com.alibaba.nacos.common.packagescan.resource.PathMatchingResourcePatternResolver Maven / Gradle / Ivy
/*
* Copyright 2002-2020 the original author or authors.
*
* 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
*
* https://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.alibaba.nacos.common.packagescan.resource;
import com.alibaba.nacos.common.packagescan.util.PathMatcher;
import com.alibaba.nacos.common.packagescan.util.ResourceUtils;
import com.alibaba.nacos.common.packagescan.util.AbstractAssert;
import com.alibaba.nacos.common.utils.ClassUtils;
import com.alibaba.nacos.common.utils.ReflectUtils;
import com.alibaba.nacos.common.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLConnection;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.zip.ZipException;
/**
* Copy from https://github.com/spring-projects/spring-framework.git, with less modifications
* A {@link ResourcePatternResolver} implementation that is able to resolve a
* specified resource location path into one or more matching Resources.
* The source path may be a simple path which has a one-to-one mapping to a
* target {@link Resource}, or alternatively
* may contain the special "{@code classpath*:}" prefix and/or
* internal Ant-style regular expressions (matched using Spring's
* {@link AntPathMatcher} utility).
* Both of the latter are effectively wildcards.
*
* No Wildcards:
*
*
In the simple case, if the specified location path does not start with the
* {@code "classpath*:}" prefix, and does not contain a PathMatcher pattern,
* this resolver will simply return a single resource via a
* {@code getResource()} call on the underlying {@code ResourceLoader}.
* Examples are real URLs such as "{@code file:C:/context.xml}", pseudo-URLs
* such as "{@code classpath:/context.xml}", and simple unprefixed paths
* such as "{@code /WEB-INF/context.xml}". The latter will resolve in a
* fashion specific to the underlying {@code ResourceLoader} (e.g.
* {@code ServletContextResource} for a {@code WebApplicationContext}).
*
*
Ant-style Patterns:
*
*
When the path location contains an Ant-style pattern, e.g.:
*
* /WEB-INF/*-context.xml
* com/mycompany/**/applicationContext.xml
* file:C:/some/path/*-context.xml
* classpath:com/mycompany/**/applicationContext.xml
* the resolver follows a more complex but defined procedure to try to resolve
* the wildcard. It produces a {@code Resource} for the path up to the last
* non-wildcard segment and obtains a {@code URL} from it. If this URL is
* not a "{@code jar:}" URL or container-specific variant (e.g.
* "{@code zip:}" in WebLogic, "{@code wsjar}" in WebSphere", etc.),
* then a {@code java.io.File} is obtained from it, and used to resolve the
* wildcard by walking the filesystem. In the case of a jar URL, the resolver
* either gets a {@code java.net.JarURLConnection} from it, or manually parses
* the jar URL, and then traverses the contents of the jar file, to resolve the
* wildcards.
*
* Implications on portability:
*
*
If the specified path is already a file URL (either explicitly, or
* implicitly because the base {@code ResourceLoader} is a filesystem one,
* then wildcarding is guaranteed to work in a completely portable fashion.
*
*
If the specified path is a classpath location, then the resolver must
* obtain the last non-wildcard path segment URL via a
* {@code Classloader.getResource()} call. Since this is just a
* node of the path (not the file at the end) it is actually undefined
* (in the ClassLoader Javadocs) exactly what sort of a URL is returned in
* this case. In practice, it is usually a {@code java.io.File} representing
* the directory, where the classpath resource resolves to a filesystem
* location, or a jar URL of some sort, where the classpath resource resolves
* to a jar location. Still, there is a portability concern on this operation.
*
*
If a jar URL is obtained for the last non-wildcard segment, the resolver
* must be able to get a {@code java.net.JarURLConnection} from it, or
* manually parse the jar URL, to be able to walk the contents of the jar,
* and resolve the wildcard. This will work in most environments, but will
* fail in others, and it is strongly recommended that the wildcard
* resolution of resources coming from jars be thoroughly tested in your
* specific environment before you rely on it.
