pzalejko.iot.hardware.home.core.service.configuration.DefaultTemperatureConfiguration.java Source code

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Here is the source code for pzalejko.iot.hardware.home.core.service.configuration.DefaultTemperatureConfiguration.java

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/*******************************************************************************
 * Copyright (c) 2015 Pawel Zalejko(p.zalejko@gmail.com).
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License Version 2.0
 * which accompanies this distribution, and is available at
 * http://www.apache.org/licenses/
 *******************************************************************************/

package pzalejko.iot.hardware.home.core.service.configuration;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;

import java.text.MessageFormat;
import java.util.Properties;

import pzalejko.iot.hardware.home.api.config.TemperatureSensorConfiguration;
import pzalejko.iot.hardware.home.core.util.LogMessages;

import com.google.common.base.Strings;

public class DefaultTemperatureConfiguration implements TemperatureSensorConfiguration {

    private static final String READ_FREQ_KEY = "read.frequency";
    private static final String SOURCE_FILE_NAME_KEY = "source.file.name";
    private static final String SOURCE_DICTIONARY_KEY = "source.file.dictionary";

    private final Long readFrequency;
    private final String sourceFilePath;
    private final String fileName;

    public DefaultTemperatureConfiguration(Properties properties) {
        checkNotNull(properties);
        readFrequency = Long.parseLong(Strings.nullToEmpty(properties.getProperty(READ_FREQ_KEY)));
        sourceFilePath = Strings.nullToEmpty(properties.getProperty(SOURCE_DICTIONARY_KEY));
        fileName = Strings.nullToEmpty(properties.getProperty(SOURCE_FILE_NAME_KEY));

        checkArgument(readFrequency > 0);
        checkArgument(!sourceFilePath.isEmpty(),
                MessageFormat.format(LogMessages.TEMP_SERVICE_MISSING_PROPERTY, SOURCE_DICTIONARY_KEY));
        checkArgument(!fileName.isEmpty(),
                MessageFormat.format(LogMessages.TEMP_SERVICE_MISSING_PROPERTY, SOURCE_FILE_NAME_KEY));
    }

    @Override
    public long getReadFrequency() {
        return readFrequency;
    }

    @Override
    public String getSourceDirectoryPath() {
        return sourceFilePath;
    }

    @Override
    public String getSourceFileName() {
        return fileName;
    }
}