001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spi;
018
019import org.apache.camel.Ordered;
020
021/**
022 * A source for properties.
023 * <p/>
024 * A source can implement {@link Ordered} to control the ordering of which sources are used by the Camel
025 * properties component. The source with the highest precedence (lowest number) will be used first.
026 */
027public interface PropertiesSource {
028
029    /**
030     * Name of properties source
031     */
032    String getName();
033
034    /**
035     * Gets the property with the name
036     *
037     * @param name name of property
038     * @return the property value, or <tt>null</tt> if no property exists
039     */
040    String getProperty(String name);
041
042}