ApplicationConfiguration.java

package com.github.xsavikx.androidscreencast.configuration;

import com.github.xsavikx.androidscreencast.exception.AndroidScreenCastRuntimeException;

import javax.inject.Inject;
import javax.inject.Singleton;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

@Singleton
public class ApplicationConfiguration {
    private static final String PROPERTIES_LOCATION = "./app.properties";
    private final Properties properties;

    @Inject
    public ApplicationConfiguration() {
        properties = initProperties();
    }

    private Properties initProperties() {
        final Properties properties = new Properties();
        loadProperties(properties, PROPERTIES_LOCATION);
        return properties;
    }

    private void loadProperties(final Properties properties, final String propertiesLocation) {
        final File propertiesFile = new File(propertiesLocation);
        if (propertiesFile.exists()) {
            try (final FileInputStream fis = new FileInputStream(propertiesFile)) {
                properties.load(fis);
            } catch (final IOException e) {
                throw new AndroidScreenCastRuntimeException(e);
            }
        }
    }

    public String getProperty(final ApplicationConfigurationProperty configurationProperty) {
        final String property = properties.getProperty(configurationProperty.getPropertyKey(), configurationProperty.getDefaultValue());
        return property;
    }
}