mirror of
https://github.com/Eaglercraft-TeaVM-Fork/eagler-teavm.git
synced 2024-12-22 16:14:10 -08:00
Support plugin loading from bootstrap environment
This commit is contained in:
Alexey Andreev
parent
cb355a85f5
commit
256814a60a
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@ -40,6 +40,11 @@
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<artifactId>teavm-interop</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.teavm</groupId>
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<artifactId>teavm-metaprogramming-api</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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@ -0,0 +1,50 @@
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/*
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* Copyright 2017 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.teavm.vm;
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import static org.teavm.metaprogramming.Metaprogramming.emit;
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import static org.teavm.metaprogramming.Metaprogramming.exit;
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import static org.teavm.metaprogramming.Metaprogramming.findClass;
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import java.util.ArrayList;
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import java.util.List;
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import org.teavm.metaprogramming.CompileTime;
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import org.teavm.metaprogramming.Meta;
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import org.teavm.metaprogramming.Metaprogramming;
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import org.teavm.metaprogramming.ReflectClass;
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import org.teavm.metaprogramming.Value;
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import org.teavm.metaprogramming.reflect.ReflectMethod;
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import org.teavm.vm.spi.TeaVMPlugin;
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@CompileTime
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public final class TeaVMBootstrapPluginLoader {
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private TeaVMBootstrapPluginLoader() {
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}
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@Meta
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public native static List<TeaVMPlugin> loadPlugins(boolean ignore);
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private static void loadPlugins(Value<Boolean> ignore) {
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Value<List<TeaVMPlugin>> plugins = emit(() -> new ArrayList<>());
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List<String> pluginClassNames = new ArrayList<>();
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TeaVMPluginReader.load(Metaprogramming.getClassLoader(), pluginClassNames::add);
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for (String pluginClassName : pluginClassNames) {
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ReflectClass<?> cls = findClass(pluginClassName);
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ReflectMethod constructor = cls.getMethod("<init>");
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emit(() -> plugins.get().add((TeaVMPlugin) constructor.construct()));
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}
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exit(() -> plugins.get());
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}
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}
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@ -15,192 +15,29 @@
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*/
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package org.teavm.vm;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Consumer;
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import java.util.stream.Collectors;
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import org.objectweb.asm.AnnotationVisitor;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassVisitor;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import org.teavm.vm.spi.After;
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import org.teavm.vm.spi.Before;
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import org.teavm.vm.spi.Requires;
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import org.teavm.interop.PlatformMarker;
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import org.teavm.vm.spi.TeaVMPlugin;
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public final class TeaVMPluginLoader {
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private static final String DESCRIPTOR_LOCATION = "META-INF/services/org.teavm.vm.spi.TeaVMPlugin";
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private static final String REQUIRES_DESC = Type.getDescriptor(Requires.class);
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private static final String BEFORE_DESC = Type.getDescriptor(Before.class);
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private static final String AFTER_DESC = Type.getDescriptor(After.class);
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private TeaVMPluginLoader() {
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}
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public static List<TeaVMPlugin> load(ClassLoader classLoader) {
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Set<String> unorderedPlugins = new HashSet<>();
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try {
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Enumeration<URL> resourceFiles = classLoader.getResources(DESCRIPTOR_LOCATION);
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while (resourceFiles.hasMoreElements()) {
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URL resourceFile = resourceFiles.nextElement();
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try (BufferedReader input = new BufferedReader(
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new InputStreamReader(resourceFile.openStream(), "UTF-8"))) {
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readPlugins(input, unorderedPlugins);
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}
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}
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} catch (IOException e) {
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throw new IllegalStateException("Error loading plugins", e);
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}
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return orderPlugins(classLoader, unorderedPlugins).stream().map(p -> instantiate(classLoader, p))
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.collect(Collectors.toList());
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}
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static List<String> orderPlugins(ClassLoader classLoader, Set<String> classNames) {
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Map<String, PluginDescriptor> descriptors = new HashMap<>();
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try {
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for (String className : classNames) {
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PluginDescriptor descriptor = new PluginDescriptor();
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descriptor.name = className;
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if (readDescriptor(classLoader, className, descriptor)) {
