org.apache.commons.jexl2.internal
Class DuckSetExecutor

java.lang.Object
  org.apache.commons.jexl2.internal.AbstractExecutor
      org.apache.commons.jexl2.internal.AbstractExecutor.Set
          org.apache.commons.jexl2.internal.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 Set { Object set(Object property, Object value); }

Since:

2.0

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.jexl2.internal.AbstractExecutor

AbstractExecutor.Get, AbstractExecutor.Method, AbstractExecutor.Set

Field Summary

Fields inherited from class org.apache.commons.jexl2.internal.AbstractExecutor

method, objectClass, TRY_FAILED

Constructor Summary

DuckSetExecutor(Introspector is, Class<?> clazz, Object key, Object value)
Creates an instance.

Method Summary

Object	execute(Object obj, Object value) Sets the property value of an object.
Object	getTargetProperty() Gets the property targeted by this executor.
Object	tryExecute(Object obj, Object key, Object value) Tries to reuse this executor, checking that it is compatible with the actual set of arguments.

Methods inherited from class org.apache.commons.jexl2.internal.AbstractExecutor.Set

invoke, tryInvoke

Methods inherited from class org.apache.commons.jexl2.internal.AbstractExecutor

equals, equals, getMethod, getMethodName, getTargetClass, hashCode, isAlive, isCacheable, tryFailed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.jexl2.introspection.JexlPropertySet

isCacheable, tryFailed

Constructor Detail

DuckSetExecutor

public DuckSetExecutor(Introspector is,
                       Class<?> clazz,
                       Object key,
                       Object value)

Creates an instance.

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

Method Detail

getTargetProperty

public Object getTargetProperty()

Gets the property targeted by this executor.

Overrides:

getTargetProperty in class AbstractExecutor

Returns:

the target property

execute

public Object execute(Object obj,
                      Object value)
               throws IllegalAccessException,
                      InvocationTargetException

Sets the property value of an object.

Specified by:

execute in class AbstractExecutor.Set

Parameters:

obj - The object to set the property in.

value - The value.

Returns:

The return value.

Throws:

IllegalAccessException - Method is inaccessible.

InvocationTargetException - Method body throws an exception.

tryExecute

public Object tryExecute(Object obj,
                         Object key,
                         Object value)

Tries to reuse this executor, checking that it is compatible with the actual set of arguments.

Compatibility means that: o must be of the same class as this executor's target class, property must be of the same class as this executor's target property (for list and map based executors) and have the same value (for other types) and that arg must be a valid argument for this executor underlying method.

Overrides:

tryExecute in class AbstractExecutor.Set

Parameters:

obj - The object to invoke the method from.

key - The property to set in the object.

value - The value to use as the property value.

Returns:

The return value or TRY_FAILED if checking failed.