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//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.start;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystemLoopException;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class PathFinder extends SimpleFileVisitor<Path>
{
// internal tracking of prior notified paths (to avoid repeated notification of same ignored path)
private static Set<Path> NOTIFIED_PATHS = new HashSet<>();
private boolean includeDirsInResults = false;
private Map<String, Path> hits = new HashMap<>();
private Path basePath = null;
private PathMatcher dirMatcher = PathMatchers.getNonHidden();
private PathMatcher fileMatcher = PathMatchers.getNonHidden();
private void addHit(Path path)
{
String relPath = basePath.relativize(path).toString();
StartLog.debug("Found [" + relPath + "] " + path);
hits.put(relPath,path);
}
public PathMatcher getDirMatcher()
{
return dirMatcher;
}
public PathMatcher getFileMatcher()
{
return fileMatcher;
}
public List<File> getHitList()
{
List<File> ret = new ArrayList<>();
for (Path path : hits.values())
{
ret.add(path.toFile());
}
return ret;
}
public Collection<Path> getHits()
{
return hits.values();
}
public boolean isIncludeDirsInResults()
{
return includeDirsInResults;
}
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException
{
if (dirMatcher.matches(dir))
{
StartLog.trace("Following dir: " + dir);
if (includeDirsInResults && fileMatcher.matches(dir))
{
addHit(dir);
}
return FileVisitResult.CONTINUE;
}
else
{
StartLog.trace("Skipping dir: " + dir);
return FileVisitResult.SKIP_SUBTREE;
}
}
/**
* Set the active basePath, used for resolving relative paths.
* <p>
* When a hit arrives for a subsequent find that has the same relative path as a prior hit, the new hit overrides the prior path as the active hit.
*
* @param basePath
* the basePath to tag all hits with
*/
public void setBase(Path basePath)
{
this.basePath = basePath;
}
public void setDirMatcher(PathMatcher dirMatcher)
{
this.dirMatcher = dirMatcher;
}
public void setFileMatcher(PathMatcher fileMatcher)
{
this.fileMatcher = fileMatcher;
}
public void setFileMatcher(String pattern)
{
this.fileMatcher = PathMatchers.getMatcher(pattern);
}
public void setIncludeDirsInResults(boolean includeDirsInResults)
{
this.includeDirsInResults = includeDirsInResults;
}
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException
{
if (fileMatcher.matches(file))
{
addHit(file);
}
else
{
StartLog.trace("Ignoring file: " + file);
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException
{
if (exc instanceof FileSystemLoopException)
{
if (!NOTIFIED_PATHS.contains(file))
{
StartLog.warn("skipping detected filesystem loop: " + file);
NOTIFIED_PATHS.add(file);
}
return FileVisitResult.SKIP_SUBTREE;
}
else
{
StartLog.warn(exc);
return super.visitFileFailed(file,exc);
}
}
}
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