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/* |
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* Copyright 2014, Armenak Grigoryan, and individual contributors as indicated |
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* by the @authors tag. See the copyright.txt in the distribution for a |
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* full listing of individual contributors. |
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* |
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* This is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU Lesser General Public License as |
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* published by the Free Software Foundation; either version 2.1 of |
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* the License, or (at your option) any later version. |
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* |
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* This software is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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*/ |
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package com.strider.datadefender.requirement.registry; |
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import com.mchange.v1.lang.ClassUtils; |
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import com.strider.datadefender.database.IDbFactory; |
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import com.strider.datadefender.requirement.Requirement; |
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import java.lang.reflect.InvocationTargetException; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import java.util.HashMap; |
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import java.util.LinkedHashSet; |
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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.stream.Collectors; |
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import java.util.stream.Stream; |
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import lombok.RequiredArgsConstructor; |
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import lombok.extern.log4j.Log4j2; |
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import org.apache.commons.collections4.CollectionUtils; |
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/** |
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* Very basic registry for classes that need to be instantiated for use by |
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* requirement functions. |
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* |
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* @author Zaahid Bateson <[email protected]> |
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*/ |
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@RequiredArgsConstructor |
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@Log4j2 |
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public class ClassAndFunctionRegistry { |
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private static ClassAndFunctionRegistry instance = new ClassAndFunctionRegistry(); |
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private Map<Class<?>, RequirementFunction> singletons = new HashMap<>(); |
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private Set<String> autoResolvePackages = new LinkedHashSet<>(); |
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public RequirementFunction getFunctionsSingleton(Class<?> cls) { |
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return singletons.get(cls); |
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} |
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/** |
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* Clears any set auto resolve packages on the singleton instance. |
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*/ |
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public void clearAutoResolvePackages() { |
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autoResolvePackages.clear(); |
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} |
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/** |
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* Registers the passed package name as auto-resolvable, so classes under it |
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* don't need to be fully qualified. |
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* |
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* @param name |
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*/ |
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public void registerAutoResolvePackage(String name) { |
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log.debug("Registering autoresolve package {}", name); |
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autoResolvePackages.add(name); |
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} |
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/** |
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* Returns a Class object for the passed name, using autoresolve packages if |
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* the name of the passed class starts with an uppercase letter, and does |
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* not contain any "." characters. |
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* |
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* This means inner classes can't be autoresolved. |
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* |
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* @param className |
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* @return |
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*/ |
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public Class<?> getClassForName(String className) throws ClassNotFoundException { |
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if (!className.contains(".") && Character.isUpperCase(className.charAt(0))) { |
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for (String pkg : autoResolvePackages) { |
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try { |
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Class<?> c = ClassUtils.forName(pkg + "." + className); |
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if (Modifier.isPublic(c.getModifiers())) { |
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log.debug("{} class autoresolved to {}", () -> className, () -> pkg + "." + className); |
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return c; |
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} |
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} catch (ClassNotFoundException e) { |
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log.debug("Class with name {} not found while autoresolving", () -> pkg + "." + className); |
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} |
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} |
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} |
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return ClassUtils.forName(className); |
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} |
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/** |
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* If the passed Class's package is defined in an autoresolved package, the |
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* shortened name of the class is returned without the package name. |
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* |
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* @param className |
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* @return |
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*/ |
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public String getNameForClass(Class<?> clazz) { |
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if (autoResolvePackages.contains(clazz.getPackageName())) { |
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return clazz.getCanonicalName().replace(clazz.getPackageName() + ".", ""); |
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} |
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return clazz.getCanonicalName(); |
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} |
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public void registerFunctions(Requirement requirements) |
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throws NoSuchMethodException, |
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InstantiationException, |
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IllegalAccessException, |
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IllegalArgumentException, |
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InvocationTargetException { |
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log.debug("Number of tables: {}", () -> CollectionUtils.emptyIfNull(requirements.getTables()).size()); |
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List<Method> fns = Stream.concat( |
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requirements.getTables().stream() |
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.flatMap((t) -> t.getColumns().stream()) |
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.flatMap((c) -> c.getResolvedPlan().getFunctions().stream()), |
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requirements.getTables().stream() |
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.flatMap((t) -> t.getColumns().stream()) |
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.map((c) -> c.getResolvedPlan().getCombiner()) |
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) |
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.filter((fn) -> fn != null) // combiner could be null |
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.map((fn) -> fn.getFunction()) |
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.collect(Collectors.toList()); |
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log.debug("Found {} classes to register with functions for anonymization", fns.size()); |
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for (Method m : fns) { |
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Class<?> cls = m.getDeclaringClass(); |
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log.debug( |
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"Class: {}, is a RequirementFunctionClass: {}", |
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() -> cls.getName(), |
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() -> RequirementFunction.class.isAssignableFrom(cls) |
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); |
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if (RequirementFunction.class.isAssignableFrom(cls)) { |
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log.debug("Registering RequirementFunctionClass: {}", cls); |
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singletons.put(cls, (RequirementFunction) cls.getDeclaredConstructor().newInstance()); |
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} |
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} |
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} |
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public void initialize(IDbFactory factory) { |
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for (Object o : singletons.values()) { |
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if (o instanceof DatabaseAwareRequirementFunction) { |
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log.debug("Initializing DatabaseAwareRequirementFunctionClass for: {}", o.getClass()); |
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((DatabaseAwareRequirementFunction) o).initialize(factory); |
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} |
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} |
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} |
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public static ClassAndFunctionRegistry singleton() { |
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return instance; |
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} |
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} |
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armenak /
DataDefender
