uimaj-json/src/main/java/org/apache/uima/json/jsoncas2/model/FeatureStructures.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.json.jsoncas2.model;

import static java.util.stream.Collectors.toList;

import java.util.Collection;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;

import org.apache.uima.cas.FeatureStructure;

public class FeatureStructures implements Iterable<FeatureStructure> {
  private final List<FeatureStructure> featureStructures;

  public FeatureStructures(Collection<FeatureStructure> aFeatureStructures) {
    featureStructures = aFeatureStructures.stream() //
            .sorted(Comparator.comparing(fs -> {
              return fs.getType().getName();
            })) //
            .collect(toList());
  }

  @Override
  public Iterator<FeatureStructure> iterator() {
    return featureStructures.iterator();
  }

  public boolean isEmpty() {
    return featureStructures.isEmpty();
  }
}