spring OriginTrackedMapPropertySource 源码

  • 2022-08-12
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springboot OriginTrackedMapPropertySource 代码

文件路径:/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/OriginTrackedMapPropertySource.java

/*
 * Copyright 2012-2022 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
 *
 *      https://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.util.Map;

import org.springframework.boot.origin.Origin;
import org.springframework.boot.origin.OriginLookup;
import org.springframework.boot.origin.OriginTrackedValue;
import org.springframework.core.env.MapPropertySource;

/**
 * {@link OriginLookup} backed by a {@link Map} containing {@link OriginTrackedValue
 * OriginTrackedValues}.
 *
 * @author Madhura Bhave
 * @author Phillip Webb
 * @since 2.0.0
 * @see OriginTrackedValue
 */
public final class OriginTrackedMapPropertySource extends MapPropertySource implements OriginLookup<String> {

	private final boolean immutable;

	/**
	 * Create a new {@link OriginTrackedMapPropertySource} instance.
	 * @param name the property source name
	 * @param source the underlying map source
	 */
	@SuppressWarnings("rawtypes")
	public OriginTrackedMapPropertySource(String name, Map source) {
		this(name, source, false);
	}

	/**
	 * Create a new {@link OriginTrackedMapPropertySource} instance.
	 * @param name the property source name
	 * @param source the underlying map source
	 * @param immutable if the underlying source is immutable and guaranteed not to change
	 * @since 2.2.0
	 */
	@SuppressWarnings({ "unchecked", "rawtypes" })
	public OriginTrackedMapPropertySource(String name, Map source, boolean immutable) {
		super(name, source);
		this.immutable = immutable;
	}

	@Override
	public Object getProperty(String name) {
		Object value = super.getProperty(name);
		if (value instanceof OriginTrackedValue originTrackedValue) {
			return originTrackedValue.getValue();
		}
		return value;
	}

	@Override
	public Origin getOrigin(String name) {
		Object value = super.getProperty(name);
		if (value instanceof OriginTrackedValue originTrackedValue) {
			return originTrackedValue.getOrigin();
		}
		return null;
	}

	@Override
	public boolean isImmutable() {
		return this.immutable;
	}

}

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