| /* |
| * 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.pig; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.pig.classification.InterfaceAudience; |
| import org.apache.pig.classification.InterfaceStability; |
| import org.apache.pig.impl.util.Utils; |
| |
| /** |
| * Class to communicate sort column information based on |
| * order by statment's sort columns and schema |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class SortInfo implements Serializable { |
| |
| /** |
| * |
| */ |
| private static final long serialVersionUID = 1L; |
| |
| boolean isGloballySorted = true; // in pig this is the default |
| |
| List<SortColInfo> sortColInfoList; |
| |
| /** |
| * @param sortColInfoList list of sortColInfo, one for each field in the data |
| */ |
| public SortInfo(List<SortColInfo> sortColInfoList){ |
| this.sortColInfoList = sortColInfoList; |
| } |
| |
| /** |
| * @return the sortColInfoList the list of sortColInfo for this data |
| */ |
| public List<SortColInfo> getSortColInfoList() { |
| return new ArrayList<SortColInfo>(sortColInfoList); |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((sortColInfoList == null) ? 0 : |
| sortColInfoList.hashCode()); |
| result = prime * result + (isGloballySorted ? 1: 0); |
| return result; |
| } |
| |
| /** |
| * @return the isGloballySorted true if the data is globally sorted, false if it is sorted |
| * only within each part file. |
| */ |
| public boolean isGloballySorted() { |
| return isGloballySorted; |
| } |
| |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if(!Utils.checkNullAndClass(this, obj)) { |
| return false; |
| } |
| SortInfo other = (SortInfo)obj; |
| return ( |
| isGloballySorted == other.isGloballySorted && |
| Utils.checkNullEquals(sortColInfoList, other.sortColInfoList, true)); |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| return "GlobalSort:" + isGloballySorted +", sort column info list:" + sortColInfoList; |
| } |
| |
| |
| |
| } |