Java tutorial
/* * Copyright 2012-2013 the original author or authors. * * 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.springframework.boot.autoconfigure.condition; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.context.annotation.Condition; import org.springframework.context.annotation.ConditionContext; import org.springframework.core.type.AnnotatedTypeMetadata; import org.springframework.util.ClassUtils; import org.springframework.util.StringUtils; /** * {@link Condition} that checks for a web application context and returns false if one is * found. * * @author Dave Syer * @see ConditionalOnNotWebApplication */ class OnNotWebApplicationCondition implements Condition { private static Log logger = LogFactory.getLog(OnNotWebApplicationCondition.class); @Override public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) { String checking = ConditionLogUtils.getPrefix(logger, metadata); if (!ClassUtils.isPresent("org.springframework.web.context.support.GenericWebApplicationContext", null)) { if (logger.isDebugEnabled()) { logger.debug(checking + "Web application classes not found"); } return true; } boolean result = !StringUtils .arrayToCommaDelimitedString(context.getBeanFactory().getRegisteredScopeNames()) .contains("session"); if (logger.isDebugEnabled()) { logger.debug(checking + "Web application context found: " + !result); } return result; } }