Spring Framework example source code file (SystemProfileValueSource.java)

This example Spring Framework source code file (SystemProfileValueSource.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

instance, instance, profilevaluesource, profilevaluesource, string, string, systemprofilevaluesource, systemprofilevaluesource

The Spring Framework SystemProfileValueSource.java source code

/*
 * Copyright 2002-2007 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.test.annotation;

import org.springframework.util.Assert;

/**
 * Implementation of {@link ProfileValueSource} which uses system properties as
 * the underlying source.
 *
 * @author Rod Johnson
 * @author Sam Brannen
 * @since 2.0
 */
public class SystemProfileValueSource implements ProfileValueSource {

	private static final SystemProfileValueSource INSTANCE = new SystemProfileValueSource();


	/**
	 * Obtain the canonical instance of this ProfileValueSource.
	 */
	public static final SystemProfileValueSource getInstance() {
		return INSTANCE;
	}


	/**
	 * Private constructor, enforcing the singleton pattern.
	 */
	private SystemProfileValueSource() {
	}

	/**
	 * Get the <em>profile value indicated by the specified key from the
	 * system properties.
	 * @see System#getProperty(String)
	 */
	public String get(String key) {
		Assert.hasText(key, "'key' must not be empty");
		return System.getProperty(key);
	}

}