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/*
* The MIT License
* Copyright © 2021-present KuFlow S.L.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.kuflow.temporal.common.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import javax.annotation.Nullable;
public abstract class StreamUtils {
public static final int BUFFER_SIZE = 4096;
/**
* Copy the contents of the given InputStream into a String.
* Leaves the stream open when done.
* @param in the InputStream to copy from (may be {@code null} or empty)
* @param charset the {@link Charset} to use to decode the bytes
* @return the String that has been copied to (possibly empty)
* @throws IOException in case of I/O errors
*/
public static String copyToString(@Nullable InputStream in, Charset charset) throws IOException {
if (in == null) {
return "";
}
StringBuilder out = new StringBuilder(BUFFER_SIZE);
InputStreamReader reader = new InputStreamReader(in, charset);
char[] buffer = new char[BUFFER_SIZE];
int charsRead;
while ((charsRead = reader.read(buffer)) != -1) {
out.append(buffer, 0, charsRead);
}
return out.toString();
}
}