Package jakarta.el
Class TypeConverter
- java.lang.Object
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- jakarta.el.ELResolver
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- jakarta.el.TypeConverter
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public abstract class TypeConverter extends ELResolver
- Since:
- EL 3.0
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Field Summary
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Fields inherited from class jakarta.el.ELResolver
RESOLVABLE_AT_DESIGN_TIME, TYPE
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Constructor Summary
Constructors Constructor Description TypeConverter()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods Modifier and Type Method Description abstract <T> TconvertToType(ELContext context, java.lang.Object obj, java.lang.Class<T> type)Converts the given object to the given type.java.lang.Class<?>getCommonPropertyType(ELContext context, java.lang.Object base)Obtain the most common type that is acceptable for the given base object.java.util.Iterator<java.beans.FeatureDescriptor>getFeatureDescriptors(ELContext context, java.lang.Object base)Deprecated, for removal: This API element is subject to removal in a future version.java.lang.Class<?>getType(ELContext context, java.lang.Object base, java.lang.Object property)Obtain the type of the given property on the given object using the given context.java.lang.ObjectgetValue(ELContext context, java.lang.Object base, java.lang.Object property)Obtain the value of the given property on the given object using the given context.booleanisReadOnly(ELContext context, java.lang.Object base, java.lang.Object property)Determine if the given property on the given object is read-only using the given context.voidsetValue(ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value)Set the value of the given property on the given object using the given context.-
Methods inherited from class jakarta.el.ELResolver
invoke
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Method Detail
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getValue
public java.lang.Object getValue(ELContext context, java.lang.Object base, java.lang.Object property)
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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getType
public java.lang.Class<?> getType(ELContext context, java.lang.Object base, java.lang.Object property)
Description copied from class:ELResolverObtain the type of 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 type of the provided property
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setValue
public void setValue(ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value)
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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isReadOnly
public boolean isReadOnly(ELContext context, java.lang.Object base, java.lang.Object property)
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
@Deprecated(forRemoval=true, since="EL 5.0") public java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors(ELContext context, java.lang.Object base)Deprecated, for removal: This API element is subject to removal in a future version.Description copied from class:ELResolverObtain the feature descriptors for the resolvable properties of the given object.The default implementation returns
null.- Overrides:
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
public java.lang.Class<?> getCommonPropertyType(ELContext context, java.lang.Object base)
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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convertToType
public abstract <T> T convertToType(ELContext context, java.lang.Object obj, java.lang.Class<T> type)
Description copied from class:ELResolverConverts the given object to the given type. This default implementation always returnsnull.- Overrides:
convertToTypein classELResolver- Type Parameters:
T- The type to which the object should be converted- Parameters:
context- The EL context for this evaluationobj- The object to converttype- The type to which the object should be converted- Returns:
- Always
null
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