package org.jboss.resteasy.extension.systemproperties.container;

import java.io.InputStream;
import java.util.Map;
import java.util.Properties;

import org.jboss.arquillian.core.api.annotation.Observes;
import org.jboss.arquillian.test.spi.event.suite.AfterSuite;
import org.jboss.arquillian.test.spi.event.suite.BeforeSuite;
import org.jboss.resteasy.extension.systemproperties.SystemProperties;

/**
 * SystemPropertiesLoader
 *
 * @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
 * @author <a href="mailto:alessio.soldano@jboss.com">Alessio Soldano</a>
 * @version $Revision: $
 */
public class SystemPropertiesLoader {
   public void setProperties(@Observes BeforeSuite event) {
      Properties props = load(SystemProperties.FILE_NAME);
      if (props != null) {
         for (Map.Entry<Object, Object> entry : props.entrySet()) {
            System.setProperty(entry.getKey().toString(), entry.getValue()
                  .toString());
         }
      }
   }

   public void unsetProperties(@Observes AfterSuite event) {
      Properties props = load(SystemProperties.FILE_NAME);
      if (props != null) {
         for (Map.Entry<Object, Object> entry : props.entrySet()) {
            System.clearProperty(entry.getKey().toString());
         }
      }
   }

   private Properties load(String resource) {
      InputStream propsStream = Thread.currentThread()
            .getContextClassLoader().getResourceAsStream(resource);
      if (propsStream != null) {
         Properties props = new Properties();
         try {
            props.load(propsStream);
            return props;
         } catch (Exception e) {
            throw new RuntimeException("Could not load properties", e);
         }
      }
      return null;
   }
}
