/** * Copyright 2011, Big Switch Networks, Inc. * Originally created by David Erickson, Stanford University * * 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 net.floodlightcontroller.storage; import java.util.ArrayList; import java.util.List; public class RowOrdering { public enum Direction { ASCENDING, DESCENDING }; public class Item { private String column; private Direction direction; public Item(String column, Direction direction) { assert(column != null); assert(direction != null); this.column = column; this.direction = direction; } public String getColumn() { return column; } public Direction getDirection() { return direction; } } private List<Item> itemList = new ArrayList<Item>(); public RowOrdering() { } public RowOrdering(String column) { add(column); } public RowOrdering(String column, Direction direction) { add(column, direction); } public RowOrdering(Item item) { add(item); } public RowOrdering(Item[] itemArray) { add(itemArray); } public RowOrdering(List<Item> itemList) { add(itemList); } public void add(String column) { itemList.add(new Item(column, Direction.ASCENDING)); } public void add(String column, Direction direction) { itemList.add(new Item(column, direction)); } public void add(Item item) { assert(item != null); itemList.add(item); } public void add(Item[] itemArray) { for (Item item: itemArray) { itemList.add(item); } } public void add(List<Item> itemList) { this.itemList.addAll(itemList); } public List<Item> getItemList() { return itemList; } public boolean equals(RowOrdering rowOrdering) { if (rowOrdering == null) return false; int len1 = itemList.size(); int len2 = rowOrdering.getItemList().size(); if (len1 != len2) return false; for (int i = 0; i < len1; i++) { Item item1 = itemList.get(i); Item item2 = rowOrdering.getItemList().get(i); if (!item1.getColumn().equals(item2.getColumn()) || item1.getDirection() != item2.getDirection()) return false; } return true; } }