/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed 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, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.juddi.datastore.jdbc;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Vector;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.juddi.datatype.TModelBag;
import org.apache.juddi.datatype.request.FindQualifiers;
import org.apache.juddi.util.jdbc.DynamicQuery;
/**
* @author Steve Viens (sviens@apache.org)
*/
class FindBusinessByTModelKeyQuery
{
// private reference to the jUDDI logger
private static Log log = LogFactory.getLog(FindBusinessByTModelKeyQuery.class);
static String selectSQL;
static
{
// build selectSQL
StringBuffer sql = new StringBuffer(200);
sql.append("SELECT B.BUSINESS_KEY,B.LAST_UPDATE ");
sql.append("FROM BUSINESS_ENTITY B,BUSINESS_SERVICE S,BINDING_TEMPLATE T,TMODEL_INSTANCE_INFO I ");
selectSQL = sql.toString();
}
/**
* Select ...
*
* @param tModelBag
* @param keysIn
* @param qualifiers
* @param connection JDBC connection
* @throws java.sql.SQLException
*/
public static Vector select(TModelBag tModelBag,Vector keysIn,FindQualifiers qualifiers,Connection connection)
throws java.sql.SQLException
{
// if there is a keysIn vector but it doesn't contain
// any keys then the previous query has exhausted
// all possibilities of a match so skip this call.
if ((keysIn != null) && (keysIn.size() == 0))
return keysIn;
Vector keysOut = new Vector();
PreparedStatement statement = null;
ResultSet resultSet = null;
// construct the SQL statement
DynamicQuery sql = new DynamicQuery(selectSQL);
appendWhere(sql,tModelBag,qualifiers);
appendIn(sql,keysIn);
appendOrderBy(sql,qualifiers);
try
{
log.debug(sql.toString());
statement = sql.buildPreparedStatement(connection);
resultSet = statement.executeQuery();
while (resultSet.next())
keysOut.addElement(resultSet.getString(1));//("BUSINESS_KEY"));
return keysOut;
}
finally
{
try {
resultSet.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BusinessEntity ResultSet: "+e.getMessage(),e);
}
try {
statement.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BusinessEntity Statement: "+e.getMessage(),e);
}
}
}
/**
*
*/
private static void appendWhere(DynamicQuery sql,TModelBag tModelBag,FindQualifiers qualifiers)
{
sql.append("WHERE I.BINDING_KEY = T.BINDING_KEY ");
sql.append("AND T.SERVICE_KEY = S.SERVICE_KEY ");
sql.append("AND S.BUSINESS_KEY = B.BUSINESS_KEY ");
Vector keyVector = tModelBag.getTModelKeyVector();
int vectorSize = keyVector.size();
if (vectorSize > 0)
{
sql.append("AND (");
for (int i=0; i<vectorSize; i++)
{
String key = (String) keyVector.elementAt(i);
sql.append("I.TMODEL_KEY = ? ");
sql.addValue(key);
if (i+1 < vectorSize)
sql.append(" OR ");
}
sql.append(") ");
}
}
/**
* Select ...
*
* @param tModelKey
* @param keysIn
* @param qualifiers
* @param connection JDBC connection
* @throws java.sql.SQLException
*/
public static Vector select(String tModelKey,Vector keysIn,FindQualifiers qualifiers,Connection connection)
throws java.sql.SQLException
{
// if there is a keysIn vector but it doesn't contain
// any keys then the previous query has exhausted
// all possibilities of a match so skip this call.
if ((keysIn != null) && (keysIn.size() == 0))
return keysIn;
Vector keysOut = new Vector();
PreparedStatement statement = null;
ResultSet resultSet = null;
// construct the SQL statement
DynamicQuery sql = new DynamicQuery(selectSQL);
appendWhere(sql,tModelKey,qualifiers);
appendIn(sql,keysIn);
appendOrderBy(sql,qualifiers);
try
{
log.debug(sql.toString());
statement = sql.buildPreparedStatement(connection);
resultSet = statement.executeQuery();
while (resultSet.next())
keysOut.addElement(resultSet.getString(1));//("BUSINESS_KEY"));
return keysOut;
}
finally
{
try {
resultSet.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BusinessEntity ResultSet: "+e.getMessage(),e);
}
try {
statement.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BusinessEntity Statement: "+e.getMessage(),e);
}
}
}
/**
*
*/
private static void appendWhere(DynamicQuery sql,String tModelKey,FindQualifiers qualifiers)
{
sql.append("WHERE I.BINDING_KEY = T.BINDING_KEY ");
sql.append("AND T.SERVICE_KEY = S.SERVICE_KEY ");
sql.append("AND S.BUSINESS_KEY = B.BUSINESS_KEY ");
if ((tModelKey != null) && (tModelKey.trim().length() > 0))
{
sql.append("AND I.TMODEL_KEY = ? ");
sql.addValue(tModelKey);
}
}
/**
* Utility method used to construct SQL "IN" statements such as
* the following SQL example:
*
* SELECT * FROM TABLE WHERE MONTH IN ('jan','feb','mar')
*
* @param sql StringBuffer to append the final results to
* @param keysIn Vector of Strings used to construct the "IN" clause
*/
private static void appendIn(DynamicQuery sql,Vector keysIn)
{
if (keysIn == null)
return;
sql.append("AND B.BUSINESS_KEY IN (");
int keyCount = keysIn.size();
for (int i=0; i<keyCount; i++)
{
String key = (String)keysIn.elementAt(i);
sql.append("?");
sql.addValue(key);
if ((i+1) < keyCount)
sql.append(",");
}
sql.append(") ");
}
/**
*
*/
private static void appendOrderBy(DynamicQuery sql,FindQualifiers qualifiers)
{
sql.append("ORDER BY ");
if (qualifiers == null)
sql.append("B.LAST_UPDATE DESC");
else if (qualifiers.sortByDateAsc)
sql.append("B.LAST_UPDATE ASC");
else
sql.append("B.LAST_UPDATE DESC");
}
}