package com.atlassian.plugin.descriptors;
   
   import java.util.Collection;
   
   import com.atlassian.plugin.ModuleDescriptor;
   import com.atlassian.plugin.ModuleDescriptorFactory;
   import com.atlassian.plugin.PluginParseException;
   
   /**
   * Module descriptor factory that checks multiple factories in sequence.  There is no attempt at caching the results.
   * @since 2.1
   */
  public class ChainModuleDescriptorFactory implements ModuleDescriptorFactory
  {
      private final ModuleDescriptorFactory[] factories;
  
      public ChainModuleDescriptorFactory(final ModuleDescriptorFactory... factories)
      {
          this.factories = factories;
      }
  
      public ChainModuleDescriptorFactory(Collection<? extends ModuleDescriptorFactory> factories)
      {
          this(factories.toArray(new ModuleDescriptorFactory[factories.size()]));
      }
  
      public ModuleDescriptor<?> getModuleDescriptor(final String type) throws PluginParseException, IllegalAccessException, InstantiationException, ClassNotFoundException
      {
          for (final ModuleDescriptorFactory factory : factories)
          {
              if (factory.hasModuleDescriptor(type))
              {
                  return factory.getModuleDescriptor(type);
              }
          }
          return null;
      }
  
      public boolean hasModuleDescriptor(final String type)
      {
          for (final ModuleDescriptorFactory factory : factories)
          {
              if (factory.hasModuleDescriptor(type))
              {
                  return true;
              }
          }
          return false;
      }
  
      public Class<? extends ModuleDescriptor> getModuleDescriptorClass(final String type)
      {
          for (final ModuleDescriptorFactory factory : factories)
          {
              final Class<? extends ModuleDescriptor> descriptorClass = factory.getModuleDescriptorClass(type);
              if (descriptorClass != null)
              {
                  return descriptorClass;
              }
          }
          return null;
      }
  }