*
*
{@code classpath*:} Prefix:
*
*
There is special support for retrieving multiple class path resources with
* the same name, via the "{@code classpath*:}" prefix. For example,
* "{@code classpath*:META-INF/beans.xml}" will find all "beans.xml"
* files in the class path, be it in "classes" directories or in JAR files.
* This is particularly useful for autodetecting config files of the same name
* at the same location within each jar file. Internally, this happens via a
* {@code ClassLoader.getResources()} call, and is completely portable.
*
*
The "classpath*:" prefix can also be combined with a PathMatcher pattern in
* the rest of the location path, for example "classpath*:META-INF/*-beans.xml".
* In this case, the resolution strategy is fairly simple: a
* {@code ClassLoader.getResources()} call is used on the last non-wildcard
* path segment to get all the matching resources in the class loader hierarchy,
* and then off each resource the same PathMatcher resolution strategy described
* above is used for the wildcard subpath.
*
*
Other notes:
*
*
WARNING: Note that "{@code classpath*:}" when combined with
* Ant-style patterns will only work reliably with at least one root directory
* before the pattern starts, unless the actual target files reside in the file
* system. This means that a pattern like "{@code classpath*:*.xml}" will
* not retrieve files from the root of jar files but rather only from the
* root of expanded directories. This originates from a limitation in the JDK's
* {@code ClassLoader.getResources()} method which only returns file system
* locations for a passed-in empty String (indicating potential roots to search).
* This {@code ResourcePatternResolver} implementation is trying to mitigate the
* jar root lookup limitation through {@link URLClassLoader} introspection and
* "java.class.path" manifest evaluation; however, without portability guarantees.
*
*
WARNING: Ant-style patterns with "classpath:" resources are not
* guaranteed to find matching resources if the root package to search is available
* in multiple class path locations. This is because a resource such as
*
* com/mycompany/package1/service-context.xml
*
* may be in only one location, but when a path such as
*
* classpath:com/mycompany/**/service-context.xml
*
* is used to try to resolve it, the resolver will work off the (first) URL
* returned by {@code getResource("com/mycompany");}. If this base package node
* exists in multiple classloader locations, the actual end resource may not be
* underneath. Therefore, preferably, use "{@code classpath*:}" with the same
* Ant-style pattern in such a case, which will search all class path
* locations that contain the root package.
*
* @author Juergen Hoeller
* @author Colin Sampaleanu
* @author Marius Bogoevici
* @author Costin Leau
* @author Phillip Webb
* @see #CLASSPATH_ALL_URL_PREFIX
* @see AntPathMatcher
* @see ResourceLoader#getResource(String)
* @see ClassLoader#getResources(String)
* @since 1.0.2
*/
public class PathMatchingResourcePatternResolver implements ResourcePatternResolver {
private static final Logger LOGGER = LoggerFactory.getLogger(PathMatchingResourcePatternResolver.class);
private static Method equinoxResolveMethod;
static {
try {
// Detect Equinox OSGi (e.g. on WebSphere 6.1)
Class fileLocatorClass = ClassUtils.forName("org.eclipse.core.runtime.FileLocator",
PathMatchingResourcePatternResolver.class.getClassLoader());
equinoxResolveMethod = fileLocatorClass.getMethod("resolve", URL.class);
LOGGER.trace("Found Equinox FileLocator for OSGi bundle URL resolution");
} catch (Throwable ex) {
equinoxResolveMethod = null;
}
}
private final ResourceLoader resourceLoader;
private PathMatcher pathMatcher = new AntPathMatcher();
/**
* Create a new PathMatchingResourcePatternResolver with a DefaultResourceLoader.
*
* ClassLoader access will happen via the thread context class loader.
*
* @see DefaultResourceLoader
*/
public PathMatchingResourcePatternResolver() {
this.resourceLoader = new DefaultResourceLoader();
}
/**
* Create a new PathMatchingResourcePatternResolver.
