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  1. import java.util.*;
  2.  
  3. class CodeTable extends Hashtable
  4. {
  5.     private int totalToDo = 0;
  6.     private int totalInWait = 0;
  7.  
  8.     public int getTotalInWait()
  9.     {
  10. 	return totalInWait;
  11.     }
  12.  
  13.     public int getTotalToDo()
  14.     {
  15. 	return totalToDo;
  16.     }
  17.  
  18.     /*
  19.      * Override put() method of Hashtable
  20.      */
  21.     public synchronized Object put(Object lineNumber, Object value)
  22.     {
  23. 	Command command = (Command)value;
  24. 	Object old = super.put(lineNumber, command);
  25. 	if (old == null)
  26. 	    {
  27. 		totalToDo += command.numToDo;
  28. 		return null;
  29. 	    }
  30. 	else
  31. 	    {
  32. 		Command oldCommand = (Command)old;
  33. 		totalToDo += command.numToDo - oldCommand.numToDo;
  34. 		return oldCommand;
  35. 	    }
  36.     }
  37.  
  38.     public boolean getN(int lineNum)
  39.     {
  40. 	Integer lineNumber = new Integer(lineNum);
  41. 	return getN(lineNumber);
  42.     }
  43.  
  44.     public boolean getN(Integer lineNumber)
  45.     {
  46. 	Command command = (Command)this.get(lineNumber);
  47. 	if (command == null)
  48. 	    return false;
  49. 	return command.numToDo > 0;
  50.     }
  51.  
  52.     public int getNumToDo(int lineNum)
  53.     {
  54. 	Integer lineNumber = new Integer(lineNum);
  55. 	return getNumToDo(lineNumber);
  56.     }
  57.  
  58.     public int getNumToDo(Integer lineNumber)
  59.     {
  60. 	Command command = (Command)this.get(lineNumber);
  61. 	if (command == null)
  62. 	    return 0;
  63. 	return command.numToDo;
  64.     }
  65.  
  66.     public int changeNumToDo(int lineNum, int change)
  67.     {
  68. 	Integer lineNumber = new Integer(lineNum);
  69. 	return changeNumToDo(lineNumber, change);
  70.     }
  71.  
  72.     public int changeNumToDo(Integer lineNumber, int change)
  73.     {
  74. 	if (lineNumber.intValue() < 0)
  75. 	    {
  76. 		lineNumber = new Integer(-lineNumber.intValue());
  77. 		change = -change;
  78. 	    }
  79. 	Command command = (Command)this.get(lineNumber);
  80. 	if (command == null) // need to do something here to implement adding extra line numbers
  81. 	    return 0;
  82. 	command.numToDo += change;
  83. 	totalToDo += change;
  84. 	if (command.numToDo < 0)
  85. 	    {
  86. 		totalToDo -= command.numToDo;
  87. 		command.numToDo = 0;
  88. 	    }
  89. 	this.put(lineNumber, command);
  90. 	return command.numToDo;
  91.     }
  92.  
  93.     public void doCommand(int instanceToDo) throws NoSuchElementException
  94.     {
  95. 	// get the actual command to be executed by iterating through the commands until we pass the required number
  96. 	Enumeration enumm = this.keys();
  97. 	Integer lineNumber = (Integer)enumm.nextElement();
  98. 	Command command = (Command)this.get(lineNumber);
  99. 	while (!(command.available) || (instanceToDo > command.numToDo))
  100. 	    {
  101. 		if (command.available)
  102. 		    {
  103. 			instanceToDo -= command.numToDo;
  104. 		    }
  105. 		lineNumber = (Integer)enumm.nextElement();
  106. 		command = (Command)this.get(lineNumber);
  107. 	    }
  108. 	if (WheneverCode.traceLevel >= 2)
  109. 	    System.out.println("[Attempting line " + lineNumber.toString() + "]");
  110. 	// execute the command, passing the line number so it know what its line number is
  111. 	if (!command.execute(lineNumber))
  112. 	    {
  113. 		// command was deferred. 
  114. 		// remove command from the list of things to do.
  115. 		if (WheneverCode.traceLevel >= 2)
  116. 		    System.out.println("[Will not try deferred line " + lineNumber.toString() + " again for now]");
  117. 		command.available = false;
  118. 		totalToDo -= command.numToDo;
  119. 		totalInWait += command.numToDo;
  120. 	    } 
  121. 	else 
  122. 	    {
  123. 		if (WheneverCode.traceLevel == 1)
  124. 		    System.out.println("[Succeeded line " + lineNumber.toString() + "]");
  125. 		// command was executed.
  126. 		// set all commands as available.
  127. 		enumm = this.keys();
  128. 		while (enumm.hasMoreElements())
  129. 		    {
  130. 			lineNumber = (Integer)enumm.nextElement();
  131. 			command = (Command)this.get(lineNumber);
  132. 			if (!command.available)
  133. 			    {
  134. 				command.available = true;
  135. 				if (WheneverCode.traceLevel >= 2)
  136. 				    System.out.println("[Making deferred line " + lineNumber.toString() + " available again for now]");
  137. 			    }
  138. 			totalToDo += totalInWait;
  139. 			totalInWait = 0;
  140. 		    }
  141. 	    }
  142.     }
  143. }
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https://ideone.com/pD4bo
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
secret

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