Package jakarta.servlet.jsp.el

Class NotFoundELResolver

  • public class NotFoundELResolver
extends jakarta.el.ELResolver
    The final resolver of the Jakarta Server Pages ELResolver chain. It always resolves the requested value, returning null when it does so.
    Since:
    JSP 3.1

    • Field Summary

      • Fields inherited from class jakarta.el.ELResolver

        RESOLVABLE_AT_DESIGN_TIME, TYPE

    • Constructor Summary

      Constructors 
      Constructor Description
      NotFoundELResolver()
      Default constructor.

    • Method Summary

      All Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      java.lang.Class<java.lang.String> getCommonPropertyType​(jakarta.el.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​(jakarta.el.ELContext context, java.lang.Object base)
      Deprecated, for removal: This API element is subject to removal in a future version.
      java.lang.Class<java.lang.Object> getType​(jakarta.el.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.Object getValue​(jakarta.el.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.
      boolean isReadOnly​(jakarta.el.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.
      void setValue​(jakarta.el.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

        convertToType, invoke

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • NotFoundELResolver

        public NotFoundELResolver()
        Default constructor.

    • Method Detail

      • getValue

        public java.lang.Object getValue​(jakarta.el.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.

        Resolves the property and always returns null unless the provided context contains a Boolean object with value Boolean.TRUE as the value associated with the key jakarta.servlet.jsp.el.NotFoundELResolver.class in which case an exception is thrown. This is to support implementation of the errorOnELNotFound page/tag directive.

        Specified by:
        getValue in class jakarta.el.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:
        Always null
        Throws:
        jakarta.el.PropertyNotFoundException - if the provided context contains a Boolean object with value Boolean.TRUE as the value associated with the key jakarta.servlet.jsp.el.NotFoundELResolver.class

      • getType

        public java.lang.Class<java.lang.Object> getType​(jakarta.el.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.

        In normal usage, ScopedAttributeELResolver will have responded.

        Specified by:
        getType in class jakarta.el.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:
        Always null

      • setValue

        public void setValue​(jakarta.el.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.

        No-op. In normal usage, ScopedAttributeELResolver will have responded.

        Specified by:
        setValue in class jakarta.el.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​(jakarta.el.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.

        In normal usage, ScopedAttributeELResolver will have responded.

        Specified by:
        isReadOnly in class jakarta.el.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:
        Always false

      • getFeatureDescriptors

        @Deprecated(forRemoval=true,
            since="JSP 3.1")
public java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors​(jakarta.el.ELContext context,
                                                                              java.lang.Object base)
        Deprecated, for removal: This API element is subject to removal in a future version.
        Description copied from class: jakarta.el.ELResolver
        Obtain the feature descriptors for the resolvable properties of the given object.

        The default implementation returns null.

        Overrides:
        getFeatureDescriptors in class jakarta.el.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​(jakarta.el.ELContext context,
                                                               java.lang.Object base)
        Obtain the most common type that is acceptable for the given base object.

        In normal usage, ScopedAttributeELResolver will have responded.

        Specified by:
        getCommonPropertyType in class jakarta.el.ELResolver
        Parameters:
        context - The context in which the examination takes place
        base - The object to examine
        Returns:
        Always null