spork-master/contrib/piggybank/java/src/main/java/org/apache/pig/piggybank/storage/PigStorageSchema.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.piggybank.storage;

import org.apache.pig.LoadMetadata;
import org.apache.pig.StoreMetadata;
import org.apache.pig.builtin.PigStorage;

/**
 *  This Load/Store Func reads/writes metafiles that allow the schema and
 *  aliases to be determined at load time, saving one from having to manually
 *  enter schemas for pig-generated datasets.
 *
 *  It also creates a ".pig_headers" file that simply lists the delimited aliases.
 *  This is intended to make export to tools that can read files with header
 *  lines easier (just cat the header to your data).
 * @deprecated Use PigStorage with a -schema option instead
 */
@Deprecated
public class PigStorageSchema extends PigStorage implements LoadMetadata, StoreMetadata {
    public PigStorageSchema() {
        this("\t");
    }

    public PigStorageSchema(String delim) {
        super(delim, "-schema");
    }
}
