| /* |
| * 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.giraph.block_app.framework.block; |
| |
| import com.google.common.base.Objects; |
| |
| /** |
| * Number of pieces |
| */ |
| public class PieceCount { |
| private boolean known; |
| private int count; |
| |
| public PieceCount(int count) { |
| known = true; |
| this.count = count; |
| } |
| |
| private PieceCount() { |
| known = false; |
| } |
| |
| public static PieceCount createUnknownCount() { |
| return new PieceCount(); |
| } |
| |
| |
| public PieceCount add(PieceCount other) { |
| if (!this.known || !other.known) { |
| known = false; |
| } else { |
| count += other.count; |
| } |
| return this; |
| } |
| |
| public PieceCount multiply(int value) { |
| count *= value; |
| return this; |
| } |
| |
| public int getCount() { |
| if (known) { |
| return count; |
| } else { |
| throw new IllegalStateException( |
| "Can't get superstep count when it's unknown"); |
| } |
| } |
| |
| public boolean isKnown() { |
| return known; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof PieceCount) { |
| PieceCount other = (PieceCount) obj; |
| if (known) { |
| return other.known && other.count == count; |
| } else { |
| return !other.known; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(known, count); |
| } |
| } |