Use xlib guava to restore Minecraft 1.7 compat
This commit is contained in:
Olof Larsson
parent
7babdf910c
commit
5a380503e0
@ -4,7 +4,8 @@ import com.massivecraft.massivecore.collections.MassiveList;
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import com.massivecraft.massivecore.comparator.ComparatorNaturalOrder;
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import com.massivecraft.massivecore.predicate.Predicate;
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import com.massivecraft.massivecore.predicate.PredicateAnd;
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import com.massivecraft.massivecore.util.XClassPath.XClassInfo;
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import com.massivecraft.massivecore.xlib.guava.reflect.ClassPath;
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import com.massivecraft.massivecore.xlib.guava.reflect.ClassPath.ClassInfo;
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import org.bukkit.Bukkit;
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import java.io.IOException;
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@ -457,12 +458,12 @@ public class ReflectionUtil
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try
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{
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// Get info
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XClassPath classPath = XClassPath.from(classLoader);
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ClassPath classPath = ClassPath.from(classLoader);
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Predicate<Class<?>> predicateCombined = PredicateAnd.get(predicates);
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Collection<XClassInfo> classInfos = recursive ? classPath.getTopLevelClassesRecursive(packageName) : classPath.getTopLevelClasses(packageName);
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Collection<ClassInfo> classInfos = recursive ? classPath.getTopLevelClassesRecursive(packageName) : classPath.getTopLevelClasses(packageName);
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for (XClassInfo classInfo : classInfos)
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for (ClassInfo classInfo : classInfos)
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{
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// Get name of class
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String className = classInfo.getName();
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@ -1,558 +0,0 @@
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/*
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* Copyright (C) 2012 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.massivecraft.massivecore.util;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.base.Preconditions.checkNotNull;
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import com.google.common.annotations.Beta;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.CharMatcher;
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import com.google.common.base.Predicate;
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import com.google.common.base.Splitter;
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import com.google.common.collect.FluentIterable;
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import com.google.common.collect.ImmutableMap;
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import com.google.common.collect.ImmutableSet;
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import com.google.common.collect.Maps;
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import com.google.common.collect.MultimapBuilder;
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import com.google.common.collect.SetMultimap;
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import com.google.common.collect.Sets;
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import com.google.common.io.ByteSource;
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import com.google.common.io.CharSource;
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import com.google.common.io.Resources;
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import com.google.common.reflect.Reflection;
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import java.io.File;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.charset.Charset;
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import java.util.Enumeration;
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import java.util.HashSet;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.NoSuchElementException;
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import java.util.Set;
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import java.util.jar.Attributes;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import java.util.jar.Manifest;
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import java.util.logging.Logger;
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/**
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* NOTE:
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* This class was copied from: https://github.com/google/guava/blob/7c11b8d9220b710d5598b774e22cc774f68f40e7/guava/src/com/google/common/reflect/ClassPath.java
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* So that we could get the benefits of an important bug fix in Guava 22 releated to spaces.
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* https://github.com/MassiveCraft/MassiveCore/issues/307
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* Once Spigot updates to Guava 22 we are good to go again.
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*
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* Scans the source of a {@link ClassLoader} and finds all loadable classes and resources.
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*
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* <p><b>Warning:</b> Currently only {@link URLClassLoader} and only {@code file://} urls are
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* supported.
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*
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* <p>In the case of directory classloaders, symlinks are supported but cycles are not traversed.
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* This guarantees discovery of each <em>unique</em> loadable resource. However, not all possible
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* aliases for resources on cyclic paths will be listed.
