com.goldencode.p2j.persist.orm.schema

Class Difference

java.lang.Object

com.goldencode.p2j.persist.orm.schema.Difference

public class Difference
extends java.lang.Object

Representation of any detected difference. Both old and new element references may be null. The idea is simple: - oldElement NULL, newElement NOT NULL => Added new element - oldElement NOT NULL, newElement NULL => Deleted old element - oldElement NOT NULL, newElement NOT NULL => Element was changed (any other property except name)

Field Summary

Fields

Modifier and Type	Field and Description
private Element	newElement New element reference.
private Element	oldElement Old element reference.
private Table	updatedTable Updated table representation.

Constructor Summary

Constructors

Constructor and Description
Difference(Table updatedTable, Element oldElement, Element newElement) Default constructor.

Method Summary

Modifier and Type	Method and Description
Element	getNewElement() Getter for new element.
Element	getOldElement() Getter for old element.
Table	getUpdatedTable() Getter for updated table.
java.lang.String	toString() For simplicity of debugging, this override implements the logic behind added/removed/modified change states.

Methods inherited from class java.lang.Object

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

Field Detail

updatedTable

private final Table updatedTable

Updated table representation. Should be used as a reference to the updated state.

oldElement

private final Element oldElement

Old element reference. Nullable.

newElement

private final Element newElement

New element reference. Nullable.

Constructor Detail

Difference

public Difference(Table updatedTable,
                  Element oldElement,
                  Element newElement)

Default constructor.

Parameters:

updatedTable - Updated table reference

oldElement - Old element reference

newElement - New element reference

Throws:

java.lang.IllegalArgumentException - if both old and new elements are null

Method Detail

getUpdatedTable

public Table getUpdatedTable()

Getter for updated table.

Returns:

Updated table reference

getOldElement

public Element getOldElement()

Getter for old element.

Returns:

Old element reference

getNewElement

public Element getNewElement()

Getter for new element.

Returns:

New element reference

toString

public java.lang.String toString()

For simplicity of debugging, this override implements the logic behind added/removed/modified change states.

Overrides:

toString in class java.lang.Object