org.objectstyle.cayenne.dba.db2.DB2Adapter Maven / Gradle / Ivy
/* ====================================================================
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
*
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if any,
* must include the following acknowlegement:
* "This product includes software developed by independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, email
* "andrus at objectstyle dot org".
*
* 5. Products derived from this software may not be called "ObjectStyle"
* or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
* names without prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
*
*
* test-db2.cayenne.adapter = org.objectstyle.cayenne.dba.db2.DB2Adapter
* test-db2.jdbc.username = test
* test-db2.jdbc.password = secret
* test-db2.jdbc.url = jdbc:db2://servername:50000/databasename
* test-db2.jdbc.driver = com.ibm.db2.jcc.DB2Driver
*
*
*
* @author Holger Hoffstaette
*/
public class DB2Adapter extends JdbcAdapter {
/**
* Uses DB2ActionBuilder to create the right action.
*
* @since 1.2
*/
public SQLAction getAction(Query query, DataNode node) {
return query.createSQLAction(new DB2ActionBuilder(this, node.getEntityResolver()));
}
/**
* Creates a DB2 specific PK Generator.
*/
protected PkGenerator createPkGenerator() {
return new DB2PkGenerator();
}
protected void configureExtendedTypes(ExtendedTypeMap map) {
super.configureExtendedTypes(map);
// create specially configured CharType handler
map.registerType(new CharType(true, true));
// configure boolean type to work with numeric columns
map.registerType(new DB2BooleanType());
map.registerType(new ByteArrayType(false, false));
}
/**
* Returns a SQL string that can be used to create database table corresponding to
* ent parameter.
*/
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);
// append size and precision (if applicable)
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");
}
}
// 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();
}
/**
* Returns a trimming translator.
*/
public QualifierTranslator getQualifierTranslator(QueryAssembler queryAssembler) {
return new DB2QualifierTranslator(queryAssembler, "RTRIM");
}
final class DB2BooleanType extends BooleanType {
public void setJdbcObject(
PreparedStatement st,
Object val,
int pos,
int type,
int precision) throws Exception {
if (val != null) {
st.setInt(pos, ((Boolean) val).booleanValue() ? 1 : 0);
}
else {
st.setNull(pos, type);
}
}
}
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