/*
* 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.flink.api.java.io;
import java.io.IOException;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.UnsupportedCharsetException;
import org.apache.flink.api.common.io.FileOutputFormat;
import org.apache.flink.core.fs.Path;
public class TextOutputFormat<T> extends FileOutputFormat<T> {
private static final long serialVersionUID = 1L;
private static final int NEWLINE = '\n';
private String charsetName;
private transient Charset charset;
// --------------------------------------------------------------------------------------------
public static interface TextFormatter<IN> extends Serializable {
public String format(IN value);
}
public TextOutputFormat(Path outputPath) {
this(outputPath, "UTF-8");
}
public TextOutputFormat(Path outputPath, String charset) {
super(outputPath);
this.charsetName = charset;
}
public String getCharsetName() {
return charsetName;
}
public void setCharsetName(String charsetName) throws IllegalCharsetNameException, UnsupportedCharsetException {
if (charsetName == null) {
throw new NullPointerException();
}
if (!Charset.isSupported(charsetName)) {
throw new UnsupportedCharsetException("The charset " + charsetName + " is not supported.");
}
this.charsetName = charsetName;
}
// --------------------------------------------------------------------------------------------
@Override
public void open(int taskNumber, int numTasks) throws IOException {
super.open(taskNumber, numTasks);
try {
this.charset = Charset.forName(charsetName);
}
catch (IllegalCharsetNameException e) {
throw new IOException("The charset " + charsetName + " is not valid.", e);
}
catch (UnsupportedCharsetException e) {
throw new IOException("The charset " + charsetName + " is not supported.", e);
}
}
@Override
public void writeRecord(T record) throws IOException {
byte[] bytes = record.toString().getBytes(charset);
this.stream.write(bytes);
this.stream.write(NEWLINE);
}
// --------------------------------------------------------------------------------------------
@Override
public String toString() {
return "TextOutputFormat (" + getOutputFilePath() + ") - " + this.charsetName;
}
}