content: /*
   *  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
   *
   *      https://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.tools.ant.taskdefs.condition;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.util.StreamUtils;
  
  /**
   * The <code>Xor</code> condition type to exclusive or operations.
   * This does not shortcut stuff.
   * @since Ant 1.7
   */
  public class Xor extends ConditionBase implements Condition {
  
      /**
       * Evaluate the contained conditions.
       * @return the result of xoring the conditions together.
       * @throws BuildException
       *          if an error occurs.
       */
      @Override
      public boolean eval() throws BuildException {
          // initial state is false
          return StreamUtils.enumerationAsStream(getConditions()).map(Condition::eval)
                  .reduce((a, b) -> a ^ b).orElse(Boolean.FALSE);
      }
  
  }
  