content: package com.alibaba.qlexpress4.runtime.instruction;
  
  import com.alibaba.qlexpress4.QLOptions;
  import com.alibaba.qlexpress4.exception.ErrorReporter;
  import com.alibaba.qlexpress4.runtime.QContext;
  import com.alibaba.qlexpress4.runtime.QResult;
  import com.alibaba.qlexpress4.runtime.data.DataValue;
  import com.alibaba.qlexpress4.utils.PrintlnUtils;
  
  import java.util.function.Consumer;
  
  /**
   * Operation: jump to a position
   * Input: 0
   * Output: 0
   *
   * Author: DQinYuan
   */
  public class JumpInstruction extends QLInstruction {
      
      public static final JumpInstruction INSTANCE = new JumpInstruction(null, -1);
      
      private int position;
      
      public JumpInstruction(ErrorReporter errorReporter, int position) {
          super(errorReporter);
          this.position = position;
      }
      
      @Override
      public QResult execute(QContext qContext, QLOptions qlOptions) {
          return new QResult(new DataValue(position), QResult.ResultType.JUMP);
      }
      
      @Override
      public int stackInput() {
          return 0;
      }
      
      @Override
      public int stackOutput() {
          return 0;
      }
      
      public void setPosition(int position) {
          this.position = position;
      }
      
      @Override
      public void println(int index, int depth, Consumer<String> debug) {
          PrintlnUtils.printlnByCurDepth(depth, index + ": Jump " + position, debug);
      }
  }
  