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TypeGroupedContentProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache 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.apache.org/licenses/LICENSE-2.0
 *
 * 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.apache.uima.caseditor.editor.outline;

import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.uima.cas.CAS;
import org.apache.uima.cas.FSIterator;
import org.apache.uima.cas.Type;
import org.apache.uima.cas.TypeSystem;
import org.apache.uima.cas.text.AnnotationFS;
import org.apache.uima.cas.text.AnnotationIndex;
import org.apache.uima.caseditor.CasEditorPlugin;
import org.apache.uima.caseditor.editor.AnnotationEditor;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Display;

/**
 * The content provider for the type grouped annotation outline.
 * 
 * TODO:
 * Make it sensitive to show annotations menu from the editor ...
 * Who sends selection events which are not from the UI thread ?
 */
00047 public class TypeGroupedContentProvider extends OutlineContentProviderBase {

      // map of AnnotationTypeTreeNode
      private Map<String, AnnotationTypeTreeNode> nameAnnotationTypeNodeMap = 
                  new HashMap<String, AnnotationTypeTreeNode>();

      TypeGroupedContentProvider(AnnotationEditor editor, TreeViewer viewer) {
            super(editor, viewer);
      }
      
      @Override
      protected void addedAnnotation(Collection<AnnotationFS> annotations) {

            for (AnnotationFS annotation : annotations) {
                  String name = annotation.getType().getName();

                  AnnotationTypeTreeNode typeNode = nameAnnotationTypeNodeMap
                              .get(name);

                  AnnotationTreeNode annotationNode = new AnnotationTreeNode(mInputDocument, annotation); 
                  typeNode.add(annotationNode);
                  
                  viewer.add(typeNode, annotationNode);
            }
      }

      @Override
      protected void removedAnnotation(Collection<AnnotationFS> annotations) {

        Set<AnnotationTreeNode> removeAnnotations = new HashSet<AnnotationTreeNode>();
        
            for (AnnotationFS annotation : annotations) {
                  String name = annotation.getType().getName();

                  AnnotationTypeTreeNode typeNode = nameAnnotationTypeNodeMap.get(name);
                  
                  if (typeNode != null) {
                  AnnotationTreeNode annotationNode = new AnnotationTreeNode(mInputDocument, annotation); 
                  typeNode.remove(annotationNode);
                  
                  removeAnnotations.add(annotationNode);
                  }
                  else {
                    CasEditorPlugin.logError("Unmapped annotation type!");
                  }
            }
            
            viewer.remove(removeAnnotations.toArray());
      }

      public Object[] getElements(Object inputElement) {
      
            return nameAnnotationTypeNodeMap.values().toArray();
      }

      public Object getParent(Object element) {
      
            if (element instanceof AnnotationTreeNode) {
                  AnnotationTreeNode annotation = (AnnotationTreeNode) element;
            
                  Type type = annotation.getAnnotation().getType();
            
                  if (type != null) {
                        return nameAnnotationTypeNodeMap.get(type.getName());
                  }
                  else {
                        // Can happen when a changed request was triggered after
                        // a CAS.reset(), in this case it is not possible to find a 
                        // parent for the element and null should be returned.
                        return null;
                  }
            }
            else if (element instanceof AnnotationTypeTreeNode) {
                  // The head type elements to not have a parent
                  return null;
            }
            else {
                  CasEditorPlugin.logError("TypeGroupedContentProvider: Unexpected type " + element.getClass().getName());
                  return null;
            }
      }

      public boolean hasChildren(Object element) {
            if (element instanceof AnnotationTypeTreeNode) {
                  AnnotationTypeTreeNode treeNode = (AnnotationTypeTreeNode) element;
                  
                  return treeNode.getAnnotations().length > 0;
            } else {
                  return false;
            }
      }

      public Object[] getChildren(Object parentElement) {

            AnnotationTypeTreeNode typeNode = (AnnotationTypeTreeNode) parentElement;

            return typeNode.getAnnotations();
      }


00147       public void changed() {
            nameAnnotationTypeNodeMap.clear();
            
            TypeSystem typeSystem = mInputDocument.getCAS().getTypeSystem();
            
            List<Type> types = typeSystem.getProperlySubsumedTypes(
                        typeSystem.getType(CAS.TYPE_NAME_ANNOTATION));
            
            types.add(typeSystem.getType(CAS.TYPE_NAME_ANNOTATION));
            
            for (Type type : types) {
                  
                  AnnotationTypeTreeNode typeNode = new AnnotationTypeTreeNode(type);
                  
                  nameAnnotationTypeNodeMap.put(type.getName(), typeNode);
                  
                  CAS cas = mInputDocument.getCAS();
                  
                  AnnotationIndex<AnnotationFS> index = cas.getAnnotationIndex(type);
                  
                  for (FSIterator<AnnotationFS> it = index.iterator(); it.hasNext(); ) {
                        AnnotationFS annotation = it.next();
                        
                        if (annotation.getType().equals(type)) {
                          typeNode.add(new AnnotationTreeNode(mInputDocument, annotation));
                        }
                  }
            }

      Display.getDefault().syncExec(new Runnable() {
        public void run() {
            viewer.refresh();
        }
      });
      }
}

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