*
*
ClassLoader access will happen via the thread context class loader.
*
* @param resourceLoader the ResourceLoader to load root directories and
* actual resources with
*/
public PathMatchingResourcePatternResolver(ResourceLoader resourceLoader) {
AbstractAssert.notNull(resourceLoader, "ResourceLoader must not be null");
this.resourceLoader = resourceLoader;
}
/**
* Create a new PathMatchingResourcePatternResolver with a DefaultResourceLoader.
*
* @param classLoader the ClassLoader to load classpath resources with,
* or {@code null} for using the thread context class loader
* at the time of actual resource access
* @see DefaultResourceLoader
*/
public PathMatchingResourcePatternResolver(ClassLoader classLoader) {
this.resourceLoader = new DefaultResourceLoader(classLoader);
}
/**
* Return the ResourceLoader that this pattern resolver works with.
*/
public ResourceLoader getResourceLoader() {
return this.resourceLoader;
}
@Override
public ClassLoader getClassLoader() {
return getResourceLoader().getClassLoader();
}
/**
* Set the PathMatcher implementation to use for this
* resource pattern resolver. Default is AntPathMatcher.
*
* @see AntPathMatcher
*/
public void setPathMatcher(PathMatcher pathMatcher) {
AbstractAssert.notNull(pathMatcher, "PathMatcher must not be null");
this.pathMatcher = pathMatcher;
}
/**
* Return the PathMatcher that this resource pattern resolver uses.
*/
public PathMatcher getPathMatcher() {
return this.pathMatcher;
}
@Override
public Resource getResource(String location) {
return getResourceLoader().getResource(location);
}
@Override
public Resource[] getResources(String locationPattern) throws IOException {
AbstractAssert.notNull(locationPattern, "Location pattern must not be null");
if (locationPattern.startsWith(CLASSPATH_ALL_URL_PREFIX)) {
// a class path resource (multiple resources for same name possible)
if (getPathMatcher().isPattern(locationPattern.substring(CLASSPATH_ALL_URL_PREFIX.length()))) {
// a class path resource pattern
return findPathMatchingResources(locationPattern);
} else {
// all class path resources with the given name
return findAllClassPathResources(locationPattern.substring(CLASSPATH_ALL_URL_PREFIX.length()));
}
} else {
// Generally only look for a pattern after a prefix here,
// and on Tomcat only after the "*/" separator for its "war:" protocol.
int prefixEnd = (locationPattern.startsWith("war:") ? locationPattern.indexOf("*/") + 1 :
locationPattern.indexOf(':') + 1);
if (getPathMatcher().isPattern(locationPattern.substring(prefixEnd))) {
// a file pattern
return findPathMatchingResources(locationPattern);
} else {
// a single resource with the given name
return new Resource[]{getResourceLoader().getResource(locationPattern)};
}
}
}
/**
* Find all class location resources with the given location via the ClassLoader.
* Delegates to {@link #doFindAllClassPathResources(String)}.
*
* @param location the absolute path within the classpath
* @return the result as Resource array
* @throws IOException in case of I/O errors
* @see ClassLoader#getResources
* @see #convertClassLoaderUrl
*/
protected Resource[] findAllClassPathResources(String location) throws IOException {
String path = location;
if (path.startsWith("/")) {
path = path.substring(1);
}
Set result = doFindAllClassPathResources(path);
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Resolved classpath location [" + location + "] to resources " + result);
}
return result.toArray(new Resource[0]);
}
/**
* Find all class location resources with the given path via the ClassLoader.
* Called by {@link #findAllClassPathResources(String)}.
*
* @param path the absolute path within the classpath (never a leading slash)
* @return a mutable Set of matching Resource instances
* @since 4.1.1
*/
protected Set doFindAllClassPathResources(String path) throws IOException {
Set result = new LinkedHashSet<>(16);
ClassLoader cl = getClassLoader();
Enumeration resourceUrls = (cl != null ? cl.getResources(path) : ClassLoader.getSystemResources(path));
while (resourceUrls.hasMoreElements()) {
URL url = resourceUrls.nextElement();
result.add(convertClassLoaderUrl(url));
}
if (!StringUtils.hasLength(path)) {
// The above result is likely to be incomplete, i.e. only containing file system references.
