com.anrisoftware.globalpom.format.measurement.ScientificValueFormatWorker Maven / Gradle / Ivy

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/*
 * Copyright 2016 Erwin Müller 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.anrisoftware.globalpom.format.measurement;

import static com.anrisoftware.globalpom.math.MathUtils.isFraction;
import static org.apache.commons.math3.util.FastMath.abs;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;

import org.apache.commons.math3.util.FastMath;

class ScientificValueFormatWorker extends AbstractValueFormatWorker {

    public ScientificValueFormatWorker(DecimalFormatSymbols symbols,
            Integer significant, Integer decimal) {
        super(symbols, significant, decimal);
    }

    @Override
    public String formatNumber(double value, int order, int sig, int dec) {
        StringBuilder pattern = new StringBuilder(DIGIT_STR);
        dec = abs(dec);
        double avalue = abs(value);
        double rvalue = ValueFormat.roundValue(value, sig, dec);
        if (dec != 0 && avalue < 1 || avalue > 9) {
            pattern.append(DECIMAL_CHAR);
            int s = avalue < 0 ? 0 : 1;
            for (int i = s; i < sig; i++) {
                pattern.append(DIGIT_CHAR);
            }
            pattern.append("E0");
        } else if (isFraction(avalue)) {
            pattern.append(DECIMAL_CHAR);
            for (int i = 1; i < sig; i++) {
                pattern.append(DIGIT_ZERO_CHAR);
            }
        }
        DecimalFormat format = new DecimalFormat(pattern.toString(), symbols);
        return format.format(rvalue);
    }

    @Override
    public String formatUncertainty(double unc, int order, int sig, int dec) {
        if (unc == 0) {
            return DIGIT_STR;
        }
        double aunc = abs(unc);
        int oorder = order - 1;
        double vunc = unc / FastMath.pow(10, oorder);
        StringBuilder pattern = new StringBuilder(DIGIT_STR);
        if (dec != 0) {
            pattern.append(DECIMAL_CHAR);
            int s = aunc < 0 ? 0 : 1;
            for (int i = s; i < sig; i++) {
                pattern.append(DIGIT_CHAR);
            }
        }
        DecimalFormat format = new DecimalFormat(pattern.toString(), symbols);
        String str = format.format(vunc);
        if (oorder != 0) {
            str = String.format("%sE%d", str, oorder);
        }
        return str;
    }

}