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

    • 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)
      java.lang.Object getValue​(jakarta.el.ELContext context, java.lang.Object base, java.lang.Object property)
      boolean isReadOnly​(jakarta.el.ELContext context, java.lang.Object base, java.lang.Object property)
      void setValue​(jakarta.el.ELContext context, java.lang.Object base, java.lang.Object property, java.lang.Object value)

      • 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()

    • Method Detail

      • getValue

        public java.lang.Object getValue​(jakarta.el.ELContext context,
                                 java.lang.Object base,
                                 java.lang.Object property)

        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)

        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)

        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)

        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