/**
    * Copyright 2005-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.krad.document;
  
  import org.kuali.rice.kew.framework.postprocessor.ActionTakenEvent;
  import org.kuali.rice.kew.framework.postprocessor.DocumentRouteLevelChange;
  import org.kuali.rice.kew.framework.postprocessor.DocumentRouteStatusChange;
  import org.kuali.rice.kim.api.identity.Person;
  import org.kuali.rice.krad.bo.AdHocRoutePerson;
  import org.kuali.rice.krad.bo.AdHocRouteWorkgroup;
  import org.kuali.rice.krad.bo.DocumentHeader;
  import org.kuali.rice.krad.bo.Note;
  import org.kuali.rice.krad.bo.PersistableBusinessObject;
  import org.kuali.rice.krad.document.authorization.PessimisticLock;
  import org.kuali.rice.krad.exception.ValidationException;
  import org.kuali.rice.krad.rules.rule.event.KualiDocumentEvent;
  import org.kuali.rice.krad.service.DocumentSerializerService;
  import org.kuali.rice.krad.util.NoteType;
  import org.kuali.rice.krad.util.documentserializer.PropertySerializabilityEvaluator;
  import org.kuali.rice.krad.workflow.KualiDocumentXmlMaterializer;
  
  import java.util.List;
  import java.util.Map;
  
  
  /**
   * This is the Document interface. All entities that are regarded as "eDocs" in the system, including Maintenance documents and
   * Transaction Processing documents should implement this interface as it defines methods that are necessary to interact with the
   * underlying frameworks and components (i.e. notes, attachments, workflow, etc).
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public interface Document extends PersistableBusinessObject {
  	
      /**
       * This retrieves the standard <code>DocumentHeader</code> object, which contains standard meta-data about a document.
       * 
       * @return document header since all docs will have a document header
       */
      public DocumentHeader getDocumentHeader();
  
      /**
       * Sets the associated <code>DocumentHeader</code> for this document.
       * 
       * @param documentHeader
       */
      public void setDocumentHeader(DocumentHeader documentHeader);
  
      /**
       * All documents have a document header id. This is the quick accessor to that unique identifier and should return the same
       * value as documentHeader.getDocumentHeaderId().
       * 
       * @return doc header id
       */
      public String getDocumentNumber();
  
      /**
       * setter for document header id
       * 
       * @param documentHeaderId
       */
      public void setDocumentNumber(String documentHeaderId);
  
      /**
       * This is the method to integrate with workflow, where we will actually populate the workflow defined data structure(s) so that
       * workflow can routed based on this data. This method is responsible for passing over the proper Kuali (client system) data
       * that will be used by workflow to determine how the document is actually routed.
       */
      public void populateDocumentForRouting();
  
      /**
       * This is a method where we can get the xml of a document that the workflow system will use to base it's routing and search
       * attributes on.
       * 
       * @return the document serialized to an xml string
       */
      public String serializeDocumentToXml();
      
      /**
       * This method is used to get the xml that should be used in a Route Report.  In it's default implementation this will call the
       * methods prepareForSave() and populateDocumentForRouting().
       */
      public String getXmlForRouteReport();
      
      /**
       * method to integrate with workflow, where we will actually handle the transitions of levels for documents
      */
     public void doRouteLevelChange(DocumentRouteLevelChange levelChangeEvent);
     
     /**
      * method to integrate with workflow where we will be able to perform logic for an action taken being performed on a document
      */
     public void doActionTaken(ActionTakenEvent event);
     
     /**
      * This method will be called after the Workflow engine has completely finished processing a document.
      * 
      * @param successfullyProcessed - true if the document was processed successfully, false otherwise
      */
     public void afterWorkflowEngineProcess(boolean successfullyProcessed);
     
     /**
      * This method will be called before the Workflow engine has begun processing a document.
      */
     public void beforeWorkflowEngineProcess();
     
     /**
      * This method will be called before the Workflow engine has begun processing a document.
      */
     public List<String> getWorkflowEngineDocumentIdsToLock();
 
     /**
      * Getter method to get the document title as it will appear in and be searchable in workflow.
      */
     public String getDocumentTitle();
 
