| /* |
| * Copyright 2009-2013 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.pregelix.runtime.touchpoint; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputer; |
| import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputerFactory; |
| import edu.uci.ics.pregelix.api.graph.NormalizedKeyComputer; |
| |
| /** |
| * This class wraps the user-defined normalized key computer to calculate the normalized |
| * key of vertex ids. |
| * |
| * @author yingyib |
| */ |
| public class VertexIdNormalizedKeyComputerFactory implements INormalizedKeyComputerFactory { |
| private static final long serialVersionUID = 1L; |
| private Class<? extends NormalizedKeyComputer> nmkComputerClass; |
| |
| public VertexIdNormalizedKeyComputerFactory(Class<? extends NormalizedKeyComputer> nmkComputerClass) { |
| this.nmkComputerClass = nmkComputerClass; |
| } |
| |
| @Override |
| public INormalizedKeyComputer createNormalizedKeyComputer() { |
| try { |
| final NormalizedKeyComputer nmkComputer = nmkComputerClass.newInstance(); |
| return new INormalizedKeyComputer() { |
| |
| @Override |
| public int normalize(byte[] bytes, int start, int length) { |
| return nmkComputer.getNormalizedKey(bytes, start, length); |
| } |
| |
| }; |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| } |