// We need to have pointers to each of the jar files on the classpath as well...
addAllClassLoaderJarRoots(cl, result);
}
return result;
}
/**
* Convert the given URL as returned from the ClassLoader into a {@link Resource}.
*
* The default implementation simply creates a {@link UrlResource} instance.
*
* @param url a URL as returned from the ClassLoader
* @return the corresponding Resource object
* @see ClassLoader#getResources
* @see Resource
*/
protected Resource convertClassLoaderUrl(URL url) {
return new UrlResource(url);
}
/**
* Search all {@link URLClassLoader} URLs for jar file references and add them to the
* given set of resources in the form of pointers to the root of the jar file content.
*
* @param classLoader the ClassLoader to search (including its ancestors)
* @param result the set of resources to add jar roots to
* @since 4.1.1
*/
protected void addAllClassLoaderJarRoots(ClassLoader classLoader, Set result) {
if (classLoader instanceof URLClassLoader) {
try {
for (URL url : ((URLClassLoader) classLoader).getURLs()) {
try {
UrlResource jarResource = (ResourceUtils.URL_PROTOCOL_JAR.equals(url.getProtocol())
? new UrlResource(url) :
new UrlResource(ResourceUtils.JAR_URL_PREFIX + url + ResourceUtils.JAR_URL_SEPARATOR));
if (jarResource.exists()) {
result.add(jarResource);
}
} catch (MalformedURLException ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cannot search for matching files underneath [" + url
+ "] because it cannot be converted to a valid 'jar:' URL: " + ex.getMessage());
}
}
}
} catch (Exception ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cannot introspect jar files since ClassLoader [" + classLoader
+ "] does not support 'getURLs()': " + ex);
}
}
}
if (classLoader == ClassLoader.getSystemClassLoader()) {
// "java.class.path" manifest evaluation...
addClassPathManifestEntries(result);
}
if (classLoader != null) {
try {
// Hierarchy traversal...
addAllClassLoaderJarRoots(classLoader.getParent(), result);
} catch (Exception ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cannot introspect jar files in parent ClassLoader since [" + classLoader
+ "] does not support 'getParent()': " + ex);
}
}
}
}
/**
* Determine jar file references from the "java.class.path." manifest property and add them
* to the given set of resources in the form of pointers to the root of the jar file content.
*
* @param result the set of resources to add jar roots to
* @since 4.3
*/
protected void addClassPathManifestEntries(Set result) {
try {
String javaClassPathProperty = System.getProperty("java.class.path");
for (String path : StringUtils.delimitedListToStringArray(
javaClassPathProperty, System.getProperty("path.separator"))) {
try {
String filePath = new File(path).getAbsolutePath();
int prefixIndex = filePath.indexOf(':');
if (prefixIndex == 1) {
// Possibly "c:" drive prefix on Windows, to be upper-cased for proper duplicate detection
filePath = StringUtils.capitalize(filePath);
}
// # can appear in directories/filenames, java.net.URL should not treat it as a fragment
filePath = StringUtils.replace(filePath, "#", "%23");
// Build URL that points to the root of the jar file
UrlResource jarResource = new UrlResource(ResourceUtils.JAR_URL_PREFIX
+ ResourceUtils.FILE_URL_PREFIX + filePath + ResourceUtils.JAR_URL_SEPARATOR);
// Potentially overlapping with URLClassLoader.getURLs() result above!
if (!result.contains(jarResource) && !hasDuplicate(filePath, result) && jarResource.exists()) {
result.add(jarResource);
}
} catch (MalformedURLException ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cannot search for matching files underneath [" + path
+ "] because it cannot be converted to a valid 'jar:' URL: " + ex.getMessage());
}
}
}
} catch (Exception ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Failed to evaluate 'java.class.path' manifest entries: " + ex);
}
}
}
/**
* Check whether the given file path has a duplicate but differently structured entry
* in the existing result, i.e. with or without a leading slash.
