package org.apache.ddlutils.alteration; | |
/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
import org.apache.ddlutils.DdlUtilsException; | |
import org.apache.ddlutils.model.Column; | |
import org.apache.ddlutils.model.Database; | |
import org.apache.ddlutils.model.Table; | |
/** | |
* Represents the addition of a column to a table. | |
* | |
* @version $Revision: $ | |
*/ | |
public class AddColumnChange extends TableChangeImplBase | |
{ | |
/** The new column. */ | |
private Column _newColumn; | |
/** The column after which the new column should be added. */ | |
private Column _previousColumn; | |
/** The column before which the new column should be added. */ | |
private Column _nextColumn; | |
/** Whether the column is added at the end. */ | |
private boolean _atEnd; | |
/** | |
* Creates a new change object. | |
* | |
* @param table The table to add the column to | |
* @param newColumn The new column | |
* @param previousColumn The column after which the new column should be added | |
* @param nextColumn The column before which the new column should be added | |
*/ | |
public AddColumnChange(Table table, Column newColumn, Column previousColumn, Column nextColumn) | |
{ | |
super(table); | |
_newColumn = newColumn; | |
_previousColumn = previousColumn; | |
_nextColumn = nextColumn; | |
} | |
/** | |
* Returns the new column. | |
* | |
* @return The new column | |
*/ | |
public Column getNewColumn() | |
{ | |
return _newColumn; | |
} | |
/** | |
* Returns the column after which the new column should be added. | |
* | |
* @return The previous column | |
*/ | |
public Column getPreviousColumn() | |
{ | |
return _previousColumn; | |
} | |
/** | |
* Returns the column before which the new column should be added. | |
* | |
* @return The next column | |
*/ | |
public Column getNextColumn() | |
{ | |
return _nextColumn; | |
} | |
/** | |
* Determines whether the column is added at the end (when applied in the order | |
* of creation of the changes). | |
* | |
* @return <code>true</code> if the column is added at the end | |
*/ | |
public boolean isAtEnd() | |
{ | |
return _atEnd; | |
} | |
/** | |
* Specifies whether the column is added at the end (when applied in the order | |
* of creation of the changes). | |
* | |
* @param atEnd <code>true</code> if the column is added at the end | |
*/ | |
public void setAtEnd(boolean atEnd) | |
{ | |
_atEnd = atEnd; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
public void apply(Database database, boolean caseSensitive) | |
{ | |
Column newColumn = null; | |
try | |
{ | |
newColumn = (Column)_newColumn.clone(); | |
} | |
catch (CloneNotSupportedException ex) | |
{ | |
throw new DdlUtilsException(ex); | |
} | |
Table table = database.findTable(getChangedTable().getName(), caseSensitive); | |
if ((_previousColumn != null) && (_nextColumn != null)) | |
{ | |
int idx = table.getColumnIndex(_previousColumn) + 1; | |
table.addColumn(idx, newColumn); | |
} | |
else | |
{ | |
table.addColumn(newColumn); | |
} | |
} | |
} |