1 files changed, 95 insertions, 0 deletions
diff --git a/das-java/tags/1.0-incubating-beta1/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/InsertList.java b/das-java/tags/1.0-incubating-beta1/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/InsertList.java
new file mode 100644
index 0000000000..e61ccfe21e
--- /dev/null
+++ b/das-java/tags/1.0-incubating-beta1/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/InsertList.java
@@ -0,0 +1,95 @@
+/*
+ * 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.impl;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+/**
+ * InsertList will sort ChangeOperation objects so that parents are inserted before children
+ * 
+ * 
+ */
+public class InsertList {
+    private final Logger logger = Logger.getLogger(InsertList.class);
+
+    private Map opsByTableName = new HashMap();
+
+    private List insertOperations = new ArrayList();
+
+    private List order;
+
+    public void add(ChangeOperation op) {
+        if (this.logger.isDebugEnabled()) {
+            this.logger.debug("Adding insert operation ");
+        }
+
+        // If nothing has been added yet, or this is no ordering, simply
+        // add the operation to the list
+        if ((order.size() == 0) || (op.getTableName() == null)) {
+            insertOperations.add(op);
+        } else {
+            String name = op.getTableName();
+            List ops = (List) opsByTableName.get(name);
+            if (ops == null) {
+                ops = new ArrayList();
+            }
+
+            ops.add(op);
+            opsByTableName.put(name, ops);
+        }
+    }
+
+    public Collection getSortedList() {
+        if (this.logger.isDebugEnabled()) {
+            this.logger.debug("Getting sorted insert list");
+        }
+
+        if ((order.size() > 0) && opsByTableName.keySet().size() > 0) {
+            Iterator i = this.order.iterator();
+            while (i.hasNext()) {
+                String name = (String) i.next();
+                if (this.logger.isDebugEnabled()) {
+                    this.logger.debug("Adding operations for table " + name);
+                }
+
+                // A null here means a table is in the config but hasn't been changed here
+                if (opsByTableName.get(name) != null) {
+                    insertOperations.addAll((Collection) opsByTableName.get(name));
+                }
+            }
+        }
+        if (this.logger.isDebugEnabled()) {
+            this.logger.debug("Returning " + insertOperations.size() + " insert operations");
+        }
+
+        return insertOperations;
+    }
+
+    public void setOrder(List insertOrder) {
+        this.order = insertOrder;
+    }
+
+}