*
* @param filePath the file path (with or without a leading slash)
* @param result the current result
* @return {@code true} if there is a duplicate (i.e. to ignore the given file path),
* {@code false} to proceed with adding a corresponding resource to the current result
*/
private boolean hasDuplicate(String filePath, Set result) {
if (result.isEmpty()) {
return false;
}
String duplicatePath = (filePath.startsWith("/") ? filePath.substring(1) : "/" + filePath);
try {
return result.contains(new UrlResource(ResourceUtils.JAR_URL_PREFIX + ResourceUtils.FILE_URL_PREFIX
+ duplicatePath + ResourceUtils.JAR_URL_SEPARATOR));
} catch (MalformedURLException ex) {
// Ignore: just for testing against duplicate.
return false;
}
}
/**
* Find all resources that match the given location pattern via the
* Ant-style PathMatcher. Supports resources in jar files and zip files
* and in the file system.
*
* @param locationPattern the location pattern to match
* @return the result as Resource array
* @throws IOException in case of I/O errors
* @see #doFindPathMatchingJarResources
* @see #doFindPathMatchingFileResources
* @see PathMatcher
*/
protected Resource[] findPathMatchingResources(String locationPattern) throws IOException {
String rootDirPath = determineRootDir(locationPattern);
String subPattern = locationPattern.substring(rootDirPath.length());
Resource[] rootDirResources = getResources(rootDirPath);
Set result = new LinkedHashSet<>(16);
for (Resource rootDirResource : rootDirResources) {
rootDirResource = resolveRootDirResource(rootDirResource);
URL rootDirUrl = rootDirResource.getUrl();
if (equinoxResolveMethod != null && rootDirUrl.getProtocol().startsWith("bundle")) {
URL resolvedUrl = (URL) ReflectUtils.invokeMethod(equinoxResolveMethod, null, rootDirUrl);
if (resolvedUrl != null) {
rootDirUrl = resolvedUrl;
}
rootDirResource = new UrlResource(rootDirUrl);
}
if (rootDirUrl.getProtocol().startsWith(ResourceUtils.URL_PROTOCOL_VFS)) {
result.addAll(VfsResourceMatchingDelegate.findMatchingResources(rootDirUrl, subPattern, getPathMatcher()));
} else if (ResourceUtils.isJarUrl(rootDirUrl) || isJarResource(rootDirResource)) {
result.addAll(doFindPathMatchingJarResources(rootDirResource, rootDirUrl, subPattern));
} else {
result.addAll(doFindPathMatchingFileResources(rootDirResource, subPattern));
}
}
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Resolved location pattern [" + locationPattern + "] to resources " + result);
}
return result.toArray(new Resource[0]);
}
/**
* Determine the root directory for the given location.
*
* Used for determining the starting point for file matching,
* resolving the root directory location to a {@code java.io.File}
* and passing it into {@code retrieveMatchingFiles}, with the
* remainder of the location as pattern.
*
*
Will return "/WEB-INF/" for the pattern "/WEB-INF/*.xml",
* for example.
*
* @param location the location to check
* @return the part of the location that denotes the root directory
* @see #retrieveMatchingFiles
*/
protected String determineRootDir(String location) {
int prefixEnd = location.indexOf(':') + 1;
int rootDirEnd = location.length();
while (rootDirEnd > prefixEnd && getPathMatcher().isPattern(location.substring(prefixEnd, rootDirEnd))) {
rootDirEnd = location.lastIndexOf('/', rootDirEnd - 2) + 1;
}
if (rootDirEnd == 0) {
rootDirEnd = prefixEnd;
}
return location.substring(0, rootDirEnd);
}
/**
* Resolve the specified resource for path matching.
