SimpleFieldChange (JSimpleDB Main Classes 2.1.2 API)

java.lang.Object
- org.jsimpledb.change.Change<T>
- - org.jsimpledb.change.FieldChange<T>
  - - org.jsimpledb.change.SimpleFieldChange<T,V>

Type Parameters:
T - the type of the object containing the changed field
V - the type of the changed field
```
public class SimpleFieldChange<T,V>
extends FieldChange<T>
```
Notification object that gets passed to @OnChange-annotated methods when a simple field changes.

Constructor Summary

Constructors
Constructor and Description
`SimpleFieldChange(T jobj, int storageId, String fieldName, V oldValue, V newValue)` Constructor.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`apply(JTransaction jtx, JObject jobj)` Apply this change to the given object in the given transaction.
`boolean`	`equals(Object obj)`
`V`	`getNewValue()` Get the value of the field after the change.
`V`	`getOldValue()` Get the value of the field before the change.
`int`	`hashCode()`
`String`	`toString()`
`<R> R`	`visit(ChangeSwitch<R> target)` Apply visitor pattern.

Methods inherited from class org.jsimpledb.change.FieldChange
getFieldName, getStorageId

Methods inherited from class org.jsimpledb.change.Change
apply, apply, apply, getJObject, getObject

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - SimpleFieldChange
```
public SimpleFieldChange(T jobj,
                 int storageId,
                 String fieldName,
                 V oldValue,
                 V newValue)
```
    Constructor.
    
    Parameters:
    jobj - Java object containing the field that changed
    storageId - the storage ID of the affected field
    fieldName - the name of the field that changed
    oldValue - the old field value
    newValue - the new field value
    
    Throws:
    
    IllegalArgumentException - if jobj or fieldName is null
- Method Detail
  - visit
```
public <R> R visit(ChangeSwitch<R> target)
```
    Description copied from class: Change
    
    Apply visitor pattern. Invokes the method of target corresponding to this instance's type.
    
    Specified by:
    
    visit in class Change<T>
    
    Type Parameters:
    R - visitor return type
    Parameters:
    target - visitor pattern target
    
    Returns:
    value returned by the selected method of target
  - apply
```
public void apply(JTransaction jtx,
         JObject jobj)
```
    Description copied from class: Change
    
    Apply this change to the given object in the given transaction.
    
    Specified by:
    
    apply in class Change<T>
    
    Parameters:
    jtx - the transaction in which to apply this change
    jobj - the target object to which to apply this change
  - getOldValue
```
public V getOldValue()
```
    Get the value of the field before the change.
    
    Returns:
    the old field value
  - getNewValue
```
public V getNewValue()
```
    Get the value of the field after the change.
    
    Returns:
    the new field value
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class FieldChange<T>
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class FieldChange<T>
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class SimpleFieldChange<T,V>

Constructor Summary

Method Summary

Methods inherited from class org.jsimpledb.change.FieldChange

Methods inherited from class org.jsimpledb.change.Change

Methods inherited from class java.lang.Object

Constructor Detail

SimpleFieldChange

Method Detail

visit

apply

getOldValue

getNewValue

equals

hashCode

toString