Package javax.el
Class TypeConverter
- java.lang.Object
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- javax.el.ELResolver
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- javax.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 javax.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 Modifier and Type Method Description abstract java.lang.ObjectconvertToType(ELContext context, java.lang.Object obj, java.lang.Class<?> 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)Obtain the feature descriptors for the resolvable properties of the given object.java.lang.Class<?>getType(ELContext context, java.lang.Object base, java.lang.Object property)java.lang.ObjectgetValue(ELContext context, java.lang.Object base, java.lang.Object property)booleanisReadOnly(ELContext context, java.lang.Object base, java.lang.Object property)voidsetValue(ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value)-
Methods inherited from class javax.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)
- 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)
- 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)
- 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)
- 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
public java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors(ELContext context, java.lang.Object base)
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
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 java.lang.Object convertToType(ELContext context, java.lang.Object obj, java.lang.Class<?> type)
Description copied from class:ELResolverConverts the given object to the given type. This default implementation always returnsnull.- Overrides:
convertToTypein classELResolver- 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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