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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,
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.dba.sqlite;
import java.util.Calendar;
import java.util.Collection;
import java.util.GregorianCalendar;
import org.apache.cayenne.access.DataNode;
import org.apache.cayenne.access.types.ExtendedTypeMap;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbRelationship;
import org.apache.cayenne.query.Query;
import org.apache.cayenne.query.SQLAction;
/**
* A SQLite database adapter that works with Zentus JDBC driver. See
* http://www.zentus.com/sqlitejdbc/ for the driver information.
*
* Also look at http://www.xerial.org/trac/Xerial/wiki/SQLiteJDBC for another adaptor option.
*
* <pre>
* sqlite.cayenne.adapter = org.apache.cayenne.dba.sqlite.SQLiteAdapter
* sqlite.jdbc.url = jdbc:sqlite:sqlitetest.db
* sqlite.jdbc.driver = org.sqlite.JDBC
* </pre>
*
* @since 3.0
*/
// check http://cwiki.apache.org/CAY/sqliteadapter.html for current limitations.
public class SQLiteAdapter extends JdbcAdapter {
public SQLiteAdapter() {
this.setSupportsUniqueConstraints(false);
this.setSupportsGeneratedKeys(true);
}
@Override
protected void configureExtendedTypes(ExtendedTypeMap map) {
super.configureExtendedTypes(map);
map.registerType(new SQLiteDateType());
map.registerType(new SQLiteBigDecimalType());
map.registerType(new SQLiteFloatType());
map.registerType(new SQLiteByteArrayType());
map.registerType(new SQLiteCalendarType(GregorianCalendar.class));
map.registerType(new SQLiteCalendarType(Calendar.class));
}
@Override
public String createFkConstraint(DbRelationship rel) {
return null;
}
@Override
public String createUniqueConstraint(DbEntity source, Collection<DbAttribute> columns) {
// TODO: andrus 10/9/2007 - only ALTER TABLE ADD CONSTRAINT is not supported,
// presumably there's some other syntax (a part of CREATE TABLE?) that would
// create a unique constraint.
return null;
}
@Override
public SQLAction getAction(Query query, DataNode node) {
return query.createSQLAction(new SQLiteActionBuilder(this, node
.getEntityResolver()));
}
/**
* Appends AUTOINCREMENT clause to the column definition for generated columns.
*/
@Override
public void createTableAppendColumn(StringBuffer sqlBuffer, DbAttribute column) {
super.createTableAppendColumn(sqlBuffer, column);
DbEntity entity = (DbEntity) column.getEntity();
if (column.isGenerated()
&& column.isPrimaryKey()
&& entity.getPrimaryKeys().size() == 1) {
sqlBuffer.append(" PRIMARY KEY AUTOINCREMENT");
}
}
@Override
protected void createTableAppendPKClause(StringBuffer sqlBuffer, DbEntity entity) {
// do not append " PRIMARY KEY () " for single column generated primary key
if (entity.getPrimaryKeys().size() == 1) {
DbAttribute column = entity.getPrimaryKeys().iterator().next();
if (column.isGenerated()) {
return;
}
}
super.createTableAppendPKClause(sqlBuffer, entity);
}
}