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*
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* @author Ben Yu
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* @since 14.0
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*/
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@Beta
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public final class XClassPath {
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private static final Logger logger = Logger.getLogger(XClassPath.class.getName());
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private static final Predicate<XClassInfo> IS_TOP_LEVEL =
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new Predicate<XClassInfo>() {
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@Override
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public boolean apply(XClassInfo info) {
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return info.className.indexOf('$') == -1;
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}
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@Override
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public boolean test(XClassInfo info)
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{
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return this.apply(info);
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}
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};
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/** Separator for the Class-Path manifest attribute value in jar files. */
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private static final Splitter CLASS_PATH_ATTRIBUTE_SEPARATOR =
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Splitter.on(" ").omitEmptyStrings();
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private static final String CLASS_FILE_NAME_EXTENSION = ".class";
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private final ImmutableSet<ResourceInfo> resources;
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private XClassPath(ImmutableSet<ResourceInfo> resources) {
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this.resources = resources;
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}
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/**
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* Returns a {@code XClassPath} representing all classes and resources loadable from {@code
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* classloader} and its parent class loaders.
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*
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* <p><b>Warning:</b> Currently only {@link URLClassLoader} and only {@code file://} urls are
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* supported.
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*
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* @throws IOException if the attempt to read class path resources (jar files or directories)
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* failed.
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*/
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public static XClassPath from(ClassLoader classloader) throws IOException {
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DefaultScanner scanner = new DefaultScanner();
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scanner.scan(classloader);
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return new XClassPath(scanner.getResources());
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}
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/**
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* Returns all resources loadable from the current class path, including the class files of all
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* loadable classes but excluding the "META-INF/MANIFEST.MF" file.
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*/
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public ImmutableSet<ResourceInfo> getResources() {
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return resources;
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}
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/**
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* Returns all classes loadable from the current class path.
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*
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* @since 16.0
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*/
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public ImmutableSet<XClassInfo> getAllClasses() {
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return FluentIterable.from(resources).filter(XClassInfo.class).toSet();
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}
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/** Returns all top level classes loadable from the current class path. */
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public ImmutableSet<XClassInfo> getTopLevelClasses() {
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return FluentIterable.from(resources).filter(XClassInfo.class).filter(IS_TOP_LEVEL).toSet();
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}
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/** Returns all top level classes whose package name is {@code packageName}. */
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public ImmutableSet<XClassInfo> getTopLevelClasses(String packageName) {
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checkNotNull(packageName);
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ImmutableSet.Builder<XClassInfo> builder = ImmutableSet.builder();
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for (XClassInfo classInfo : getTopLevelClasses()) {
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if (classInfo.getPackageName().equals(packageName)) {
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builder.add(classInfo);
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}
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}
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return builder.build();
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}
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/**
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* Returns all top level classes whose package name is {@code packageName} or starts with
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* {@code packageName} followed by a '.'.
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*/
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public ImmutableSet<XClassInfo> getTopLevelClassesRecursive(String packageName) {
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checkNotNull(packageName);
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String packagePrefix = packageName + '.';
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ImmutableSet.Builder<XClassInfo> builder = ImmutableSet.builder();
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for (XClassInfo classInfo : getTopLevelClasses()) {
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if (classInfo.getName().startsWith(packagePrefix)) {
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builder.add(classInfo);
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}
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}
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return builder.build();
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}
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/**
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* Represents a class path resource that can be either a class file or any other resource file
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* loadable from the class path.
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*
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* @since 14.0
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*/
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@Beta
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public static class ResourceInfo {
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private final String resourceName;
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final ClassLoader loader;
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static ResourceInfo of(String resourceName, ClassLoader loader) {
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if (resourceName.endsWith(CLASS_FILE_NAME_EXTENSION)) {
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return new XClassInfo(resourceName, loader);
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} else {
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return new ResourceInfo(resourceName, loader);
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}
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}
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ResourceInfo(String resourceName, ClassLoader loader) {
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this.resourceName = checkNotNull(resourceName);
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this.loader = checkNotNull(loader);
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}
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/**
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* Returns the url identifying the resource.
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*
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* <p>See {@link ClassLoader#getResource}
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*
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* @throws NoSuchElementException if the resource cannot be loaded through the class loader,
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* despite physically existing in the class path.
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*/
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public final URL url() {
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URL url = loader.getResource(resourceName);
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if (url == null) {
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throw new NoSuchElementException(resourceName);
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}
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return url;
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}
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/**
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* Returns a {@link ByteSource} view of the resource from which its bytes can be read.
