public abstract class ELContext
extends Object
Expression
, an ELContext must be provided. The ELContext holds:
ELResolver
that will be consulted to
resolve model objects and their propertiesFunctionMapper
that will be used to resolve EL
Functions.VariableMapper
that will be used to resolve EL
Variables.ELContextListener
so that applications and
frameworks can ensure their own context objects are attached to any newly
created ELContext. Because it stores state during expression evaluation, an
ELContext object is not thread-safe. Care should be taken to never share an
ELContext instance between two or more threads.Constructor and Description |
---|
ELContext() |
Modifier and Type | Method and Description |
---|---|
Object |
getContext(Class key)
Returns the context object associated with the given key.
|
abstract ELResolver |
getELResolver()
Retrieves the ELResolver associated with this context.
|
abstract FunctionMapper |
getFunctionMapper()
Retrieves the FunctionMapper associated with this ELContext.
|
java.util.Locale |
getLocale()
Get the Locale stored by a previous invocation to
setLocale(Locale) . |
abstract VariableMapper |
getVariableMapper()
Retrieves the VariableMapper associated with this ELContext.
|
boolean |
isPropertyResolved()
Returns whether an
ELResolver has successfully resolved a given
(base, property) pair. |
void |
putContext(Class key,
Object contextObject)
Associates a context object with this ELContext.
|
void |
setLocale(java.util.Locale locale)
Set the Locale for this instance.
|
void |
setPropertyResolved(boolean resolved)
Called to indicate that a ELResolver has successfully resolved a given
(base, property) pair.
|
public Object getContext(Class key)
key
- The unique identifier that was used to associate the context
object with this ELContext.NullPointerException
- if key is null.public abstract ELResolver getELResolver()
public abstract FunctionMapper getFunctionMapper()
public java.util.Locale getLocale()
setLocale(Locale)
. If this method returns non null, this Locale
must be used for all localization needs in the implementation. The Locale
must not be cached to allow for applications that change Locale
dynamically.public abstract VariableMapper getVariableMapper()
public boolean isPropertyResolved()
ELResolver
has successfully resolved a given
(base, property) pair. The CompositeELResolver
checks this property
to determine whether it should consider or skip other component resolvers.CompositeELResolver
public void putContext(Class key, Object contextObject)
key
- The key used by an ELResolver
to identify this context
object.contextObject
- The context object to add to the collection.NullPointerException
- if key is null or contextObject is null.public void setLocale(java.util.Locale locale)
locale
- The Locale in which this instance is operating. Used primarily for
message localization.public void setPropertyResolved(boolean resolved)
CompositeELResolver
checks this property
to determine whether it should consider or skip other component resolvers.resolved
- true if the property has been resolved, or false if not.CompositeELResolver