Example usage for org.apache.commons.math3.exception ZeroException ZeroException

Introduction

In this page you can find the example usage for org.apache.commons.math3.exception ZeroException ZeroException.

Prototype

public ZeroException() 

Source Link

Document

Construct the exception.

Usage

From source file:com.wwidesigner.gui.StudyModel.java

/**
 * Optimize the currently-selected objective function
 * /*from  ww  w  .  ja v  a 2  s.  c  o m*/
 * @return XML string defining the optimized instrument, if optimization
 *         succeeds, or {@code null} if optimization fails.
 */
public String optimizeInstrument() throws Exception {
    if (!validHoleCount()) {
        return null;
    }
    objective = getObjectiveFunction(BaseObjectiveFunction.OPTIMIZATION_INTENT);

    // Check to see whether there are 0 variables: an infinite loop
    // situation.
    if (objective.getNrDimensions() < 1) {
        throw new ZeroException();
    }

    BaseObjectiveFunction.OptimizerType optimizerType = objective.getOptimizerType();
    if (preferredOptimizerType != null
            && !optimizerType.equals(BaseObjectiveFunction.OptimizerType.BrentOptimizer)) {
        optimizerType = preferredOptimizerType;
    }

    if (!objective.isOptimizerMatch(optimizerType)) {
        throw new OptimizerMismatchException("Cannot run multi-start optimization with " + optimizerType);
    }

    initialNorm = 1.0;
    finalNorm = 1.0;
    if (ObjectiveFunctionOptimizer.optimizeObjectiveFunction(objective, optimizerType)) {
        Instrument instrument = objective.getInstrument();
        // Convert back to the input unit-of-measure values
        instrument.convertToLengthType();
        String xmlString = marshal(instrument);
        initialNorm = ObjectiveFunctionOptimizer.getInitialNorm();
        finalNorm = ObjectiveFunctionOptimizer.getFinalNorm();
        objective = null;
        return xmlString;
    }
    objective = null;
    return null;
}

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