Package jakarta.servlet.jsp.el

Class NotFoundELResolver

java.lang.Object
jakarta.el.ELResolver
jakarta.servlet.jsp.el.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

    Modifier and Type
    Method
    Description
    Class<String>
    getCommonPropertyType(jakarta.el.ELContext context, Object base)
    Obtain the most common type that is acceptable for the given base object.
    Iterator<FeatureDescriptor>
    getFeatureDescriptors(jakarta.el.ELContext context, Object base)
    Deprecated, for removal: This API element is subject to removal in a future version.
    Class<Object>
    getType(jakarta.el.ELContext context, Object base, Object property)
    Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.
    Object
    getValue(jakarta.el.ELContext context, Object base, Object property)
    Obtain the value of the given property on the given object using the given context.
    boolean
    isReadOnly(jakarta.el.ELContext context, Object base, Object property)
    Determine if the given property on the given object is read-only using the given context.
    void
    setValue(jakarta.el.ELContext context, Object base, Object property, 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 Details

    • NotFoundELResolver

      public NotFoundELResolver()
      Default constructor.

  • Method Details

    • getValue

      public Object getValue(jakarta.el.ELContext context, Object base, 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 Class<Object> getType(jakarta.el.ELContext context, Object base, Object property)
      Obtain the most generally acceptable type that may be used to set 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, Object base, Object property, 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, Object base, 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 Iterator<FeatureDescriptor> getFeatureDescriptors(jakarta.el.ELContext context, 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 Class<String> getCommonPropertyType(jakarta.el.ELContext context, 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