org.matheclipse.core.eval

Class EvalUtilities

java.lang.Object

org.matheclipse.core.eval.MathMLUtilities

org.matheclipse.core.eval.EvalUtilities

Direct Known Subclasses:

SymjaInterpreter, TimeConstrainedEvaluator

public class EvalUtilities
extends MathMLUtilities

Utility to evaluate math expressions.

Constructor Summary

Constructors

Constructor and Description
EvalUtilities() Constructor for an object which evaluates an expression.
EvalUtilities(boolean mathMTagPrefix, boolean relaxedSyntax) Constructor for an object which evaluates an expression.
EvalUtilities(EvalEngine evalEngine, boolean mathMTagPrefix, boolean relaxedSyntax) Constructor for an object which evaluates an expression.

Method Summary

Modifier and Type	Method and Description
static IExpr	eval(java.lang.String inputExpression, EvalEngine evalEngine) Evaluate the inputExpression and return the resulting expression.
IAST	evalTrace(IExpr parsedExpression, Predicate<IExpr> matcher, IAST list) Evaluate the parsedExpression and return the Trace[parsedExpression] (i.e.
IAST	evalTrace(java.lang.String inputExpression, Predicate<IExpr> matcher, IAST list) Evaluate the inputExpression and return the Trace[inputExpression] (i.e.
IExpr	evaluate(IExpr parsedExpression) Evaluate the parsedExpression and return the resulting expression.
IExpr	evaluate(java.lang.String inputExpression) Evaluate the inputExpression and return the resulting expression.
java.lang.String	toJavaForm(java.lang.String inputExpression) Converts the inputExpression string into a MathML expression and writes the result to the given Writer
void	toMathML(java.lang.String inputExpression, java.io.Writer out) Converts the inputExpression string into a MathML expression and writes the result to the given Writer

Methods inherited from class org.matheclipse.core.eval.MathMLUtilities

startRequest, stopRequest, toJava, toMathML

Methods inherited from class java.lang.Object

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

Constructor Detail

EvalUtilities

public EvalUtilities()

Constructor for an object which evaluates an expression. By default the internal EvalEngine didn't create a history list for the Out[] function.

Parameters:

evalEngine -

mathMTagPrefix - if set to true use "m:" as tag prefix for the MathML output.

relaxedSyntax -

EvalUtilities

public EvalUtilities(boolean mathMTagPrefix,
                     boolean relaxedSyntax)

Constructor for an object which evaluates an expression.

Parameters:

mathMTagPrefix - if set to true use "m:" as tag prefix for the MathML output.

relaxedSyntax - if set to true use "(...)" instead of "[...]" for function arguments (i.e. sin(...) instead of sin[...]).

EvalUtilities

public EvalUtilities(EvalEngine evalEngine,
                     boolean mathMTagPrefix,
                     boolean relaxedSyntax)

Constructor for an object which evaluates an expression.

Parameters:

evalEngine -

mathMTagPrefix - if set to true use "m:" as tag prefix for the MathML output.

relaxedSyntax - if set to true use "(...)" instead of "[...]" for function arguments (i.e. sin(...) instead of sin[...]).

Method Detail

evaluate

public IExpr evaluate(java.lang.String inputExpression)
               throws MathException

Evaluate the inputExpression and return the resulting expression.

Parameters:

inputExpression - the expression which should be evaluated.

Returns:

null, if the inputExpression is null

Throws:

MathException

eval

public static IExpr eval(java.lang.String inputExpression,
                         EvalEngine evalEngine)
                  throws MathException

Evaluate the inputExpression and return the resulting expression.
The parser first tries (independently from the settings in the evalEngine) to parse the expression in the "relaxed mode" (i.e. "common math expression syntax" with parentheses for function arguments) and if that results in a SyntaxError exception it tries to parse in the "stronger mode" (i.e. with square brackets for function arguments).
Note that after the second parser step this method may also throw a SyntaxError exception.

Parameters:

inputExpression - the expression which should be evaluated.

evalEngine - the evaluation engine which should be used

Returns:

null, if the inputExpression is null

Throws:

MathException

evaluate

public IExpr evaluate(IExpr parsedExpression)
               throws MathException

Evaluate the parsedExpression and return the resulting expression.

Parameters:

parsedExpression - the expression which should be evaluated.

Returns:

Throws:

MathException

toJavaForm

public java.lang.String toJavaForm(java.lang.String inputExpression)
                            throws MathException

Converts the inputExpression string into a MathML expression and writes the result to the given Writer

Parameters:

inputExpression -

out -

Throws:

MathException

evalTrace

public IAST evalTrace(java.lang.String inputExpression,
                      Predicate<IExpr> matcher,
                      IAST list)
               throws MathException

Evaluate the inputExpression and return the Trace[inputExpression] (i.e. all (sub-)expressions needed to calculate the result).

Parameters:

inputExpression - the expression which should be evaluated.

matcher - a filter which determines the expressions which should be traced, If the matcher is set to null, all expressions are traced.

list - an IAST object which will be cloned for containing the traced expressions. Typically a F.List() will be used.

Returns:

Throws:

MathException

evalTrace

public IAST evalTrace(IExpr parsedExpression,
                      Predicate<IExpr> matcher,
                      IAST list)
               throws java.lang.RuntimeException

Evaluate the parsedExpression and return the Trace[parsedExpression] (i.e. all (sub-)expressions needed to calculate the result).

Parameters:

parsedExpression - the expression which should be evaluated.

matcher - a filter which determines the expressions which should be traced, If the matcher is set to null, all expressions are traced.

list - an IAST object which will be cloned for containing the traced expressions. Typically a F.List() will be used.

Returns:

Throws:

java.lang.RuntimeException

toMathML

public void toMathML(java.lang.String inputExpression,
                     java.io.Writer out)

Converts the inputExpression string into a MathML expression and writes the result to the given Writer

Overrides:

toMathML in class MathMLUtilities