| /* |
| * 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.common.serialization; |
| |
| import org.apache.flink.annotation.PublicEvolving; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.charset.Charset; |
| |
| /** |
| * A simple {@link Encoder} that uses {@code toString()} on the input elements and |
| * writes them to the output bucket file separated by newline. |
| * |
| * @param <IN> The type of the elements that are being written by the sink. |
| */ |
| @PublicEvolving |
| public class SimpleStringEncoder<IN> implements Encoder<IN> { |
| |
| private static final long serialVersionUID = -6865107843734614452L; |
| |
| private String charsetName; |
| |
| private transient Charset charset; |
| |
| /** |
| * Creates a new {@code StringWriter} that uses {@code "UTF-8"} charset to convert |
| * strings to bytes. |
| */ |
| public SimpleStringEncoder() { |
| this("UTF-8"); |
| } |
| |
| /** |
| * Creates a new {@code StringWriter} that uses the given charset to convert |
| * strings to bytes. |
| * |
| * @param charsetName Name of the charset to be used, must be valid input for {@code Charset.forName(charsetName)} |
| */ |
| public SimpleStringEncoder(String charsetName) { |
| this.charsetName = charsetName; |
| } |
| |
| @Override |
| public void encode(IN element, OutputStream stream) throws IOException { |
| if (charset == null) { |
| charset = Charset.forName(charsetName); |
| } |
| |
| stream.write(element.toString().getBytes(charset)); |
| stream.write('\n'); |
| } |
| } |