net.sf.farrago.fennel.calc
Class RexToCalcTranslator.ExpressionScope

java.lang.Object
  net.sf.farrago.fennel.calc.RexToCalcTranslator.ExpressionScope

Enclosing class:

RexToCalcTranslator

public class RexToCalcTranslator.ExpressionScope
extends Object

Supports scoping rules for calculator programs. Conditional code, not visible outside a block of code, belongs in its own scope.

Field Summary

private RexToCalcTranslator.ExpressionScope	parent
private Map<String,CalcReg>	results

Constructor Summary

	RexToCalcTranslator.ExpressionScope() Constructs a new scope
private	RexToCalcTranslator.ExpressionScope(RexToCalcTranslator.ExpressionScope parent)

Method Summary

void	clear()
CalcReg	get(String key)
RexToCalcTranslator.ExpressionScope	newScope() Returns a new scope extending the current scope.
RexToCalcTranslator.ExpressionScope	popScope() Returns the parent scope
void	set(String key, CalcReg result)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

parent

private final RexToCalcTranslator.ExpressionScope parent

results

private final Map<String,CalcReg> results

Constructor Detail

RexToCalcTranslator.ExpressionScope

private RexToCalcTranslator.ExpressionScope(RexToCalcTranslator.ExpressionScope parent)

RexToCalcTranslator.ExpressionScope

public RexToCalcTranslator.ExpressionScope()

Constructs a new scope

Method Detail

newScope

public RexToCalcTranslator.ExpressionScope newScope()

Returns a new scope extending the current scope. Must always be matched with popScope or mysterious errors will arise.

popScope

public RexToCalcTranslator.ExpressionScope popScope()

Returns the parent scope

get

public CalcReg get(String key)

set

public void set(String key,
                CalcReg result)

clear

public void clear()