ch.nydi.spring.config.SystemPropertiesFactoryBean.java Source code

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Here is the source code for ch.nydi.spring.config.SystemPropertiesFactoryBean.java

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/*
 * Copyright 2011 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 ch.nydi.spring.config;

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

import org.springframework.beans.factory.config.PropertiesFactoryBean;

/**
 * Use {@link PropertiesFactoryBean} and propagates the properties to system properties if propagateToSystemProperties
 * is enabled.
 * 
 * @author Daniel Nydegger
 */
public class SystemPropertiesFactoryBean extends PropertiesFactoryBean {

    private boolean propagateToSystemProperties = false;

    /**
     * Enables or disables property propagation to system properties, default is disabled.
     * 
     * @param propagateToSystemProperties
     */
    public void setPropagateToSystemProperties(final boolean propagateToSystemProperties) {
        this.propagateToSystemProperties = propagateToSystemProperties;
    }

    @Override
    protected Properties createProperties() throws IOException {
        final Properties originalProperties = super.createProperties();
        final Properties propertiesReplaced = new Properties();

        final PropertyVariableParser propertyParser = new PropertyVariableParser();

        for (final Map.Entry<Object, Object> entry : originalProperties.entrySet()) {
            propertiesReplaced.put(entry.getKey(), propertyParser.replaceVariables((String) entry.getValue()));
        }

        if (propagateToSystemProperties) {
            final Properties systemProperties = System.getProperties();
            systemProperties.putAll(propertiesReplaced);
            System.setProperties(systemProperties);
        }

        return propertiesReplaced;
    }
}