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/*******************************************************************************
 * ============LICENSE_START====================================================
 * * org.onap.aaf
 * * ===========================================================================
 * * 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.aaf.inno.env;

import java.util.Map;

public interface EnvProps extends Env {
	public interface EnvProperty {
		public String getProperty(String input);
	};

	/**
	 * Obtain a Property (String) based on a Key.  Implementor decides how
	 * that works, i.e. from a complex set of Configurations, or just 
	 * "System" (Java standard)
	 * 
	 * @param key
	 * @return APIException
	 */
	public String getProperty(String key);

	/**
	 * Obtain a Property (String) based on a Key.  Implementor decides how
	 * that works, i.e. from a complex set of Configurations, or just 
	 * "System" (Java standard)
	 * 
	 * If Property Value is null, then default will be used.
	 * @param key
	 * @return APIException
	 */
	public String getProperty(String tag, String defaultValue);

	/**
	 * Set a Property (String) based on a Key accessible to all in Env.  Implementor decides how
	 * that works, i.e. from a complex set of Configurations, or just 
	 * "System" (Java standard)
	 * 
	 * @param key
	 * @return APIException
	 */
	public String setProperty(String key, String value);
	
	/**
	 * Get the SubProperties based on key.
	 * 
	 * use "false" to remove prefix, "true" to leave prefix in.
	 * 
	 * @param key
	 * @return APIException
	 * Given a known property set (or in this case, properties starting with key), 
	 * return map of all properties with appropriate key names
	 */
	public Map<String, String> getSubProperties(String key, boolean includePrefix);

	/**
	 * Get all of the properties in the Environment
	 * @return
	 */
	public Map<String, String> getProperties();

}