Package jakarta.servlet.jsp.el

Class ImplicitObjectELResolver

  • public class ImplicitObjectELResolver
extends ELResolver
    Provides resolution in EL for the implicit variables of a JSP page.
    Since:
    JSP 2.1

    • Constructor Summary

      Constructors 
      Constructor Description
      ImplicitObjectELResolver()
      Creates an instance of the implicit object resolver for EL.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Class<java.lang.String> 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.Object getValue​(ELContext context, java.lang.Object base, java.lang.Object property)  
      boolean isReadOnly​(ELContext context, java.lang.Object base, java.lang.Object property)  
      void setValue​(ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • ImplicitObjectELResolver

        public ImplicitObjectELResolver()
        Creates an instance of the implicit object resolver for EL.

    • Method Detail

      • getValue

        public java.lang.Object getValue​(ELContext context,
                                 java.lang.Object base,
                                 java.lang.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

      • getType

        public java.lang.Class<?> getType​(ELContext context,
                                  java.lang.Object base,
                                  java.lang.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,
                     java.lang.Object base,
                     java.lang.Object property,
                     java.lang.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,
                          java.lang.Object base,
                          java.lang.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 java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors​(ELContext context,
                                                                              java.lang.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 java.lang.Class<java.lang.String> getCommonPropertyType​(ELContext context,
                                                               java.lang.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