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.ProjectComponent;
  
  /**
   * Condition that tests whether a given string evals to true
   *
   * @since Ant 1.5
   */
  public class IsTrue extends ProjectComponent implements Condition {
      /**
       * what we eval
       */
      private Boolean value = null;
  
      /**
       * set the value to be tested; let ant eval it to true/false
       * @param value the value to test
       */
      public void setValue(boolean value) {
          this.value = value ? Boolean.TRUE : Boolean.FALSE;
      }
  
      /**
       * @return the value
       * @throws BuildException if someone forgot to spec a value
       */
      @Override
      public boolean eval() throws BuildException {
          if (value == null) {
              throw new BuildException("Nothing to test for truth");
          }
          return value;
      }
  
  }
  