Package com.Lomikel.DB

Class Evaluator

java.lang.Object

com.Lomikel.DB.Evaluator

Direct Known Subclasses:

GremlinEvaluator, HBaseEvaluator

public class Evaluator
extends java.lang.Object

Evaluator evaluates formulas.

Author:

J.Hrivnac

Field Summary

Fields

Modifier and Type	Field	Description
private Interpreter	_interpreter
private Schema	_schema
private java.util.Set<java.lang.String>	_variables
private static org.apache.logging.log4j.Logger	log	Logging .

Constructor Summary

Constructors

Constructor	Description
Evaluator(Schema schema)	Create.

Method Summary

Modifier and Type	Method	Description
java.lang.String	eval(java.util.Map<java.lang.String,java.lang.String> values, java.lang.String formula, java.lang.String type)	Evaluate formula with supplied variables and values.
boolean	evalBoolean(java.util.Map<java.lang.String,java.lang.String> values, java.lang.String formula)	Evaluate boolean formula with supplied variables and values.
double	evalDouble(java.util.Map<java.lang.String,java.lang.String> values, java.lang.String formula)	Evaluate double formula with supplied variables and values.
void	forceVariables(java.lang.String variables)	Add variables to the list of used variables.
boolean	hasVariable(java.lang.String var)	Shows whether a variable exists.
static double	qdistance0(double v1, double v2, double v3, double v4)
void	setEvaluatorFunctions(java.lang.String javaEF, java.lang.String bshEF)	Set Java and BeanShell Evaluator Functions.
void	setVariable(java.lang.String name)	Declare variable.
void	setVariable(java.lang.String name, double value)	TBD
void	setVariable(java.lang.String name, double[] values)	TBD
void	setVariable(java.lang.String name, java.lang.String value)	Set variable.
void	setVariable(java.lang.String name, java.lang.String[] values)	Set array variable.
void	setVariables(java.lang.String formula)	Add variables to the list of used variables.
java.lang.String[]	variables()	Give the array of used variables.
protected java.lang.String	varName(java.lang.String fullName)	Give variable name from the database name.

Methods inherited from class java.lang.Object

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

Field Detail

_schema

private Schema _schema

_variables

private java.util.Set<java.lang.String> _variables

_interpreter

private Interpreter _interpreter

log

private static org.apache.logging.log4j.Logger log

Logging .

Constructor Detail

Evaluator

public Evaluator(Schema schema)
          throws LomikelException

Create.

Parameters:

schema - The Schema to use to interpret types.

Throws:

CommonpException - If can't be initiated.

LomikelException

Method Detail

setEvaluatorFunctions

public void setEvaluatorFunctions(java.lang.String javaEF,
                                  java.lang.String bshEF)
                           throws LomikelException

Set Java and BeanShell Evaluator Functions.

Parameters:

javaEF - The Java Evaluatior Functions class name. May be null.

bshEF - The BeanShell Evaluatior Functions script name. May be null.

Throws:

CommonpException - If can't be set.

LomikelException

evalBoolean

public boolean evalBoolean(java.util.Map<java.lang.String,java.lang.String> values,
                           java.lang.String formula)
                    throws LomikelException

Evaluate boolean formula with supplied variables and values.

Parameters:

values - The names and values of variables.

formula - The formula to be evaluated. It should use supplied variables, which will be filled with supplied values.

Throws:

LomikelException - If formula cannot be evaluated with supplied variables.

qdistance0

public static double qdistance0(double v1,
                                double v2,
                                double v3,
                                double v4)

evalDouble

public double evalDouble(java.util.Map<java.lang.String,java.lang.String> values,
                         java.lang.String formula)
                  throws LomikelException

Evaluate double formula with supplied variables and values.

Parameters:

values - The names and values of variables.

formula - The formula to be evaluated. It should use supplied variables, which will be filled with supplied values.

Throws:

LomikelException - If formula cannot be evaluated with supplied variables.

eval

public java.lang.String eval(java.util.Map<java.lang.String,java.lang.String> values,
                             java.lang.String formula,
                             java.lang.String type)
                      throws LomikelException

Evaluate formula with supplied variables and values.

Parameters:

values - The names and values of variables.

formula - The formula to be evaluated. It should use supplied variables, which will be filled with supplied values.

type - The formula result type.

Throws:

LomikelException - If formula cannot be evaluated with supplied variables.

setVariable

public void setVariable(java.lang.String name)

Declare variable. Set to 0.

Parameters:

name - The name of variables.

setVariable

public void setVariable(java.lang.String name,
                        java.lang.String value)

Set variable.

Parameters:

name - The name of variables.

value - The value of variables. Undefined types are considered double, unknown types are taken as string.

setVariable

public void setVariable(java.lang.String name,
                        double value)

TBD

setVariable

public void setVariable(java.lang.String name,
                        java.lang.String[] values)

Set array variable.

Parameters:

name - The name of variables.

values - The values of variables. Undefined types are considered double, unknown types are taken as string.

setVariable

public void setVariable(java.lang.String name,
                        double[] values)

TBD

variables

public java.lang.String[] variables()

Give the array of used variables.

Returns:

The array of used variables.

hasVariable

public boolean hasVariable(java.lang.String var)

Shows whether a variable exists.

Parameters:

var - The name of a variable.

Returns:

Whether that variable exists.

setVariables

public void setVariables(java.lang.String formula)

Add variables to the list of used variables. Only add variables available in Schema.

Parameters:

formula - The formula to be used for list of used variables.

forceVariables

public void forceVariables(java.lang.String variables)

Add variables to the list of used variables. Add variables even if they are not available in Schema.

Parameters:

formula - The formula to be used for list of used variables.

varName

protected java.lang.String varName(java.lang.String fullName)

Give variable name from the database name.

Parameters:

fullName - The fill name of the database column.

Returns:

The schema variable name.