org.vishia.util

Class CalculatorExpr.Operand

java.lang.Object

org.vishia.util.CalculatorExpr.Operand

Direct Known Subclasses:

OutTextPreparer.Argument, OutTextPreparer.Cmd

Enclosing class:

CalculatorExpr

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

Operand for a part of the expression, refer from CalculatorExpr.Operation.

Field Summary

Fields

Modifier and Type	Field and Description
DataAccess	dataAccess Set if the value uses reflection.
java.lang.Object	dataConst Set for constant data.
CalculatorExpr	expr If not null the operand is calculated with an expression itself.
int	ixValue Index of the value contained in a given array on execution, -1 if not used.
java.lang.String	textOrVar The String literal or the given sDatapath.

Constructor Summary

Constructors

Constructor and Description
Operand(CalculatorExpr.Value value)
Operand(CalculatorExpr expr)
Operand(int ixValue, DataAccess dataAccess, java.lang.Object dataConst, java.lang.String textOrVar) Constructs
Operand(java.lang.String text) A ValueAccess without value, only a constant text literal, especially for Text Cmd.
Operand(java.lang.String sDatapath, java.util.Map<java.lang.String,DataAccess.IntegerIx> variables, java.lang.Class<?> reflData) Deprecated. it should be possible to use Operand#Operand(StringPartScan, Map, Class) in all cases.
Operand(StringPartScan sDatapath, java.util.Map<java.lang.String,DataAccess.IntegerIx> variables, java.lang.Class<?> reflData, boolean bSpecialSyntax) Either a value access with given data (base of Argument, or a Command with value access, base of Cmd

Method Summary

Modifier and Type	Method and Description
java.lang.Object	calc(java.util.Map<java.lang.String,DataAccess.IntegerIx> nameVariables, java.lang.Object[] varValues) Accesses and returns the value of this operand.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ixValue

public int ixValue

Index of the value contained in a given array on execution, -1 if not used.

dataAccess

public final DataAccess dataAccess

Set if the value uses reflection.

dataConst

public final java.lang.Object dataConst

Set for constant data.

textOrVar

public final java.lang.String textOrVar

The String literal or the given sDatapath. Last one is for debug/comment, not for using.

expr

public final CalculatorExpr expr

If not null the operand is calculated with an expression itself.

Constructor Detail

Operand

public Operand(java.lang.String text)

A ValueAccess without value, only a constant text literal, especially for Text Cmd.

Parameters:

text -

Operand

public Operand(CalculatorExpr expr)

Operand

public Operand(int ixValue,
               DataAccess dataAccess,
               java.lang.Object dataConst,
               java.lang.String textOrVar)

Constructs

Parameters:

ixValue - -1 if no variable is used

dataAccess - maybe null, the access inside a given variable if ixValue >=0

dataConst -

textOrVar - Name of the variabe if ixValue >=0, constant text if ixValue <0

Operand

public Operand(CalculatorExpr.Value value)

Operand

public Operand(java.lang.String sDatapath,
               java.util.Map<java.lang.String,DataAccess.IntegerIx> variables,
               java.lang.Class<?> reflData)
        throws java.lang.Exception

Deprecated. it should be possible to use Operand#Operand(StringPartScan, Map, Class) in all cases.

Either a value access with given data (base of Argument, or a Command with value access, base of Cmd

Parameters:

sDatapath - textual given value. It is either a literal, a simple variable ...TODO docu

variables - Container with some variable names associated to indices in a value array.

reflData - type wich can contain a static member with the required name in sDatapath if the name is not found in variables

Throws:

java.lang.Exception

Operand

public Operand(StringPartScan sDatapath,
               java.util.Map<java.lang.String,DataAccess.IntegerIx> variables,
               java.lang.Class<?> reflData,
               boolean bSpecialSyntax)
        throws java.text.ParseException

Either a value access with given data (base of Argument, or a Command with value access, base of Cmd

Parameters:

sDatapath - textual given value. It is either a literal, a simple variable ...TODO docu

variables - Container with some variable names associated to indices in a value array. see DataAccess.DataAccess(StringPartScan, Map, Class, char)

reflData - type wich can contain a static member with the required name in sDatapath if the name is not found in variables

Throws:

java.lang.Exception

java.text.ParseException

Method Detail

calc

public java.lang.Object calc(java.util.Map<java.lang.String,DataAccess.IntegerIx> nameVariables,
                             java.lang.Object[] varValues)
                      throws java.lang.Exception

Accesses and returns the value of this operand. The start object is given in varValues with ixValue. If ixValue is <0 then either the given dataConst or the textOrVar is returned.

Parameters:

nameVariables - see DataAccess.access(List, Object, boolean, boolean, Map, Object[], boolean, org.vishia.util.DataAccess.Dst) necessary on indirect access to variable via String, construct such as <&&(path)>

varValues - Array of possible values proper to the given ixValue

Returns:

if dataAccess is given, it accesses with the given start Object

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object