org.springsource.loaded

Class FieldReaderWriter

java.lang.Object

org.springsource.loaded.FieldReaderWriter

Direct Known Subclasses:

ReflectionFieldReaderWriter

public class FieldReaderWriter
extends java.lang.Object

Able to read or write a particular field in a type. Knows nothing about the instance upon which the read/write may be getting done.

Since:

0.5.0

Field Summary

Fields

Modifier and Type	Field and Description
protected FieldMember	theField
protected TypeDescriptor	typeDescriptor The type descriptor for the type that defines the field we want to access

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FieldReaderWriter()
	FieldReaderWriter(FieldMember theField, TypeDescriptor typeDescriptor)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	getStaticFieldValue(java.lang.Class<?> clazz, SSMgr stateManager)
java.lang.Object	getValue(java.lang.Object instance, ISMgr stateManager) Return the value of the field for which is reader-writer exists.
boolean	isStatic()
void	setStaticFieldValue(java.lang.Class<?> clazz, java.lang.Object newValue, SSMgr stateManager)
void	setValue(java.lang.Object instance, java.lang.Object newValue, ISMgr stateManager) Set the value of an instance field on the specified instance to the specified value.

Methods inherited from class java.lang.Object

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

Field Detail

typeDescriptor

protected TypeDescriptor typeDescriptor

The type descriptor for the type that defines the field we want to access

theField

protected FieldMember theField

Constructor Detail

FieldReaderWriter

public FieldReaderWriter(FieldMember theField,
                         TypeDescriptor typeDescriptor)

FieldReaderWriter

protected FieldReaderWriter()

Method Detail

setValue

public void setValue(java.lang.Object instance,
                     java.lang.Object newValue,
                     ISMgr stateManager)
              throws java.lang.IllegalAccessException

Set the value of an instance field on the specified instance to the specified value. If a state manager is passed in things can be done in a more optimal way, otherwise the state manager has to be discovered from the instance.

Parameters:

instance - the object instance upon which to set the field

newValue - the new value for that field

stateManager - the optional state manager for this instance, which will be looked up (expensive) if not passed in

Throws:

java.lang.IllegalAccessException - if the field value cannot be set

setStaticFieldValue

public void setStaticFieldValue(java.lang.Class<?> clazz,
                                java.lang.Object newValue,
                                SSMgr stateManager)
                         throws java.lang.IllegalAccessException

Throws:

java.lang.IllegalAccessException

getValue

public java.lang.Object getValue(java.lang.Object instance,
                                 ISMgr stateManager)
                          throws java.lang.IllegalAccessException,
                                 java.lang.IllegalArgumentException

Return the value of the field for which is reader-writer exists. To improve performance a fieldAccessor can be supplied but if it is missing the code will go and discover it.

Parameters:

instance - the instance for which the field should be fetched

stateManager - an optional state manager containing the map of values (will be discovered if not supplied)

Returns:

the value of the field

Throws:

java.lang.IllegalAccessException - if there is a problem accessing the field value

java.lang.IllegalArgumentException

getStaticFieldValue

public java.lang.Object getStaticFieldValue(java.lang.Class<?> clazz,
                                            SSMgr stateManager)
                                     throws java.lang.IllegalAccessException,
                                            java.lang.IllegalArgumentException

Throws:

java.lang.IllegalAccessException

java.lang.IllegalArgumentException

isStatic

public boolean isStatic()