Package javax.el

Class BeanNameResolver


  • public abstract class BeanNameResolver
extends java.lang.Object
    Resolves a bean by its known name. This class can be extended to return a bean object given its name, to set a value to an existing bean, or to create a bean with the value.
    Since:
    EL 3.0
    See Also:
    BeanNameELResolver

    • Constructor Summary

      Constructors 
      Constructor Description
      BeanNameResolver​()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean canCreateBean​(java.lang.String beanName)
      Allow creating a bean of the given name if it does not exist.
      java.lang.Object getBean​(java.lang.String beanName)
      Returns the bean known by its name.
      boolean isNameResolved​(java.lang.String beanName)
      Returns whether the given name is resolved by the BeanNameResolver
      boolean isReadOnly​(java.lang.String beanName)
      Indicates if the bean of the given name is read-only or writable
      void setBeanValue​(java.lang.String beanName, java.lang.Object value)
      Sets a value to a bean of the given name.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • BeanNameResolver

        public BeanNameResolver​()

    • Method Detail

      • isNameResolved

        public boolean isNameResolved​(java.lang.String beanName)
        Returns whether the given name is resolved by the BeanNameResolver
        Parameters:
        beanName - The name of the bean.
        Returns:
        true if the name is resolved by this BeanNameResolver; false otherwise.

      • getBean

        public java.lang.Object getBean​(java.lang.String beanName)
        Returns the bean known by its name.
        Parameters:
        beanName - The name of the bean.
        Returns:
        The bean with the given name. Can be null.

      • setBeanValue

        public void setBeanValue​(java.lang.String beanName,
                         java.lang.Object value)
                  throws PropertyNotWritableException
        Sets a value to a bean of the given name. If the bean of the given name does not exist and if canCreateBean(java.lang.String) is true, one is created with the given value.
        Parameters:
        beanName - The name of the bean
        value - The value to set the bean to. Can be null.
        Throws:
        PropertyNotWritableException - if the bean cannot be modified or created.

      • isReadOnly

        public boolean isReadOnly​(java.lang.String beanName)
        Indicates if the bean of the given name is read-only or writable
        Parameters:
        beanName - The name of the bean
        Returns:
        true if the bean can be set to a new value. false otherwise.

      • canCreateBean

        public boolean canCreateBean​(java.lang.String beanName)
        Allow creating a bean of the given name if it does not exist.
        Parameters:
        beanName - The name of the bean
        Returns:
        true if bean creation is supported false otherwise.