| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // 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 |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.googlesource.gerrit.plugins.scripting.groovyprovider; |
| |
| import com.google.common.collect.Sets; |
| import com.google.gerrit.server.plugins.AbstractPreloadedPluginScanner; |
| import com.google.gerrit.server.plugins.InvalidPluginException; |
| import com.google.gerrit.server.plugins.Plugin.ApiType; |
| import com.google.gerrit.server.plugins.PluginEntry; |
| import groovy.lang.Binding; |
| import groovy.lang.Script; |
| import groovy.util.ResourceException; |
| import groovy.util.ScriptException; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.stream.Stream; |
| import org.codehaus.groovy.runtime.InvokerHelper; |
| |
| public class GroovyPluginScanner extends AbstractPreloadedPluginScanner { |
| |
| public GroovyPluginScanner(String pluginName, GroovyPluginScriptEngine scriptEngine, Path srcFile) |
| throws InvalidPluginException { |
| super(pluginName, getPluginVersion(srcFile), load(scriptEngine, srcFile), ApiType.PLUGIN); |
| } |
| |
| private static String getPluginVersion(Path srcFile) { |
| String srcFileName = srcFile.getFileName().toString(); |
| int dashPos = srcFileName.lastIndexOf('-'); |
| int dotPos = srcFileName.lastIndexOf('.'); |
| return dashPos > 0 ? srcFileName.substring(dashPos + 1, dotPos) : "0"; |
| } |
| |
| @Override |
| public Optional<PluginEntry> getEntry(String resourcePath) { |
| return Optional.empty(); |
| } |
| |
| @Override |
| public InputStream getInputStream(PluginEntry entry) throws IOException { |
| throw new FileNotFoundException(); |
| } |
| |
| @Override |
| public Stream<PluginEntry> entries() { |
| return Stream.empty(); |
| } |
| |
| public static Set<Class<?>> load(GroovyPluginScriptEngine scriptEngine, Path srcFile) |
| throws InvalidPluginException { |
| try { |
| return scanGroovyScriptBindings(scriptEngine.loadScriptByName(srcFile.toString())); |
| } catch (ResourceException | ScriptException e) { |
| throw new InvalidPluginException("Cannot compile and execute Groovy script " + srcFile, e); |
| } |
| } |
| |
| private static Set<Class<?>> scanGroovyScriptBindings(Class<?> scriptClass) |
| throws InvalidPluginException { |
| Set<Class<?>> classes = Sets.newHashSet(); |
| |
| try { |
| Method mainMethod = scriptClass.getMethod("main", String[].class); |
| int modifiers = mainMethod.getModifiers(); |
| if (Modifier.isPublic(modifiers) && Modifier.isStatic(modifiers)) { |
| classes.addAll(getMainBindings(scriptClass)); |
| } |
| } catch (NoSuchMethodException e) { |
| classes.add(scriptClass); |
| |
| } catch (SecurityException e) { |
| throw new InvalidPluginException( |
| "Cannot access Groovy script class " + scriptClass.getName(), e); |
| } |
| return classes; |
| } |
| |
| private static Set<Class<?>> getMainBindings(Class<?> scriptClass) { |
| Set<Class<?>> classes = Sets.newHashSet(); |
| Binding binding = new Binding(); |
| Script script = InvokerHelper.createScript(scriptClass, binding); |
| script.run(); |
| |
| for (Object variable : binding.getVariables().keySet()) { |
| Object value = binding.getVariable(variable.toString()); |
| if (value == null) { |
| continue; |
| } |
| |
| if (ArrayList.class.isAssignableFrom(value.getClass())) { |
| classes.addAll(scanArrayOfObjectOrClass(value)); |
| } else { |
| classes.add(scanObjectOrClass(value)); |
| } |
| } |
| |
| return classes; |
| } |
| |
| private static Set<Class<?>> scanArrayOfObjectOrClass(Object value) { |
| Set<Class<?>> classes = Sets.newHashSet(); |
| ArrayList<?> list = (ArrayList<?>) value; |
| for (Object element : list) { |
| if (element == null) { |
| continue; |
| } |
| classes.add(scanObjectOrClass(element)); |
| } |
| return classes; |
| } |
| |
| private static Class<?> scanObjectOrClass(Object element) { |
| if (Class.class.isAssignableFrom(element.getClass())) { |
| return (Class<?>) element; |
| } |
| return element.getClass(); |
| } |
| } |