ChangeEvent (biojava-legacy 1.9.5 API)

java.lang.Object
- java.util.EventObject
- - org.biojava.utils.ChangeEvent

All Implemented Interfaces:

Serializable
```
public class ChangeEvent
extends EventObject
```
Event which encapsulates a change in any mutable BioJava object.

Since:

1.1

Author:

Thomas Down, Matthew Pocock, Greg Cox

See Also:

Serialized Form

Field Summary
- Fields inherited from class java.util.EventObject
  source

Constructor Summary

Constructors
Constructor	Description
`ChangeEvent(Object source, ChangeType type)`	Construct a ChangeEvent with no change details.
`ChangeEvent(Object source, ChangeType type, Object change)`	Construct a ChangeEvent specifying a new value for a property, or an object to be added to a collection.
`ChangeEvent(Object source, ChangeType type, Object change, Object previous)`	Construct a ChangeEvent specifying a new value for a property, and giving the previous value.
`ChangeEvent(Object source, ChangeType type, Object change, Object previous, ChangeEvent chain)`	Construct a ChangeEvent to be fired because another ChangeEvent has been received from a property object.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ChangeEvent`	`getChainedEvent()`	Return the event which caused this to be fired, or `null` if this change was not caused by another event.
`Object`	`getChange()`	Return an object which is to be the new value of some property, or is to be added to a collection.
`Object`	`getPrevious()`	Return the old value of a property being changed.
`ChangeType`	`getType()`	Find the type of this event.
`String`	`toString()`

Methods inherited from class java.util.EventObject
getSource

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

- Constructor Detail
  - ChangeEvent
```
public ChangeEvent(Object source,
                   ChangeType type)
```
    Construct a ChangeEvent with no change details.
    
    Parameters:
    
    source - The object being changed.
    
    type - The type of change being made.
  - ChangeEvent
```
public ChangeEvent(Object source,
                   ChangeType type,
                   Object change)
```
    Construct a ChangeEvent specifying a new value for a property, or an object to be added to a collection.
    
    Parameters:
    
    source - The object being changed.
    
    type - The type of change being made.
    
    change - The new value of the property being changed.
  - ChangeEvent
```
public ChangeEvent(Object source,
                   ChangeType type,
                   Object change,
                   Object previous)
```
    Construct a ChangeEvent specifying a new value for a property, and giving the previous value.
    
    Parameters:
    
    source - The object being changed.
    
    type - The type of change being made.
    
    change - The new value of the property being changed.
    
    previous - The old value of the property being changed.
  - ChangeEvent
```
public ChangeEvent(Object source,
                   ChangeType type,
                   Object change,
                   Object previous,
                   ChangeEvent chain)
```
    Construct a ChangeEvent to be fired because another ChangeEvent has been received from a property object.
    
    Parameters:
    
    source - The object being changed.
    
    type - The type of change being made.
    
    change - The new value of the property being changed.
    
    previous - The old value of the property being changed.
    
    chain - The event which caused this event to be fired.
- Method Detail
  - getType
```
public ChangeType getType()
```
    Find the type of this event.
    
    Returns:
    
    The Type value
  - getChange
```
public Object getChange()
```
    Return an object which is to be the new value of some property, or is to be added to a collection. May return null is this is not meaningful.
    
    Returns:
    
    The Change value
  - getPrevious
```
public Object getPrevious()
```
    Return the old value of a property being changed. May return null is this is not meaningful.
    
    Returns:
    
    The Previous value
  - getChainedEvent
```
public ChangeEvent getChainedEvent()
```
    Return the event which caused this to be fired, or null if this change was not caused by another event.
    
    Returns:
    
    The ChainedEvent value
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class EventObject

Field Summary

Fields inherited from class java.util.EventObject

Constructor Summary

Method Summary

Methods inherited from class java.util.EventObject

Methods inherited from class java.lang.Object

Constructor Detail

ChangeEvent

ChangeEvent

ChangeEvent

ChangeEvent

Method Detail

getType

getChange

getPrevious

getChainedEvent

toString