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descriptors.put(className, descriptor);
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}
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}
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} catch (IOException e) {
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throw new IllegalStateException("Error ordering plugins", e);
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}
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findReachableDescriptors(descriptors);
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processDescriptors(descriptors);
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List<String> plugins = new ArrayList<>();
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Set<String> visited = new HashSet<>();
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Set<String> emmited = new HashSet<>();
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for (PluginDescriptor descriptor : descriptors.values()) {
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orderDescriptors(descriptor, descriptors, plugins, visited, emmited, new ArrayList<>());
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}
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if (isBootstrap()) {
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return TeaVMBootstrapPluginLoader.loadPlugins(false);
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} else {
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List<TeaVMPlugin> plugins = new ArrayList<>();
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TeaVMPluginReader.load(classLoader, className -> plugins.add(instantiate(classLoader, className)));
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return plugins;
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}
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private static void readPlugins(BufferedReader input, Set<String> plugins) throws IOException {
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while (true) {
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String line = input.readLine();
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if (line == null) {
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break;
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}
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line = line.trim();
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if (line.isEmpty() || line.startsWith("#")) {
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continue;
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}
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plugins.add(line);
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}
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}
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private static boolean readDescriptor(ClassLoader classLoader, String className, PluginDescriptor descriptor)
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throws IOException {
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try (InputStream input = classLoader.getResourceAsStream(className.replace('.', '/') + ".class")) {
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if (input == null) {
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@PlatformMarker
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private static boolean isBootstrap() {
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return false;
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}
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ClassReader reader = new ClassReader(new BufferedInputStream(input));
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PluginDescriptorFiller filler = new PluginDescriptorFiller(descriptor);
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reader.accept(filler, 0);
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return true;
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}
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}
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private static void findReachableDescriptors(Map<String, PluginDescriptor> descriptors) {
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Set<String> visited = new HashSet<>();
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for (String plugin : descriptors.keySet()) {
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isReachable(plugin, visited, descriptors);
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}
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}
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private static boolean isReachable(String plugin, Set<String> visited, Map<String, PluginDescriptor> descriptors) {
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PluginDescriptor descriptor = descriptors.get(plugin);
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if (descriptor == null) {
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return false;
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}
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if (!visited.add(plugin)) {
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return descriptor.reachable;
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}
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boolean reachable = true;
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for (String required : descriptor.requires) {
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if (!isReachable(required, visited, descriptors)) {
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reachable = false;
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break;
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}
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}
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descriptor.reachable = reachable;
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return reachable;
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}
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private static void processDescriptors(Map<String, PluginDescriptor> descriptors) {
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for (PluginDescriptor descriptor : descriptors.values()) {
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if (descriptor.after.length > 0 && descriptor.before.length > 0) {
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throw new IllegalStateException("Plugin " + descriptor.name
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+ " has both before and after annotations");
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}
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descriptor.afterList.addAll(Arrays.asList(descriptor.after));
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for (String before : descriptor.before) {
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PluginDescriptor beforeDescriptor = descriptors.get(before);
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if (beforeDescriptor != null && beforeDescriptor.reachable) {
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beforeDescriptor.afterList.add(descriptor.name);
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}
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}
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}
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}
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private static void orderDescriptors(PluginDescriptor descriptor, Map<String, PluginDescriptor> descriptors,
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List<String> list, Set<String> visited, Set<String> emmited, List<String> path) {
