/**
* 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.hive20.resources.uploads.parsers;
import org.apache.ambari.view.hive20.client.Row;
import org.apache.ambari.view.hive20.resources.uploads.parsers.csv.opencsv.OpenCSVParser;
import org.apache.ambari.view.hive20.resources.uploads.parsers.json.JSONParser;
import org.apache.ambari.view.hive20.resources.uploads.parsers.xml.XMLParser;
import java.io.Reader;
import java.util.Iterator;
/**
* Wrapper/Decorator over the Stream parsers.
* Supports XML/JSON/CSV parsing.
*/
public class DataParser implements IParser {
private IParser parser;
public DataParser(Reader reader, ParseOptions parseOptions) throws Exception {
if (parseOptions.getOption(ParseOptions.OPTIONS_FILE_TYPE).equals(ParseOptions.InputFileType.CSV.toString())) {
parser = new OpenCSVParser(reader, parseOptions);
} else if (parseOptions.getOption(ParseOptions.OPTIONS_FILE_TYPE).equals(ParseOptions.InputFileType.JSON.toString())) {
parser = new JSONParser(reader, parseOptions);
} else if (parseOptions.getOption(ParseOptions.OPTIONS_FILE_TYPE).equals(ParseOptions.InputFileType.XML.toString())) {
parser = new XMLParser(reader, parseOptions);
}
}
@Override
public PreviewData parsePreview() {
return parser.parsePreview();
}
@Override
public Row extractHeader() {
return parser.extractHeader();
}
@Override
public void close() throws Exception {
parser.close();
}
@Override
public Iterator<Row> iterator() {
return parser.iterator();
}
}