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*
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* @throws NoSuchElementException if the resource cannot be loaded through the class loader,
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* despite physically existing in the class path.
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* @since 20.0
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*/
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public final ByteSource asByteSource() {
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return Resources.asByteSource(url());
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}
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/**
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* Returns a {@link CharSource} view of the resource from which its bytes can be read as
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* characters decoded with the given {@code charset}.
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*
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* @throws NoSuchElementException if the resource cannot be loaded through the class loader,
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* despite physically existing in the class path.
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* @since 20.0
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*/
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public final CharSource asCharSource(Charset charset) {
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return Resources.asCharSource(url(), charset);
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}
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/** Returns the fully qualified name of the resource. Such as "com/mycomp/foo/bar.txt". */
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public final String getResourceName() {
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return resourceName;
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}
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@Override
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public int hashCode() {
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return resourceName.hashCode();
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}
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@Override
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public boolean equals(Object obj) {
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if (obj instanceof ResourceInfo) {
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ResourceInfo that = (ResourceInfo) obj;
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return resourceName.equals(that.resourceName) && loader == that.loader;
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}
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return false;
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}
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// Do not change this arbitrarily. We rely on it for sorting ResourceInfo.
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@Override
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public String toString() {
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return resourceName;
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}
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}
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/**
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* Represents a class that can be loaded through {@link #load}.
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*
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* @since 14.0
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*/
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@Beta
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public static final class XClassInfo extends ResourceInfo {
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private final String className;
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XClassInfo(String resourceName, ClassLoader loader) {
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super(resourceName, loader);
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this.className = getClassName(resourceName);
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}
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/**
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* Returns the package name of the class, without attempting to load the class.
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*
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* <p>Behaves identically to {@link Package#getName()} but does not require the class (or
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* package) to be loaded.
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*/
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public String getPackageName() {
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return Reflection.getPackageName(className);
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}
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/**
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* Returns the simple name of the underlying class as given in the source code.
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*
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* <p>Behaves identically to {@link Class#getSimpleName()} but does not require the class to be
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* loaded.
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*/
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public String getSimpleName() {
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int lastDollarSign = className.lastIndexOf('$');
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if (lastDollarSign != -1) {
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String innerClassName = className.substring(lastDollarSign + 1);
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// local and anonymous classes are prefixed with number (1,2,3...), anonymous classes are
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// entirely numeric whereas local classes have the user supplied name as a suffix
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return CharMatcher.digit().trimLeadingFrom(innerClassName);
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}
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String packageName = getPackageName();
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if (packageName.isEmpty()) {
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return className;
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}
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// Since this is a top level class, its simple name is always the part after package name.
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return className.substring(packageName.length() + 1);
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}
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/**
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* Returns the fully qualified name of the class.
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*
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* <p>Behaves identically to {@link Class#getName()} but does not require the class to be
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* loaded.
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*/
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public String getName() {
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return className;
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}
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/**
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* Loads (but doesn't link or initialize) the class.
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*
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* @throws LinkageError when there were errors in loading classes that this class depends on.
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* For example, {@link NoClassDefFoundError}.
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*/
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public Class<?> load() {
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try {
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return loader.loadClass(className);
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} catch (ClassNotFoundException e) {
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// Shouldn't happen, since the class name is read from the class path.
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throw new IllegalStateException(e);
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}
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}
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@Override
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public String toString() {
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return className;
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}
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}
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/**
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* Abstract class that scans through the class path represented by a {@link ClassLoader} and calls
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* {@link #scanDirectory} and {@link #scanJarFile} for directories and jar files on the class path
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* respectively.
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*/
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abstract static class Scanner {
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// We only scan each file once independent of the classloader that resource might be associated
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// with.
