Package javax.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)
      Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.
      java.lang.Object getValue​(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.
      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)
      Determine if the given property on the given object is read-only using the given context.
      void setValue​(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 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)
        Description copied from class: ELResolver
        Obtain the most generally acceptable type that may be used to set the given property on the given object using the given context.
        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 most general type that maybe used to set the provided property or null if the resolver is read-only.

      • getValue

        public java.lang.Object getValue​(ELContext context,
                                 java.lang.Object base,
                                 java.lang.Object property)
        Description copied from class: ELResolver
        Obtain the value of the given property on the given object using the given context.
        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)
        Description copied from class: ELResolver
        Set the value of the given property on the given object using the given context.
        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

      • isReadOnly

        public boolean isReadOnly​(ELContext context,
                          java.lang.Object base,
                          java.lang.Object property)
        Description copied from class: ELResolver
        Determine if the given property on the given object is read-only using the given context.
        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