*
*
By default, Equinox OSGi "bundleresource:" / "bundleentry:" URL will be
* resolved into a standard jar file URL that be traversed using Spring's
* standard jar file traversal algorithm. For any preceding custom resolution,
* override this method and replace the resource handle accordingly.
*
* @param original the resource to resolve
* @return the resolved resource (may be identical to the passed-in resource)
* @throws IOException in case of resolution failure
*/
protected Resource resolveRootDirResource(Resource original) throws IOException {
return original;
}
/**
* Return whether the given resource handle indicates a jar resource
* that the {@code doFindPathMatchingJarResources} method can handle.
*
*
By default, the URL protocols "jar", "zip", "vfszip and "wsjar"
* will be treated as jar resources. This template method allows for
* detecting further kinds of jar-like resources, e.g. through
* {@code instanceof} checks on the resource handle type.
*
* @param resource the resource handle to check
* (usually the root directory to start path matching from)
* @see #doFindPathMatchingJarResources
* @see ResourceUtils#isJarUrl
*/
protected boolean isJarResource(Resource resource) throws IOException {
return false;
}
/**
* Find all resources in jar files that match the given location pattern
* via the Ant-style PathMatcher.
*
* @param rootDirResource the root directory as Resource
* @param rootDirUrl the pre-resolved root directory URL
* @param subPattern the sub pattern to match (below the root directory)
* @return a mutable Set of matching Resource instances
* @throws IOException in case of I/O errors
* @see PathMatcher
* @since 4.3
*/
protected Set doFindPathMatchingJarResources(Resource rootDirResource, URL rootDirUrl, String subPattern)
throws IOException {
URLConnection con = rootDirUrl.openConnection();
JarFile jarFile;
String jarFileUrl;
String rootEntryPath;
boolean closeJarFile;
if (con instanceof JarURLConnection) {
// Should usually be the case for traditional JAR files.
JarURLConnection jarCon = (JarURLConnection) con;
ResourceUtils.useCachesIfNecessary(jarCon);
jarFile = jarCon.getJarFile();
jarFileUrl = jarCon.getJarFileURL().toExternalForm();
JarEntry jarEntry = jarCon.getJarEntry();
rootEntryPath = (jarEntry != null ? jarEntry.getName() : "");
closeJarFile = !jarCon.getUseCaches();
} else {
// No JarURLConnection -> need to resort to URL file parsing.
// We'll assume URLs of the format "jar:path!/entry", with the protocol
// being arbitrary as long as following the entry format.
// We'll also handle paths with and without leading "file:" prefix.
String urlFile = rootDirUrl.getFile();
try {
int separatorIndex = urlFile.indexOf(ResourceUtils.WAR_URL_SEPARATOR);
if (separatorIndex == -1) {
separatorIndex = urlFile.indexOf(ResourceUtils.JAR_URL_SEPARATOR);
}
if (separatorIndex != -1) {
jarFileUrl = urlFile.substring(0, separatorIndex);
rootEntryPath = urlFile.substring(separatorIndex + 2); // both separators are 2 chars
jarFile = getJarFile(jarFileUrl);
} else {
jarFile = new JarFile(urlFile);
jarFileUrl = urlFile;
rootEntryPath = "";
}
closeJarFile = true;
} catch (ZipException ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Skipping invalid jar classpath entry [" + urlFile + "]");
}
return Collections.emptySet();
}
}
try {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Looking for matching resources in jar file [" + jarFileUrl + "]");
}
if (StringUtils.hasLength(rootEntryPath) && !rootEntryPath.endsWith("/")) {
// Root entry path must end with slash to allow for proper matching.
