org.vishia.util

Class CalculatorExpr.Data

java.lang.Object

org.vishia.util.CalculatorExpr.Data

Enclosing class:

CalculatorExpr

Deprecated.

@Deprecated
public static class CalculatorExpr.Data
extends java.lang.Object

It is the data instance for the caluclation. Only the data instance have current data. One can use the CalculatorExpr itself in multithreading/multicore, but any thread should have its own data. The data instance can be reused in the same thread for the next operation. Invoke clean() before reusing.

Field Summary

Fields

Modifier and Type	Field and Description
protected CalculatorExpr.Value	accu Deprecated. The top of stack is the accumulator for the current level of adequate operations, for example all multiplications without stack changing.
protected java.util.Stack<CalculatorExpr.Value>	stack Deprecated. The stack of values used temporary.

Constructor Summary

Constructors

Constructor and Description
Data() Deprecated. Default empty constructor should be called one time before a specific or all calculations are executed.

Method Summary

Modifier and Type	Method and Description
void	clean() Deprecated. Cleans, creates a new accu instance for its cummulativ calculation.

Methods inherited from class java.lang.Object

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

Field Detail

accu

protected CalculatorExpr.Value accu

Deprecated.

The top of stack is the accumulator for the current level of adequate operations, for example all multiplications without stack changing. It is the left operand of an operation. The right operand is given in the operation itself. It an operation acts with the last 2 stack levels, the value of the top of stack (the accu) is set locally in the operation and the second value of the stack operands is set to the accu.

stack

protected final java.util.Stack<CalculatorExpr.Value> stack

Deprecated.

The stack of values used temporary. It is only in used while any calculate routine runs. The top of all values is not stored in the stack but in the accu. It means that often the stack is not used.

Constructor Detail

Data

public Data()

Deprecated.

Default empty constructor should be called one time before a specific or all calculations are executed. Call clean() before it is reused for the next calculation.

Method Detail

clean

public void clean()

Deprecated.

Cleans, creates a new accu instance for its cummulativ calculation. It means if the accu instance from a calculation before was stored in any other context (are reference), then is is possible, without problems. It also call Vector.clear() to guarantee an empty stack, which may be hang from an exception before.