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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.assetmanager.impl;

import org.opencastproject.security.api.UnauthorizedException;
import org.opencastproject.util.data.Either;

import com.entwinemedia.fn.Fn;
import com.entwinemedia.fn.data.Opt;

/**
 * A protected resource.
 */
public final class Protected {
  private final Either wrapped;

  public Protected(Either wrapped) {
    this.wrapped = wrapped;
  }

  public static  Protected granted(A a) {
    return new Protected(Either.right(a));
  }

  public static  Protected rejected(UnauthorizedException e) {
    return new Protected(Either.left(e));
  }

  public Either get() {
    return wrapped;
  }

  public boolean isGranted() {
    return wrapped.isRight();
  }

  /** Throws an exception if _not_ granted. */
  public A getGranted() {
    return wrapped.right().value();
  }

  public boolean isRejected() {
    return wrapped.isLeft();
  }

  public UnauthorizedException getRejected() {
    return wrapped.left().value();
  }

  public Opt getGrantedOpt() {
    return wrapped.right().toOption().toOpt();
  }

  public static  Fn, Opt> getGrantedOptFn() {
    return new Fn, Opt>() {
      @Override public Opt apply(Protected p) {
        return p.getGrantedOpt();
      }
    };
  }

  public static  Fn, Either> getFn() {
    return new Fn, Either>() {
      @Override public Either apply(Protected p) {
        return p.get();
      }
    };
  }
}