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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.tuscany.das.rdb.graphbuilder.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.tuscany.das.rdb.util.DebugUtil;
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 HashMap tableNameMap;
private HashMap tableValueMap;
private boolean debug = false;
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 ( debug ) {
DebugUtil.debugln(getClass(), debug, "Looking for table " + tableName + " with PK " + primaryKey);
DebugUtil.debugln(getClass(), 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 HashMap getPkMap(String tableName) {
HashMap 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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