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private final Set<File> scannedUris = Sets.newHashSet();
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public final void scan(ClassLoader classloader) throws IOException {
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for (Map.Entry<File, ClassLoader> entry : getClassPathEntries(classloader).entrySet()) {
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scan(entry.getKey(), entry.getValue());
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}
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}
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/** Called when a directory is scanned for resource files. */
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protected abstract void scanDirectory(ClassLoader loader, File directory) throws IOException;
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/** Called when a jar file is scanned for resource entries. */
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protected abstract void scanJarFile(ClassLoader loader, JarFile file) throws IOException;
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@VisibleForTesting
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final void scan(File file, ClassLoader classloader) throws IOException {
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if (scannedUris.add(file.getCanonicalFile())) {
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scanFrom(file, classloader);
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}
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}
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private void scanFrom(File file, ClassLoader classloader) throws IOException {
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try {
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if (!file.exists()) {
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return;
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}
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} catch (SecurityException e) {
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logger.warning("Cannot access " + file + ": " + e);
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// TODO(emcmanus): consider whether to log other failure cases too.
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return;
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}
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if (file.isDirectory()) {
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scanDirectory(classloader, file);
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} else {
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scanJar(file, classloader);
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}
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}
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private void scanJar(File file, ClassLoader classloader) throws IOException {
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JarFile jarFile;
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try {
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jarFile = new JarFile(file);
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} catch (IOException e) {
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// Not a jar file
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return;
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}
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try {
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for (File path : getClassPathFromManifest(file, jarFile.getManifest())) {
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scan(path, classloader);
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}
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scanJarFile(classloader, jarFile);
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} finally {
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try {
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jarFile.close();
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} catch (IOException ignored) {
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}
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}
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}
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/**
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* Returns the class path URIs specified by the {@code Class-Path} manifest attribute, according
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* to
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* <a href="http://docs.oracle.com/javase/8/docs/technotes/guides/jar/jar.html#Main_Attributes">
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* JAR File Specification</a>. If {@code manifest} is null, it means the jar file has no
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* manifest, and an empty set will be returned.
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*/
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@VisibleForTesting
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static ImmutableSet<File> getClassPathFromManifest(File jarFile, Manifest manifest) {
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if (manifest == null) {
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return ImmutableSet.of();
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}
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ImmutableSet.Builder<File> builder = ImmutableSet.builder();
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String classpathAttribute = manifest.getMainAttributes().getValue(Attributes.Name.CLASS_PATH.toString());
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if (classpathAttribute != null) {
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for (String path : CLASS_PATH_ATTRIBUTE_SEPARATOR.split(classpathAttribute)) {
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URL url;
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try {
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url = getClassPathEntry(jarFile, path);
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} catch (MalformedURLException e) {
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// Ignore bad entry
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logger.warning("Invalid Class-Path entry: " + path);
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continue;
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}
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if (url.getProtocol().equals("file")) {
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builder.add(toFile(url));
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}
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}
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}
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return builder.build();
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}
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@VisibleForTesting
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static ImmutableMap<File, ClassLoader> getClassPathEntries(ClassLoader classloader) {
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LinkedHashMap<File, ClassLoader> entries = Maps.newLinkedHashMap();
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// Search parent first, since it's the order ClassLoader#loadClass() uses.
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ClassLoader parent = classloader.getParent();
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if (parent != null) {
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entries.putAll(getClassPathEntries(parent));
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}
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if (classloader instanceof URLClassLoader) {
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URLClassLoader urlClassLoader = (URLClassLoader) classloader;
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for (URL entry : urlClassLoader.getURLs()) {
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if (entry.getProtocol().equals("file")) {
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File file = toFile(entry);
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if (!entries.containsKey(file)) {
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entries.put(file, classloader);
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}
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}
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}
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}
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return ImmutableMap.copyOf(entries);
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}
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||||
|
||||
/**
|
||||
* Returns the absolute uri of the Class-Path entry value as specified in
|
||||
* <a href="http://docs.oracle.com/javase/8/docs/technotes/guides/jar/jar.html#Main_Attributes">
|
||||
* JAR File Specification</a>. Even though the specification only talks about relative urls,
|
||||
* absolute urls are actually supported too (for example, in Maven surefire plugin).
