org.vishia.util

Class CalculatorExpr.SetExprBase

java.lang.Object

org.vishia.util.CalculatorExpr.SetExprBase

Enclosing class:

CalculatorExpr

public static class CalculatorExpr.SetExprBase
extends java.lang.Object

This class and its inner class CalculatorExpr.SetExprBase.SetExpr is a helper class which contains a CalculatorExpr as composite. That CalculatorExpr will be filled with the operations which are assembled with this helper. Last the CalculatorExpr.SetExprBase.SetExpr.expr() should be invoked to get the expression. After them this instance can be garbaged. It provides a set interface to the CalculatorExpr to store set parse results for the expression, especially able to use for the ZBNF parser using ZbnfJavaOutput.

• The methods of this class have to be called in the request order for operation. The rule first multiplication, outside addition should be regard by the user of this class. If an expression is parsed by the ZBNF parser or another parser, the parser syntax should know that rules.
• The first operation may be CalculatorExpr.SetExprBase.SetExpr.new_dataAccess() to access any data or CalculatorExpr.SetExprBase.SetExpr.set_doubleValue(double) to start with a constant value. Both methods stores a set operation with the given value and returns this or a proper instance for further operations.
• Especially CalculatorExpr.SetExprBase.SetExpr.newDataAccessSet() returns an instance for the DataAccess data. With that filled instance CalculatorExpr.SetExprBase.SetExpr.add_dataAccess(org.vishia.util.DataAccess.DataAccessSet) should be called then.
• Further operations can be for example CalculatorExpr.SetExprBase.SetExpr.new_multOperation(), then SetExpr.set_xyzValue(val) and after them SetExpr#add_multOperation(...). Any new_xyz operation stores the old one operation and sets a new empty operation as the current one. The following data are set to this operation. The following add_mult...() sets the operator and adds the operation.
• A CalculatorExpr.SetExprBase.SetExpr.new_parenthesisExpr() stores and clears the actOperation. Thus such as CalculatorExpr.SetExprBase.SetExpr.set_intValue(int) creates an new set operation which is stored ad start-Operation.If the execution sees a start operation and the accumulator contains any data, the accumulator will be stored in the stack and filled with the new value.
• If a operation does not contain data, it is a operation with the stack content.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	CalculatorExpr.SetExprBase.SetExpr Instances of this inner class are created with parenthesis expressions and for the whole expression.

Field Summary

Fields

Modifier and Type	Field and Description
private CalculatorExpr.Operation	actOperation
protected java.lang.Object	dbgParent
CalculatorExpr	expr

Constructor Summary

Constructors

Constructor and Description
SetExprBase(boolean d)
SetExprBase(boolean d, java.lang.Object dbgParent)
SetExprBase(CalculatorExpr.SetExprBase parent)
SetExprBase(CalculatorExpr expr)

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

actOperation

private CalculatorExpr.Operation actOperation

expr

public final CalculatorExpr expr

dbgParent

protected final java.lang.Object dbgParent

Constructor Detail

SetExprBase

public SetExprBase(boolean d,
                   java.lang.Object dbgParent)

SetExprBase

public SetExprBase(boolean d)

SetExprBase

public SetExprBase(CalculatorExpr expr)

SetExprBase

public SetExprBase(CalculatorExpr.SetExprBase parent)