| /* |
| * 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.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.expressionOperators.regex.RegexInit; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.regex.RegexImpl; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhyPlanVisitor; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.impl.plan.OperatorKey; |
| import org.apache.pig.impl.plan.NodeIdGenerator; |
| import org.apache.pig.impl.plan.VisitorException; |
| |
| public class PORegexp extends BinaryComparisonOperator { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private RegexImpl impl = null; |
| |
| public PORegexp(OperatorKey k) { |
| this(k, -1); |
| } |
| |
| public PORegexp(OperatorKey k, int rp) { |
| super(k, rp); |
| resultType = DataType.BOOLEAN; |
| // We set impl RegexInit. |
| // RegexInit decides what plan to choose after looking |
| // at first tuple. And resets this.impl to new implementation |
| this.impl = new RegexInit(this); |
| } |
| |
| public void setImplementation( RegexImpl impl ) { |
| this.impl = impl; |
| } |
| |
| @Override |
| public void visit(PhyPlanVisitor v) throws VisitorException { |
| v.visitRegexp(this); |
| } |
| |
| @Override |
| public String name() { |
| return "Matches - " + mKey.toString(); |
| } |
| |
| public void setConstExpr( boolean rhsConstant ) { |
| ((RegexInit)this.impl).setConstExpr(rhsConstant); |
| } |
| |
| @Override |
| public Result getNextBoolean() throws ExecException { |
| Result r = accumChild(null, DataType.CHARARRAY); |
| if (r != null) { |
| return r; |
| } |
| |
| Result left, right; |
| |
| left = lhs.getNextString(); |
| right = rhs.getNextString(); |
| |
| if (left.returnStatus != POStatus.STATUS_OK || left.result == null) return left; |
| if (right.returnStatus != POStatus.STATUS_OK || right.result == null) return right; |
| |
| if( impl.match((String)(left.result),(String)(right.result)) ) { |
| left.result = Boolean.TRUE; |
| } else { |
| left.result = Boolean.FALSE; |
| } |
| illustratorMarkup(null, left.result, (Boolean) left.result ? 0 : 1); |
| return left; |
| } |
| |
| @Override |
| public PORegexp clone() throws CloneNotSupportedException { |
| PORegexp clone = new PORegexp(new OperatorKey(mKey.scope, |
| NodeIdGenerator.getGenerator().getNextNodeId(mKey.scope))); |
| clone.cloneHelper(this); |
| return clone; |
| } |
| } |