returns a parent context, if any.
|
boolean |
hasChanges()
Returns true if the context has detected changes in the tracked entities.
|
protected Entity |
internalMerge(Entity entity,
java.util.Set<Entity> mergedSet) |
boolean |
isModified(Entity entity)
Returns true if the context has detected changes in the given entity.
|
boolean |
isRemoved(Entity entity)
Returns true if the context has registered removal of the given entity.
|
EntitySet |
merge(java.util.Collection<? extends Entity> entities)
Merge the given entities into the context.
|
<T extends Entity> |
merge(T entity)
Merge the given entity into the context.
|
protected void |
mergeCommitted(java.util.Set<Entity> committed) |
protected void |
mergeList(java.util.List<Entity> list,
Entity managedEntity,
java.lang.String propertyName,
boolean replace,
java.util.Set<Entity> mergedSet) |
protected void |
mergeSet(java.util.Set<Entity> set,
Entity managedEntity,
java.lang.String propertyName,
boolean replace,
java.util.Set<Entity> mergedSet) |
protected void |
mergeState(Entity srcEntity,
Entity dstEntity,
java.util.Set<Entity> mergedSet) |
protected void |
mergeSystemState(Entity srcEntity,
Entity dstEntity) |
protected void |
modified(Entity entity) |
protected java.util.Set<Entity> |
performCommit() |
java.lang.String |
printContent() |
protected java.lang.String |
printEntity(Entity entity,
int level,
java.util.Set<Entity> visited) |
protected java.lang.String |
printObject(java.lang.Object object) |
void |
remove(Entity entity)
Removes the entity from the context and registers it as deleted.
|
protected void |
removeFromCollections(Entity entityToRemove) |
protected void |
removeListeners(Entity entity) |
void |
setCommitDelegate(java.util.function.Function<CommitContext,java.util.Set<Entity>> delegate)
Sets a function which will be used to commit data instead of standard implementation.
|
void |
setParent(DataContext parentContext)
Sets the parent context.
|
protected org.springframework.context.ApplicationContext applicationContext
protected com.haulmont.bali.events.EventHub events
protected java.util.Map<java.lang.Class<?>,java.util.Map<java.lang.Object,Entity>> content
protected java.util.Set<Entity> modifiedInstances
protected java.util.Set<Entity> removedInstances
protected DataContextImpl.PropertyChangeListener propertyChangeListener
protected boolean disableListeners
protected DataContextImpl parentContext
protected java.util.function.Function<CommitContext,java.util.Set<Entity>> commitDelegate
protected java.util.Map<Entity,java.util.Map<java.lang.String,DataContextImpl.EmbeddedPropertyChangeListener>> embeddedPropertyListeners
public DataContextImpl(org.springframework.context.ApplicationContext applicationContext)
protected Metadata getMetadata()
protected MetadataTools getMetadataTools()
protected EntityStates getEntityStates()
protected DataManager getDataManager()
@Nullable public DataContext getParent()
DataContext
DataContext.commit()
method merges the changed instances
to it instead of sending to the middleware.getParent
in interface DataContext
public void setParent(DataContext parentContext)
DataContext
DataContext.commit()
method merges the changed instances
to it instead of sending to the middleware.setParent
in interface DataContext
public com.haulmont.bali.events.Subscription addChangeListener(java.util.function.Consumer<DataContext.ChangeEvent> listener)
DataContext
DataContext.ChangeEvent
.addChangeListener
in interface DataContext
protected void fireChangeListener(Entity entity)
@Nullable public <T extends Entity<K>,K> T find(java.lang.Class<T> entityClass, K entityId)
DataContext
find
in interface DataContext
@Nullable public <T extends Entity> T find(T entity)
DataContext
find
in interface DataContext
public boolean contains(Entity entity)
DataContext
contains
in interface DataContext
public <T extends Entity> T merge(T entity)
DataContext
If an entity with the same identifier already exists in the context, the passed entity state is copied into it and the existing instance is returned. Otherwise, a copy of the passed instance is registered in the context and returned.
