org.apache.commons.jexl.util.introspection
Class UberspectImpl

java.lang.Object
  org.apache.commons.jexl.util.introspection.UberspectImpl

All Implemented Interfaces:

Uberspect, UberspectLoggable

public class UberspectImpl
extends java.lang.Object
implements Uberspect, UberspectLoggable

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

Since:

1.0

Version:

$Id: UberspectImpl.java 398509 2006-05-01 03:34:35Z dion $

Author:

Geir Magnusson Jr.

Nested Class Summary

class	UberspectImpl.VelGetterImpl
class	UberspectImpl.VelMethodImpl An implementation of VelMethod.
class	UberspectImpl.VelSetterImpl

Field Summary

private static Introspector	introspector the default Velocity introspector.
private static int	PROPERTY_START_INDEX index of the first character of the property.
private org.apache.commons.logging.Log	rlog Our runtime logger.

Constructor Summary

UberspectImpl()

Method Summary

java.util.Iterator	getIterator(java.lang.Object obj, Info i) To support iteratives - #foreach().
VelMethod	getMethod(java.lang.Object obj, java.lang.String methodName, java.lang.Object[] args, Info i) Returns a general method, corresponding to $foo.bar( $woogie ).
VelPropertyGet	getPropertyGet(java.lang.Object obj, java.lang.String identifier, Info i) Property getter - returns VelPropertyGet appropos for #set($foo = $bar.woogie).
VelPropertySet	getPropertySet(java.lang.Object obj, java.lang.String identifier, java.lang.Object arg, Info i) Property setter - returns VelPropertySet appropos for #set($foo.bar = "geir").
void	init() init - does nothing - we need to have setRuntimeLogger called before getting our introspector, as the default vel introspector depends upon it.
void	setRuntimeLogger(org.apache.commons.logging.Log runtimeLogger) Sets the runtime logger - this must be called before anything else besides init() as to get the logger.

Methods inherited from class java.lang.Object

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

Field Detail

PROPERTY_START_INDEX

private static final int PROPERTY_START_INDEX

index of the first character of the property.

See Also:

Constant Field Values

rlog

private org.apache.commons.logging.Log rlog

Our runtime logger.

introspector

private static Introspector introspector

the default Velocity introspector.

Constructor Detail

UberspectImpl

public UberspectImpl()

Method Detail

init

public void init()
          throws java.lang.Exception

init - does nothing - we need to have setRuntimeLogger called before getting our introspector, as the default vel introspector depends upon it.

Specified by:

init in interface Uberspect

Throws:

java.lang.Exception - on any error.

setRuntimeLogger

public void setRuntimeLogger(org.apache.commons.logging.Log runtimeLogger)

Sets the runtime logger - this must be called before anything else besides init() as to get the logger. Makes the pull model appealing...

Specified by:

setRuntimeLogger in interface UberspectLoggable

Parameters:

runtimeLogger - service to use for logging.

getIterator

public java.util.Iterator getIterator(java.lang.Object obj,
                                      Info i)
                               throws java.lang.Exception

To support iteratives - #foreach().

Specified by:

getIterator in interface Uberspect

Parameters:

obj - to get the iterator for.

i - template info.

Returns:

an iterator over obj.

Throws:

java.lang.Exception - on any error.

getMethod

public VelMethod getMethod(java.lang.Object obj,
                           java.lang.String methodName,
                           java.lang.Object[] args,
                           Info i)
                    throws java.lang.Exception

Returns a general method, corresponding to $foo.bar( $woogie ).

Specified by:

getMethod in interface Uberspect

Parameters:

obj - the object

methodName - the method name

args - method arguments

i - template info

Returns:

a VelMethod.

Throws:

java.lang.Exception - on any error.

getPropertyGet

public VelPropertyGet getPropertyGet(java.lang.Object obj,
                                     java.lang.String identifier,
                                     Info i)
                              throws java.lang.Exception

Property getter - returns VelPropertyGet appropos for #set($foo = $bar.woogie).

Specified by:

getPropertyGet in interface Uberspect

Parameters:

obj - the object to get the property from.

identifier - property name

i - template info

Returns:

a VelPropertyGet.

Throws:

java.lang.Exception - on any error.

getPropertySet

public VelPropertySet getPropertySet(java.lang.Object obj,
                                     java.lang.String identifier,
                                     java.lang.Object arg,
                                     Info i)
                              throws java.lang.Exception

Property setter - returns VelPropertySet appropos for #set($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.

i - template info

Returns:

a VelPropertySet.

Throws:

java.lang.Exception - on any error.