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if (!descriptor.reachable) {
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return;
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}
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if (!visited.add(descriptor.name)) {
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return;
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}
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path.add(descriptor.name);
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for (String after : descriptor.afterList) {
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PluginDescriptor afterDescriptor = descriptors.get(after);
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if (afterDescriptor != null && afterDescriptor.reachable) {
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if (visited.contains(after) && !emmited.contains(after)) {
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List<String> loop = new ArrayList<>();
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Collections.reverse(path);
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for (String pathElem : path) {
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loop.add(pathElem);
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if (pathElem.equals(afterDescriptor.name)) {
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break;
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}
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}
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Collections.reverse(loop);
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throw new IllegalStateException("Circular dependency found: " + loop.stream()
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.collect(Collectors.joining(" -> ")));
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}
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orderDescriptors(afterDescriptor, descriptors, list, visited, emmited, path);
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}
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}
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emmited.add(descriptor.name);
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path.remove(descriptor.name);
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list.add(descriptor.name);
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}
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private static TeaVMPlugin instantiate(ClassLoader classLoader, String className) {
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try {
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@ -209,56 +46,4 @@ public final class TeaVMPluginLoader {
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throw new IllegalStateException("Can't instantiate plugin " + className, e);
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}
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}
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static class PluginDescriptorFiller extends ClassVisitor {
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PluginDescriptor descriptor;
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public PluginDescriptorFiller(PluginDescriptor descriptor) {
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super(Opcodes.ASM5);
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this.descriptor = descriptor;
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}
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@Override
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public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
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if (desc.equals(REQUIRES_DESC)) {
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return readClassArray(arr -> descriptor.requires = arr);
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} else if (desc.equals(BEFORE_DESC)) {
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return readClassArray(arr -> descriptor.before = arr);
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} else if (desc.equals(AFTER_DESC)) {
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return readClassArray(arr -> descriptor.after = arr);
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}
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return null;
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}
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private AnnotationVisitor readClassArray(Consumer<String[]> resultConsumer) {
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return new AnnotationVisitor(Opcodes.ASM5) {
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@Override
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public AnnotationVisitor visitArray(String name) {
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List<String> values = new ArrayList<>();
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if (name.equals("value")) {
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return new AnnotationVisitor(Opcodes.ASM5) {
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@Override
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public void visit(String name, Object value) {
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values.add(((Type) value).getClassName());
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}
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@Override
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public void visitEnd() {
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resultConsumer.accept(values.toArray(new String[0]));
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}
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};
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}
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return null;
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}
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};
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}
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}
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static class PluginDescriptor {
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String name;
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String[] requires = new String[0];
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String[] before = new String[0];
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String[] after = new String[0];
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List<String> afterList = new ArrayList<>();
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boolean reachable;
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}
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}
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256
core/src/main/java/org/teavm/vm/TeaVMPluginReader.java
Normal file
256
core/src/main/java/org/teavm/vm/TeaVMPluginReader.java
Normal file
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@ -0,0 +1,256 @@
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/*
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* Copyright 2017 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
|
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* 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
|
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* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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* See the License for the specific language governing permissions and
|
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* limitations under the License.
