/*
 * 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.Iterator;
import java.util.List;

/**
 * Manages a set of graph-change operations. This simple implementaiton can be 
 * replaced with a version that provides R/I sorting
 * 
 */
public class Changes {

    private InsertList inserts = new InsertList();

    private UpdateList updates = new UpdateList();

    private DeleteList deletes = new DeleteList();

    public void addInsert(ChangeOperation c) {
        inserts.add(c);
    }

    public void addUpdate(ChangeOperation c) {
        updates.add(c);
    }

    public void addDelete(ChangeOperation c) {
        deletes.add(c);
    }

    /**
     * Execute all my change
     */
    public void execute() {

        Iterator i = inserts.getSortedList().iterator();
        while (i.hasNext()) {
            ChangeOperation c = (ChangeOperation) i.next();
            c.execute();
        }

        i = updates.getSortedList().iterator();
        while (i.hasNext()) {
            ChangeOperation c = (ChangeOperation) i.next();
            c.execute();
        }

        i = deletes.getSortedList().iterator();
        while (i.hasNext()) {
            ChangeOperation c = (ChangeOperation) i.next();
            c.execute();
        }

    }

    public void setInsertOrder(List insertOrder) {
        inserts.setOrder(insertOrder);
    }

    public void setDeleteOrder(List deleteOrder) {
        deletes.setOrder(deleteOrder);
    }

}