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/*
 * Copyright 2012-2014 the original author or authors.
 *
 * 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 org.springframework.boot.env;

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

import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

/**
 * Strategy to load '.properties' files into a {@link PropertySource}.
 *
 * @author Dave Syer
 * @author Phillip Webb
 */
public class PropertiesPropertySourceLoader implements PropertySourceLoader {

	@Override
	public String[] getFileExtensions() {
		return new String[] { "properties", "xml" };
	}

	@Override
	public PropertySource load(String name, Resource resource, String profile)
			throws IOException {
		if (profile == null) {
			Properties properties = PropertiesLoaderUtils.loadProperties(resource);
			if (!properties.isEmpty()) {
				return new PropertiesPropertySource(name, properties);
			}
		}
		return null;
	}

}




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