| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.shiro.config; |
| |
| import org.apache.shiro.io.ResourceUtils; |
| import org.apache.shiro.util.AbstractFactory; |
| import org.apache.shiro.util.CollectionUtils; |
| import org.apache.shiro.util.Factory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Base support class for {@link Factory} implementations that generate their instance(s) based on |
| * {@link Ini} configuration. |
| * |
| * @since 1.0 |
| */ |
| public abstract class IniFactorySupport<T> extends AbstractFactory<T> { |
| |
| public static final String DEFAULT_INI_RESOURCE_PATH = "classpath:shiro.ini"; |
| |
| private static transient final Logger log = LoggerFactory.getLogger(IniFactorySupport.class); |
| |
| private Ini ini; |
| |
| protected IniFactorySupport() { |
| } |
| |
| protected IniFactorySupport(Ini ini) { |
| this.ini = ini; |
| } |
| |
| public Ini getIni() { |
| return ini; |
| } |
| |
| public void setIni(Ini ini) { |
| this.ini = ini; |
| } |
| |
| /** |
| * Returns a new Ini instance created from the default {@code classpath:shiro.ini} file, or {@code null} if |
| * the file does not exist. |
| * |
| * @return a new Ini instance created from the default {@code classpath:shiro.ini} file, or {@code null} if |
| * the file does not exist. |
| */ |
| public static Ini loadDefaultClassPathIni() { |
| Ini ini = null; |
| if (ResourceUtils.resourceExists(DEFAULT_INI_RESOURCE_PATH)) { |
| log.debug("Found shiro.ini at the root of the classpath."); |
| ini = new Ini(); |
| ini.loadFromPath(DEFAULT_INI_RESOURCE_PATH); |
| if (CollectionUtils.isEmpty(ini)) { |
| log.warn("shiro.ini found at the root of the classpath, but it did not contain any data."); |
| } |
| } |
| return ini; |
| } |
| |
| /** |
| * Tries to resolve the Ini instance to use for configuration. This implementation functions as follows: |
| * <ol> |
| * <li>The {@code Ini} instance returned from {@link #getIni()} will be returned if it is not null or empty.</li> |
| * <li>If {@link #getIni()} is {@code null} or empty, this implementation will attempt to find and load the |
| * {@link #loadDefaultClassPathIni() default class path Ini}.</li> |
| * <li>If neither of the two attempts above returns an instance, {@code null} is returned</li> |
| * </ol> |
| * |
| * @return the Ini instance to use for configuration. |
| */ |
| protected Ini resolveIni() { |
| Ini ini = getIni(); |
| if (CollectionUtils.isEmpty(ini)) { |
| log.debug("Null or empty Ini instance. Falling back to the default {} file.", DEFAULT_INI_RESOURCE_PATH); |
| ini = loadDefaultClassPathIni(); |
| } |
| return ini; |
| } |
| |
| /** |
| * Creates a new object instance by using a configured INI source. This implementation functions as follows: |
| * <ol> |
| * <li>{@link #resolveIni() Resolve} the {@code Ini} source to use for configuration.</li> |
| * <li>If there was no resolved Ini source, create and return a simple default instance via the |
| * {@link #createDefaultInstance()} method.</li> |
| * </ol> |
| * |
| * @return a new {@code SecurityManager} instance by using a configured INI source. |
| */ |
| public T createInstance() { |
| Ini ini = resolveIni(); |
| |
| T instance; |
| |
| if (CollectionUtils.isEmpty(ini)) { |
| log.debug("No populated Ini available. Creating a default instance."); |
| instance = createDefaultInstance(); |
| if (instance == null) { |
| String msg = getClass().getName() + " implementation did not return a default instance in " + |
| "the event of a null/empty Ini configuration. This is required to support the " + |
| "Factory interface. Please check your implementation."; |
| throw new IllegalStateException(msg); |
| } |
| } else { |
| log.debug("Creating instance from Ini [" + ini + "]"); |
| instance = createInstance(ini); |
| if (instance == null) { |
| String msg = getClass().getName() + " implementation did not return a constructed instance from " + |
| "the createInstance(Ini) method implementation."; |
| throw new IllegalStateException(msg); |
| } |
| } |
| |
| return instance; |
| } |
| |
| protected abstract T createInstance(Ini ini); |
| |
| protected abstract T createDefaultInstance(); |
| } |