Package org.apache.commons.jexl3.internal.introspection

Class ListGetExecutor

java.lang.Object

org.apache.commons.jexl3.internal.introspection.AbstractExecutor

org.apache.commons.jexl3.internal.introspection.AbstractExecutor.Get

org.apache.commons.jexl3.internal.introspection.ListGetExecutor

All Implemented Interfaces:

JexlPropertyGet

public final class ListGetExecutor
extends AbstractExecutor.Get

Specialized executor to get a property from a List or array.

Since:

2.0

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.jexl3.internal.introspection.AbstractExecutor

AbstractExecutor.Get, AbstractExecutor.Method, AbstractExecutor.Set

Field Summary

Fields

Modifier and Type	Field	Description
private static java.lang.reflect.Method	ARRAY_GET	The java.lang.reflect.Array.get method used as an active marker in ListGet.
private static java.lang.reflect.Method	LIST_GET	The java.util.obj.get method used as an active marker in ListGet.
private java.lang.Integer	property	The property.

Fields inherited from class org.apache.commons.jexl3.internal.introspection.AbstractExecutor

method, objectClass, TRY_FAILED

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ListGetExecutor(java.lang.Class<?> clazz, java.lang.reflect.Method method, java.lang.Integer index)	Creates an instance.

Method Summary

Modifier and Type	Method	Description
static ListGetExecutor	discover(Introspector is, java.lang.Class<?> clazz, java.lang.Integer index)	Attempts to discover a ListGetExecutor.
java.lang.Object	getTargetProperty()	Gets the property targeted by this executor.
java.lang.Object	invoke(java.lang.Object obj)	Method used to get the property value of an object.
java.lang.Object	tryInvoke(java.lang.Object obj, java.lang.Object identifier)	Attempts to reuse this JexlPropertyGet, checking that it is compatible with the actual set of arguments.

Methods inherited from class org.apache.commons.jexl3.internal.introspection.AbstractExecutor

castInteger, castString, classOf, equals, equals, getMethod, getMethodName, getTargetClass, hashCode, initMarker, isAlive, isCacheable, makeArgs, tryFailed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.jexl3.introspection.JexlPropertyGet

isCacheable, isConstant, tryFailed

Field Detail

ARRAY_GET

private static final java.lang.reflect.Method ARRAY_GET

The java.lang.reflect.Array.get method used as an active marker in ListGet.

LIST_GET

private static final java.lang.reflect.Method LIST_GET

The java.util.obj.get method used as an active marker in ListGet.

property

private final java.lang.Integer property

The property.

Constructor Detail

ListGetExecutor

private ListGetExecutor(java.lang.Class<?> clazz,
                        java.lang.reflect.Method method,
                        java.lang.Integer index)

Creates an instance.

Parameters:

clazz - he class the get method applies to

method - the method held by this executor

index - the index to use as an argument to the get method

Method Detail

discover

public static ListGetExecutor discover(Introspector is,
                                       java.lang.Class<?> clazz,
                                       java.lang.Integer index)

Attempts to discover a ListGetExecutor.

Parameters:

is - the introspector

clazz - the class to find the get method from

index - the index to use as an argument to the get 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)

Description copied from interface: JexlPropertyGet

Method used to get the property value of an object.

Parameters:

obj - the object to get the property value from.

Returns:

the property value.

tryInvoke

public java.lang.Object tryInvoke(java.lang.Object obj,
                                  java.lang.Object identifier)

Description copied from interface: JexlPropertyGet

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

Parameters:

obj - the object to invoke the property get upon

identifier - the property key to get

Returns:

the result of the method invocation that should be checked by tryFailed to determine if it succeeded or failed.