| 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 java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.ddlutils.model.Database; |
| import org.apache.ddlutils.model.ForeignKey; |
| import org.apache.ddlutils.model.Reference; |
| import org.apache.ddlutils.model.Table; |
| |
| /** |
| * The base class for changes affecting foreign keys. |
| * |
| * @version $Revision: $ |
| */ |
| public abstract class ForeignKeyChangeImplBase extends TableChangeImplBase |
| implements ForeignKeyChange |
| { |
| /** List of pairs of local and corresponding foreign column names that make up the foreign key. */ |
| private List _referenceColumnNames = new ArrayList(); |
| |
| /** |
| * Creates a new change object. |
| * |
| * @param tableName The name of the table that owns the foreign key |
| * @param foreignKey The foreign key; note that this change object will not maintain a reference |
| * to the foreign key object |
| */ |
| public ForeignKeyChangeImplBase(String tableName, ForeignKey foreignKey) |
| { |
| super(tableName); |
| for (int refIdx = 0; refIdx < foreignKey.getReferenceCount(); refIdx++) |
| { |
| Reference ref = foreignKey.getReference(refIdx); |
| |
| _referenceColumnNames.add(new Pair(ref.getLocalColumnName(), ref.getForeignColumnName())); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public ForeignKey findChangedForeignKey(Database model, boolean caseSensitive) |
| { |
| Table table = findChangedTable(model, caseSensitive); |
| |
| if (table != null) |
| { |
| for (int fkIdx = 0; fkIdx < table.getForeignKeyCount(); fkIdx++) |
| { |
| ForeignKey curFk = table.getForeignKey(fkIdx); |
| |
| if (curFk.getReferenceCount() == _referenceColumnNames.size()) |
| { |
| for (int refIdx = 0; refIdx < curFk.getReferenceCount(); refIdx++) |
| { |
| Reference ref = curFk.getReference(refIdx); |
| Pair colNames = (Pair)_referenceColumnNames.get(refIdx); |
| |
| if (caseSensitive) |
| { |
| if (ref.getLocalColumnName().equals((String)colNames.getFirst()) && |
| ref.getForeignColumnName().equals((String)colNames.getSecond())) |
| { |
| return curFk; |
| } |
| } |
| else |
| { |
| if (ref.getLocalColumnName().equalsIgnoreCase((String)colNames.getFirst()) && |
| ref.getForeignColumnName().equalsIgnoreCase((String)colNames.getSecond())) |
| { |
| return curFk; |
| } |
| } |
| } |
| } |
| } |
| } |
| return null; |
| } |
| } |