com.datasalt.pangool.flow.Utils.java Source code

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Here is the source code for com.datasalt.pangool.flow.Utils.java

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/**
 * Copyright [2012] [Datasalt Systems S.L.]
 *
 * Licensed 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 com.datasalt.pangool.flow;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;

import com.datasalt.pangool.io.ITuple;
import com.datasalt.pangool.io.Schema;
import com.datasalt.pangool.io.Tuple;
import com.datasalt.pangool.io.Schema.Field;
import com.datasalt.pangool.tuplemr.TupleMapper.TupleMRContext;
import com.datasalt.pangool.utils.HadoopUtils;

public class Utils {

    public final static Tuple cacheTuple(Tuple tuple, @SuppressWarnings("rawtypes") TupleMRContext context,
            String schemaName) {
        if (tuple == null) {
            tuple = new Tuple(context.getTupleMRConfig().getIntermediateSchema(schemaName));
        }
        return tuple;
    }

    public static void shallowCopy(ITuple tupleOrig, ITuple tupleDest, String... fields) {
        for (String field : fields) {
            tupleDest.set(field, tupleOrig.get(field));
        }
    }

    public static String[] getFieldNames(Schema schema) {
        List<String> fieldNames = new ArrayList<String>();
        for (Field field : schema.getFields()) {
            fieldNames.add(field.getName());
        }
        return fieldNames.toArray(new String[0]);
    }

    public static void delete(Path path, Configuration conf) throws IOException {
        HadoopUtils.deleteIfExists(path.getFileSystem(conf), path);
    }
}