If the given instance is new and the the context doesn't contain an instance with the same identifier, the context
will save the new instance on DataContext.commit()
. Otherwise, even if some attributes of the merged instance are changed
as a result of copying the state of the passed instance, the merged instance will not be committed. Such modifications
are considered as a result of loading more fresh state from the database.
WARNING: use the returned value because it is always a different object instance.
The only case when you get the same instance is if the input was previously returned from the same context as a
result of DataContext.find(Class, Object)
or merge()
.
merge
in interface DataContext
public EntitySet merge(java.util.Collection<? extends Entity> entities)
DataContext
Same as DataContext.merge(Entity)
but for a collection of instances.
merge
in interface DataContext
DataContext.merge(Entity)
protected void mergeState(Entity srcEntity, Entity dstEntity, java.util.Set<Entity> mergedSet)
protected void mergeList(java.util.List<Entity> list, Entity managedEntity, java.lang.String propertyName, boolean replace, java.util.Set<Entity> mergedSet)
protected void mergeSet(java.util.Set<Entity> set, Entity managedEntity, java.lang.String propertyName, boolean replace, java.util.Set<Entity> mergedSet)
protected java.util.List<Entity> createObservableList(java.util.List<Entity> list, Entity notifiedEntity)
protected ObservableSet<Entity> createObservableSet(java.util.Set<Entity> set, Entity notifiedEntity)
public void remove(Entity entity)
DataContext
DataContext.commit()
.
If the given entity is not in the context, nothing happens.
remove
in interface DataContext
protected void removeFromCollections(Entity entityToRemove)
public void evict(Entity entity)
DataContext
If the given entity is not in the context, nothing happens.
evict
in interface DataContext
public <T extends Entity> T create(java.lang.Class<T> entityClass)
DataContext
Same as:
Foo foo = dataContext.merge(metadata.create(Foo.class));
create
in interface DataContext
entityClass
- entity classprotected void removeListeners(Entity entity)
public boolean hasChanges()
DataContext
hasChanges
in interface DataContext
public boolean isModified(Entity entity)
DataContext
isModified
in interface DataContext
public boolean isRemoved(Entity entity)
DataContext
isRemoved
in interface DataContext
public void commit()
DataContext
commit
in interface DataContext
DataContext.setParent(DataContext)
public com.haulmont.bali.events.Subscription addPreCommitListener(java.util.function.Consumer<DataContext.PreCommitEvent> listener)
DataContext
DataContext.PreCommitEvent
.
You can also add an event listener declaratively using a controller method annotated with Subscribe
:
@Subscribe(target = Target.DATA_CONTEXT) protected void onPreCommit(DataContext.PreCommitEvent event) { // handle event here }
addPreCommitListener
in interface DataContext
listener
- listenerpublic com.haulmont.bali.events.Subscription addPostCommitListener(java.util.function.Consumer<DataContext.PostCommitEvent> listener)
DataContext
DataContext.PostCommitEvent
.
You can also add an event listener declaratively using a controller method annotated with Subscribe
:
@Subscribe(target = Target.DATA_CONTEXT) protected void onPostCommit(DataContext.PostCommitEvent event) { // handle event here }
addPostCommitListener
in interface DataContext
listener
- listenerpublic java.util.function.Function<CommitContext,java.util.Set<Entity>> getCommitDelegate()
DataContext
getCommitDelegate
in interface DataContext
public void setCommitDelegate(java.util.function.Function<CommitContext,java.util.Set<Entity>> delegate)
DataContext
setCommitDelegate
in interface DataContext
protected java.util.Set<Entity> performCommit()
protected java.util.Set<Entity> commitToDataManager()
protected java.util.Collection filterCommittedInstances(java.util.Set<Entity> instances)
protected java.util.Set<Entity> commitToParentContext()
protected void mergeCommitted(java.util.Set<Entity> committed)
public java.util.Collection<Entity> getAll()
protected void modified(Entity entity)
public java.lang.String printContent()
protected java.lang.String printEntity(Entity entity, int level, java.util.Set<Entity> visited)
protected java.lang.String printObject(java.lang.Object object)
public boolean enableListeners(boolean enable)
enable
- true to enable, false to disable