1 files changed, 104 insertions, 0 deletions

diff --git a/das-java/tags/1.0-incubating-beta2-rc1/rdb/src/main/java/org/apache/tuscany/das/rdb/graphbuilder/impl/MultiTableRegistry.java b/das-java/tags/1.0-incubating-beta2-rc1/rdb/src/main/java/org/apache/tuscany/das/rdb/graphbuilder/impl/MultiTableRegistry.java
new file mode 100644
index 0000000000..7a96d7f66a
--- /dev/null
+++ b/das-java/tags/1.0-incubating-beta2-rc1/rdb/src/main/java/org/apache/tuscany/das/rdb/graphbuilder/impl/MultiTableRegistry.java
@@ -0,0 +1,104 @@
+/*
+ * 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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