Class DuckSetExecutor

  • All Implemented Interfaces:
    JexlPropertySet

    public final class DuckSetExecutor
    extends AbstractExecutor.Set
    Specialized executor to set a property of an object.

    Duck as in duck-typing for an interface like: interface Setable { Object set(Object property, Object value); } or interface Putable { Object put(Object property, Object value); }

    Since:
    2.0
    • Field Detail

      • property

        private final java.lang.Object property
        The property, may be null.
      • valueClass

        private final java.lang.Class<?> valueClass
        The property value class.
    • Constructor Detail

      • DuckSetExecutor

        private DuckSetExecutor​(java.lang.Class<?> clazz,
                                java.lang.reflect.Method method,
                                java.lang.Object key,
                                java.lang.Object value)
        Creates an instance.
        Parameters:
        clazz - the class the set method applies to
        method - the method called through this executor
        key - the key to use as 1st argument to the set method
        value - the value to use as 2nd argument to the set method
    • Method Detail

      • discover

        public static DuckSetExecutor discover​(Introspector is,
                                               java.lang.Class<?> clazz,
                                               java.lang.Object key,
                                               java.lang.Object value)
        Discovers a DuckSetExecutor.
        Parameters:
        is - the introspector
        clazz - the class to find the set method from
        key - the key to use as 1st argument to the set method
        value - the value to use as 2nd argument to the set method
        Returns:
        the executor if found, null otherwise
      • getTargetProperty

        public java.lang.Object getTargetProperty()
        Description copied from class: AbstractExecutor
        Gets the property targeted by this executor.
        Overrides:
        getTargetProperty in class AbstractExecutor
        Returns:
        the target property
      • invoke

        public java.lang.Object invoke​(java.lang.Object obj,
                                       java.lang.Object value)
                                throws java.lang.IllegalAccessException,
                                       java.lang.reflect.InvocationTargetException
        Description copied from interface: JexlPropertySet
        Method used to set the property value of an object.
        Parameters:
        obj - Object on which the property setter will be called with the value
        value - value to be set
        Returns:
        the value returned from the set operation (impl specific)
        Throws:
        java.lang.IllegalAccessException
        java.lang.reflect.InvocationTargetException
      • tryInvoke

        public java.lang.Object tryInvoke​(java.lang.Object obj,
                                          java.lang.Object key,
                                          java.lang.Object value)
        Description copied from interface: JexlPropertySet
        Attempts to reuse this JexlPropertySet, checking that it is compatible with the actual set of arguments.
        Parameters:
        obj - the object to invoke the get upon
        key - the property key to get
        value - the property value to set
        Returns:
        the result of the method invocation that should be checked by tryFailed to determine if it succeeded or failed.