/*
* Copyright 2004 Clinton Begin
*
* 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 com.ibatis.sqlmap.engine.mapping.statement;
import com.ibatis.sqlmap.client.event.RowHandler;
import com.ibatis.sqlmap.engine.cache.CacheKey;
import com.ibatis.sqlmap.engine.cache.CacheModel;
import com.ibatis.sqlmap.engine.mapping.parameter.ParameterMap;
import com.ibatis.sqlmap.engine.mapping.result.ResultMap;
import com.ibatis.sqlmap.engine.mapping.sql.Sql;
import com.ibatis.sqlmap.engine.scope.RequestScope;
import com.ibatis.sqlmap.engine.transaction.Transaction;
import java.sql.SQLException;
import java.util.List;
public class CachingStatement implements MappedStatement {
private MappedStatement statement;
private CacheModel cacheModel;
public CachingStatement(MappedStatement statement, CacheModel cacheModel) {
this.statement = statement;
this.cacheModel = cacheModel;
}
public String getId() {
return statement.getId();
}
public StatementType getStatementType() {
return statement.getStatementType();
}
public Integer getResultSetType() {
return statement.getResultSetType();
}
public Integer getFetchSize() {
return statement.getFetchSize();
}
public ParameterMap getParameterMap() {
return statement.getParameterMap();
}
public ResultMap getResultMap() {
return statement.getResultMap();
}
public int executeUpdate(RequestScope request, Transaction trans, Object parameterObject)
throws SQLException {
int n = statement.executeUpdate(request, trans, parameterObject);
return n;
}
public Object executeQueryForObject(RequestScope request, Transaction trans, Object parameterObject, Object resultObject)
throws SQLException {
CacheKey cacheKey = getCacheKey(request, parameterObject);
cacheKey.update("executeQueryForObject");
Object object = cacheModel.getObject(cacheKey);
if (object == CacheModel.NULL_OBJECT){
// This was cached, but null
object = null;
}else if (object == null) {
object = statement.executeQueryForObject(request, trans, parameterObject, resultObject);
cacheModel.putObject(cacheKey, object);
}
return object;
}
public List executeQueryForList(RequestScope request, Transaction trans, Object parameterObject, int skipResults, int maxResults)
throws SQLException {
CacheKey cacheKey = getCacheKey(request, parameterObject);
cacheKey.update("executeQueryForList");
cacheKey.update(skipResults);
cacheKey.update(maxResults);
Object listAsObject = cacheModel.getObject(cacheKey);
List list;
if(listAsObject == CacheModel.NULL_OBJECT){
// The cached object was null
list = null;
}else if (listAsObject == null) {
list = statement.executeQueryForList(request, trans, parameterObject, skipResults, maxResults);
cacheModel.putObject(cacheKey, list);
}else{
list = (List) listAsObject;
}
return list;
}
public void executeQueryWithRowHandler(RequestScope request, Transaction trans, Object parameterObject, RowHandler rowHandler)
throws SQLException {
statement.executeQueryWithRowHandler(request, trans, parameterObject, rowHandler);
}
public CacheKey getCacheKey(RequestScope request, Object parameterObject) {
CacheKey key = statement.getCacheKey(request, parameterObject);
if (!cacheModel.isReadOnly() && !cacheModel.isSerialize()) {
key.update(request.getSession());
}
return key;
}
public void setBaseCacheKey(int base) {
statement.setBaseCacheKey(base);
}
public void addExecuteListener(ExecuteListener listener) {
statement.addExecuteListener(listener);
}
public void notifyListeners() {
statement.notifyListeners();
}
public void initRequest(RequestScope request) {
statement.initRequest(request);
}
public Sql getSql() {
return statement.getSql();
}
public Class getParameterClass() {
return statement.getParameterClass();
}
public Integer getTimeout() {
return statement.getTimeout();
}
public boolean hasMultipleResultMaps() {
return statement.hasMultipleResultMaps();
}
public ResultMap[] getAdditionalResultMaps() {
return statement.getAdditionalResultMaps();
}
}