io.undertow.util.FileUtils Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.util;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
/**
* @author Stuart Douglas
*/
public class FileUtils {
private FileUtils() {
}
public static String readFile(Class testClass, String fileName) {
final URL res = testClass.getResource(fileName);
return readFile(res);
}
public static String readFile(URL url) {
try {
return readFile(url.openStream());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* Reads the {@link InputStream file} and converting it to {@link String} using UTF-8 encoding.
*/
public static String readFile(InputStream file) {
try (BufferedInputStream stream = new BufferedInputStream(file)) {
byte[] buff = new byte[1024];
StringBuilder builder = new StringBuilder();
int read;
while ((read = stream.read(buff)) != -1) {
builder.append(new String(buff, 0, read, StandardCharsets.UTF_8));
}
return builder.toString();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void deleteRecursive(final Path directory) throws IOException {
if(!Files.isDirectory(directory)) {
return;
}
Files.walkFileTree(directory, new SimpleFileVisitor() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
try {
Files.delete(file);
} catch (IOException e) {
// ignored
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
try {
Files.delete(dir);
} catch (IOException e) {
// ignored
}
return FileVisitResult.CONTINUE;
}
});
}
}