com.tngtech.configbuilder.configuration.ErrorMessageSetup Maven / Gradle / Ivy

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The Config Builder creates fully configured instances of config classes, using values from various sources like properties files, command line arguments etc.

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package com.tngtech.configbuilder.configuration;

import com.tngtech.propertyloader.PropertyLoader;

import java.util.Enumeration;
import java.util.Properties;
import java.util.ResourceBundle;

/**
 * Stores error messages for the ConfigBuilder in a Properties object.
 */
public class ErrorMessageSetup {

    private Properties errorMessages;

    /**
     * loads the default error messages for the system locale, then merges them with additional error messages loaded with the PropertyLoader
     *
     * @param baseName       the filename for additional error messages
     * @param propertyLoader the PropertyLoader used to load additional error messages
     */
    public void initialize(String baseName, PropertyLoader propertyLoader) {
        ResourceBundle resourceBundle = ResourceBundle.getBundle("errors");
        errorMessages = convertResourceBundleToProperties(resourceBundle);
        if (baseName != null) {
            errorMessages.putAll(propertyLoader.load(baseName));
        }
    }

    private Properties convertResourceBundleToProperties(ResourceBundle resource) {
        Properties properties = new Properties();

        Enumeration keys = resource.getKeys();
        while (keys.hasMoreElements()) {
            String key = keys.nextElement();
            properties.put(key, resource.getString(key));
        }
        return properties;
    }

    public String getErrorMessage(Throwable e, String... variables) {
        String message = errorMessages.getProperty(e.getClass().getName());
        return message == null ? String.format(errorMessages.getProperty("standardMessage"), e.getClass().getName()) : String.format(message, variables);
    }

    public String getErrorMessage(Class exceptionClass, String... variables) {
        String message = errorMessages.getProperty(exceptionClass.getName());
        return message == null ? String.format(errorMessages.getProperty("standardMessage"), exceptionClass.getName()) : String.format(message, variables);
    }
}