|
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*/
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package org.teavm.vm;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Consumer;
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import java.util.stream.Collectors;
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import org.objectweb.asm.AnnotationVisitor;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassVisitor;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import org.teavm.metaprogramming.CompileTime;
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import org.teavm.vm.spi.After;
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import org.teavm.vm.spi.Before;
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import org.teavm.vm.spi.Requires;
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@CompileTime
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final class TeaVMPluginReader {
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static final String DESCRIPTOR_LOCATION = "META-INF/services/org.teavm.vm.spi.TeaVMPlugin";
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static final String REQUIRES_DESC = Type.getDescriptor(Requires.class);
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static final String BEFORE_DESC = Type.getDescriptor(Before.class);
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static final String AFTER_DESC = Type.getDescriptor(After.class);
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private TeaVMPluginReader() {
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}
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static void load(ClassLoader classLoader, Consumer<String> consumer) {
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Set<String> unorderedPlugins = new HashSet<>();
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try {
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Enumeration<URL> resourceFiles = classLoader.getResources(DESCRIPTOR_LOCATION);
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while (resourceFiles.hasMoreElements()) {
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URL resourceFile = resourceFiles.nextElement();
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try (BufferedReader input = new BufferedReader(
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new InputStreamReader(resourceFile.openStream(), "UTF-8"))) {
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readPlugins(input, unorderedPlugins);
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}
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}
|
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} catch (IOException e) {
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throw new IllegalStateException("Error loading plugins", e);
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}
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orderPlugins(classLoader, unorderedPlugins).forEach(consumer);
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}
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static List<String> orderPlugins(ClassLoader classLoader, Set<String> classNames) {
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Map<String, PluginDescriptor> descriptors = new HashMap<>();
|
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try {
|
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for (String className : classNames) {
|
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PluginDescriptor descriptor = new PluginDescriptor();
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descriptor.name = className;
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if (readDescriptor(classLoader, className, descriptor)) {
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descriptors.put(className, descriptor);
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}
|
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}
|
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} catch (IOException e) {
|
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throw new IllegalStateException("Error ordering plugins", e);
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}
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|
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findReachableDescriptors(descriptors);
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processDescriptors(descriptors);
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List<String> plugins = new ArrayList<>();
|
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Set<String> visited = new HashSet<>();
|
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Set<String> emmited = new HashSet<>();
|
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for (PluginDescriptor descriptor : descriptors.values()) {
|
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orderDescriptors(descriptor, descriptors, plugins, visited, emmited, new ArrayList<>());
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}
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|
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return plugins;
|
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}
|
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|
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static void readPlugins(BufferedReader input, Set<String> plugins) throws IOException {
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while (true) {
|
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String line = input.readLine();
|
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if (line == null) {
|
||||
break;
|
||||
}
|
||||
line = line.trim();
|
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if (line.isEmpty() || line.startsWith("#")) {
|
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continue;
|
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}
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plugins.add(line);
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}
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}
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|
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private static boolean readDescriptor(ClassLoader classLoader, String className, PluginDescriptor descriptor)
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throws IOException {
|
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try (InputStream input = classLoader.getResourceAsStream(className.replace('.', '/') + ".class")) {
|
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if (input == null) {
