package com.habuma.restfun;public class MagicBean {}

package com.habuma.restfun;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;@Configuration
public class MagicConfig {@Bean@Conditional(MagicExistsCondition.class)public MagicBean magicBean() {return new MagicBean();}}

package com.habuma.restfun;import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotatedTypeMetadata;public class MagicExistsCondition implements Condition {@Overridepublic boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {Environment env = context.getEnvironment();return env.containsProperty("magic");}}

 1 package com.habuma.restfun;
 2
 3 import static org.junit.Assert.*;
 4
 5 import org.junit.Test;
 6 import org.junit.runner.RunWith;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.context.ApplicationContext;
 9 import org.springframework.test.context.ContextConfiguration;
10 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
11
12 @RunWith(SpringJUnit4ClassRunner.class)
13 @ContextConfiguration(classes=MagicConfig.class)
14 public class MagicExistsTest {
15
16   @Autowired
17   private ApplicationContext context;
18
19   /*
20    * This test will fail until you set a "magic" property.
21    * You can set this property as an environment variable, a JVM system property, by adding a @BeforeClass
22    * method and calling System.setProperty() or one of several other options.
23    */
24   @Test
25   public void shouldNotBeNull() {
26     assertTrue(context.containsBean("magicBean"));
27   }
28
29 }

1 @Retention(RetentionPolicy.RUNTIME)
2 @Target({ElementType.TYPE, ElementType.METHOD})
3 @Documented
4 @Conditional(ProfileCondition.class)
5 public @interface Profile {
6     String[] value();
7 }

 1 class ProfileCondition implements Condition {
 2     public boolean matches(
 3         ConditionContext context, AnnotatedTypeMetadata metadata) {
 4         if (context.getEnvironment() != null) {
 5             MultiValueMap < String, Object > attrs =
 6                 metadata.getAllAnnotationAttributes(Profile.class.getName());
 7             if (attrs != null) {
 8                 for (Object value: attrs.get("value")) {
 9                     if (context.getEnvironment()
10                         .acceptsProfiles(((String[]) value))) {
11                         return true;
12                     }
13                 }
14                 return false;
15             }
16         }
17         return true;
18     }
19 }