org.apache.commons.jexl2.internal
Class PropertyGetExecutor

java.lang.Object
  org.apache.commons.jexl2.internal.AbstractExecutor
      org.apache.commons.jexl2.internal.AbstractExecutor.Get
          org.apache.commons.jexl2.internal.PropertyGetExecutor

All Implemented Interfaces:

JexlPropertyGet

public final class PropertyGetExecutor
extends AbstractExecutor.Get

Specialized executor to get a property from an object.

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

PropertyGetExecutor(Introspector is, Class<?> clazz, String identifier)
Creates an instance by attempting discovery of the get method.

Method Summary

Object	execute(Object o) Gets the property value from an object.
Object	getTargetProperty() Gets the property targeted by this executor.
Object	tryExecute(Object o, Object identifier) 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.Get

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.JexlPropertyGet

isCacheable, tryFailed

Constructor Detail

PropertyGetExecutor

public PropertyGetExecutor(Introspector is,
                           Class<?> clazz,
                           String identifier)

Creates an instance by attempting discovery of the get method.

Parameters:

is - the introspector

clazz - the class to introspect

identifier - the property to get

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 o)
               throws IllegalAccessException,
                      InvocationTargetException

Gets the property value from an object.

Specified by:

execute in class AbstractExecutor.Get

Parameters:

o - The object to get the property from.

Returns:

The property value.

Throws:

IllegalAccessException - Method is inaccessible.

InvocationTargetException - Method body throws an exception.

tryExecute

public Object tryExecute(Object o,
                         Object identifier)

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 and 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).

Overrides:

tryExecute in class AbstractExecutor.Get

Parameters:

o - The object to get the property from.

identifier - The property to get from the object.

Returns:

The property value or TRY_FAILED if checking failed.