| /* |
| * Copyright 2001-2005 The Apache Software Foundation. |
| * |
| * 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 org.apache.logging.log4j.catalog.api.plugins; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.catalog.api.ConstraintType; |
| import org.apache.logging.log4j.catalog.api.exception.ConstraintCreationException; |
| import org.apache.logging.log4j.core.config.plugins.util.PluginManager; |
| import org.apache.logging.log4j.core.config.plugins.util.PluginType; |
| import org.apache.logging.log4j.core.util.ReflectionUtil; |
| |
| /** |
| * |
| */ |
| |
| public class ConstraintPlugins { |
| |
| private static final Logger LOGGER = LogManager.getLogger(ConstraintPlugins.class); |
| |
| private static final Map<String, ConstraintType> constraintMap = new HashMap<>(); |
| |
| private static volatile ConstraintPlugins instance = null; |
| |
| private static final Object LOCK = new Object(); |
| |
| public static ConstraintPlugins getInstance() { |
| if (instance == null) { |
| synchronized(LOCK) { |
| if (instance == null) { |
| instance = new ConstraintPlugins(); |
| } |
| } |
| } |
| return instance; |
| } |
| |
| private ConstraintPlugins() { |
| |
| final PluginManager manager = new PluginManager(ConstraintType.CATEGORY); |
| if (LOGGER instanceof org.apache.logging.log4j.core.Logger) { |
| List<String> pluginPackages = |
| ((org.apache.logging.log4j.core.Logger) LOGGER).getContext().getConfiguration().getPluginPackages(); |
| manager.collectPlugins(pluginPackages); |
| } else { |
| manager.collectPlugins(); |
| } |
| final Map<String, PluginType<?>> plugins = manager.getPlugins(); |
| for (Map.Entry<String, PluginType<?>> entry : plugins.entrySet()) { |
| try { |
| final Class<? extends ConstraintType> clazz = entry.getValue().getPluginClass().asSubclass(ConstraintType.class); |
| ConstraintType constraintType = ReflectionUtil.instantiate(clazz); |
| constraintMap.put(entry.getKey(), constraintType); |
| } catch (final Throwable t) { |
| throw new ConstraintCreationException("Unable to create constraint for " + entry.getKey(), t); |
| } |
| } |
| } |
| |
| public void validateConstraint(boolean isRequestContext, String constraint, String name, |
| String value, String constraintValue, StringBuilder errors) { |
| ConstraintType constraintType = constraintMap.get(constraint.toLowerCase(Locale.US)); |
| if (constraintType == null) { |
| if (errors.length() > 0) { |
| errors.append("\n"); |
| } |
| errors.append("Unable to locate constraint type ").append(constraint); |
| if (isRequestContext) { |
| errors.append(" for ThreadContext key "); |
| } else { |
| errors.append(" for key "); |
| } |
| errors.append(name); |
| return; |
| } |
| constraintType.validate(isRequestContext, name, value, constraintValue, errors); |
| } |
| |
| public ConstraintType findByName(String name) { |
| return constraintMap.get(name.toLowerCase(Locale.US)); |
| } |
| |
| public Map<String, ConstraintType> getConstraintMap() { |
| return Collections.unmodifiableMap(constraintMap); |
| } |
| } |