| /* |
| * 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.impl.logicalLayer; |
| |
| import java.util.Map; |
| |
| import org.apache.pig.impl.eval.EvalSpec; |
| import org.apache.pig.impl.logicalLayer.schema.TupleSchema; |
| |
| |
| public class LOSort extends LogicalOperator { |
| private static final long serialVersionUID = 1L; |
| private EvalSpec sortSpec; |
| |
| |
| protected EvalSpec spec; |
| |
| public EvalSpec getSpec() { |
| return spec; |
| } |
| |
| public LOSort(Map<OperatorKey, LogicalOperator> opTable, |
| String scope, |
| long id, |
| OperatorKey input, |
| EvalSpec sortSpec) { |
| super(opTable, scope, id, input); |
| this.sortSpec = sortSpec; |
| getOutputType(); |
| } |
| |
| @Override |
| public String name() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("SORT "); |
| sb.append(scope); |
| sb.append("-"); |
| sb.append(id); |
| return sb.toString(); |
| } |
| |
| @Override |
| public String arguments() { |
| return sortSpec.toString(); |
| } |
| |
| @Override |
| public int getOutputType() { |
| switch (opTable.get(getInputs().get(0)).getOutputType()) { |
| case FIXED: |
| return FIXED; |
| default: |
| throw new RuntimeException |
| ("Blocking operator such as sort cannot handle streaming input"); |
| } |
| } |
| |
| @Override |
| public TupleSchema outputSchema() { |
| if (schema == null) |
| schema = opTable.get(getInputs().get(0)).outputSchema().copy(); |
| |
| schema.setAlias(alias); |
| return schema; |
| |
| } |
| |
| public EvalSpec getSortSpec() { |
| return sortSpec; |
| } |
| |
| public void visit(LOVisitor v) { |
| v.visitSort(this); |
| } |
| |
| } |