/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.cmp.jdbc2;
import javax.ejb.FinderException;
import javax.ejb.ObjectNotFoundException;
import org.jboss.as.cmp.jdbc.JDBCEntityPersistenceStore;
import org.jboss.as.cmp.jdbc.JDBCQueryCommand;
import org.jboss.as.cmp.jdbc.JDBCTypeFactory;
import org.jboss.as.cmp.jdbc.QueryParameter;
import org.jboss.as.cmp.jdbc.metadata.JDBCFunctionMappingMetaData;
import org.jboss.as.cmp.jdbc.metadata.JDBCTypeMappingMetaData;
import org.jboss.as.cmp.jdbc2.bridge.JDBCCMPFieldBridge2;
import org.jboss.as.cmp.jdbc2.bridge.JDBCEntityBridge2;
import org.jboss.as.cmp.jdbc2.schema.Schema;
import org.jboss.logging.Logger;
/**
* @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
* @version <tt>$Revision: 81030 $</tt>
*/
public class FindByPrimaryKeyCommand
extends AbstractQueryCommand {
public FindByPrimaryKeyCommand(JDBCEntityBridge2 entity) {
this.entity = entity;
JDBCCMPFieldBridge2[] fields = (JDBCCMPFieldBridge2[]) entity.getTableFields();
String selectColumns = fields[0].getColumnName();
for (int i = 1; i < fields.length; ++i) {
selectColumns += ", " + fields[i].getColumnName();
}
JDBCCMPFieldBridge2[] pkFields = (JDBCCMPFieldBridge2[]) entity.getPrimaryKeyFields();
String whereColumns = pkFields[0].getColumnName() + "=?";
for (int i = 1; i < pkFields.length; ++i) {
whereColumns += " and " + pkFields[i].getColumnName() + "=?";
}
if (entity.getMetaData().hasRowLocking()) {
JDBCEntityPersistenceStore manager = entity.getManager();
JDBCTypeFactory typeFactory = manager.getJDBCTypeFactory();
JDBCTypeMappingMetaData typeMapping = typeFactory.getTypeMapping();
JDBCFunctionMappingMetaData rowLockingTemplate = typeMapping.getRowLockingTemplate();
if (rowLockingTemplate == null) {
throw new RuntimeException("Row locking template is not defined for mapping: " + typeMapping.getName());
}
sql = rowLockingTemplate.getFunctionSql(
new Object[]{selectColumns, entity.getQualifiedTableName(), whereColumns, null}, new StringBuffer()
).toString();
} else {
sql = "select ";
sql += selectColumns;
sql += " from " + entity.getQualifiedTableName() + " where ";
sql += whereColumns;
}
log = Logger.getLogger(getClass().getName() + "." + entity.getEntityName() + "#findByPrimaryKey");
log.debug("sql: " + sql);
setParameters(QueryParameter.createPrimaryKeyParameters(0, entity));
setEntityReader(entity, false);
}
public Object fetchOne(Schema schema, Object[] args, JDBCQueryCommand.EntityProxyFactory factory) throws FinderException {
Object pk = args[0];
if (pk == null) {
throw new IllegalArgumentException("Null argument for findByPrimaryKey");
}
Object instance;
boolean cached = entity.getTable().hasRow(pk);
if (!cached) {
instance = super.executeFetchOne(args, factory);
if (instance == null) {
throw new ObjectNotFoundException("Instance not find: entity=" + entity.getEntityName() + ", pk=" + pk);
}
} else {
instance = pk;
}
return instance;
}
}