/*****************************************************************
* 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.
****************************************************************/
package org.apache.cayenne.merge;
import java.util.Collections;
import java.util.List;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.dba.QuotingStrategy;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbRelationship;
import org.apache.cayenne.map.DbRelationshipDetected;
public class DropRelationshipToDb extends AbstractToDbToken.Entity {
private DbRelationship rel;
public DropRelationshipToDb(DbEntity entity, DbRelationship rel) {
super(entity);
this.rel = rel;
}
public String getFkName() {
if (rel instanceof DbRelationshipDetected) {
return ((DbRelationshipDetected) rel).getFkName();
}
return null;
}
@Override
public List<String> createSql(DbAdapter adapter) {
String fkName = getFkName();
if (fkName == null) {
return Collections.emptyList();
}
QuotingStrategy context = adapter.getQuotingStrategy();
StringBuilder buf = new StringBuilder();
buf.append("ALTER TABLE ");
buf.append(context.quotedFullyQualifiedName(getEntity()));
buf.append(" DROP CONSTRAINT ");
buf.append(fkName);
return Collections.singletonList(buf.toString());
}
public MergerToken createReverse(MergerFactory factory) {
return factory.createAddRelationshipToModel(getEntity(), rel);
}
public String getTokenName() {
return "Drop Relationship";
}
@Override
public String getTokenValue() {
StringBuilder s = new StringBuilder();
s.append(rel.getSourceEntity().getName());
s.append("->");
s.append(rel.getTargetEntityName());
return s.toString();
}
public DbRelationship getRelationship() {
return rel;
}
}