package com.atlassian.plugin.osgi.factory.transform.model;
   
   import com.atlassian.plugin.PluginParseException;
   import org.dom4j.Element;
   
   import java.util.LinkedHashSet;
   import java.util.List;
   import java.util.Set;
   
  import static com.atlassian.plugin.util.validation.ValidationPattern.createPattern;
  import static com.atlassian.plugin.util.validation.ValidationPattern.test;
  import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * Represents the data in a component-import tag in the plugin descriptor
   *
   * @since 2.2.0
   */
  public class ComponentImport {
      private final String key;
      private final Set<String> interfaces;
      private final String filter;
      private final Element source;
  
      public ComponentImport(Element element) throws PluginParseException {
          checkNotNull(element);
          createPattern().
                  rule(
                          test("@key").withError("The key is required"),
                          test("(@interface and string-length(@interface) > 0) or (interface and string-length(interface[1]) > 0)")
                                  .withError("The interface must be specified either via the 'interface'" +
                                          "attribute or child 'interface' elements")).
                  evaluate(element);
  
          this.source = element;
          this.key = element.attributeValue("key").trim();
          final String filter = element.attributeValue("filter");
          this.filter = filter != null ? filter.trim() : null;
          this.interfaces = new LinkedHashSet<>();
          if (element.attribute("interface") != null) {
              interfaces.add(element.attributeValue("interface").trim());
          } else {
              List<Element> compInterfaces = element.elements("interface");
              for (Element inf : compInterfaces) {
                  interfaces.add(inf.getTextTrim());
              }
          }
      }
  
      public String getKey() {
          return key;
      }
  
      public Set<String> getInterfaces() {
          return interfaces;
      }
  
      public Element getSource() {
          return source;
      }
  
      /**
       * @return The configured ldap filter
       * @since 2.3.0
       */
      public String getFilter() {
          return filter;
      }
  }