/*
    * Copyright 2002-2014 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.test.web.servlet.setup;
  
  import java.io.IOException;
  import java.lang.annotation.Annotation;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Set;
  import javax.servlet.ServletContext;
  
  import org.springframework.beans.BeansException;
  import org.springframework.beans.TypeConverter;
  import org.springframework.beans.factory.BeanFactory;
  import org.springframework.beans.factory.NoSuchBeanDefinitionException;
  import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
  import org.springframework.beans.factory.config.DependencyDescriptor;
  import org.springframework.beans.factory.support.StaticListableBeanFactory;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ApplicationContextAware;
  import org.springframework.context.ApplicationEvent;
  import org.springframework.context.MessageSource;
  import org.springframework.context.MessageSourceResolvable;
  import org.springframework.context.NoSuchMessageException;
  import org.springframework.context.support.DelegatingMessageSource;
  import org.springframework.core.env.Environment;
  import org.springframework.core.env.StandardEnvironment;
  import org.springframework.core.io.Resource;
  import org.springframework.core.io.support.ResourcePatternResolver;
  import org.springframework.util.ObjectUtils;
  import org.springframework.web.context.WebApplicationContext;
  import org.springframework.web.context.support.ServletContextResourcePatternResolver;
  
  /**
   * A mock WebApplicationContext that accepts registrations of object instances.
   *
   * <p>As registered object instances are instantiated and initialized
   * externally, there is no wiring, bean initialization, lifecycle events, as
   * well as no pre-processing and post-processing hooks typically associated with
   * beans managed by an {@link ApplicationContext}. Just a simple lookup into a
   * {@link StaticListableBeanFactory}.
   *
   * @author Rossen Stoyanchev
   * @since 3.2
   */
  class StubWebApplicationContext implements WebApplicationContext {
  
  	private final ServletContext servletContext;
  
  	private final StubBeanFactory beanFactory = new StubBeanFactory();
  
  	private final String id = ObjectUtils.identityToString(this);
  
  	private final String displayName = ObjectUtils.identityToString(this);
  
  	private final long startupDate = System.currentTimeMillis();
  
  	private final Environment environment = new StandardEnvironment();
  
  	private final MessageSource messageSource = new DelegatingMessageSource();
  
  	private final ResourcePatternResolver resourcePatternResolver;
  
  
  	/**
  	 * Class constructor.
  	 */
  	public StubWebApplicationContext(ServletContext servletContext) {
  		this.servletContext = servletContext;
  		this.resourcePatternResolver = new ServletContextResourcePatternResolver(servletContext);
  	}
  
  	/**
  	 * Returns an instance that can initialize {@link ApplicationContextAware} beans.
  	 */
  	@Override
  	public AutowireCapableBeanFactory getAutowireCapableBeanFactory() throws IllegalStateException {
  		return this.beanFactory;
  	}
  
  	@Override
  	public ServletContext getServletContext() {
  		return this.servletContext;
  	}
 
 	//---------------------------------------------------------------------
 	// Implementation of ApplicationContext interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public String getId() {
 		return this.id;
 	}
 
 	@Override
 	public String getApplicationName() {
 		return "";
 	}
 
 	@Override
 	public String getDisplayName() {
 		return this.displayName;
 	}
 
 	@Override
 	public long getStartupDate() {
 		return this.startupDate;
 	}
 
 	@Override
 	public ApplicationContext getParent() {
 		return null;
 	}
 
 	@Override
 	public Environment getEnvironment() {
 		return this.environment ;
 	}
 
 	public void addBean(String name, Object bean) {
 		this.beanFactory.addBean(name, bean);
 	}
 
 	public void addBeans(List<?> beans) {
 		for (Object bean : beans) {
 			String name = bean.getClass().getName() + "#" +  ObjectUtils.getIdentityHexString(bean);
 			this.beanFactory.addBean(name, bean);
 		}
 	}
 
 	//---------------------------------------------------------------------
 	// Implementation of BeanFactory interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public Object getBean(String name) throws BeansException {
 		return this.beanFactory.getBean(name);
 	}
 
 	@Override
 	public <T> T getBean(String name, Class<T> requiredType) throws BeansException {
 		return this.beanFactory.getBean(name, requiredType);
 	}
 
 	@Override
 	public <T> T getBean(Class<T> requiredType) throws BeansException {
 		return this.beanFactory.getBean(requiredType);
 	}
 
 	@Override
 	public Object getBean(String name, Object... args) throws BeansException {
 		return this.beanFactory.getBean(name, args);
 	}
 
 	@Override
 	public <T> T getBean(Class<T> requiredType, Object... args) throws BeansException {
 		return this.beanFactory.getBean(requiredType, args);
 	}
 
 	@Override
 	public boolean containsBean(String name) {
 		return this.beanFactory.containsBean(name);
 	}
 
 	@Override
 	public boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
 		return this.beanFactory.isSingleton(name);
 	}
 
 	@Override
 	public boolean isPrototype(String name) throws NoSuchBeanDefinitionException {
 		return this.beanFactory.isPrototype(name);
 	}
 
 	@Override
 	public boolean isTypeMatch(String name, Class<?> targetType) throws NoSuchBeanDefinitionException {
 		return this.beanFactory.isTypeMatch(name, targetType);
 	}
 
