/*
* 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;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.Properties;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pig.ExecType;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.impl.logicalLayer.FrontendException;
import org.apache.pig.impl.logicalLayer.LogicalPlan;
import org.apache.pig.impl.logicalLayer.LogicalOperator;
@Deprecated
public class StandAloneParser {
private static final Log log = LogFactory.getLog(StandAloneParser.class);
static PigServer pig;
public static void main(String args[]) throws IOException, ExecException {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
pig = new PigServer(ExecType.LOCAL, new Properties());
while (true) {
System.out.print("> ");
String line;
try {
line = in.readLine();
} catch (IOException e) {
log.error(e);
return;
}
if (line != null){
if (line.toLowerCase().equals("quit")) break;
if (line.toLowerCase().startsWith("#")) continue;
else tryParse(line);
}
}
}
private static void tryParse(String query) {
if (query.trim().equals(""))
return;
try{
pig.registerQuery(query);
System.out.print("Current aliases: ");
Map<String, LogicalPlan> aliasPlan = pig.getAliases();
for (Iterator<Map.Entry<String,LogicalPlan>> it = aliasPlan.entrySet().iterator(); it.hasNext(); ) {
Map.Entry<String, LogicalPlan> e = it.next();
LogicalPlan lp = e.getValue();
System.out.print(e.getKey() + "->" + lp.getLeaves().get(0).getSchema());
if (it.hasNext()) System.out.print(", \n");
else System.out.print("\n");
}
} catch (IOException e) {
log.error(e);
}
}
}