|
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return false;
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}
|
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ClassReader reader = new ClassReader(new BufferedInputStream(input));
|
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PluginDescriptorFiller filler = new PluginDescriptorFiller(descriptor);
|
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reader.accept(filler, 0);
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return true;
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}
|
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}
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|
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private static void findReachableDescriptors(Map<String, PluginDescriptor> descriptors) {
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Set<String> visited = new HashSet<>();
|
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for (String plugin : descriptors.keySet()) {
|
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isReachable(plugin, visited, descriptors);
|
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}
|
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}
|
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|
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private static boolean isReachable(String plugin, Set<String> visited, Map<String, PluginDescriptor> descriptors) {
|
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PluginDescriptor descriptor = descriptors.get(plugin);
|
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if (descriptor == null) {
|
||||
return false;
|
||||
}
|
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if (!visited.add(plugin)) {
|
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return descriptor.reachable;
|
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}
|
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|
||||
boolean reachable = true;
|
||||
for (String required : descriptor.requires) {
|
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if (!isReachable(required, visited, descriptors)) {
|
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reachable = false;
|
||||
break;
|
||||
}
|
||||
}
|
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descriptor.reachable = reachable;
|
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return reachable;
|
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}
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|
||||
private static void processDescriptors(Map<String, PluginDescriptor> descriptors) {
|
||||
for (PluginDescriptor descriptor : descriptors.values()) {
|
||||
if (descriptor.after.length > 0 && descriptor.before.length > 0) {
|
||||
throw new IllegalStateException("Plugin " + descriptor.name
|
||||
+ " has both before and after annotations");
|
||||
}
|
||||
descriptor.afterList.addAll(Arrays.asList(descriptor.after));
|
||||
for (String before : descriptor.before) {
|
||||
PluginDescriptor beforeDescriptor = descriptors.get(before);
|
||||
if (beforeDescriptor != null && beforeDescriptor.reachable) {
|
||||
beforeDescriptor.afterList.add(descriptor.name);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private static void orderDescriptors(PluginDescriptor descriptor, Map<String, PluginDescriptor> descriptors,
|
||||
List<String> list, Set<String> visited, Set<String> emmited, List<String> path) {
|
||||
if (!descriptor.reachable) {
|
||||
return;
|
||||
}
|
||||
if (!visited.add(descriptor.name)) {
|
||||
return;
|
||||
}
|
||||
path.add(descriptor.name);
|
||||
|
||||
for (String after : descriptor.afterList) {
|
||||
PluginDescriptor afterDescriptor = descriptors.get(after);
|
||||
if (afterDescriptor != null && afterDescriptor.reachable) {
|
||||
if (visited.contains(after) && !emmited.contains(after)) {
|
||||
List<String> loop = new ArrayList<>();
|
||||
Collections.reverse(path);
|
||||
for (String pathElem : path) {
|
||||
loop.add(pathElem);
|
||||
if (pathElem.equals(afterDescriptor.name)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
Collections.reverse(loop);
|
||||
throw new IllegalStateException("Circular dependency found: " + loop.stream()
|
||||
.collect(Collectors.joining(" -> ")));
|
||||
}
|
||||
orderDescriptors(afterDescriptor, descriptors, list, visited, emmited, path);
|
||||
}
|
||||
}
|
||||
|
||||
emmited.add(descriptor.name);
|
||||
path.remove(descriptor.name);
|
||||
list.add(descriptor.name);
|
||||
}
|
||||
|
||||
static class PluginDescriptorFiller extends ClassVisitor {
|
||||
PluginDescriptor descriptor;
|
||||
|
||||
public PluginDescriptorFiller(PluginDescriptor descriptor) {
|
||||
super(Opcodes.ASM5);
|
||||
this.descriptor = descriptor;
|
||||
}
|
||||
|
||||
@Override
|
||||
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
|
||||
if (desc.equals(REQUIRES_DESC)) {
|
||||
return readClassArray(arr -> descriptor.requires = arr);
|
||||
} else if (desc.equals(BEFORE_DESC)) {
|
||||
return readClassArray(arr -> descriptor.before = arr);
|
||||
} else if (desc.equals(AFTER_DESC)) {
|
||||
return readClassArray(arr -> descriptor.after = arr);
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
private AnnotationVisitor readClassArray(Consumer<String[]> resultConsumer) {
|
||||
return new AnnotationVisitor(Opcodes.ASM5) {
|
||||
@Override
|
||||
public AnnotationVisitor visitArray(String name) {
|
||||
List<String> values = new ArrayList<>();
|
||||
if (name.equals("value")) {
|
||||
return new AnnotationVisitor(Opcodes.ASM5) {
|
||||
@Override
|
||||
public void visit(String name, Object value) {
|
||||
values.add(((Type) value).getClassName());
|
||||
}
|
||||
@Override
|
||||
public void visitEnd() {
|
||||
resultConsumer.accept(values.toArray(new String[0]));
|
||||
}
|
||||
};
|
||||
}
|
||||
return null;
|
||||
}
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
static class PluginDescriptor {
|
||||
String name;
|
||||
String[] requires = new String[0];
|
||||
String[] before = new String[0];
|
||||
String[] after = new String[0];
|
||||
List<String> afterList = new ArrayList<>();
|
||||
boolean reachable;
|
||||
}
|
||||
}
|
||||
|
|
@ -56,7 +56,7 @@ public class PluginLoaderTest {
|
|||
}
|
||||
|
||||
private List<String> order(Class<?>... classes) {
|
||||
return TeaVMPluginLoader.orderPlugins(PluginLoaderTest.class.getClassLoader(),
|
||||
return TeaVMPluginReader.orderPlugins(PluginLoaderTest.class.getClassLoader(),
|
||||
Arrays.stream(classes).map(Class::getName).collect(Collectors.toSet()));
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user