Package liquibase.diff.compare.core

Class PrimaryKeyComparator

java.lang.Object

liquibase.diff.compare.core.PrimaryKeyComparator

All Implemented Interfaces:

DatabaseObjectComparator

public class PrimaryKeyComparator
extends Object
implements DatabaseObjectComparator

Field Summary

Fields inherited from interface liquibase.diff.compare.DatabaseObjectComparator

PRIORITY_DATABASE, PRIORITY_DEFAULT, PRIORITY_NONE, PRIORITY_TYPE

Constructor Summary

Constructors

Constructor	Description
PrimaryKeyComparator()

Method Summary

Modifier and Type	Method	Description
ObjectDifferences	findDifferences(DatabaseObject databaseObject1, DatabaseObject databaseObject2, Database accordingTo, CompareControl compareControl, DatabaseObjectComparatorChain chain, Set<String> exclude)
int	getPriority(Class<? extends DatabaseObject> objectType, Database database)
String[]	hash(DatabaseObject databaseObject, Database accordingTo, DatabaseObjectComparatorChain chain)
boolean	isSameObject(DatabaseObject databaseObject1, DatabaseObject databaseObject2, Database accordingTo, DatabaseObjectComparatorChain chain)	Two primary keys are the same object when they belong to the same table and their names match, where a null name matches any PK on the table.

Methods inherited from class java.lang.Object

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

Constructor Details

PrimaryKeyComparator

public PrimaryKeyComparator()

Method Details

getPriority

public int getPriority(Class<? extends DatabaseObject> objectType,
 Database database)

Specified by:

getPriority in interface DatabaseObjectComparator

hash

public String[] hash(DatabaseObject databaseObject,
 Database accordingTo,
 DatabaseObjectComparatorChain chain)

Specified by:

hash in interface DatabaseObjectComparator

isSameObject

public boolean isSameObject(DatabaseObject databaseObject1,
 DatabaseObject databaseObject2,
 Database accordingTo,
 DatabaseObjectComparatorChain chain)

Two primary keys are the same object when they belong to the same table and their names match, where a null name matches any PK on the table. Differing names still match when both sides carry column definitions (snapshotted objects), since a table has a single PK and auto-generated names vary across environments. A side without columns is a name-based lookup example (e.g. the primaryKeyExists precondition) and must match by name.

Specified by:

isSameObject in interface DatabaseObjectComparator

findDifferences

public ObjectDifferences findDifferences(DatabaseObject databaseObject1,
 DatabaseObject databaseObject2,
 Database accordingTo,
 CompareControl compareControl,
 DatabaseObjectComparatorChain chain,
 Set<String> exclude)

Specified by:

findDifferences in interface DatabaseObjectComparator