| /* |
| * 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.web.servlet; |
| |
| import javax.servlet.ServletContext; |
| |
| /** |
| * Base implementation for any components that need to access the web application's {@link ServletContext ServletContext}. |
| * |
| * @since 0.2 |
| */ |
| public class ServletContextSupport { |
| |
| //TODO - complete JavaDoc |
| private ServletContext servletContext = null; |
| |
| public ServletContext getServletContext() { |
| return servletContext; |
| } |
| |
| public void setServletContext(ServletContext servletContext) { |
| this.servletContext = servletContext; |
| } |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| protected String getContextInitParam(String paramName) { |
| return getServletContext().getInitParameter(paramName); |
| } |
| |
| private ServletContext getRequiredServletContext() { |
| ServletContext servletContext = getServletContext(); |
| if (servletContext == null) { |
| String msg = "ServletContext property must be set via the setServletContext method."; |
| throw new IllegalStateException(msg); |
| } |
| return servletContext; |
| } |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| protected void setContextAttribute(String key, Object value) { |
| if (value == null) { |
| removeContextAttribute(key); |
| } else { |
| getRequiredServletContext().setAttribute(key, value); |
| } |
| } |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| protected Object getContextAttribute(String key) { |
| return getRequiredServletContext().getAttribute(key); |
| } |
| |
| protected void removeContextAttribute(String key) { |
| getRequiredServletContext().removeAttribute(key); |
| } |
| |
| /** |
| * It is highly recommended not to override this method directly, and instead override the |
| * {@link #toStringBuilder() toStringBuilder()} method, a better-performing alternative. |
| * |
| * @return the String representation of this instance. |
| */ |
| @Override |
| public String toString() { |
| return toStringBuilder().toString(); |
| } |
| |
| /** |
| * Same concept as {@link #toString() toString()}, but returns a {@link StringBuilder} instance instead. |
| * |
| * @return a StringBuilder instance to use for appending String data that will eventually be returned from a |
| * {@code toString()} invocation. |
| */ |
| protected StringBuilder toStringBuilder() { |
| return new StringBuilder(super.toString()); |
| } |
| } |