org.apache.ambari.view.hive.resources.uploads.parsers.csv.CSVParser.java Source code

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Here is the source code for org.apache.ambari.view.hive.resources.uploads.parsers.csv.CSVParser.java

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/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.ambari.view.hive.resources.uploads.parsers.csv;

import org.apache.ambari.view.hive.client.Row;
import org.apache.ambari.view.hive.resources.uploads.parsers.ParseOptions;
import org.apache.ambari.view.hive.resources.uploads.parsers.Parser;
import org.apache.commons.csv.CSVFormat;

import java.io.*;
import java.util.*;

/**
 * Parses the given Reader which contains CSV stream and extracts headers and rows, and detect datatypes of columns
 */
public class CSVParser extends Parser {

    private CSVIterator iterator;
    private org.apache.commons.csv.CSVParser parser;

    public CSVParser(Reader reader, ParseOptions parseOptions) throws IOException {
        super(reader, parseOptions);
        parser = new org.apache.commons.csv.CSVParser(this.reader, CSVFormat.EXCEL);
        iterator = new CSVIterator(parser.iterator());
    }

    @Override
    public Row extractHeader() {
        return this.iterator().next();
    }

    @Override
    public void close() throws IOException {
        this.parser.close();
    }

    public Iterator<Row> iterator() {
        return iterator; // only one iterator per parser.
    }
}