| /* |
| * 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.backend.hadoop.executionengine.physicalLayer.expressionOperators; |
| |
| import org.apache.pig.PigException; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhyPlanVisitor; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.impl.plan.NodeIdGenerator; |
| import org.apache.pig.impl.plan.OperatorKey; |
| import org.apache.pig.impl.plan.VisitorException; |
| |
| public class POIsNull extends UnaryComparisonOperator { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public POIsNull(OperatorKey k, int rp) { |
| super(k, rp); |
| |
| } |
| |
| public POIsNull(OperatorKey k) { |
| super(k); |
| |
| } |
| |
| public POIsNull(OperatorKey k, int rp, ExpressionOperator in) { |
| super(k, rp); |
| this.expr = in; |
| } |
| |
| @Override |
| public void visit(PhyPlanVisitor v) throws VisitorException { |
| v.visitIsNull(this); |
| } |
| |
| @Override |
| public String name() { |
| // TODO Auto-generated method stub |
| return "POIsNull" + "[" + DataType.findTypeName(resultType) + "]" +" - " + mKey.toString(); |
| } |
| |
| @Override |
| public Result getNextBoolean() throws ExecException { |
| |
| Result res = null; |
| switch(operandType) { |
| case DataType.BYTEARRAY: |
| case DataType.DOUBLE: |
| case DataType.INTEGER: |
| case DataType.BIGINTEGER: |
| case DataType.BIGDECIMAL: |
| case DataType.CHARARRAY: |
| case DataType.BOOLEAN: |
| case DataType.LONG: |
| case DataType.FLOAT: |
| case DataType.DATETIME: |
| case DataType.MAP: |
| case DataType.TUPLE: |
| case DataType.BAG: |
| res = expr.getNext(operandType); |
| if(res.returnStatus == POStatus.STATUS_OK) { |
| if (res.result == null) { |
| res.result = true; |
| } else { |
| res.result = false; |
| } |
| illustratorMarkup(null, res.result, (Boolean) res.result ? 0 : 1); |
| } |
| return res; |
| default: { |
| int errCode = 2067; |
| String msg = this.getClass().getSimpleName() + " does not know how to " + |
| "handle type: " + DataType.findTypeName(operandType); |
| throw new ExecException(msg, errCode, PigException.BUG); |
| } |
| |
| } |
| } |
| |
| @Override |
| public POIsNull clone() throws CloneNotSupportedException { |
| POIsNull clone = new POIsNull(new OperatorKey(mKey.scope, |
| NodeIdGenerator.getGenerator().getNextNodeId(mKey.scope))); |
| clone.cloneHelper(this); |
| return clone; |
| } |
| } |