org.apache.commons.jexl2.introspection
Class UberspectImpl

java.lang.Object
  org.apache.commons.jexl2.internal.Introspector
      org.apache.commons.jexl2.introspection.UberspectImpl

All Implemented Interfaces:

Uberspect

Direct Known Subclasses:

SandboxUberspectImpl

public class UberspectImpl
extends Introspector
implements Uberspect

Implementation of Uberspect to provide the default introspective functionality of JEXL.

This is the class to derive to customize introspection.

Since:

1.0

Nested Class Summary

static class	UberspectImpl.FieldPropertyGet Deprecated. Do not use externally - will be made private in a later version
static class	UberspectImpl.FieldPropertySet Deprecated. Do not use externally - will be made private in a later version
static class	UberspectImpl.IndexedContainer A generic indexed property container, exposes get(key) and set(key, value) and solves method call dynamically based on arguments.

Field Summary

static Object

TRY_FAILED Publicly exposed special failure object returned by tryInvoke.

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

rlog

Constructor Summary

UberspectImpl(org.apache.commons.logging.Log runtimeLogger)
Creates a new UberspectImpl.

Method Summary

Constructor<?>	getConstructor(Object ctorHandle, Object[] args, JexlInfo info) Deprecated.
JexlMethod	getConstructorMethod(Object ctorHandle, Object[] args, JexlInfo info) Returns a class constructor wrapped in a JexlMethod.
Field	getField(Object obj, String name, JexlInfo info) Returns a class field.
protected JexlPropertyGet	getIndexedGet(Object object, String name) Attempts to find an indexed-property getter in an object.
Iterator<?>	getIterator(Object obj, JexlInfo info) Gets an iterator from an object.
JexlMethod	getMethod(Object obj, String method, Object[] args, JexlInfo info) Returns a JexlMethod.
JexlPropertyGet	getPropertyGet(Object obj, Object identifier, JexlInfo info) Property getter.
JexlPropertySet	getPropertySet(Object obj, Object identifier, Object arg, JexlInfo info) Property setter.
void	setLoader(ClassLoader cloader) Resets this Uberspect class loader.

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

base, getClassByName, getConstructor, getField, getFieldNames, getGetExecutor, getMethod, getMethod, getMethodExecutor, getMethodNames, getMethods, getSetExecutor, setClassLoader, toInteger, toString

Methods inherited from class java.lang.Object

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

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

setClassLoader

Field Detail

TRY_FAILED

public static final Object TRY_FAILED

Publicly exposed special failure object returned by tryInvoke.

Constructor Detail

UberspectImpl

public UberspectImpl(org.apache.commons.logging.Log runtimeLogger)

Creates a new UberspectImpl.

Parameters:

runtimeLogger - the logger used for all logging needs

Method Detail

setLoader

public void setLoader(ClassLoader cloader)

Resets this Uberspect class loader.

Parameters:

cloader - the class loader to use

Since:

2.1

getIterator

public Iterator<?> getIterator(Object obj,
                               JexlInfo info)

Gets an iterator from an object.

Specified by:

getIterator in interface Uberspect

Parameters:

obj - to get the iterator for

info - contextual information

Returns:

an iterator over obj

getMethod

public JexlMethod getMethod(Object obj,
                            String method,
                            Object[] args,
                            JexlInfo info)

Returns a JexlMethod.

Specified by:

getMethod in interface Uberspect

Parameters:

obj - the object

method - the method name

args - method arguments

info - contextual information

Returns:

a JexlMethod

getConstructor

@Deprecated
public Constructor<?> getConstructor(Object ctorHandle,
                                                Object[] args,
                                                JexlInfo info)

Deprecated.

Returns a class constructor.

Specified by:

getConstructor in interface Uberspect

Parameters:

ctorHandle - a class or class name

args - constructor arguments

info - contextual information

Returns:

a Constructor

getConstructorMethod

public JexlMethod getConstructorMethod(Object ctorHandle,
                                       Object[] args,
                                       JexlInfo info)

Returns a class constructor wrapped in a JexlMethod.

Specified by:

getConstructorMethod in interface Uberspect

Parameters:

ctorHandle - a class or class name

args - constructor arguments

info - contextual information

Returns:

a Constructor

Since:

2.1

getPropertyGet

public JexlPropertyGet getPropertyGet(Object obj,
                                      Object identifier,
                                      JexlInfo info)

Property getter.

Returns JexlPropertyGet appropos for ${bar.woogie}.

Specified by:

getPropertyGet in interface Uberspect

Parameters:

obj - the object to get the property from

identifier - property name

info - contextual information

Returns:

a JexlPropertyGet

getPropertySet

public JexlPropertySet getPropertySet(Object obj,
                                      Object identifier,
                                      Object arg,
                                      JexlInfo info)

Property setter.

returns JelPropertySet appropos for ${foo.bar = "geir"}

.

Specified by:

getPropertySet in interface Uberspect

Parameters:

obj - the object to get the property from.

identifier - property name

arg - value to set

info - contextual information

Returns:

a JexlPropertySet.

getField

public Field getField(Object obj,
                      String name,
                      JexlInfo info)

Returns a class field. Only for use by sub-classes, will be made protected in a later version

Parameters:

obj - the object

name - the field name

info - debug info

Returns:

a Field.

getIndexedGet

protected JexlPropertyGet getIndexedGet(Object object,
                                        String name)

Attempts to find an indexed-property getter in an object. The code attempts to find the list of methods getXXX() and setXXX(). Note that this is not equivalent to the strict bean definition of indexed properties; the type of the key is not necessarily an int and the set/get arrays are not resolved.

Parameters:

object - the object

name - the container name

Returns:

a JexlPropertyGet is successfull, null otherwise

Since:

2.1