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.types.spi;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.ProjectComponent;
  
  /**
   * ANT Jar-Task SPI extension
   * This class corresponds to the nested element
   * &lt;provider type="type"&gt; in the &lt;service type=""&gt;
   * nested element of the jar task.
   * @see <a href="https://issues.apache.org/bugzilla/show_bug.cgi?id=31520">
   * https://issues.apache.org/bugzilla/show_bug.cgi?id=31520</a>
   */
  public class Provider extends ProjectComponent {
      private String type;
  
      /**
       * @return the class name for
       */
      public String getClassName() {
          return type;
      }
  
      /**
       * Set the provider classname.
       * @param type the value to set.
       */
      public void setClassName(String type) {
          this.type = type;
      }
  
      /**
       * Check if the component has been configured correctly.
       */
      public void check() {
          if (type == null) {
              throw new BuildException(
                  "classname attribute must be set for provider element",
                  getLocation());
          }
          if (type.isEmpty()) {
              throw new BuildException(
                  "Invalid empty classname", getLocation());
          }
      }
  }
  