org.springframework.boot.config.PropertiesPropertySourceLoader.java Source code

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Here is the source code for org.springframework.boot.config.PropertiesPropertySourceLoader.java

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/*
 * Copyright 2012-2013 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.config;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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
 */
public class PropertiesPropertySourceLoader implements PropertySourceLoader {

    private static Log logger = LogFactory.getLog(PropertiesPropertySourceLoader.class);

    @Override
    public boolean supports(Resource resource) {
        return resource.getFilename().endsWith(".properties");
    }

    @Override
    public PropertySource<?> load(Resource resource) {
        try {
            Properties properties = loadProperties(resource);
            // N.B. this is off by default unless user has supplied logback config in
            // standard location
            if (logger.isDebugEnabled()) {
                logger.debug("Properties loaded from " + resource + ": " + properties);
            }
            return new PropertiesPropertySource(resource.getDescription(), properties);
        } catch (IOException ex) {
            throw new IllegalStateException("Could not load properties from " + resource, ex);
        }
    }

    protected Properties loadProperties(Resource resource) throws IOException {
        return PropertiesLoaderUtils.loadProperties(resource);
    }
}