// The Sun JRE does not return a slash here, but BEA JRockit does.
rootEntryPath = rootEntryPath + "/";
}
Set result = new LinkedHashSet<>(8);
for (Enumeration entries = jarFile.entries(); entries.hasMoreElements(); ) {
JarEntry entry = entries.nextElement();
String entryPath = entry.getName();
if (entryPath.startsWith(rootEntryPath)) {
String relativePath = entryPath.substring(rootEntryPath.length());
if (getPathMatcher().match(subPattern, relativePath)) {
result.add(rootDirResource.createRelative(relativePath));
}
}
}
return result;
} finally {
if (closeJarFile) {
jarFile.close();
}
}
}
/**
* Resolve the given jar file URL into a JarFile object.
*/
protected JarFile getJarFile(String jarFileUrl) throws IOException {
if (jarFileUrl.startsWith(ResourceUtils.FILE_URL_PREFIX)) {
try {
return new JarFile(ResourceUtils.toUri(jarFileUrl).getSchemeSpecificPart());
} catch (URISyntaxException ex) {
// Fallback for URLs that are not valid URIs (should hardly ever happen).
return new JarFile(jarFileUrl.substring(ResourceUtils.FILE_URL_PREFIX.length()));
}
} else {
return new JarFile(jarFileUrl);
}
}
/**
* Find all resources in the file system that match the given location pattern
* via the Ant-style PathMatcher.
*
* @param rootDirResource the root directory as Resource
* @param subPattern the sub pattern to match (below the root directory)
* @return a mutable Set of matching Resource instances
* @throws IOException in case of I/O errors
* @see #retrieveMatchingFiles
* @see PathMatcher
*/
protected Set doFindPathMatchingFileResources(Resource rootDirResource, String subPattern)
throws IOException {
File rootDir;
try {
rootDir = rootDirResource.getFile().getAbsoluteFile();
} catch (FileNotFoundException ex) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cannot search for matching files underneath " + rootDirResource
+ " in the file system: " + ex.getMessage());
}
return Collections.emptySet();
} catch (Exception ex) {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Failed to resolve " + rootDirResource + " in the file system: " + ex);
}
return Collections.emptySet();
}
return doFindMatchingFileSystemResources(rootDir, subPattern);
}
/**
* Find all resources in the file system that match the given location pattern
* via the Ant-style PathMatcher.
*
* @param rootDir the root directory in the file system
* @param subPattern the sub pattern to match (below the root directory)
* @return a mutable Set of matching Resource instances
* @throws IOException in case of I/O errors
* @see #retrieveMatchingFiles
* @see PathMatcher
*/
protected Set doFindMatchingFileSystemResources(File rootDir, String subPattern) throws IOException {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Looking for matching resources in directory tree [" + rootDir.getPath() + "]");
}
Set matchingFiles = retrieveMatchingFiles(rootDir, subPattern);
Set result = new LinkedHashSet<>(matchingFiles.size());
for (File file : matchingFiles) {
result.add(new FileSystemResource(file));
}
return result;
}
/**
* Retrieve files that match the given path pattern,
* checking the given directory and its subdirectories.
*
* @param rootDir the directory to start from
* @param pattern the pattern to match against,
* relative to the root directory
* @return a mutable Set of matching Resource instances
* @throws IOException if directory contents could not be retrieved
*/
protected Set retrieveMatchingFiles(File rootDir, String pattern) throws IOException {
if (!rootDir.exists()) {
// Silently skip non-existing directories.
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Skipping [" + rootDir.getAbsolutePath() + "] because it does not exist");
}
return Collections.emptySet();
}
if (!rootDir.isDirectory()) {
// Complain louder if it exists but is no directory.
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Skipping [" + rootDir.getAbsolutePath() + "] because it does not denote a directory");
}
return Collections.emptySet();
}
if (!rootDir.canRead()) {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Skipping search for matching files underneath directory [" + rootDir.getAbsolutePath()
+ "] because the application is not allowed to read the directory");
}
return Collections.emptySet();
}
String fullPattern = StringUtils.replace(rootDir.getAbsolutePath(), File.separator, "/");
if (!pattern.startsWith("/")) {
fullPattern += "/";
}
fullPattern = fullPattern + StringUtils.replace(pattern, File.separator, "/");
Set result = new LinkedHashSet<>(8);
doRetrieveMatchingFiles(fullPattern, rootDir, result);
return result;
}
/**
* Recursively retrieve files that match the given pattern,
* adding them to the given result list.
