/*
* 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.test.udf.evalfunc;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.filecache.DistributedCache;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.Path;
import org.apache.pig.EvalFunc;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.util.UDFContext;
public class Udfcachetest extends EvalFunc<String> {
private String file;
public Udfcachetest(String f) {
super();
file = f;
}
public String exec(Tuple input) throws IOException {
// Read and return the first line of the file
String f = null;
try {
URI uri = new URI(file);
f = uri.getPath();
} catch (URISyntaxException use) {
throw new IOException("Unable to parse URI " + file +
". Cannot ship to distributed cache.", use);
}
FileReader fr = new FileReader("./foodle");
BufferedReader d = new BufferedReader(fr);
String s = d.readLine();
fr.close();
return s;
}
public List<String> getCacheFiles() {
List<String> list = new ArrayList<String>(1);
list.add(file);
log.info("UDF returning " + file);
return list;
}
}