org.argeo.slc.spring/ext/test/org/argeo/slc/core/test/context/AbstractInternalSpringTestCase.java

   1 package org.argeo.slc.core.test.context;
   2
   3 import java.util.Map;
   4
   5 import junit.framework.TestCase;
   6
   7 import org.apache.commons.logging.Log;
   8 import org.apache.commons.logging.LogFactory;
   9 import org.argeo.slc.SlcException;
  10 import org.springframework.beans.factory.BeanFactoryUtils;
  11 import org.springframework.beans.factory.ListableBeanFactory;
  12 import org.springframework.context.ConfigurableApplicationContext;
  13 import org.springframework.context.support.ClassPathXmlApplicationContext;
  14
  15 /** Helper for tests using a Spring application context. */
  16 public abstract class AbstractInternalSpringTestCase extends TestCase {
  17         protected final Log log = LogFactory.getLog(getClass());
  18         private ConfigurableApplicationContext context;
  19
  20         /**
  21          * Gets (and create if necessary) the application context to use. Default
  22          * implementation uses a class path xml application context and calls
  23          * {@link #getApplicationContextLocation()}.
  24          */
  25         protected ConfigurableApplicationContext getContext() {
  26                 if (context == null) {
  27                         context = new ClassPathXmlApplicationContext(
  28                                         getApplicationContextLocation());
  29                 }
  30                 return context;
  31         }
  32
  33         /** Returns a bean from the underlying context */
  34         @SuppressWarnings(value = { "unchecked" })
  35         protected <T> T getBean(String beanId) {
  36                 return (T) getContext().getBean(beanId);
  37         }
  38
  39         protected <T> T getBean(Class<? extends T> clss) {
  40                 T bean = loadSingleFromContext(getContext(), clss);
  41                 if (bean == null) {
  42                         throw new SlcException("Cannot retrieve a unique bean of type "
  43                                         + clss);
  44                 } else {
  45                         return bean;
  46                 }
  47         }
  48
  49         /**
  50          * Th location of the application to load. The default implementation
  51          * returns <i>applicationContext.xml</i> found in the same package as the
  52          * test.
  53          */
  54         protected String getApplicationContextLocation() {
  55                 return inPackage("applicationContext.xml");
  56         }
  57
  58         /**
  59          * Prefixes the package of the class after converting the '.' to '/' in
  60          * order to have a resource path.
  61          */
  62         protected String inPackage(String suffix) {
  63                 String prefix = getClass().getPackage().getName().replace('.', '/');
  64                 return prefix + '/' + suffix;
  65         }
  66
  67         @SuppressWarnings(value = { "unchecked" })
  68         protected <T> T loadSingleFromContext(ListableBeanFactory context,
  69                         Class<T> clss) {
  70                 Map<String, T> beans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
  71                                 context, clss, false, false);
  72                 if (beans.size() == 1) {
  73                         return beans.values().iterator().next();
  74                 } else if (beans.size() > 1) {
  75                         if (log.isDebugEnabled()) {
  76                                 log
  77                                                 .debug(("Found more that on bean for type " + clss
  78                                                                 + ": " + beans.keySet()));
  79                         }
  80                         return null;
  81                 } else {
  82                         return null;
  83                 }
  84         }
  85
  86 }