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/**
 * Copyright © 2013 Sven Ruppert ([email protected])
 *
 * 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 repacked.com.google.common.collect;

import repacked.com.google.common.base.Function;

import javax.annotation.Nullable;
import java.util.AbstractCollection;
import java.util.Collection;
import java.util.Iterator;


/**
 * Copyright (C) 2010 RapidPM
 * 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.
 * 
 * Created by RapidPM - Team on 19.09.16.
 */
public class Collections2 {

  private Collections2() {
  }

  public static  Collection transform(
      Collection fromCollection , Function function) {
    return new TransformedCollection<>(fromCollection , function);
  }

  static boolean safeContains(Collection collection , @Nullable Object object) {
    try {
      return collection.contains(object);
    } catch (ClassCastException | NullPointerException e) {
      return false;
    }
  }

  static class TransformedCollection extends AbstractCollection {
    final Collection                    fromCollection;
    final Function function;

    TransformedCollection(Collection fromCollection , Function function) {
      this.fromCollection = fromCollection;
      this.function = function;
    }

    @Override
    public void clear() {
      fromCollection.clear();
    }

    @Override
    public boolean isEmpty() {
      return fromCollection.isEmpty();
    }

    @Override
    public Iterator iterator() {
      return Iterators.transform(fromCollection.iterator() , function);
    }

    @Override
    public int size() {
      return fromCollection.size();
    }
  }

}