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* 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
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package org.apache.cayenne.dba.ingres;
import java.util.Collections;
import java.util.List;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.dba.QuotingStrategy;
import org.apache.cayenne.dba.TypesMapping;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbJoin;
import org.apache.cayenne.map.DbRelationship;
import org.apache.cayenne.merge.AddRelationshipToDb;
import org.apache.cayenne.merge.DropColumnToDb;
import org.apache.cayenne.merge.DropRelationshipToDb;
import org.apache.cayenne.merge.MergerFactory;
import org.apache.cayenne.merge.MergerToken;
import org.apache.cayenne.merge.SetAllowNullToDb;
import org.apache.cayenne.merge.SetColumnTypeToDb;
import org.apache.cayenne.merge.SetNotNullToDb;
public class IngresMergerFactory extends MergerFactory {
@Override
public MergerToken createSetColumnTypeToDb(final DbEntity entity, DbAttribute columnOriginal,
final DbAttribute columnNew) {
return new SetColumnTypeToDb(entity, columnOriginal, columnNew) {
@Override
protected void appendPrefix(StringBuffer sqlBuffer, QuotingStrategy context) {
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quotedFullyQualifiedName(entity));
sqlBuffer.append(" ALTER COLUMN ");
sqlBuffer.append(context.quotedName(columnNew));
sqlBuffer.append(" ");
}
};
}
@Override
public MergerToken createDropColumnToDb(DbEntity entity, DbAttribute column) {
return new DropColumnToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuilder buf = new StringBuilder();
QuotingStrategy context = adapter.getQuotingStrategy();
buf.append("ALTER TABLE ");
buf.append(context.quotedFullyQualifiedName(getEntity()));
buf.append(" DROP COLUMN ");
buf.append(context.quotedName(getColumn()));
buf.append(" RESTRICT ");
return Collections.singletonList(buf.toString());
}
};
}
@Override
public MergerToken createAddRelationshipToDb(DbEntity entity, final DbRelationship rel) {
return new AddRelationshipToDb(entity, rel) {
@Override
public List<String> createSql(DbAdapter adapter) {
if (!rel.isToMany() && rel.isToPK() && !rel.isToDependentPK()) {
DbEntity source = (DbEntity) rel.getSourceEntity();
QuotingStrategy context = adapter.getQuotingStrategy();
StringBuilder buf = new StringBuilder();
StringBuilder refBuf = new StringBuilder();
buf.append("ALTER TABLE ");
buf.append(context.quotedFullyQualifiedName(source));
// requires the ADD CONSTRAINT statement
buf.append(" ADD CONSTRAINT ");
String name = "U_" + rel.getSourceEntity().getName() + "_"
+ (long) (System.currentTimeMillis() / (Math.random() * 100000));
buf.append(context.quotedIdentifier(rel.getSourceEntity(), name));
buf.append(" FOREIGN KEY (");
boolean first = true;
for (DbJoin join : rel.getJoins()) {
if (!first) {
buf.append(", ");
refBuf.append(", ");
} else
first = false;
buf.append(context.quotedSourceName(join));
refBuf.append(context.quotedTargetName(join));
}
buf.append(") REFERENCES ");
buf.append(context.quotedFullyQualifiedName((DbEntity) rel.getTargetEntity()));
buf.append(" (");
buf.append(refBuf.toString());
buf.append(')');
// also make sure we delete dependent FKs
buf.append(" ON DELETE CASCADE");
String fksql = buf.toString();
if (fksql != null) {
return Collections.singletonList(fksql);
}
}
return Collections.emptyList();
}
};
}
@Override
public MergerToken createSetNotNullToDb(DbEntity entity, DbAttribute column) {
return new SetNotNullToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
/*
* TODO: we generate this query as in ingres db documentation,
* but unfortunately ingres don't support it
*/
StringBuilder sqlBuffer = new StringBuilder();
QuotingStrategy context = adapter.getQuotingStrategy();
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(getEntity().getFullyQualifiedName());
sqlBuffer.append(" ALTER COLUMN ");
sqlBuffer.append(context.quotedName(getColumn()));
sqlBuffer.append(" ");
sqlBuffer.append(adapter.externalTypesForJdbcType(getColumn().getType())[0]);
if (TypesMapping.supportsLength(getColumn().getType()) && getColumn().getMaxLength() > 0) {
sqlBuffer.append("(");
sqlBuffer.append(getColumn().getMaxLength());
sqlBuffer.append(")");
}
sqlBuffer.append(" NOT NULL");
return Collections.singletonList(sqlBuffer.toString());
}
};
}
@Override
public MergerToken createSetAllowNullToDb(DbEntity entity, DbAttribute column) {
return new SetAllowNullToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuilder sqlBuffer = new StringBuilder();
QuotingStrategy context = adapter.getQuotingStrategy();
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quotedFullyQualifiedName(getEntity()));
sqlBuffer.append(" ALTER COLUMN ");
sqlBuffer.append(context.quotedName(getColumn()));
sqlBuffer.append(" ");
sqlBuffer.append(adapter.externalTypesForJdbcType(getColumn().getType())[0]);
if (TypesMapping.supportsLength(getColumn().getType()) && getColumn().getMaxLength() > 0) {
sqlBuffer.append("(");
sqlBuffer.append(getColumn().getMaxLength());
sqlBuffer.append(")");
}
sqlBuffer.append(" WITH NULL");
return Collections.singletonList(sqlBuffer.toString());
}
};
}
@Override
public MergerToken createDropRelationshipToDb(final DbEntity entity, DbRelationship rel) {
return new DropRelationshipToDb(entity, rel) {
@Override
public List<String> createSql(DbAdapter adapter) {
String fkName = getFkName();
if (fkName == null) {
return Collections.emptyList();
}
StringBuilder buf = new StringBuilder();
buf.append("ALTER TABLE ");
buf.append(adapter.getQuotingStrategy().quotedFullyQualifiedName(getEntity()));
buf.append(" DROP CONSTRAINT ");
buf.append(fkName);
buf.append(" CASCADE ");
return Collections.singletonList(buf.toString());
}
};
}
}