com.formulasearchengine.mathmltools.converters.config.ConfigLoader Maven / Gradle / Ivy

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package com.formulasearchengine.mathmltools.converters.config;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Properties;

public class ConfigLoader {

    private ConfigLoader() { }

    public static final String GITHUB_URL = "github";
    public static final String GITHUB_REPO_NAME = "github.repo.name";
    public static final String GITHUB_REPO_OWNER = "github.repo.owner";
    public static final String GITHUB_REPO_PATH = "github.repo.subpath";
    public static final String GOULDI_MAXIMUM_NUM = "gouldi.max";
    public static final String GOULDI_LOCAL_PATH = "gouldi.local";
    private static final Logger LOG = LogManager.getLogger(ConfigLoader.class.getName());
    public static final Properties CONFIG = loadConfiguration();
    private static final String THIRDPARTY_PREFIX = "thirdparty.";
    public static final String MATHEMATICAL = THIRDPARTY_PREFIX + "mathematical";
    public static final String MATH_TO_WEB = THIRDPARTY_PREFIX + "mathtoweb";
    public static final String LATEX2MML = THIRDPARTY_PREFIX + "latex2mathml";
    public static final String POM_MLP = THIRDPARTY_PREFIX + "pom.jar";
    public static final String POM_REFERENCE_DIR = THIRDPARTY_PREFIX + "pom.referenceData";

    private static Properties loadConfiguration() {
        Path config = new PathBuilder()
                .initResourcesPath()
                .addSubPath("config.properties")
                .build();

        try {
            return loadConfiguration(config);
        } catch (FileNotFoundException e) {
            return null;
        }
    }

    private static Properties loadConfiguration(Path configFile)
            throws FileNotFoundException {
        File config = configFile.toFile();
        if (!config.exists()) {
            throw new FileNotFoundException("Cannot find configuration file! " + configFile.toAbsolutePath().toString());
        }

        Properties props = new Properties();
        try (FileInputStream in = new FileInputStream(config)) {
            props.load(in);
            return props;
        } catch (IOException ioe) {
            LOG.error("Cannot load config file!", ioe);
            return null;
        }
    }
}