org.apache.ojb.broker.metadata.fieldaccess
Class PersistentFieldIntrospectorImpl

java.lang.Object
  org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldBase
      org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldIntrospectorImpl

All Implemented Interfaces:

Serializable, PersistentField

Direct Known Subclasses:

PersistentFieldIntrospectorImplNew

public class PersistentFieldIntrospectorImpl
extends PersistentFieldBase

A PersistentField implementation using JavaBeans compliant calls only to access persistent attributes. No Reflection is needed. But for each attribute xxx there must be public getXxx() and setXxx() methods. In metadata the field name must be the bean compliant 'xxx'.

Version:

$Id: PersistentFieldIntrospectorImpl.java,v 1.1 2007-08-24 22:17:35 ewestfal Exp $

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldBase

PATH_TOKEN, rootObjectType

Constructor Summary

PersistentFieldIntrospectorImpl()

PersistentFieldIntrospectorImpl(Class aClass, String aPropertyName)

Method Summary

protected static PropertyDescriptor	findPropertyDescriptor(Class aClass, String aPropertyName) Get the PropertyDescriptor for aClass and aPropertyName
Object	get(Object target) Returns the value of the field represented by this PersistentField, on the specified object.
protected PropertyDescriptor	getPropertyDescriptor() Returns the PropertyDescriptor.
Class	getType()
protected void	logProblem(PropertyDescriptor pd, Object anObject, Object aValue, String msg) Let's give the user some hints as to what could be wrong.
boolean	makeAccessible() This implementation returns always 'false'.
void	set(Object target, Object value) Sets the field represented by this PersistentField object on the specified object argument to the specified new value.
boolean	usesAccessorsAndMutators() Always returns 'false'.

Methods inherited from class org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldBase

buildErrorGetMsg, buildErrorSetMsg, getDeclaringClass, getFieldGraph, getLog, getName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistentFieldIntrospectorImpl

public PersistentFieldIntrospectorImpl()

PersistentFieldIntrospectorImpl

public PersistentFieldIntrospectorImpl(Class aClass,
                                       String aPropertyName)

Method Detail

getType

public Class getType()

set

public void set(Object target,
                Object value)
         throws MetadataException

Description copied from interface: PersistentField

Sets the field represented by this PersistentField object on the specified object argument to the specified new value. The new value is automatically unwrapped if the underlying field has a primitive type. This implementation invokes set() on its underlying Field object if the argument is not null. OBS IllegalArgumentExceptions are wrapped as PersistenceBrokerExceptions.

Parameters:

target - The target object (no proxy objects allowed).

value - The value to set.

Throws:

MetadataException - if there is an error setting this field value on obj

See Also:

Field

get

public Object get(Object target)
           throws MetadataException

Description copied from interface: PersistentField

Returns the value of the field represented by this PersistentField, on the specified object. This implementation invokes get() on its underlying Field object.

Parameters:

target - - The object instance (proxy objects are not allowed here) which we are trying to get the field value from.

Throws:

MetadataException - if there is an error getting this field value from obj

See Also:

Field

findPropertyDescriptor

protected static PropertyDescriptor findPropertyDescriptor(Class aClass,
                                                           String aPropertyName)

Get the PropertyDescriptor for aClass and aPropertyName

getPropertyDescriptor

protected PropertyDescriptor getPropertyDescriptor()

Returns the PropertyDescriptor.

Returns:

java.beans.PropertyDescriptor

makeAccessible

public boolean makeAccessible()

This implementation returns always 'false'.

Specified by:

makeAccessible in class PersistentFieldBase

usesAccessorsAndMutators

public boolean usesAccessorsAndMutators()

Always returns 'false'.

See Also:

PersistentField.usesAccessorsAndMutators()

logProblem

protected void logProblem(PropertyDescriptor pd,
                          Object anObject,
                          Object aValue,
                          String msg)

Let's give the user some hints as to what could be wrong.