/*
* 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;
}
}