/*
* 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.CategoryBag;
import org.apache.juddi.datatype.KeyedReference;
import org.apache.juddi.datatype.request.FindQualifiers;
import org.apache.juddi.datatype.tmodel.TModel;
import org.apache.juddi.registry.RegistryEngine;
import org.apache.juddi.util.Config;
import org.apache.juddi.util.jdbc.DynamicQuery;
/**
* @author Steve Viens (sviens@apache.org)
*/
class FindBindingByCategoryQuery
{
// private reference to the jUDDI logger
private static Log log = LogFactory.getLog(FindBindingByCategoryQuery.class);
static String selectSQL;
static String tablePrefix = "";
static
{
tablePrefix = Config.getStringProperty(
RegistryEngine.PROPNAME_TABLE_PREFIX,RegistryEngine.DEFAULT_TABLE_PREFIX);
// build selectSQL
StringBuffer sql = new StringBuffer(200);
sql.append("SELECT B.BINDING_KEY,B.LAST_UPDATE ");
sql.append("FROM ").append(tablePrefix).append("BINDING_TEMPLATE B,").append(tablePrefix).append("BINDING_CATEGORY C ");
selectSQL = sql.toString();
}
/**
* Select ...
*
* @param serviceKey
* @param categoryBag
* @param keysIn
* @param qualifiers
* @param connection JDBC connection
* @throws java.sql.SQLException
*/
public static Vector select(String serviceKey,CategoryBag categoryBag,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;
DynamicQuery sql = new DynamicQuery(selectSQL);
appendWhere(sql,serviceKey,categoryBag,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));//("SERVICE_KEY"));
}
return keysOut;
}
finally
{
try {
resultSet.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BindingTemplate ResultSet: "+e.getMessage(),e);
}
try {
statement.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BindingTemplate Statement: "+e.getMessage(),e);
}
}
}
/**
*
*/
private static void appendWhere(DynamicQuery sql,String serviceKey,CategoryBag categoryBag,FindQualifiers qualifiers)
{
sql.append("WHERE C.BINDING_KEY = B.BINDING_KEY ");
if (serviceKey != null)
{
sql.append("AND B.SERVICE_KEY = ? ");
sql.addValue(serviceKey);
}
if (categoryBag != null)
{
Vector keyedRefVector = categoryBag.getKeyedReferenceVector();
if (keyedRefVector != null)
{
int vectorSize = keyedRefVector.size();
if (vectorSize > 0)
{
sql.append("AND (");
for (int i=0; i<vectorSize; i++)
{
KeyedReference keyedRef = (KeyedReference)keyedRefVector.elementAt(i);
String key = keyedRef.getTModelKey();
String name = keyedRef.getKeyName();
String value = keyedRef.getKeyValue();
if (name == null)
name = "";
if (value == null)
value = "";
// If the tModelKey involved is that of uddi-org:general_keywords,
// the keyNames are identical (DO NOT IGNORE keyName). Otherwise
// keyNames are not significant. Omitted keyNames are treated as
// identical to empty (zero length) keyNames.
//
if (key.equals(TModel.GENERAL_KEYWORDS_TMODEL_KEY))
{
sql.append("(C.TMODEL_KEY_REF = ? AND C.KEY_NAME = ? AND C.KEY_VALUE = ?)");
sql.addValue(key);
sql.addValue(name);
sql.addValue(value);
if (i+1 < vectorSize)
sql.append(" OR ");
}
else
{
sql.append("(C.TMODEL_KEY_REF = ? AND C.KEY_VALUE = ?)");
sql.addValue(key);
sql.addValue(value);
if (i+1 < vectorSize)
sql.append(" OR ");
}
}
sql.append(") ");
}
}
}
}
/**
* Select ...
*
* @param serviceKey
* @param keyedRef
* @param keysIn
* @param qualifiers
* @param connection JDBC connection
* @throws java.sql.SQLException
*/
public static Vector select(String serviceKey,KeyedReference keyedRef,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;
DynamicQuery sql = new DynamicQuery(selectSQL);
appendWhere(sql,serviceKey,keyedRef,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));//("SERVICE_KEY"));
}
return keysOut;
}
finally
{
try {
resultSet.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BindingTemplate ResultSet: "+e.getMessage(),e);
}
try {
statement.close();
}
catch (Exception e)
{
log.warn("An Exception was encountered while attempting to close " +
"the Find BindingTemplate Statement: "+e.getMessage(),e);
}
}
}
/**
*
*/
private static void appendWhere(DynamicQuery sql,String serviceKey,KeyedReference keyedRef,FindQualifiers qualifiers)
{
sql.append("WHERE C.BINDING_KEY = B.BINDING_KEY ");
if (serviceKey != null)
{
sql.append("AND B.SERVICE_KEY = ? ");
sql.addValue(serviceKey);
}
if (keyedRef != null)
{
sql.append("AND (");
String key = keyedRef.getTModelKey();
String name = keyedRef.getKeyName();
String value = keyedRef.getKeyValue();
if (name == null)
name = "";
if (value == null)
value = "";
// If the tModelKey involved is that of uddi-org:general_keywords,
// the keyNames are identical (DO NOT IGNORE keyName). Otherwise
// keyNames are not significant. Omitted keyNames are treated as
// identical to empty (zero length) keyNames.
//
if (key.equals(TModel.GENERAL_KEYWORDS_TMODEL_KEY))
{
sql.append("(C.TMODEL_KEY_REF = ? AND C.KEY_NAME = ? AND C.KEY_VALUE = ?)");
sql.addValue(key);
sql.addValue(name);
sql.addValue(value);
}
else
{
sql.append("(C.TMODEL_KEY_REF = ? AND C.KEY_VALUE = ?)");
sql.addValue(key);
sql.addValue(value);
}
sql.append(") ");
}
}
/**
* 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.BINDING_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");
}
}