/*
* 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.IOException;
import java.util.Map;
import java.util.HashMap;
import org.apache.pig.EvalFunc;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.logicalLayer.schema.Schema;
import org.apache.pig.data.DataType;
public class CreateMap extends EvalFunc<Map<String, Object> >
{
//@Override
public Map<String, Object> exec(Tuple input) throws IOException
{
if (input == null || input.size() < 2)
{
return null;
}
String key;
Object val;
try{
key = (String)input.get(0);
val = input.get(1);
}catch(Exception e){
System.err.println("Failed to process input data; error: " + e.getMessage());
return null;
}
HashMap<String, Object> output = new HashMap<String, Object>(1);
output.put(key, val);
return output;
}
@Override
public Schema outputSchema(Schema input) {
return new Schema(new Schema.FieldSchema(getSchemaName("createmap", input), DataType.MAP));
}
}