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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
 *
 * 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.hazelcast.org.apache.calcite.util;

import com.hazelcast.org.checkerframework.checker.nullness.qual.PolyNull;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.nio.charset.Charset;

import static java.util.Objects.requireNonNull;

/**
 * Serializable wrapper around a {@link Charset}.
 *
 * 

It serializes itself by writing out the name of the character set, for * example "ISO-8859-1". On the other side, it deserializes itself by looking * for a charset with the same name. * *

A SerializableCharset is immutable. */ public class SerializableCharset implements Serializable { //~ Instance fields -------------------------------------------------------- private Charset charset; private String charsetName; //~ Constructors ----------------------------------------------------------- /** * Creates a SerializableCharset. External users should call * {@link #forCharset(Charset)}. * * @param charset Character set; must not be null */ private SerializableCharset(Charset charset) { assert charset != null; this.charset = charset; this.charsetName = charset.name(); } //~ Methods ---------------------------------------------------------------- /** * Per {@link Serializable}. */ private void writeObject(ObjectOutputStream out) throws IOException { out.writeObject(charset.name()); } /** * Per {@link Serializable}. */ @SuppressWarnings("JdkObsolete") private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { charsetName = (String) in.readObject(); charset = requireNonNull(Charset.availableCharsets().get(this.charsetName), () -> "charset is not found: " + charsetName); } /** * Returns the wrapped {@link Charset}. * * @return the wrapped Charset */ public Charset getCharset() { return charset; } /** * Returns a SerializableCharset wrapping the given Charset, or null if the * {@code charset} is null. * * @param charset Character set to wrap, or null * @return Wrapped charset */ public static @PolyNull SerializableCharset forCharset(@PolyNull Charset charset) { if (charset == null) { return null; } return new SerializableCharset(charset); } }





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