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EncoderStream.java
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EncoderStream.java
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/*
* Copyright 2019 Sabirov Evgenii (sabirov.e@gmail.com)
*
* Licensed 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
*
* https://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.github.sabirove.codec;
import com.github.sabirove.codec.function.CodecFunction;
import com.github.sabirove.codec.util.CodecUtil;
import java.io.Flushable;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UncheckedIOException;
/**
* {@link OutputStream} wrapper that allows to write the encoded values to the underlying stream.
*/
public final class EncoderStream<T> implements AutoCloseable, Flushable {
private final OutputStream os;
private final CodecFunction<T> function;
EncoderStream(OutputStream os, CodecFunction<T> function) {
this.os = os;
this.function = function;
}
/**
* Encode and write provided {@code value} to the underlying stream.
*
* @throws UncheckedIOException wrapping the original {@link IOException} when IO operation fails
*/
public void write(T value) {
try {
function.write(value, os);
} catch (IOException e) {
CodecUtil.throwUnchecked(e);
}
}
/**
* Shortcut for {@link #write(Object)} and then {@link #flush()}.
*
* @throws UncheckedIOException wrapping the original {@link IOException} when IO operation fails
*/
public void writeAndFlush(T value) {
write(value);
flush();
}
/**
* Shortcut for {@link #write(Object)} and then {@link #close()}.
*
* @throws UncheckedIOException wrapping the original {@link IOException} when IO operation fails
*/
public void writeAndClose(T value) {
try (EncoderStream<T> es = this) {
es.write(value);
}
}
/**
* Flushes the underlying {@link OutputStream} as per the {@link Flushable} contract.
*
* @throws UncheckedIOException wrapping the original {@link IOException} when IO operation fails
*/
@Override
public void flush() {
try {
os.flush();
} catch (IOException e) {
CodecUtil.throwUnchecked(e);
}
}
/**
* Closes the underlying {@link OutputStream} as per the {@link AutoCloseable} contract.
*
* @throws UncheckedIOException wrapping the original {@link IOException} when IO operation fails
*/
@Override
public void close() {
try (OutputStream os = this.os) {
os.flush();
} catch (IOException e) {
CodecUtil.throwUnchecked(e);
}
}
}