Package javax.el
Class BeanELResolver
java.lang.Object
javax.el.ELResolver
javax.el.BeanELResolver
Standard ELResolver for working with JavaBeans.
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Field Summary
Fields inherited from class javax.el.ELResolver
RESOLVABLE_AT_DESIGN_TIME, TYPE -
Constructor Summary
ConstructorsConstructorDescriptionCreates a writable instance of the standard JavaBean resolver.BeanELResolver(boolean readOnly) Creates an instance of the standard JavaBean resolver. -
Method Summary
Modifier and TypeMethodDescriptionClass<?>getCommonPropertyType(ELContext context, Object base) Obtain the most common type that is acceptable for the given base object.getFeatureDescriptors(ELContext context, Object base) Obtain the feature descriptors for the resolvable properties of the given object.Class<?>Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.Obtain the value of the given property on the given object using the given context.Invokes a method on the the given object.booleanisReadOnly(ELContext context, Object base, Object property) Determine if the given property on the given object is read-only using the given context.voidSet the value of the given property on the given object using the given context.Methods inherited from class javax.el.ELResolver
convertToType
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Constructor Details
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BeanELResolver
public BeanELResolver()Creates a writable instance of the standard JavaBean resolver. -
BeanELResolver
public BeanELResolver(boolean readOnly) Creates an instance of the standard JavaBean resolver.- Parameters:
readOnly-trueif the created instance should be read-only otherwise false.
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Method Details
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getType
Description copied from class:ELResolverObtain the most generally acceptable type that may be used to set the given property on the given object using the given context.- Specified by:
getTypein classELResolver- Parameters:
context- The EL context for this evaluationbase- The base object on which the property is to be foundproperty- The property whose type is to be returned- Returns:
- the most general type that maybe used to set the provided property or
nullif the resolver is read-only.
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getValue
Description copied from class:ELResolverObtain the value of the given property on the given object using the given context.- Specified by:
getValuein classELResolver- Parameters:
context- The EL context for this evaluationbase- The base object on which the property is to be foundproperty- The property whose value is to be returned- Returns:
- the value of the provided property
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setValue
Description copied from class:ELResolverSet the value of the given property on the given object using the given context.- Specified by:
setValuein classELResolver- Parameters:
context- The EL context for this evaluationbase- The base object on which the property is to be foundproperty- The property whose value is to be setvalue- The value to set the property to
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invoke
public Object invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) Description copied from class:ELResolverInvokes a method on the the given object. This default implementation always returnsnull.- Overrides:
invokein classELResolver- Parameters:
context- The EL context for this evaluationbase- The base object on which the method is to be foundmethod- The method to invokeparamTypes- The types of the parameters of the method to invokeparams- The parameters with which to invoke the method- Returns:
- Always
null
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isReadOnly
Description copied from class:ELResolverDetermine if the given property on the given object is read-only using the given context.- Specified by:
isReadOnlyin classELResolver- Parameters:
context- The EL context for this evaluationbase- The base object on which the property is to be foundproperty- The property to be checked for read only status- Returns:
trueif the identified property is read only, otherwisefalse
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getFeatureDescriptors
Description copied from class:ELResolverObtain the feature descriptors for the resolvable properties of the given object.- Specified by:
getFeatureDescriptorsin classELResolver- Parameters:
context- The context in which the examination takes placebase- The object to examine- Returns:
- An iterator, possibly empty, of feature descriptors of the given object
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getCommonPropertyType
Description copied from class:ELResolverObtain the most common type that is acceptable for the given base object.- Specified by:
getCommonPropertyTypein classELResolver- Parameters:
context- The context in which the examination takes placebase- The object to examine- Returns:
- {code null} if the most common type cannot be determine, otherwise the most common type
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