/*******************************************************************************
 *  ============LICENSE_START=======================================================
 *  org.onap.dmaap
 *  ================================================================================
 *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 *  ================================================================================
 *  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.
 *  ============LICENSE_END=========================================================
 *  
 *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
 *  
 *******************************************************************************/
package org.onap.dmaap.dmf.mr;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
/**
 * CambriaApiVersionInfo will provide the version of cambria code
 * 
 * @author peter
 *
 */
public class CambriaApiVersionInfo {
    
	/**
	 * 3 constants are defined:-
	 * PROPS,VERSION and LOG
	 */
	
	private static final Properties PROPS = new Properties();
    private static final String VERSION;


    private static final EELFLogger LOG = EELFManager.getInstance().getLogger(CambriaApiVersionInfo.class);
    
    /**
     * private constructor created with no argument
     * to avoid default constructor
     */
    private CambriaApiVersionInfo()
    {
    	
    }
    
    /**
     * returns version of String type
     */
    public static String getVersion() {
        return VERSION;
    }

    /** 
     * 
     * defines static initialization method
     * It initializes VERSION Constant
     * it handles exception in try catch block 
     * and throws IOException
     * 
     */
    
    static {
        String use = null;
        try {
            final InputStream is = CambriaApiVersionInfo.class
                    .getResourceAsStream("/cambriaApiVersion.properties");
            if (is != null) {
            	PROPS.load(is);
                use = PROPS.getProperty("cambriaApiVersion", null);
            }
        } catch (IOException e) {
            LOG.error("Failed due to IO EXception:"+e);
        }
        VERSION = use;
    }
}