com.meltmedia.cadmium.core.config.impl.PropertiesReaderImpl.java Source code

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Here is the source code for com.meltmedia.cadmium.core.config.impl.PropertiesReaderImpl.java

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/**
 *    Copyright 2012 meltmedia
 *
 *    Licensed 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
 *
 *        http://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 com.meltmedia.cadmium.core.config.impl;

import java.io.File;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Properties;
import javax.servlet.ServletContext;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;

import com.meltmedia.cadmium.core.config.PropertiesReader;

/**
 * This implements the PropertiesReader Interface.  For use in the ConfigManager class 
 * 
 * @author Brian Barr
 */

public class PropertiesReaderImpl implements PropertiesReader {

    @Override
    public Properties getProperties(File file, Logger log) {

        Properties properties = new Properties();
        readPropertiesWithReader(properties, file, log);
        return properties;
    }

    @Override
    public Properties getProperties(ServletContext context, String path, Logger log) {

        Properties properties = new Properties();
        readPropertiesWithContext(properties, context, path, log);
        return properties;
    }

    @Override
    public Properties getProperties(InputStream stream, Logger log) {

        Properties properties = new Properties();
        readPropertiesWithInputStream(properties, stream, log);
        return properties;
    }

    @Override
    public Properties appendProperties(Properties properties, File configFile, Logger log) {

        readPropertiesWithReader(properties, configFile, log);
        return properties;
    }

    private void readPropertiesWithReader(Properties properties, File file, Logger log) {

        Reader reader = null;
        try {

            log.trace("configFile path: {}", file.getPath());
            reader = new FileReader(file);
            properties.load(reader);
        } catch (Exception e) {

            log.warn("Failed to load " + file.getAbsolutePath());
        } finally {

            IOUtils.closeQuietly(reader);
        }

    }

    private void readPropertiesWithInputStream(Properties properties, InputStream stream, Logger log) {

        try {

            properties.load(stream);
        } catch (Exception e) {

            log.warn("Failed to load properties");
        } finally {

            IOUtils.closeQuietly(stream);
        }

    }

    private void readPropertiesWithContext(Properties properties, ServletContext context, String path, Logger log) {

        Reader reader = null;
        try {

            reader = new InputStreamReader(context.getResourceAsStream(path), "UTF-8");
            properties.load(reader);

        } catch (Exception e) {

            log.warn("Failed to load " + path);
        } finally {

            IOUtils.closeQuietly(reader);
        }

    }

}