org.apache.sshd.common.util.io.PathUtils Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.sshd.common.util.io;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Comparator;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Supplier;
import org.apache.sshd.common.util.GenericUtils;
import org.apache.sshd.common.util.ValidateUtils;
import org.apache.sshd.common.util.functors.UnaryEquator;
/**
* @author Apache MINA SSHD Project
*/
public final class PathUtils {
/** Compares 2 {@link Path}-s by their case insensitive {@link Path#getFileName() filename} */
public static final Comparator BY_CASE_INSENSITIVE_FILENAME
= (p1, p2) -> PathUtils.safeCompareFilename(p1, p2, false);
public static final UnaryEquator EQ_CASE_INSENSITIVE_FILENAME
= (p1, p2) -> BY_CASE_INSENSITIVE_FILENAME.compare(p1, p2) == 0;
/** Compares 2 {@link Path}-s by their case sensitive {@link Path#getFileName() filename} */
public static final Comparator BY_CASE_SENSITIVE_FILENAME = (p1, p2) -> PathUtils.safeCompareFilename(p1, p2, true);
public static final UnaryEquator EQ_CASE_SENSITIVE_FILENAME
= (p1, p2) -> BY_CASE_SENSITIVE_FILENAME.compare(p1, p2) == 0;
public static final char HOME_TILDE_CHAR = '~';
private static final AtomicReference> USER_HOME_RESOLVER_HOLDER = new AtomicReference<>();
private static final class LazyDefaultUserHomeFolderHolder {
private static final Path PATH
= Paths.get(ValidateUtils.checkNotNullAndNotEmpty(System.getProperty("user.home"), "No user home"))
.toAbsolutePath()
.normalize();
private LazyDefaultUserHomeFolderHolder() {
throw new UnsupportedOperationException("No instance allowed");
}
}
/**
* Private Constructor
*/
private PathUtils() {
throw new UnsupportedOperationException("No instance allowed");
}
/**
* Compares 2 {@link Path}-s by their {@link Path#getFileName() filename} while allowing for one or both to be
* {@code null}.
*
* @param p1 1st {@link Path}
* @param p2 2nd {@link Path}
* @param caseSensitive Whether comparison is case sensitive
* @return Comparison results - {@code null}-s are considered "greater" than
* non-{@code null}-s
*/
public static int safeCompareFilename(Path p1, Path p2, boolean caseSensitive) {
if (UnaryEquator.isSameReference(p1, p2)) {
return 0;
} else if (p1 == null) {
return 1;
} else if (p2 == null) {
return -1;
}
String n1 = Objects.toString(p1.getFileName(), null);
String n2 = Objects.toString(p2.getFileName(), null);
return GenericUtils.safeCompare(n1, n2, caseSensitive);
}
/**
*
* - Replaces leading '~' with user's HOME directory
* - Replaces any forward slashes with the O/S directory separator
*
*
* @param path Input path - ignored if {@code null}/empty/blank
* @return Adjusted path
*/
public static String normalizePath(String path) {
if (GenericUtils.isBlank(path)) {
return path;
}
if (path.charAt(0) == HOME_TILDE_CHAR) {
Path homeDir = Objects.requireNonNull(getUserHomeFolder(), "No user home folder available");
if (path.length() > 1) {
path = homeDir + path.substring(1);
} else {
path = homeDir.toString();
}
}
return path.replace('/', File.separatorChar);
}
/**
* @return The {@link Path} to the currently running user home
* @see #setUserHomeFolderResolver(Supplier)
*/
@SuppressWarnings("synthetic-access")
public static Path getUserHomeFolder() {
Supplier resolver;
synchronized (USER_HOME_RESOLVER_HOLDER) {
resolver = USER_HOME_RESOLVER_HOLDER.get();
}
return (resolver == null) ? LazyDefaultUserHomeFolderHolder.PATH : resolver.get();
}
/**
* Set the reported value from {@link #getUserHomeFolder()}
*
* @param resolver The {@link Path} provider to report - if {@code null} then "user.home" system property
* will be used
*/
public static void setUserHomeFolderResolver(Supplier resolver) {
synchronized (USER_HOME_RESOLVER_HOLDER) {
USER_HOME_RESOLVER_HOLDER.set(resolver);
}
}
public static StringBuilder appendUserHome(StringBuilder sb) {
return appendUserHome(sb, getUserHomeFolder());
}
public static StringBuilder appendUserHome(StringBuilder sb, Path userHome) {
return appendUserHome(sb, Objects.requireNonNull(userHome, "No user home folder").toString());
}
public static StringBuilder appendUserHome(StringBuilder sb, String userHome) {
if (GenericUtils.isEmpty(userHome)) {
return sb;
}
sb.append(userHome);
// strip any ending separator since we add our own
int len = sb.length();
if (sb.charAt(len - 1) == File.separatorChar) {
sb.setLength(len - 1);
}
return sb;
}
}