trunk/ruta-ep-caseditor/src/main/java/org/apache/uima/ruta/caseditor/view/tree/FSTreeNode.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.ruta.caseditor.view.tree;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.uima.cas.ArrayFS;
import org.apache.uima.cas.Feature;
import org.apache.uima.cas.FeatureStructure;
import org.apache.uima.cas.Type;
import org.apache.uima.cas.text.AnnotationFS;
import org.eclipse.core.runtime.IAdaptable;

public class FSTreeNode extends AbstractTreeNode implements IAdaptable {

  protected FeatureStructure fs;

  public FSTreeNode(ITreeNode parent, FeatureStructure annotation) {
    this(parent, annotation, new ArrayList<Type>());
  }

  public FSTreeNode(ITreeNode parent, FeatureStructure annotation, List<Type> parentTypes) {
    super(parent);
    this.fs = annotation;
    parentTypes.add(fs.getType());
    for (Feature f : annotation.getType().getFeatures()) {
      addFeatures(this, f, annotation, parentTypes);
    }
  }

  public String getName() {
    return fs.getType().getShortName();
  }

  public Type getType() {
    return fs.getType();
  }

  public void addFeatures(ITreeNode parent, Feature f, FeatureStructure featureStructure,
          List<Type> parentTypes) {
    if (f.getRange().isArray()) {
      FeatureStructure featureValue = featureStructure.getFeatureValue(f);
      if (featureValue instanceof ArrayFS) {
        ArrayFS array = (ArrayFS) featureValue;
        if (array != null) {
          String text = "Array" + "[" + array.size() + "]";
          PrimitiveFeatureTreeNode arrayNode = new PrimitiveFeatureTreeNode(this, f, text);
          parent.addChild(arrayNode);
          int size = array.size();
          for (int i = 0; i < size; i++) {
            FeatureStructure fs = array.get(i);
            if (fs instanceof FeatureStructure) {
              Type fsType = fs.getType();
              if (expandable(fsType, parentTypes)) {
                ITreeNode fsNode;
                if (fs instanceof AnnotationFS) {
                  AnnotationFS faa = (AnnotationFS) fs;
                  fsNode = new AnnotationTreeNode(arrayNode, faa, parentTypes);
                } else {
                  fsNode = new TypeTreeNode(arrayNode, fsType);
                }
                arrayNode.addChild(fsNode);
              }
            }
          }
        }
      }
    } else if (f.getRange().isPrimitive()) {
      if ("uima.cas.AnnotationBase:sofa".equals(f.getName())) {
      } else {
        parent.addChild(new PrimitiveFeatureTreeNode(this, f, featureStructure
                .getFeatureValueAsString(f)));
      }
    } else if (f.getRange() instanceof Type) {
      FeatureStructure featureValue = featureStructure.getFeatureValue(f);
      if (featureValue instanceof AnnotationFS && expandable(featureValue.getType(), parentTypes)) {
        parent.addChild(new FSFeatureTreeNode(this, f, featureValue, parentTypes));
      }
    }
  }

  private boolean expandable(Type type, List<Type> parentTypes) {
    int frequency = Collections.frequency(parentTypes, type);
    return frequency < 5;
  }

  public Object getAdapter(Class adapter) {
    if (FSTreeNode.class.equals(adapter)) {
      return this;
    } else if (FeatureStructure.class.equals(adapter)) {
      return fs;

    }
    return null;
  }

}