com.github.alexdlaird.util.StringUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2021-2024 Alex Laird
*
* SPDX-License-Identifier: MIT
*/
package com.github.alexdlaird.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
/**
* Convenience methods for String manipulation.
*/
public class StringUtils {
private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
/**
* Convert an {@link InputStream} to a String.
*
* @param inputStream The Input Stream to read from.
* @param charset The charset of the Input Stream.
* @return The resulting String.
* @throws IOException An I/O exception occurred.
*/
public static String streamToString(final InputStream inputStream, final Charset charset)
throws IOException {
if (inputStream == null) {
return null;
}
final char[] buffer = new char[DEFAULT_BUFFER_SIZE];
final StringBuilder stringBuilder = new StringBuilder();
final Reader reader = new InputStreamReader(inputStream, charset);
int size = reader.read(buffer, 0, buffer.length);
while (size >= 0) {
stringBuilder.append(buffer, 0, size);
size = reader.read(buffer, 0, buffer.length);
}
return stringBuilder.toString();
}
/**
* Check that a String contains text.
*
* @param cs The character sequence to check for text.
* @return true if not blank.
*/
public static boolean isNotBlank(final CharSequence cs) {
return !isBlank(cs);
}
/**
* Check that a String does not contain text.
*
* @param cs The character sequence to check for text.
* @return true if blank.
*/
public static boolean isBlank(final CharSequence cs) {
int strLen;
if (cs == null || (strLen = cs.length()) == 0) {
return true;
}
for (int i = 0; i < strLen; i++) {
if (!Character.isWhitespace(cs.charAt(i))) {
return false;
}
}
return true;
}
}