Java tutorial
/* * Copyright 2002-2016 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.context.expression; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.Reader; import java.io.Serializable; import java.net.URI; import java.net.URL; import java.security.AccessControlException; import java.security.Permission; import java.util.Properties; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.Test; import org.springframework.beans.factory.ObjectFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.beans.factory.annotation.Value; import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer; import org.springframework.beans.factory.config.Scope; import org.springframework.beans.factory.config.TypedStringValue; import org.springframework.beans.factory.support.AutowireCandidateQualifier; import org.springframework.beans.factory.support.DefaultListableBeanFactory; import org.springframework.beans.factory.support.GenericBeanDefinition; import org.springframework.beans.factory.support.RootBeanDefinition; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import org.springframework.context.annotation.AnnotationConfigUtils; import org.springframework.context.support.GenericApplicationContext; import org.springframework.core.convert.converter.Converter; import org.springframework.core.convert.support.GenericConversionService; import org.springframework.core.io.ClassPathResource; import org.springframework.core.io.Resource; import org.springframework.core.io.support.EncodedResource; import org.springframework.tests.Assume; import org.springframework.tests.TestGroup; import org.springframework.tests.sample.beans.TestBean; import org.springframework.util.FileCopyUtils; import org.springframework.util.SerializationTestUtils; import org.springframework.util.StopWatch; import static org.junit.Assert.*; /** * @author Juergen Hoeller * @author Sam Brannen * @since 3.0 */ public class ApplicationContextExpressionTests { private static final Log factoryLog = LogFactory.getLog(DefaultListableBeanFactory.class); @Test public void genericApplicationContext() throws Exception { GenericApplicationContext ac = new GenericApplicationContext(); AnnotationConfigUtils.registerAnnotationConfigProcessors(ac); ac.getBeanFactory().registerScope("myScope", new Scope() { @Override public Object get(String name, ObjectFactory<?> objectFactory) { return objectFactory.getObject(); } @Override public Object remove(String name) { return null; } @Override public void registerDestructionCallback(String name, Runnable callback) { } @Override public Object resolveContextualObject(String key) { if (key.equals("mySpecialAttr")) { return "42"; } else { return null; } } @Override public String getConversationId() { return null; } }); PropertyPlaceholderConfigurer ppc = new PropertyPlaceholderConfigurer(); Properties placeholders = new Properties(); placeholders.setProperty("code", "123"); ppc.setProperties(placeholders); ac.addBeanFactoryPostProcessor(ppc); GenericBeanDefinition bd0 = new GenericBeanDefinition(); bd0.setBeanClass(TestBean.class); bd0.getPropertyValues().add("name", "myName"); bd0.addQualifier(new AutowireCandidateQualifier(Qualifier.class, "original")); ac.registerBeanDefinition("tb0", bd0); GenericBeanDefinition bd1 = new GenericBeanDefinition(); bd1.setBeanClassName("#{tb0.class}"); bd1.setScope("myScope"); bd1.getConstructorArgumentValues().addGenericArgumentValue("XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ"); bd1.getConstructorArgumentValues().addGenericArgumentValue("#{mySpecialAttr}"); ac.registerBeanDefinition("tb1", bd1); GenericBeanDefinition bd2 = new GenericBeanDefinition(); bd2.setBeanClassName("#{tb1.class.name}"); bd2.setScope("myScope"); bd2.getPropertyValues().add("name", "{ XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ }"); bd2.getPropertyValues().add("age", "#{mySpecialAttr}"); bd2.getPropertyValues().add("country", "${code} #{systemProperties.country}"); ac.registerBeanDefinition("tb2", bd2); GenericBeanDefinition bd3 = new GenericBeanDefinition(); bd3.setBeanClass(ValueTestBean.class); bd3.setScope("myScope"); ac.registerBeanDefinition("tb3", bd3); GenericBeanDefinition bd4 = new GenericBeanDefinition(); bd4.setBeanClass(ConstructorValueTestBean.class); bd4.setScope("myScope"); ac.registerBeanDefinition("tb4", bd4); GenericBeanDefinition bd5 = new GenericBeanDefinition(); bd5.setBeanClass(MethodValueTestBean.class); bd5.setScope("myScope"); ac.registerBeanDefinition("tb5", bd5); GenericBeanDefinition bd6 = new GenericBeanDefinition(); bd6.setBeanClass(PropertyValueTestBean.class); bd6.setScope("myScope"); ac.registerBeanDefinition("tb6", bd6); System.getProperties().put("country", "UK"); try { ac.refresh(); TestBean tb0 = ac.getBean("tb0", TestBean.class); TestBean