*
* @param fullPattern the pattern to match against,
* with prepended root directory path
* @param dir the current directory
* @param result the Set of matching File instances to add to
* @throws IOException if directory contents could not be retrieved
*/
protected void doRetrieveMatchingFiles(String fullPattern, File dir, Set result) throws IOException {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Searching directory [" + dir.getAbsolutePath()
+ "] for files matching pattern [" + fullPattern + "]");
}
for (File content : listDirectory(dir)) {
String currPath = StringUtils.replace(content.getAbsolutePath(), File.separator, "/");
if (content.isDirectory() && getPathMatcher().matchStart(fullPattern, currPath + "/")) {
if (!content.canRead()) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Skipping subdirectory [" + dir.getAbsolutePath()
+ "] because the application is not allowed to read the directory");
}
} else {
doRetrieveMatchingFiles(fullPattern, content, result);
}
}
if (getPathMatcher().match(fullPattern, currPath)) {
result.add(content);
}
}
}
/**
* Determine a sorted list of files in the given directory.
*
* @param dir the directory to introspect
* @return the sorted list of files (by default in alphabetical order)
* @see File#listFiles()
* @since 5.1
*/
protected File[] listDirectory(File dir) {
File[] files = dir.listFiles();
if (files == null) {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Could not retrieve contents of directory [" + dir.getAbsolutePath() + "]");
}
return new File[0];
}
Arrays.sort(files, Comparator.comparing(File::getName));
return files;
}
/**
* Inner delegate class, avoiding a hard JBoss VFS API dependency at runtime.
*/
private static class VfsResourceMatchingDelegate {
public static Set findMatchingResources(
URL rootDirUrl, String locationPattern, PathMatcher pathMatcher) throws IOException {
Object root = VfsPatternUtils.findRoot(rootDirUrl);
PatternVirtualFileVisitor visitor =
new PatternVirtualFileVisitor(VfsPatternUtils.getPath(root), locationPattern, pathMatcher);
VfsPatternUtils.visit(root, visitor);
return visitor.getResources();
}
}
/**
* VFS visitor for path matching purposes.
*/
@SuppressWarnings("unused")
private static class PatternVirtualFileVisitor implements InvocationHandler {
private final String subPattern;
private final PathMatcher pathMatcher;
private final String rootPath;
private final Set resources = new LinkedHashSet<>();
public PatternVirtualFileVisitor(String rootPath, String subPattern, PathMatcher pathMatcher) {
this.subPattern = subPattern;
this.pathMatcher = pathMatcher;
this.rootPath = (rootPath.isEmpty() || rootPath.endsWith("/") ? rootPath : rootPath + "/");
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
String methodName = method.getName();
if (Object.class == method.getDeclaringClass()) {
if ("equals".equals(methodName)) {
// Only consider equal when proxies are identical.
return (proxy == args[0]);
} else if ("hashCode".equals(methodName)) {
return System.identityHashCode(proxy);
}
} else if ("getAttributes".equals(methodName)) {
return getAttributes();
} else if ("visit".equals(methodName)) {
visit(args[0]);
return null;
} else if ("toString".equals(methodName)) {
return toString();
}
throw new IllegalStateException("Unexpected method invocation: " + method);
}
public void visit(Object vfsResource) {
if (this.pathMatcher.match(this.subPattern,
VfsPatternUtils.getPath(vfsResource).substring(this.rootPath.length()))) {
this.resources.add(new VfsResource(vfsResource));
}
}
public Object getAttributes() {
return VfsPatternUtils.getVisitorAttributes();
}
public Set getResources() {
return this.resources;
}
public int size() {
return this.resources.size();
}
@Override
public String toString() {
return "sub-pattern: " + this.subPattern + ", resources: " + this.resources;
}
}
}