org.apache.ddlutils.alteration

Class ModelComparator

java.lang.Object

org.apache.ddlutils.alteration.ModelComparator

public class ModelComparator
extends Object

Compares two database models and creates change objects that express how to adapt the first model so that it becomes the second one. Neither of the models are changed in the process, however, it is also assumed that the models do not change in between. TODO: Add support and tests for the change of the column order

Version:

$Revision: $

Constructor Summary

Constructors

Constructor and Description
ModelComparator(PlatformInfo platformInfo, boolean caseSensitive) Creates a new model comparator object.

Method Summary

Methods

Modifier and Type	Method and Description
List	compare(Database sourceModel, Database targetModel) Compares the two models and returns the changes necessary to create the second model from the first one.
List	compareColumns(Table sourceTable, Column sourceColumn, Table targetTable, Column targetColumn) Compares the two columns and returns the changes necessary to create the second column from the first one.
List	compareTables(Database sourceModel, Table sourceTable, Database targetModel, Table targetTable) Compares the two tables and returns the changes necessary to create the second table from the first one.

Methods inherited from class java.lang.Object

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

Constructor Detail

ModelComparator

public ModelComparator(PlatformInfo platformInfo,
               boolean caseSensitive)

Creates a new model comparator object.

Parameters:

platformInfo - The platform info

caseSensitive - Whether comparison is case sensitive

Method Detail

compare

public List compare(Database sourceModel,
           Database targetModel)

Compares the two models and returns the changes necessary to create the second model from the first one.

Parameters:

sourceModel - The source model

targetModel - The target model

Returns:

The changes

compareTables

public List compareTables(Database sourceModel,
                 Table sourceTable,
                 Database targetModel,
                 Table targetTable)

Compares the two tables and returns the changes necessary to create the second table from the first one.

Parameters:

sourceModel - The source model which contains the source table

sourceTable - The source table

targetModel - The target model which contains the target table

targetTable - The target table

Returns:

The changes

compareColumns

public List compareColumns(Table sourceTable,
                  Column sourceColumn,
                  Table targetTable,
                  Column targetColumn)

Compares the two columns and returns the changes necessary to create the second column from the first one.

Parameters:

sourceTable - The source table which contains the source column

sourceColumn - The source column

targetTable - The target table which contains the target column

targetColumn - The target column

Returns:

The changes