LocalizedStatFormats.java

/*
 * Licensed to the Hipparchus project under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The Hipparchus project licenses this file to You 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
 *
 *      https://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 org.hipparchus.stat;

import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.hipparchus.exception.Localizable;
import org.hipparchus.exception.UTF8Control;

/**
 * Enumeration for localized messages formats used in exceptions messages.
 * <p>
 * The constants in this enumeration represent the available formats as
 * localized strings. These formats are intended to be localized using simple
 * properties files, using the constant name as the key and the property value
 * as the message format. The source English format is provided in the constants
 * themselves to serve both as a reminder for developers to understand the
 * parameters needed by each format, as a basis for translators to create
 * localized properties files, and as a default format if some translation is
 * missing.
 * </p>
 */
public enum LocalizedStatFormats implements Localizable {

    /** TIES_ARE_NOT_ALLOWED. */
    TIES_ARE_NOT_ALLOWED("Ties are not allowed."),

    /** INSUFFICIENT_DATA_FOR_T_STATISTIC. */
    INSUFFICIENT_DATA_FOR_T_STATISTIC("insufficient data for t statistic, needs at least 2, got {0}"),

    /** NOT_ENOUGH_DATA_REGRESSION. */
    NOT_ENOUGH_DATA_REGRESSION("the number of observations is not sufficient to conduct regression"),

    /** INVALID_REGRESSION_OBSERVATION. */
    INVALID_REGRESSION_OBSERVATION("length of regressor array = {0} does not match the number of variables = {1} in the model"),

    /** NOT_ENOUGH_DATA_FOR_NUMBER_OF_PREDICTORS. */
    NOT_ENOUGH_DATA_FOR_NUMBER_OF_PREDICTORS("not enough data ({0} rows) for this many predictors ({1} predictors)"),

    /** NOT_SUPPORTED_NAN_STRATEGY. */
    NOT_SUPPORTED_NAN_STRATEGY("NaN strategy {0} not supported"),

    /** NO_REGRESSORS. */
    NO_REGRESSORS("Regression model must include at least one regressor"),

    /** COVARIANCE_MATRIX. */
    COVARIANCE_MATRIX("covariance matrix"),

    /** OUT_OF_BOUNDS_QUANTILE_VALUE. */
    OUT_OF_BOUNDS_QUANTILE_VALUE("out of bounds quantile value: {0}, must be in (0, 100]"),

    /** OUT_OF_BOUNDS_CONFIDENCE_LEVEL. */
    OUT_OF_BOUNDS_CONFIDENCE_LEVEL("out of bounds confidence level {0}, must be between {1} and {2}"),

    /** OUT_OF_BOUND_SIGNIFICANCE_LEVEL. */
    OUT_OF_BOUND_SIGNIFICANCE_LEVEL("out of bounds significance level {0}, must be between {1} and {2}"),

    /** SIGNIFICANCE_LEVEL. */
    SIGNIFICANCE_LEVEL("significance level ({0})"),

    /** TOO_MANY_REGRESSORS. */
    TOO_MANY_REGRESSORS("too many regressors ({0}) specified, only {1} in the model"),

    /** TWO_OR_MORE_CATEGORIES_REQUIRED. */
    TWO_OR_MORE_CATEGORIES_REQUIRED("two or more categories required, got {0}"),

    /** TWO_OR_MORE_VALUES_IN_CATEGORY_REQUIRED. */
    TWO_OR_MORE_VALUES_IN_CATEGORY_REQUIRED("two or more values required in each category, one has {0}"),

    /** ILLEGAL_STATE_PCA. */
    ILLEGAL_STATE_PCA("you must fit the PCA projection before calling {0}");

    /** Source English format. */
    private final String sourceFormat;

    /**
     * Simple constructor.
     *
     * @param sourceFormat source English format to use when no localized
     *        version is available
     */
    LocalizedStatFormats(final String sourceFormat) {
        this.sourceFormat = sourceFormat;
    }

    /** {@inheritDoc} */
    @Override
    public String getSourceString() {
        return sourceFormat;
    }

    /** {@inheritDoc} */
    @Override
    public String getLocalizedString(final Locale locale) {
        try {
            final String path = LocalizedStatFormats.class.getName()
                .replaceAll("\\.", "/");
            ResourceBundle bundle = ResourceBundle
                .getBundle("assets/" + path, locale, new UTF8Control());
            if (bundle.getLocale().getLanguage().equals(locale.getLanguage())) {
                final String translated = bundle.getString(name());
                if ((translated != null) && (translated.length() > 0) &&
                    (!translated.toLowerCase(locale).contains("missing translation"))) {
                    // the value of the resource is the translated format
                    return translated;
                }
            }

        } catch (MissingResourceException mre) { // NOPMD
            // do nothing here
        }

        // either the locale is not supported or the resource is unknown
        // don't translate and fall back to using the source format
        return sourceFormat;

    }

}