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/*
 * -\-\-
 * DataEnum
 * --
 * Copyright (c) 2017 Spotify AB
 * --
 * Licensed 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 com.spotify.dataenum.processor.util;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

public class Iterables {
  public static  boolean contains(Iterable iterable, T value) {
    for (T t : iterable) {
      if (t.equals(value)) return true;
    }
    return false;
  }

  public static  boolean isEmpty(Iterable iterable) {
    return !iterable.iterator().hasNext();
  }

  @SuppressWarnings("unchecked")
  public static  T[] toArray(Iterable iterable, Class tClass) {
    List out = new ArrayList<>();
    for (T value : iterable) {
      out.add(value);
    }
    return out.toArray((T[]) Array.newInstance(tClass, out.size()));
  }

  public static  int sizeOf(Iterable iterable) {
    int size = 0;

    for (T entry : iterable) {
      size++;
    }

    return size;
  }
}