org.objectstyle.cayenne.dba.hsqldb.HSQLDBAdapter Maven / Gradle / Ivy
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*
* 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
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* the documentation and/or other materials provided with the
* distribution.
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* 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.
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* "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
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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-hsqldb.cayenne.adapter = org.objectstyle.cayenne.dba.hsqldb.HSQLDBAdapter
* test-hsqldb.jdbc.username = test
* test-hsqldb.jdbc.password = secret
* test-hsqldb.jdbc.url = jdbc:hsqldb:hsql://serverhostname
* test-hsqldb.jdbc.driver = org.hsqldb.jdbcDriver
*
*
*
* @author Holger Hoffstaette
*/
public class HSQLDBAdapter extends JdbcAdapter {
protected void configureExtendedTypes(ExtendedTypeMap map) {
super.configureExtendedTypes(map);
map.registerType(new ShortType());
map.registerType(new ByteType());
}
/**
* Generate fully-qualified name for 1.8 and on. Subclass generates unqualified name.
*
* @since 1.2
*/
protected String getTableName(DbEntity entity) {
return entity.getFullyQualifiedName();
}
/**
* Generate fully-qualified name for 1.8 and on. Subclass generates unqualified name.
*
* @since 1.2
*/
protected String getSchemaName(DbEntity entity) {
if (entity.getSchema() != null && entity.getSchema().length() > 0) {
return entity.getSchema() + ".";
}
return "";
}
/**
* Uses special action builder to create the right action.
*
* @since 1.2
*/
public SQLAction getAction(Query query, DataNode node) {
return query
.createSQLAction(new HSQLActionBuilder(this, node.getEntityResolver()));
}
/**
* Returns a DDL string to create a unique constraint over a set of columns.
*
* @since 1.1
*/
public String createUniqueConstraint(DbEntity source, Collection columns) {
if (columns == null || columns.isEmpty()) {
throw new CayenneRuntimeException(
"Can't create UNIQUE constraint - no columns specified.");
}
String srcName = getTableName(source);
StringBuffer buf = new StringBuffer();
buf.append("ALTER TABLE ").append(srcName);
buf.append(" ADD CONSTRAINT ");
buf.append(getSchemaName(source));
buf.append("U_");
buf.append(source.getName());
buf.append("_");
buf.append((long) (System.currentTimeMillis() / (Math.random() * 100000)));
buf.append(" UNIQUE (");
Iterator it = columns.iterator();
DbAttribute first = (DbAttribute) it.next();
buf.append(first.getName());
while (it.hasNext()) {
DbAttribute next = (DbAttribute) it.next();
buf.append(", ");
buf.append(next.getName());
}
buf.append(")");
return buf.toString();
}
/**
* Adds an ADD CONSTRAINT clause to a relationship constraint.
*
* @see JdbcAdapter#createFkConstraint(DbRelationship)
*/
public String createFkConstraint(DbRelationship rel) {
StringBuffer buf = new StringBuffer();
StringBuffer refBuf = new StringBuffer();
String srcName = getTableName((DbEntity) rel.getSourceEntity());
String dstName = getTableName((DbEntity) rel.getTargetEntity());
buf.append("ALTER TABLE ");
buf.append(srcName);
// hsqldb requires the ADD CONSTRAINT statement
buf.append(" ADD CONSTRAINT ");
buf.append(getSchemaName((DbEntity) rel.getSourceEntity()));
buf.append("C_");
buf.append(rel.getSourceEntity().getName());
buf.append("_");
buf.append((long) (System.currentTimeMillis() / (Math.random() * 100000)));
buf.append(" FOREIGN KEY (");
Iterator jit = rel.getJoins().iterator();
boolean first = true;
while (jit.hasNext()) {
DbJoin join = (DbJoin) jit.next();
if (!first) {
buf.append(", ");
refBuf.append(", ");
}
else
first = false;
buf.append(join.getSourceName());
refBuf.append(join.getTargetName());
}
buf.append(") REFERENCES ");
buf.append(dstName);
buf.append(" (");
buf.append(refBuf.toString());
buf.append(')');
// also make sure we delete dependent FKs
buf.append(" ON DELETE CASCADE");
return buf.toString();
}
/**
* Uses "CREATE CACHED TABLE" instead of "CREATE TABLE".
*
* @since 1.2
*/
public String createTable(DbEntity ent) {
// SET SCHEMA
String sql = super.createTable(ent);
if (sql != null && sql.toUpperCase().startsWith("CREATE TABLE ")) {
sql = "CREATE CACHED TABLE " + sql.substring("CREATE TABLE ".length());
}
return sql;
}
final class ShortType extends DefaultType {
ShortType() {
super(Short.class.getName());
}
public void setJdbcObject(
PreparedStatement st,
Object val,
int pos,
int type,
int precision) throws Exception {
if (val == null) {
super.setJdbcObject(st, val, pos, type, precision);
}
else {
short s = ((Number) val).shortValue();
st.setShort(pos, s);
}
}
}
final class ByteType extends DefaultType {
ByteType() {
super(Byte.class.getName());
}
public void setJdbcObject(
PreparedStatement st,
Object val,
int pos,
int type,
int precision) throws Exception {
if (val == null) {
super.setJdbcObject(st, val, pos, type, precision);
}
else {
byte b = ((Number) val).byteValue();
st.setByte(pos, b);
}
}
}
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