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 java.io.IOException;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.ProjectComponent;
  
  /**
   * Condition to wait for a TCP/IP socket to have a listener. Its attributes are:
   *   server - the name of the server.
   *   port - the port number of the socket.
   *
   * @since Ant 1.5
   */
  public class Socket extends ProjectComponent implements Condition {
      private String server = null;
      private int port = 0;
  
      /**
       * Set the server attribute
       *
       * @param server the server name
       */
      public void setServer(String server) {
          this.server = server;
      }
  
      /**
       * Set the port attribute
       *
       * @param port the port number of the socket
       */
      public void setPort(int port) {
          this.port = port;
      }
  
      /**
       * @return true if a socket can be created
       * @exception BuildException if the attributes are not set
       */
      @Override
      public boolean eval() throws BuildException {
          if (server == null) {
              throw new BuildException("No server specified in socket condition");
          }
          if (port == 0) {
              throw new BuildException("No port specified in socket condition");
          }
          log("Checking for listener at " + server + ":" + port,
              Project.MSG_VERBOSE);
          try (java.net.Socket s = new java.net.Socket(server, port)) {
              return true;
          } catch (IOException e) {
              return false;
          }
      }
  
  }
  