Example usage for org.apache.commons.math.complex ComplexFormat ComplexFormat

Introduction

In this page you can find the example usage for org.apache.commons.math.complex ComplexFormat ComplexFormat.

Prototype

public ComplexFormat(String imaginaryCharacter) 

Source Link

Document

Create an instance with a custom imaginary character, and the default number format for both real and imaginary parts.

Usage

From source file:org.sakaiproject.tool.assessment.jsf.validator.FinQuestionValidator.java

static boolean isComplexNumber(String value) {

    boolean isComplex = true;
    Complex complex = null;//from  w ww. jav  a  2s  .c  o  m
    try {
        DecimalFormat df = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US);
        df.setGroupingUsed(false);

        // Numerical format ###.## (decimal symbol is the point)
        ComplexFormat complexFormat = new ComplexFormat(df);
        complex = complexFormat.parse(value);

        // This is because there is a bug parsing complex number. 9i is parsed as 9
        if (complex.getImaginary() == 0 && value.contains("i"))
            isComplex = false;
    } catch (Exception e) {
        isComplex = false;
    }

    return isComplex;
}

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From source file:org.sakaiproject.tool.assessment.services.GradingService.java

/**
 * Validate a students numeric answer /* w ww .j  av a 2 s.co  m*/
 * @param The answer to validate
 * @return a Map containing either Real or Complex answer keyed by {@link #ANSWER_TYPE_REAL} or {@link #ANSWER_TYPE_COMPLEX} 
 */
public Map validate(String value) {
    HashMap map = new HashMap();
    if (value == null || value.trim().equals("")) {
        return map;
    }
    String trimmedValue = value.trim();
    boolean isComplex = true;
    boolean isRealNumber = true;

    BigDecimal studentAnswerReal = null;
    try {
        studentAnswerReal = new BigDecimal(trimmedValue);
    } catch (Exception e) {
        isRealNumber = false;
    }

    // Test for complex number only if it is not a BigDecimal
    Complex studentAnswerComplex = null;
    if (!isRealNumber) {
        try {
            DecimalFormat df = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US);
            df.setGroupingUsed(false);

            // Numerical format ###.## (decimal symbol is the point)
            ComplexFormat complexFormat = new ComplexFormat(df);
            studentAnswerComplex = complexFormat.parse(trimmedValue);

            // This is because there is a bug parsing complex number. 9i is parsed as 9
            if (studentAnswerComplex.getImaginary() == 0 && trimmedValue.contains("i")) {
                isComplex = false;
            }
        } catch (Exception e) {
            isComplex = false;
        }
    }

    Boolean isValid = isComplex || isRealNumber;
    if (!isValid) {
        throw new FinFormatException("Not a valid FIN Input. studentanswer=" + trimmedValue);
    }

    if (isRealNumber) {
        map.put(ANSWER_TYPE_REAL, studentAnswerReal);
    } else if (isComplex) {
        map.put(ANSWER_TYPE_COMPLEX, studentAnswerComplex);
    }

    return map;
}

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