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A headless browser intended for use in testing web-based applications.
/*
* Copyright (c) 2002-2017 Gargoyle Software Inc.
*
* 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
* 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.gargoylesoftware.htmlunit;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
/**
* Utility methods relating to text.
*
* @author Mike Bowler
* @author Brad Clarke
* @author Ahmed Ashour
*/
public final class TextUtil {
/**
* Default charset used.
*/
public static final Charset DEFAULT_CHARSET = StandardCharsets.ISO_8859_1;
/** Private constructor to prevent instantiation. */
private TextUtil() { }
/**
* Convert a string into an input stream.
* @param content the string
* @return the resulting input stream
*/
public static InputStream toInputStream(final String content) {
return toInputStream(content, DEFAULT_CHARSET);
}
/**
* Convert a string into an input stream.
* @param content the string
* @param charset the encoding to use when converting the string to a stream
* @return the resulting input stream
* @throws UnsupportedEncodingException if the encoding is not supported
*/
public static InputStream toInputStream(
final String content,
final Charset charset) {
try {
final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(content.length() * 2);
final OutputStreamWriter writer = new OutputStreamWriter(byteArrayOutputStream, charset);
writer.write(content);
writer.flush();
final byte[] byteArray = byteArrayOutputStream.toByteArray();
return new ByteArrayInputStream(byteArray);
}
catch (final IOException e) {
// Theoretically impossible since all the "IO" is in memory but it's a
// checked exception so we have to catch it.
throw new IllegalStateException("Exception when converting a string to an input stream: '" + e + "'", e);
}
}
/**
* Converts a string into a byte array using the specified encoding.
*
* @param charset the charset
* @param content the string to convert
* @return the String as a byte[]; if the specified encoding is not supported an empty byte[] will be returned
*/
public static byte[] stringToByteArray(final String content, final Charset charset) {
if (content == null || content.isEmpty() || charset == null) {
return new byte[0];
}
return content.getBytes(charset);
}
}