     /**
      * getter method to get the list of ad hoc route persons associated with a document at a point in time, this list is only valid
      * for a given users version of a document as this state is only persisted in workflow itself when someone takes an action on a
      * document
      */
     public List<AdHocRoutePerson> getAdHocRoutePersons();
 
     /**
      * getter method to get the list of ad hoc route workgroups associated with a document at a point in time, this list is only
      * valid for a given users version of a document as this state is only persisted in workflow itself when someone takes an action
      * on a document
      */
     public List<AdHocRouteWorkgroup> getAdHocRouteWorkgroups();
 
     /**
      * setter method to set the list of ad hoc route persons associated with a document at a point in time, this list is only valid
      * for a given users version of a document as this state is only persisted in workflow itself when someone takes an action on a
      * document
      * 
      * @param adHocRoutePersons
      */
     public void setAdHocRoutePersons(List<AdHocRoutePerson> adHocRoutePersons);
 
     /**
      * setter method to set the list of ad hoc route workgroups associated with a document at a point in time, this list is only
      * valid for a given users version of a document as this state is only persisted in workflow itself when someone takes an action
      * on a document
      * 
      * @param adHocRouteWorkgroups
      */
     public void setAdHocRouteWorkgroups(List<AdHocRouteWorkgroup> adHocRouteWorkgroups);
 
     /**
      * This method provides a hook that will be called before the document is saved. This method is useful for applying document
      * level data to children. For example, if someone changes data at the document level, and that data needs to be propagated to
      * child objects or child lists of objects, you can use this method to update the child object or iterate through the list of
      * child objects and apply the document level data to them. Any document that follows this paradigm will need to make use of
      * this method to apply all of those changes.
      */
     public void prepareForSave();
 
     /**
      * Sends document off to the rules engine to verify business rules.
      * 
      * @param event - indicates which document event was requested
      * @throws ValidationException - containing the MessageMap from the validation session.
      */
     public void validateBusinessRules(KualiDocumentEvent event);
     
     /**
      * Do any work on the document that requires the KualiDocumentEvent before the save.
      * 
      * @param event - indicates which document event was requested
      */
     public void prepareForSave(KualiDocumentEvent event);
     
     /**
      * Do any work on the document after the save.
      * 
      * @param event - indicates which document event was requested
      */
     public void postProcessSave(KualiDocumentEvent event);
     
     /**
      * This method provides a hook that will be called after a document is retrieved, but before it is returned from the
      * DocumentService.
      */
     public void processAfterRetrieve();
 
     /**
      * This method returns whether or not this document can be copied.
      * 
      * @return True if it can be copied, false if not.
      */
     public boolean getAllowsCopy();
     
     /**
      * Generate any necessary events required during the save event generation
      * 
      * @return a list of document events that were triggered by the save event
      */
     public List<KualiDocumentEvent> generateSaveEvents();
     
    /**
      * Handle the doRouteStatusChange event from the post processor
      * 
      */
     public void doRouteStatusChange(DocumentRouteStatusChange statusChangeEvent);
     
     /**
      * Returns the note type which should be used for notes associated with this document.
      * This method should never return null.
      * 
      * @return the note type supported by this document, this value should never be null
      */
     public NoteType getNoteType();
     
     /**
      * Return the target PersistableBusinessObject that notes associated with this document should be attached to.
      * In general, this method should never return null.  However, it is permissible that it will return a 
      * business object which has not been persisted yet (and therefore does not have it's unique object id
      * established).  This is only valid in cases where the note type is {@link NoteType#BUSINESS_OBJECT}.
      * 
      * In these cases it's the responsibility for implementers of the Document interface to handle storing transient
      * copies of the document notes (in XML or otherwise) until the underlying note target has been persisted and can be attached
      * to the document's notes via it's object id.
      * 
      * @return the PersistableBusinessObject with which notes on this document should be associated
      */
     public PersistableBusinessObject getNoteTarget();
     
     /**
      * Adds the given Note to the document's list of Notes.
      * 
      * @param note the Note to add, must be non-null
      */
     public void addNote(Note note);
     
