org.jscience.computing.ai.planning
Class LogicalExpressionNil

java.lang.Object
  extended by org.jscience.computing.ai.planning.CompileTimeObject
      extended by org.jscience.computing.ai.planning.LogicalExpression
          extended by org.jscience.computing.ai.planning.LogicalExpressionNil

public class LogicalExpressionNil
extends LogicalExpression

Each empty logical expression at compile time is represented as an instance of this class.


Constructor Summary
LogicalExpressionNil()
           
 
Method Summary
 java.lang.String getInitCode()
          This class does not need any initialization code, therefore, this function simply returns an empty String.
protected  void propagateVarCount(int varCount)
          This class does not need to propagate the variable count, therefore, this function does nothing.
 java.lang.String toCode()
          This function produces the Java code to create a PreconditionNil object that represents this empty logical expression at run time.
 
Methods inherited from class org.jscience.computing.ai.planning.LogicalExpression
getClassCnt, getVarCount, setVarCount
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

LogicalExpressionNil

public LogicalExpressionNil()
Method Detail

getInitCode

public java.lang.String getInitCode()
This class does not need any initialization code, therefore, this function simply returns an empty String.

Specified by:
getInitCode in class LogicalExpression
Returns:
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propagateVarCount

protected void propagateVarCount(int varCount)
This class does not need to propagate the variable count, therefore, this function does nothing.

Specified by:
propagateVarCount in class LogicalExpression
Parameters:
varCount - DOCUMENT ME!

toCode

public java.lang.String toCode()
This function produces the Java code to create a PreconditionNil object that represents this empty logical expression at run time.

Specified by:
toCode in class CompileTimeObject
Returns:
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