Package org.apache.velocity.util.introspection

Class LinkingUberspector

java.lang.Object

org.apache.velocity.util.introspection.UberspectImpl

org.apache.velocity.util.introspection.AbstractChainableUberspector

org.apache.velocity.util.introspection.LinkingUberspector

All Implemented Interfaces:

ChainableUberspector, Uberspect, RuntimeServicesAware

public class LinkingUberspector
extends AbstractChainableUberspector

When the introspector.uberspect.class configuration property contains several uberspector class names, it means those uberspectors will be chained. When an uberspector in the list other than the leftmost does not implement ChainableUberspector, then this utility class is used to provide a basic default chaining where the first non-null result is kept for each introspection call.

Since:

1.6

Version:

$Id: LinkingUberspector.java 10959 2008-07-01 00:12:29Z sdumitriu $

See Also:

ChainableUberspector

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.velocity.util.introspection.UberspectImpl

UberspectImpl.VelGetterImpl, UberspectImpl.VelMethodImpl, UberspectImpl.VelSetterImpl

Field Summary

Fields inherited from class org.apache.velocity.util.introspection.AbstractChainableUberspector

inner

Fields inherited from class org.apache.velocity.util.introspection.UberspectImpl

conversionHandler, introspector, log, rsvc

Constructor Summary

Constructors

Constructor	Description
LinkingUberspector(Uberspect left, Uberspect right)	Constructor that takes the two uberspectors to link

Method Summary

Modifier and Type	Method	Description
Iterator	getIterator(Object obj, Info i)	To support iterative objects used in a #foreach() loop.
VelMethod	getMethod(Object obj, String methodName, Object[] args, Info i)	Method
VelPropertyGet	getPropertyGet(Object obj, String identifier, Info i)	Property getter
VelPropertySet	getPropertySet(Object obj, String identifier, Object arg, Info i)	Property setter
void	init()	init - the chainable uberspector is responsible for the initialization of the wrapped uberspector

Methods inherited from class org.apache.velocity.util.introspection.AbstractChainableUberspector

wrap

Methods inherited from class org.apache.velocity.util.introspection.UberspectImpl

getConversionHandler, setLog, setRuntimeServices

Methods inherited from class java.lang.Object

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

Constructor Detail

LinkingUberspector

public LinkingUberspector(Uberspect left,
                          Uberspect right)

Constructor that takes the two uberspectors to link

Parameters:

left - left uberspector

right - right uberspector

Method Detail

init

public void init()

init - the chainable uberspector is responsible for the initialization of the wrapped uberspector

Init both wrapped uberspectors

Specified by:

init in interface Uberspect

Overrides:

init in class AbstractChainableUberspector

See Also:

Uberspect.init()

getIterator

public Iterator getIterator(Object obj,
                            Info i)

To support iterative objects used in a #foreach() loop.

Specified by:

getIterator in interface Uberspect

Overrides:

getIterator in class AbstractChainableUberspector

Parameters:

obj - The iterative object.

i - Info about the object's location.

Returns:

An Iterator object.

See Also:

Uberspect.getIterator(java.lang.Object, org.apache.velocity.util.introspection.Info)

getMethod

public VelMethod getMethod(Object obj,
                           String methodName,
                           Object[] args,
                           Info i)

Method

Specified by:

getMethod in interface Uberspect

Overrides:

getMethod in class AbstractChainableUberspector

Returns:

A Velocity Method.

See Also:

Uberspect.getMethod(java.lang.Object, java.lang.String, java.lang.Object[], org.apache.velocity.util.introspection.Info)

getPropertyGet

public VelPropertyGet getPropertyGet(Object obj,
                                     String identifier,
                                     Info i)

Property getter

Specified by:

getPropertyGet in interface Uberspect

Overrides:

getPropertyGet in class AbstractChainableUberspector

Returns:

A Velocity Getter Method.

See Also:

Uberspect.getPropertyGet(java.lang.Object, java.lang.String, org.apache.velocity.util.introspection.Info)

getPropertySet

public VelPropertySet getPropertySet(Object obj,
                                     String identifier,
                                     Object arg,
                                     Info i)

Property setter

Specified by:

getPropertySet in interface Uberspect

Overrides:

getPropertySet in class AbstractChainableUberspector

Returns:

A Velocity Setter method.

See Also:

Uberspect.getPropertySet(java.lang.Object, java.lang.String, java.lang.Object, org.apache.velocity.util.introspection.Info)