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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.tuscany.das.rdb.graphbuilder.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import commonj.sdo.DataObject;
/**
*
* Used to store and look up table objects based on primary key This could be a lot more
* efficient if we could use LinkedHashMap from JDK 1.4
*/
public class MultiTableRegistry implements TableRegistry {
private final Logger logger = Logger.getLogger(MultiTableRegistry.class);
private Map tableNameMap;
private Map tableValueMap;
public MultiTableRegistry() {
tableNameMap = new HashMap();
tableValueMap = new HashMap();
}
/**
* Get the table with the specified name and primary key
*
* @param tableName
* @param primaryKey
* @return EDataObject
*/
public DataObject get(String tableName, List primaryKey) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Looking for table " + tableName + " with PK " + primaryKey);
this.logger.debug("\tReturning " + getPkMap(tableName).get(primaryKey));
}
return (DataObject) getPkMap(tableName).get(primaryKey);
}
/**
* Add the table with the specified name and primary key
*
* @param tableName
* @param primaryKey
* @param value
*/
public void put(String tableName, List primaryKey, DataObject value) {
if (getPkMap(tableName).put(primaryKey, value) == null) {
getCreateValueList(tableName).add(value);
}
}
/**
* Get the HashMap that contains the primary key to table object mappings.
*
* @param tableName
* @return HashMap
*/
private Map getPkMap(String tableName) {
Map pkMap = (HashMap) tableNameMap.get(tableName);
if (pkMap == null) {
pkMap = new HashMap();
tableNameMap.put(tableName, pkMap);
}
return pkMap;
}
private List getCreateValueList(String tableName) {
List values = (List) tableValueMap.get(tableName);
if (values == null) {
values = new ArrayList();
tableValueMap.put(tableName, values);
}
return values;
}
public boolean contains(String tableName, List primaryKey) {
return get(tableName, primaryKey) == null ? false : true;
}
}
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