spork-master/src/org/apache/pig/backend/hadoop/executionengine/physicalLayer/relationalOperators/PONative.java
/*
 * 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.relationalOperators;

import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator;
import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhyPlanVisitor;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.plan.OperatorKey;
import org.apache.pig.impl.plan.VisitorException;
import org.apache.pig.impl.util.Utils;

public class PONative extends PhysicalOperator {
    
    private static final long serialVersionUID = 1L;

    String nativeMRjar;
    String[] params;

    public PONative(OperatorKey k) {
        super(k);
    }

    @Override
    public void visit(PhyPlanVisitor v) throws VisitorException {
        v.visitNative(this);
    }

    @Override
    public String name() {
        return getAliasString() + "Native" + "('hadoop jar "
        + nativeMRjar + " " + Utils.getStringFromArray(getParams()) + "')" 
        + " - " + mKey.toString();
    }

    public String getNativeMRjar() {
        return nativeMRjar;
    }

    public void setNativeMRjar(String nativeMRjar) {
        this.nativeMRjar = nativeMRjar;
    }

    public String[] getParams() {
        unquotePropertyParams();
        return params;
    }

    /**
     * if there is a argument that starts with "-D", unquote the value part
     * to support use case in PIG-1917
     */
    private void unquotePropertyParams() {
        for(int i=0; i<params.length; i++){
            String param = params[i];
            if(param.startsWith("-D")){
                int equalPos = param.indexOf('=');
                //to unquote, there should be a '=', then at least two quotes
                if(equalPos == -1 || equalPos >= param.length() - 3)
                    continue;

                if(checkQuote(equalPos+1, param,'\'')
                        || checkQuote(equalPos + 1, param, '"')
                ){
                    //found quoted value part, remove the quotes
                    params[i] = param.substring(0, equalPos + 1) 
                     + param.substring(equalPos + 2, param.length() - 1);
                }
            }
        }
    }

    private boolean checkQuote(int i, String param, char quote) {
        return param.charAt(i) == quote && param.charAt(param.length()-1) == quote;
    }

    public void setParams(String[] params) {
        this.params = params;
    }

    @Override
    public boolean supportsMultipleInputs() {
        return false;
    }

    @Override
    public boolean supportsMultipleOutputs() {
        return false;
    }

    @Override
    public Tuple illustratorMarkup(Object in, Object out, int eqClassIndex) {
        return null;
    }
}
