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Cayenne Object Persistence Framework
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* Licensed to the Apache Software Foundation (ASF) under one
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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
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*
* http://www.apache.org/licenses/LICENSE-2.0
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* 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.frontbase;
import java.sql.Types;
import java.util.Iterator;
import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.access.DataNode;
import org.apache.cayenne.access.types.ExtendedTypeMap;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.dba.PkGenerator;
import org.apache.cayenne.dba.TypesMapping;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DerivedDbEntity;
import org.apache.cayenne.query.Query;
import org.apache.cayenne.query.SQLAction;
/**
* DbAdapter implementation for FrontBase RDBMS.
* Sample connection settings to
* use with FrontBase are shown below:
*
*
* fb.cayenne.adapter = org.apache.cayenne.dba.frontbase.FrontBaseAdapter
* fb.jdbc.username = _system
* fb.jdbc.password = secret
* fb.jdbc.url = jdbc:FrontBase://localhost/cayenne/
* fb.jdbc.driver = jdbc.FrontBase.FBJDriver
*
*
* @since 1.2
* @author Andrus Adamchik
*/
// TODO, Andrus 11/8/2005:
// Limitations (also see FrontBaseStackAdapter in unit tests):
//
// 1. Case insensitive ordering (i.e. UPPER in the ORDER BY clause) is supported by
// FrontBase, however aliases don't work ( ORDER BY UPPER(t0.ARTIST_NAME)) ... not sure
// what to do about it.
public class FrontBaseAdapter extends JdbcAdapter {
public FrontBaseAdapter() {
setSupportsBatchUpdates(true);
}
/**
* Uses special action builder to create the right action.
*/
public SQLAction getAction(Query query, DataNode node) {
return query.createSQLAction(new FrontBaseActionBuilder(this, node
.getEntityResolver()));
}
public String tableTypeForTable() {
return "BASE TABLE";
}
protected void configureExtendedTypes(ExtendedTypeMap map) {
super.configureExtendedTypes(map);
map.registerType(new FrontBaseByteArrayType());
map.registerType(new FrontBaseBooleanType());
map.registerType(new FrontBaseCharType());
}
/**
* Customizes table creating procedure for FrontBase.
*/
public String createTable(DbEntity ent) {
// later we may support view creation
// for derived DbEntities
if (ent instanceof DerivedDbEntity) {
throw new CayenneRuntimeException("Can't create table for derived DbEntity '"
+ ent.getName()
+ "'.");
}
StringBuffer buf = new StringBuffer();
buf.append("CREATE TABLE ").append(ent.getFullyQualifiedName()).append(" (");
// columns
Iterator it = ent.getAttributes().iterator();
boolean first = true;
while (it.hasNext()) {
if (first) {
first = false;
}
else {
buf.append(", ");
}
DbAttribute at = (DbAttribute) it.next();
// attribute may not be fully valid, do a simple check
if (at.getType() == TypesMapping.NOT_DEFINED) {
throw new CayenneRuntimeException("Undefined type for attribute '"
+ ent.getFullyQualifiedName()
+ "."
+ at.getName()
+ "'.");
}
String[] types = externalTypesForJdbcType(at.getType());
if (types == null || types.length == 0) {
throw new CayenneRuntimeException("Undefined type for attribute '"
+ ent.getFullyQualifiedName()
+ "."
+ at.getName()
+ "': "
+ at.getType());
}
String type = types[0];
buf.append(at.getName()).append(' ').append(type);
// Mapping LONGVARCHAR without length creates a column with lenght "1" which
// is defintely not what we want...so just use something very large (1Gb seems
// to be the limit for FB)
if (at.getType() == Types.LONGVARCHAR) {
int len = at.getMaxLength() > 0 ? at.getMaxLength() : 1073741824;
buf.append("(" + len + ")");
}
else if (at.getType() == Types.VARBINARY || at.getType() == Types.BINARY) {
// use a BIT column with size * 8
int len = at.getMaxLength() > 0 ? at.getMaxLength() : 1073741824;
len *= 8;
buf.append("(" + len + ")");
}
else if (TypesMapping.supportsLength(at.getType())) {
int len = at.getMaxLength();
int prec = TypesMapping.isDecimal(at.getType()) ? at.getPrecision() : -1;
// sanity check
if (prec > len) {
prec = -1;
}
if (len > 0) {
buf.append('(').append(len);
if (prec >= 0) {
buf.append(", ").append(prec);
}
buf.append(')');
}
}
if (at.isMandatory()) {
buf.append(" NOT NULL");
}
// else: don't appen NULL for FrontBase:
}
// primary key clause
Iterator pkit = ent.getPrimaryKey().iterator();
if (pkit.hasNext()) {
if (first)
first = false;
else
buf.append(", ");
buf.append("PRIMARY KEY (");
boolean firstPk = true;
while (pkit.hasNext()) {
if (firstPk)
firstPk = false;
else
buf.append(", ");
DbAttribute at = (DbAttribute) pkit.next();
buf.append(at.getName());
}
buf.append(')');
}
buf.append(')');
return buf.toString();
}
/**
* Adds the CASCADE option to the DROP TABLE clause.
*/
public String dropTable(DbEntity ent) {
return super.dropTable(ent) + " CASCADE";
}
protected PkGenerator createPkGenerator() {
return new FrontBasePkGenerator();
}
}
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