 	@Override
 	public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
 		return this.beanFactory.getType(name);
 	}
 
 	@Override
 	public String[] getAliases(String name) {
 		return this.beanFactory.getAliases(name);
 	}
 
 	//---------------------------------------------------------------------
 	// Implementation of ListableBeanFactory interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public boolean containsBeanDefinition(String beanName) {
 		return this.beanFactory.containsBeanDefinition(beanName);
 	}
 
 	@Override
 	public int getBeanDefinitionCount() {
 		return this.beanFactory.getBeanDefinitionCount();
 	}
 
 	@Override
 	public String[] getBeanDefinitionNames() {
 		return this.beanFactory.getBeanDefinitionNames();
 	}
 
 	@Override
 	public String[] getBeanNamesForType(Class<?> type) {
 		return this.beanFactory.getBeanNamesForType(type);
 	}
 
 	@Override
 	public String[] getBeanNamesForType(Class<?> type, boolean includeNonSingletons, boolean allowEagerInit) {
 		return this.beanFactory.getBeanNamesForType(type, includeNonSingletons, allowEagerInit);
 	}
 
 	@Override
 	public <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException {
 		return this.beanFactory.getBeansOfType(type);
 	}
 
 	@Override
 	public <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
 			throws BeansException {
 
 		return this.beanFactory.getBeansOfType(type, includeNonSingletons, allowEagerInit);
 	}
 
 	@Override
 	public String[] getBeanNamesForAnnotation(Class<? extends Annotation> annotationType) {
 		return this.beanFactory.getBeanNamesForAnnotation(annotationType);
 	}
 
 	@Override
 	public Map<String, Object> getBeansWithAnnotation(Class<? extends Annotation> annotationType)
 			throws BeansException {
 
 		return this.beanFactory.getBeansWithAnnotation(annotationType);
 	}
 
 	@Override
 	public <A extends Annotation> A findAnnotationOnBean(String beanName, Class<A> annotationType)
 			throws NoSuchBeanDefinitionException{
 
 		return this.beanFactory.findAnnotationOnBean(beanName, annotationType);
 	}
 
 	//---------------------------------------------------------------------
 	// Implementation of HierarchicalBeanFactory interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public BeanFactory getParentBeanFactory() {
 		return null;
 	}
 
 	@Override
 	public boolean containsLocalBean(String name) {
 		return this.beanFactory.containsBean(name);
 	}
 
 	//---------------------------------------------------------------------
 	// Implementation of MessageSource interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public String getMessage(String code, Object args[], String defaultMessage, Locale locale) {
 		return this.messageSource.getMessage(code, args, defaultMessage, locale);
 	}
 
 	@Override
 	public String getMessage(String code, Object args[], Locale locale) throws NoSuchMessageException {
 		return this.messageSource.getMessage(code, args, locale);
 	}
 
 	@Override
 	public String getMessage(MessageSourceResolvable resolvable, Locale locale) throws NoSuchMessageException {
 		return this.messageSource.getMessage(resolvable, locale);
 	}
 
 	//---------------------------------------------------------------------
 	// Implementation of ResourceLoader interface
 	//---------------------------------------------------------------------
 
 	@Override
 	public ClassLoader getClassLoader() {
 		return null;
 	}
 
 	@Override
 	public Resource getResource(String location) {
 		return this.resourcePatternResolver.getResource(location);
 	}
 
 	//---------------------------------------------------------------------
 	// Other
 	//---------------------------------------------------------------------
 
 	@Override
 	public void publishEvent(ApplicationEvent event) {
 	}
 
 	@Override
 	public Resource[] getResources(String locationPattern) throws IOException {
 		return this.resourcePatternResolver.getResources(locationPattern);
 	}
 
 
 	/**
 	 * An extension of StaticListableBeanFactory that implements
 	 * AutowireCapableBeanFactory in order to allow bean initialization of
 	 * {@link ApplicationContextAware} singletons.
 	 */
 	private class StubBeanFactory extends StaticListableBeanFactory implements AutowireCapableBeanFactory {
 
 		@Override
 		public Object initializeBean(Object existingBean, String beanName) throws BeansException {
 			if (existingBean instanceof ApplicationContextAware) {
 				((ApplicationContextAware) existingBean).setApplicationContext(StubWebApplicationContext.this);
 			}
 			return existingBean;
 		}
 
 		@Override
 		public <T> T createBean(Class<T> beanClass) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		@SuppressWarnings("rawtypes")
 		public Object createBean(Class beanClass, int autowireMode, boolean dependencyCheck) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		@SuppressWarnings("rawtypes")
 		public Object autowire(Class beanClass, int autowireMode, boolean dependencyCheck) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public void autowireBean(Object existingBean) throws BeansException {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public void autowireBeanProperties(Object existingBean, int autowireMode, boolean dependencyCheck) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public Object configureBean(Object existingBean, String beanName) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public Object resolveDependency(DependencyDescriptor descriptor, String beanName) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public Object resolveDependency(DependencyDescriptor descriptor, String beanName,
 				Set<String> autowiredBeanNames, TypeConverter typeConverter) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public void applyBeanPropertyValues(Object existingBean, String beanName) throws BeansException {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public Object applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public Object applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName) {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
 		public void destroyBean(Object existingBean) {
 			throw new UnsupportedOperationException();
 		}
 	}
 
 }