Package jakarta.el

Class CompositeELResolver

java.lang.Object
jakarta.el.ELResolver
jakarta.el.CompositeELResolver
Direct Known Subclasses:
JasperELResolver
public class CompositeELResolver extends ELResolver

  • Constructor Details

    • CompositeELResolver

      public CompositeELResolver()

  • Method Details

    • add

      public void add(ELResolver elResolver)

    • getValue

      public Object getValue(ELContext context, Object base, Object property)
      Specified by:
      getValue in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      base - The base object on which the property is to be found
      property - The property whose value is to be returned
      Returns:
      the value of the provided property

    • invoke

      public Object invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params)
      Description copied from class: ELResolver
      Invokes a method on the the given object. This default implementation always returns null.
      Overrides:
      invoke in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      base - The base object on which the method is to be found
      method - The method to invoke
      paramTypes - The types of the parameters of the method to invoke
      params - The parameters with which to invoke the method
      Returns:
      Always null
      Since:
      EL 2.2

    • getType

      public Class<?> getType(ELContext context, Object base, Object property)
      Specified by:
      getType in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      base - The base object on which the property is to be found
      property - The property whose type is to be returned
      Returns:
      the type of the provided property

    • setValue

      public void setValue(ELContext context, Object base, Object property, Object value)
      Specified by:
      setValue in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      base - The base object on which the property is to be found
      property - The property whose value is to be set
      value - The value to set the property to

    • isReadOnly

      public boolean isReadOnly(ELContext context, Object base, Object property)
      Specified by:
      isReadOnly in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      base - The base object on which the property is to be found
      property - The property to be checked for read only status
      Returns:
      true if the identified property is read only, otherwise false

    • getFeatureDescriptors

      public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base)
      Description copied from class: ELResolver
      Obtain the feature descriptors for the resolvable properties of the given object.
      Specified by:
      getFeatureDescriptors in class ELResolver
      Parameters:
      context - The context in which the examination takes place
      base - The object to examine
      Returns:
      An iterator, possibly empty, of feature descriptors of the given object

    • getCommonPropertyType

      public Class<?> getCommonPropertyType(ELContext context, Object base)
      Description copied from class: ELResolver
      Obtain the most common type that is acceptable for the given base object.
      Specified by:
      getCommonPropertyType in class ELResolver
      Parameters:
      context - The context in which the examination takes place
      base - The object to examine
      Returns:
      {code null} if the most common type cannot be determine, otherwise the most common type

    • convertToType

      public Object convertToType(ELContext context, Object obj, Class<?> type)
      Description copied from class: ELResolver
      Converts the given object to the given type. This default implementation always returns null.
      Overrides:
      convertToType in class ELResolver
      Parameters:
      context - The EL context for this evaluation
      obj - The object to convert
      type - The type to which the object should be converted
      Returns:
      Always null