content: /*
   *  Licensed 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
   *
   *      http://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.
   *
   *  See the NOTICE file distributed with this work for additional
   *  information regarding copyright ownership.
   */
  
  package org.seaborne.delta.cmds;
  
  import java.io.IOException;
  import java.io.InputStream ;
  
  import org.apache.jena.atlas.io.IO;
  import org.apache.jena.atlas.logging.LogCtl ;
  import org.apache.jena.cmd.CmdGeneral;
  import org.apache.jena.sys.JenaSystem;
  
  /** Abstract base class to work on patch files given on the command line */
  public abstract class CmdPatch extends CmdGeneral
  {
      static {
          LogCtl.setLogging();
          JenaSystem.init();
      }
  
      protected CmdPatch(String[] argv) {
          super(argv) ;
      }
  
      @Override
      protected String getSummary() {
          return getCommandName()+" FILE..." ;
      }
  
      @Override
      protected void processModulesAndArgs() {
          super.processModulesAndArgs();
      }
  
      @Override
      protected void exec() {
          execStart();
          try {
              // Patches
              if ( getPositional().isEmpty() )
                  execOne("Stdin", System.in);
              else {
                  getPositional().forEach(fn->{
                      try ( InputStream in = IO.openFile(fn) ) {
                          execOne(fn, in);
                      } catch (IOException ex) { IO.exception(ex); return; }
                  });
              }
          } finally { execFinish(); }
      }
  
      protected void execStart() {}
      protected abstract void execOne(String source, InputStream input);
      protected void execFinish() {}
  }
  