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/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.util.data.functions;

import static org.opencastproject.util.data.Tuple.tuple;

import org.opencastproject.util.data.Function;
import org.opencastproject.util.data.Tuple;

import java.util.List;

/** Functions for tuples. */
public final class Tuples {
  private Tuples() {
  }

  public static  Function> tupleA(final B b) {
    return new Function>() {
      @Override public Tuple apply(A a) {
        return tuple(a, b);
      }
    };
  }

  public static  Function> tupleB(final A a) {
    return new Function>() {
      @Override public Tuple apply(B b) {
        return tuple(a, b);
      }
    };
  }

  public static  Function> fromArray() {
    return new Function>() {
      @Override public Tuple apply(A[] as) {
        return tuple(as[0], as[1]);
      }
    };
  }

  public static  Function, Tuple> fromList() {
    return new Function, Tuple>() {
      @Override public Tuple apply(List as) {
        return tuple(as.get(0), as.get(1));
      }
    };
  }

  public static  Function arrayHasSize(final int size) {
    return new Function() {
      @Override public Boolean apply(A[] as) {
        return as.length == size;
      }
    };
  }

  public static  Function, Boolean> listHasSize(final int size) {
    return new Function, Boolean>() {
      @Override public Boolean apply(List as) {
        return as.size() == size;
      }
    };
  }
}