     /**
      * Returns a mutable list of all notes on the document.
      * 
      * @return the list of notes associated with this document, if this document has no notes then an empty list will be returned
      */
     public List<Note> getNotes();
     
     /**
 	 * Sets the document's list of notes to the given list.
 	 * 
 	 * @param notes the list of notes to set on the document, must be non-null
 	 */
 	public void setNotes(List<Note> notes);
     
     /**
      * Retrieves the note at the given index.
      * 
      * @param index the zero-based index of the note to retrieve
      * @return the note located at the given index
      * @throws IndexOutOfBoundsException if the index is out of range
      */
     public Note getNote(int index);
     
     /**
      * Removes the given note from the document's list of notes.
      * 
      * @param note the note to remove from the document's list of notes, must be non-null
      * @return true if the note was successfully removed, false if the list did not contain the given note
      */
     public boolean removeNote(Note note);
     
     /**
      * This method gets a list of the {@link PessimisticLock} objects associated with this document
      * 
      */
     public List<PessimisticLock> getPessimisticLocks();
     
     /**
      * This method updates the list of {@link PessimisticLock} objects on the document if changes could
      * have been made
      */
     public void refreshPessimisticLocks();
     
     /**
      * This method adds a new {@link PessimisticLock} to the document
      * 
      * NOTE: LOCKS ADDED VIA THIS METHOD WILL NOT BE SAVED WITH THE DOCUMENT
      * 
      * @param lock - the lock to add to the document
      */
     public void addPessimisticLock(PessimisticLock lock);
     
     /**
      * This is a method that is used by Kuali Pessimistic Locking to get the names (method to call values)
      * of the {@link KualiDocumentActionBase} methods that should release locks
      * 
      * @return the list of method names of an action that should clear locks for the current user
      */
     public List<String> getLockClearningMethodNames();
     /**
      * Returns an evaluator object that determines whether a given property relative to the root object ({@link #wrapDocumentWithMetadataForXmlSerialization()}
      * is serializable during the document serialization process.
      * 
      * @return a fully initialized evaluator object, ready to be used for workflow routing
      * 
      * @see DocumentSerializerService
      * @see #wrapDocumentWithMetadataForXmlSerialization()
      */
     
     public String getBasePathToDocumentDuringSerialization();
     
     /**
      * Returns an evaluator object that determines whether a given property relative to the root object ({@link #wrapDocumentWithMetadataForXmlSerialization()}
      * is serializable during the document serialization process.
      * 
      * @return a fully initialized evaluator object, ready to be used for workflow routing
      * 
      * @see DocumentSerializerService
      * @see #wrapDocumentWithMetadataForXmlSerialization()
      */
     public PropertySerializabilityEvaluator getDocumentPropertySerizabilityEvaluator();
     
     /**
      * This method will return the root object to be serialized for workflow routing.  If necessary, this method will wrap this document object with a wrapper (i.e. contains a reference back to this document).  This
      * wrapper may also contain references to additional objects that provide metadata useful to the workflow engine.
      * 
      * If no wrappers are necessary, then this object may return "this"
      * 
      * @return a wrapper object (most likely containing a reference to "this"), or "this" itself.
      * @see KualiDocumentXmlMaterializer
      */
     public Object wrapDocumentWithMetadataForXmlSerialization();
     
     /**
      * This method returns whether or not this document supports custom lock descriptors for pessimistic locking.
      * 
      * @return True if the document can generate custom lock descriptors, false otherwise.
      * @see #getCustomLockDescriptor(Map, Person)
      */
     public boolean useCustomLockDescriptors();
     
     /**
      * Generates a custom lock descriptor for pessimistic locking. This method should not be called unless {@link #useCustomLockDescriptors()} returns true.
      * 
      * @param user The user trying to establish the lock.
      * @return A String representing the lock descriptor.
      * @see #useCustomLockDescriptors()
      * @see org.kuali.rice.krad.service.PessimisticLockService
      * @see org.kuali.rice.krad.service.impl.PessimisticLockServiceImpl
      */
     public String getCustomLockDescriptor(Person user);
 }