|
||||
*/
|
||||
@VisibleForTesting
|
||||
static URL getClassPathEntry(File jarFile, String path) throws MalformedURLException {
|
||||
return new URL(jarFile.toURI().toURL(), path);
|
||||
}
|
||||
}
|
||||
|
||||
@VisibleForTesting
|
||||
static final class DefaultScanner extends Scanner {
|
||||
private final SetMultimap<ClassLoader, String> resources =
|
||||
MultimapBuilder.hashKeys().linkedHashSetValues().build();
|
||||
|
||||
ImmutableSet<ResourceInfo> getResources() {
|
||||
ImmutableSet.Builder<ResourceInfo> builder = ImmutableSet.builder();
|
||||
for (Map.Entry<ClassLoader, String> entry : resources.entries()) {
|
||||
builder.add(ResourceInfo.of(entry.getValue(), entry.getKey()));
|
||||
}
|
||||
return builder.build();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void scanJarFile(ClassLoader classloader, JarFile file) {
|
||||
Enumeration<JarEntry> entries = file.entries();
|
||||
while (entries.hasMoreElements()) {
|
||||
JarEntry entry = entries.nextElement();
|
||||
if (entry.isDirectory() || entry.getName().equals(JarFile.MANIFEST_NAME)) {
|
||||
continue;
|
||||
}
|
||||
resources.get(classloader).add(entry.getName());
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void scanDirectory(ClassLoader classloader, File directory) throws IOException {
|
||||
Set<File> currentPath = new HashSet<File>();
|
||||
currentPath.add(directory.getCanonicalFile());
|
||||
scanDirectory(directory, classloader, "", currentPath);
|
||||
}
|
||||
|
||||
/**
|
||||
* Recursively scan the given directory, adding resources for each file encountered. Symlinks
|
||||
* which have already been traversed in the current tree path will be skipped to eliminate
|
||||
* cycles; otherwise symlinks are traversed.
|
||||
*
|
||||
* @param directory the root of the directory to scan
|
||||
* @param classloader the classloader that includes resources found in {@code directory}
|
||||
* @param packagePrefix resource path prefix inside {@code classloader} for any files found
|
||||
* under {@code directory}
|
||||
* @param currentPath canonical files already visited in the current directory tree path, for
|
||||
* cycle elimination
|
||||
*/
|
||||
private void scanDirectory(File directory, ClassLoader classloader, String packagePrefix, Set<File> currentPath) throws IOException {
|
||||
File[] files = directory.listFiles();
|
||||
if (files == null) {
|
||||
logger.warning("Cannot read directory " + directory);
|
||||
// IO error, just skip the directory
|
||||
return;
|
||||
}
|
||||
for (File f : files) {
|
||||
String name = f.getName();
|
||||
if (f.isDirectory()) {
|
||||
File deref = f.getCanonicalFile();
|
||||
if (currentPath.add(deref)) {
|
||||
scanDirectory(deref, classloader, packagePrefix + name + "/", currentPath);
|
||||
currentPath.remove(deref);
|
||||
}
|
||||
} else {
|
||||
String resourceName = packagePrefix + name;
|
||||
if (!resourceName.equals(JarFile.MANIFEST_NAME)) {
|
||||
resources.get(classloader).add(resourceName);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@VisibleForTesting
|
||||
static String getClassName(String filename) {
|
||||
int classNameEnd = filename.length() - CLASS_FILE_NAME_EXTENSION.length();
|
||||
return filename.substring(0, classNameEnd).replace('/', '.');
|
||||
}
|
||||
|
||||
// TODO(benyu): Try java.nio.file.Paths#get() when Guava drops JDK 6 support.
|
||||
@VisibleForTesting
|
||||
static File toFile(URL url) {
|
||||
checkArgument(url.getProtocol().equals("file"));
|
||||
try {
|
||||
return new File(url.toURI()); // Accepts escaped characters like %20.
|
||||
} catch (URISyntaxException e) { // URL.toURI() doesn't escape chars.
|
||||
return new File(url.getPath()); // Accepts non-escaped chars like space.
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user