/*
 * 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.utils;

import java.util.ArrayList;
import java.util.List;

import org.apache.uima.cas.FeatureStructure;
import org.apache.uima.jcas.JCas;
import org.apache.uima.jcas.cas.DoubleArray;
import org.apache.uima.jcas.cas.FSArray;
import org.apache.uima.jcas.cas.IntegerArray;
import org.apache.uima.jcas.cas.StringArray;

public class UIMAUtils {

  public static FSArray toFSArray(JCas jCas, List<? extends FeatureStructure> fsList) {
    FSArray fsArray = new FSArray(jCas, fsList.size());
    fsArray.copyFromArray(fsList.toArray(new FeatureStructure[fsList.size()]), 0, 0, fsList.size());
    return fsArray;
  }

  public static StringArray toStringArray(JCas jCas, String[] sArray) {
    StringArray uimaSArray = new StringArray(jCas, sArray.length);
    uimaSArray.copyFromArray(sArray, 0, 0, sArray.length);
    return uimaSArray;
  }

  public static DoubleArray toDoubleArray(JCas jCas, double[] sArray) {
    DoubleArray uimaSArray = new DoubleArray(jCas, sArray.length);
    uimaSArray.copyFromArray(sArray, 0, 0, sArray.length);
    return uimaSArray;
  }

  public static IntegerArray toIntegerArray(JCas jCas, int[] sArray) {
    IntegerArray uimaSArray = new IntegerArray(jCas, sArray.length);
    uimaSArray.copyFromArray(sArray, 0, 0, sArray.length);
    return uimaSArray;
  }

  public static <T extends FeatureStructure> List<T> toList(FSArray fsArray, Class<T> cls) {
    List<T> list = new ArrayList<T>();
    if (fsArray == null) {
      return list;
    }
    for (FeatureStructure fs : fsArray.toArray()) {
      list.add(cls.cast(fs));
    }
    return list;

  }

}