org.apache.commons.jexl2.introspection
Class UberspectImpl

java.lang.Object
  extended by org.apache.commons.jexl2.internal.Introspector
      extended by org.apache.commons.jexl2.introspection.UberspectImpl
All Implemented Interfaces:
Uberspect

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
Version:
$Id: UberspectImpl.java 896952 2010-01-07 18:21:29Z henrib $
Author:
Geir Magnusson Jr., Henning P. Schmiedehausen

Nested Class Summary
static class UberspectImpl.FieldPropertyGet
          A JexlPropertyGet for public fields.
static class UberspectImpl.FieldPropertySet
          A JexlPropertySet for public fields.
 
Field Summary
static java.lang.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
 java.lang.reflect.Constructor<?> getConstructor(java.lang.Object ctorHandle, java.lang.Object[] args, JexlInfo info)
          Returns a class constructor.
 java.lang.reflect.Field getField(java.lang.Object obj, java.lang.String name, JexlInfo info)
          Returns a class field.
 java.util.Iterator<?> getIterator(java.lang.Object obj, JexlInfo info)
          Gets an iterator from an object.
 JexlMethod getMethod(java.lang.Object obj, java.lang.String method, java.lang.Object[] args, JexlInfo info)
          Returns a JexlMethod.
 JexlPropertyGet getPropertyGet(java.lang.Object obj, java.lang.Object identifier, JexlInfo info)
          Property getter.
 JexlPropertySet getPropertySet(java.lang.Object obj, java.lang.Object identifier, java.lang.Object arg, JexlInfo info)
          Property setter.
 
Methods inherited from class org.apache.commons.jexl2.internal.Introspector
base, getConstructor, getField, getFieldNames, getGetExecutor, getMethod, getMethod, getMethodExecutor, getMethodNames, 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 java.lang.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

getIterator

public java.util.Iterator<?> getIterator(java.lang.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

getField

public java.lang.reflect.Field getField(java.lang.Object obj,
                                        java.lang.String name,
                                        JexlInfo info)
Returns a class field.

Parameters:
obj - the object
name - the field name
info - debug info
Returns:
a Field.

getConstructor

public java.lang.reflect.Constructor<?> getConstructor(java.lang.Object ctorHandle,
                                                       java.lang.Object[] args,
                                                       JexlInfo info)
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

getMethod

public JexlMethod getMethod(java.lang.Object obj,
                            java.lang.String method,
                            java.lang.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

getPropertyGet

public JexlPropertyGet getPropertyGet(java.lang.Object obj,
                                      java.lang.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(java.lang.Object obj,
                                      java.lang.Object identifier,
                                      java.lang.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.


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