Package jakarta.el

Class BeanELResolver

  • public class BeanELResolver
extends ELResolver
    Standard ELResolver for working with JavaBeans.

    • Constructor Summary

      Constructors 
      Constructor Description
      BeanELResolver()
      Creates a writable instance of the standard JavaBean resolver.
      BeanELResolver​(boolean readOnly)
      Creates an instance of the standard JavaBean resolver.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Class<?> 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)  
      java.lang.Object invoke​(ELContext context, java.lang.Object base, java.lang.Object method, java.lang.Class<?>[] paramTypes, java.lang.Object[] params)
      Invokes a method on the the given object.
      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

      • BeanELResolver

        public BeanELResolver()
        Creates a writable instance of the standard JavaBean resolver.

      • BeanELResolver

        public BeanELResolver​(boolean readOnly)
        Creates an instance of the standard JavaBean resolver.
        Parameters:
        readOnly - true if the created instance should be read-only otherwise false.

    • Method Detail

      • 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

      • 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

      • 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

      • invoke

        public java.lang.Object invoke​(ELContext context,
                               java.lang.Object base,
                               java.lang.Object method,
                               java.lang.Class<?>[] paramTypes,
                               java.lang.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

      • 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<?> 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