org.apache.commons.jexl2.internal
Class AbstractExecutor

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

Direct Known Subclasses:

AbstractExecutor.Get, AbstractExecutor.Method, AbstractExecutor.Set

public abstract class AbstractExecutor
extends Object

Abstract class that is used to execute an arbitrary method that is introspected. This is the superclass for all other AbstractExecutor classes.

Since:

1.0

Nested Class Summary

static class	AbstractExecutor.Get Abstract class that is used to execute an arbitrary 'get' method.
static class	AbstractExecutor.Method Abstract class that is used to execute an arbitrary method.
static class	AbstractExecutor.Set Abstract class that is used to execute an arbitrary 'set' method.

Field Summary

protected Method	method Method to be executed.
protected Class<?>	objectClass The class this executor applies to.
static Object	TRY_FAILED A marker for invocation failures in tryInvoke.

Constructor Summary

protected

AbstractExecutor(Class<?> theClass, Method theMethod) Default and sole constructor.

Method Summary

boolean	equals(AbstractExecutor arg) Indicates whether some other executor is equivalent to this one.
boolean	equals(Object obj)
Method	getMethod() Gets the method to be executed or used as a marker.
String	getMethodName() Gets the method name used.
Class<?>	getTargetClass() Gets the object class targeted by this executor.
Object	getTargetProperty() Gets the property targeted by this executor.
int	hashCode()
boolean	isAlive() Tell whether the executor is alive by looking at the value of the method.
boolean	isCacheable() Specifies if this executor is cacheable and able to be reused for this class of object it was returned for.
boolean	tryFailed(Object exec) Checks whether a tryExecute failed or not.

Methods inherited from class java.lang.Object

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

Field Detail

TRY_FAILED

public static final Object TRY_FAILED

A marker for invocation failures in tryInvoke.

objectClass

protected final Class<?> objectClass

The class this executor applies to.

method

protected final Method method

Method to be executed.

Constructor Detail

AbstractExecutor

protected AbstractExecutor(Class<?> theClass,
                           Method theMethod)

Default and sole constructor.

Parameters:

theClass - the class this executor applies to

theMethod - the method held by this executor

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(AbstractExecutor arg)

Indicates whether some other executor is equivalent to this one.

Parameters:

arg - the other executor to check

Returns:

true if both executors are equivalent, false otherwise

isAlive

public final boolean isAlive()

Tell whether the executor is alive by looking at the value of the method.

Returns:

boolean Whether the executor is alive.

isCacheable

public boolean isCacheable()

Specifies if this executor is cacheable and able to be reused for this class of object it was returned for.

Returns:

true if can be reused for this class, false if not

getMethod

public final Method getMethod()

Gets the method to be executed or used as a marker.

Returns:

Method The method used by execute in derived classes.

getTargetClass

public final Class<?> getTargetClass()

Gets the object class targeted by this executor.

Returns:

the target object class

getTargetProperty

public Object getTargetProperty()

Gets the property targeted by this executor.

Returns:

the target property

getMethodName

public final String getMethodName()

Gets the method name used.

Returns:

method name

tryFailed

public final boolean tryFailed(Object exec)

Checks whether a tryExecute failed or not.

Parameters:

exec - the value returned by tryExecute

Returns:

true if tryExecute failed, false otherwise