tb1 = ac.getBean("tb1", TestBean.class); assertEquals("XXXmyNameYYY42ZZZ", tb1.getName()); assertEquals(42, tb1.getAge()); TestBean tb2 = ac.getBean("tb2", TestBean.class); assertEquals("{ XXXmyNameYYY42ZZZ }", tb2.getName()); assertEquals(42, tb2.getAge()); assertEquals("123 UK", tb2.getCountry()); ValueTestBean tb3 = ac.getBean("tb3", ValueTestBean.class); assertEquals("XXXmyNameYYY42ZZZ", tb3.name); assertEquals(42, tb3.age); assertEquals(42, tb3.ageFactory.getObject().intValue()); assertEquals("123 UK", tb3.country); assertEquals("123 UK", tb3.countryFactory.getObject()); System.getProperties().put("country", "US"); assertEquals("123 UK", tb3.country); assertEquals("123 US", tb3.countryFactory.getObject()); System.getProperties().put("country", "UK"); assertEquals("123 UK", tb3.country); assertEquals("123 UK", tb3.countryFactory.getObject()); assertSame(tb0, tb3.tb); tb3 = (ValueTestBean) SerializationTestUtils.serializeAndDeserialize(tb3); assertEquals("123 UK", tb3.countryFactory.getObject()); ConstructorValueTestBean tb4 = ac.getBean("tb4", ConstructorValueTestBean.class); assertEquals("XXXmyNameYYY42ZZZ", tb4.name); assertEquals(42, tb4.age); assertEquals("123 UK", tb4.country); assertSame(tb0, tb4.tb); MethodValueTestBean tb5 = ac.getBean("tb5", MethodValueTestBean.class); assertEquals("XXXmyNameYYY42ZZZ", tb5.name); assertEquals(42, tb5.age); assertEquals("123 UK", tb5.country); assertSame(tb0, tb5.tb); PropertyValueTestBean tb6 = ac.getBean("tb6", PropertyValueTestBean.class); assertEquals("XXXmyNameYYY42ZZZ", tb6.name); assertEquals(42, tb6.age); assertEquals("123 UK", tb6.country); assertSame(tb0, tb6.tb); } finally { System.getProperties().remove("country"); } } @Test public void prototypeCreationReevaluatesExpressions() { GenericApplicationContext ac = new GenericApplicationContext(); AnnotationConfigUtils.registerAnnotationConfigProcessors(ac); GenericConversionService cs = new GenericConversionService(); cs.addConverter(String.class, String.class, new Converter<String, String>() { @Override public String convert(String source) { return source.trim(); } }); ac.getBeanFactory().registerSingleton(GenericApplicationContext.CONVERSION_SERVICE_BEAN_NAME, cs); RootBeanDefinition rbd = new RootBeanDefinition(PrototypeTestBean.class); rbd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE); rbd.getPropertyValues().add("country", "#{systemProperties.country}"); rbd.getPropertyValues().add("country2", new TypedStringValue("-#{systemProperties.country}-")); ac.registerBeanDefinition("test", rbd); ac.refresh(); try { System.getProperties().put("name", "juergen1"); System.getProperties().put("country", " UK1 "); PrototypeTestBean tb = (PrototypeTestBean) ac.getBean("test"); assertEquals("juergen1", tb.getName()); assertEquals("UK1", tb.getCountry()); assertEquals("-UK1-", tb.getCountry2()); System.getProperties().put("name", "juergen2"); System.getProperties().put("country", " UK2 "); tb = (PrototypeTestBean) ac.getBean("test"); assertEquals("juergen2", tb.getName()); assertEquals("UK2", tb.getCountry()); assertEquals("-UK2-", tb.getCountry2()); } finally { System.getProperties().remove("name"); System.getProperties().remove("country"); } } @Test public void prototypeCreationIsFastEnough() { Assume.group(TestGroup.PERFORMANCE); Assume.notLogging(factoryLog); GenericApplicationContext ac = new GenericApplicationContext(); RootBeanDefinition rbd = new RootBeanDefinition(TestBean.class); rbd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE); rbd.getConstructorArgumentValues().addGenericArgumentValue("#{systemProperties.name}"); rbd.getPropertyValues().add("country", "#{systemProperties.country}"); ac.registerBeanDefinition("test", rbd); ac.refresh(); StopWatch sw = new StopWatch(); sw.start("prototype"); System.getProperties().put("name", "juergen"); System.getProperties().put("country", "UK"); try { for (int i = 0; i < 100000; i++) { TestBean tb = (TestBean) ac.getBean("test"); assertEquals("juergen", tb.getName()); assertEquals("UK", tb.getCountry()); } sw.stop(); } finally { System.getProperties().remove("country"); System.getProperties().remove("name"); } assertTrue("Prototype creation took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 6000); } @Test public void systemPropertiesSecurityManager() { GenericApplicationContext ac = new GenericApplicationContext(); AnnotationConfigUtils.registerAnnotationConfigProcessors(ac); GenericBeanDefinition bd = new GenericBeanDefinition(); bd.setBeanClass(TestBean.class); bd.getPropertyValues().add("country", "#{systemProperties.country}"); ac.registerBeanDefinition("tb", bd); SecurityManager oldSecurityManager = System.getSecurityManager(); try { System.setProperty("country", "NL"); SecurityManager securityManager = new SecurityManager() { @Override public void checkPropertiesAccess() { throw new AccessControlException("Not Allowed"); } @Override public void checkPermission(Permission perm) { // allow everything else } }; System.setSecurityManager(securityManager); ac.refresh(); TestBean tb = ac.getBean("tb", TestBean.class); assertEquals("NL", tb.getCountry()); } finally { System.setSecurityManager(oldSecurityManager); System.getProperties().remove("country"); } } @Test public void stringConcatenationWithDebugLogging() { GenericApplicationContext ac = new GenericApplicationContext(); AnnotationConfigUtils.registerAnnotationConfigProcessors(ac); GenericBeanDefinition bd = new GenericBeanDefinition(); bd.setBeanClass(String.class); bd.getConstructorArgumentValues() .addGenericArgumentValue("test-#{ T(java.lang.System).currentTimeMillis() }"); ac.registerBeanDefinition("str", bd); ac.refresh(); String str = ac.getBean("str", String.class); assertTrue(str.startsWith("test-")); } @Test public void resourceInjection() throws IOException { System.setProperty("logfile", "do_not_delete_me.txt"); try (AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext( ResourceInjectionBean.class)) { ResourceInjectionBean resourceInjectionBean = ac.getBean(ResourceInjectionBean.class); Resource resource = new ClassPathResource("do_not_delete_me.txt"); assertEquals(resource, resourceInjectionBean.resource); assertEquals(resource.getURL(), resourceInjectionBean.url); assertEquals(resource.getURI(), resourceInjectionBean.uri); assertEquals(resource.getFile(), resourceInjectionBean.file); assertArrayEquals(FileCopyUtils.copyToByteArray(resource.getInputStream()), FileCopyUtils.copyToByteArray(resourceInjectionBean.inputStream)); assertEquals(FileCopyUtils.copyToString(new EncodedResource(resource).getReader()), FileCopyUtils.copyToString(resourceInjectionBean.reader)); } finally { System.getProperties().remove("logfile"); } } @SuppressWarnings("serial") public static class ValueTestBean implements Serializable { @Autowired @Value("XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ") public String name; @Autowired @Value("#{mySpecialAttr}") public int age; @Value("#{mySpecialAttr}") public ObjectFactory<Integer> ageFactory; @Value("${code} #{systemProperties.country}") public String country; @Value("${code} #{systemProperties.country}") public ObjectFactory<String> countryFactory; @Autowired @Qualifier("original") public transient TestBean tb; } public static class ConstructorValueTestBean { public String name; public int age; public String country; public TestBean tb; @Autowired public ConstructorValueTestBean(@Value("XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ") String name, @Value("#{mySpecialAttr}") int age, @Qualifier("original") TestBean tb, @Value("${code} #{systemProperties.country}") String country) { this.name = name; this.age = age; this.country = country; this.tb = tb; } } public static class MethodValueTestBean { public String name; public int age; public String country; public TestBean tb; @Autowired public void configure(@Qualifier("original") TestBean tb, @Value("XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ") String name, @Value("#{mySpecialAttr}") int age, @Value("${code} #{systemProperties.country}") String country) { this.name = name; this.age = age; this.country = country; this.tb = tb; } } public static class PropertyValueTestBean { public String name; public int age; public String country; public TestBean tb; @Value("XXX#{tb0.name}YYY#{mySpecialAttr}ZZZ") public void setName(String name) { this.name = name; } @Value("#{mySpecialAttr}") public void setAge(int age) { this.age = age; } @Value("${code} #{systemProperties.country}") public void setCountry(String country) { this.country = country; } @Autowired @Qualifier("original") public void setTb(TestBean tb) { this.tb = tb; } } public static class PrototypeTestBean { public String name; public String country; public String country2; @Value("#{systemProperties.name}") public void setName(String name) { this.name = name; } public String getName() { return name; } public void setCountry(String country) { this.country = country; } public String getCountry() { return country; } public void setCountry2(String country2) { this.country2 = country2; } public String getCountry2() { return country2; } } public static class ResourceInjectionBean { @Value("classpath:#{systemProperties.logfile}") Resource resource; @Value("classpath:#{systemProperties.logfile}") URL url; @Value("classpath:#{systemProperties.logfile}") URI uri; @Value("classpath:#{systemProperties.logfile}") File file; @Value("classpath:#{systemProperties.logfile}") InputStream inputStream; @Value("classpath:#{systemProperties.logfile}") Reader reader; } }