org.springframework.beans.factory.config.YamlMapFactoryBean Maven / Gradle / Ivy
/*
* Copyright 2002-2016 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.beans.factory.config;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
/**
* Factory for a {@code Map} that reads from a YAML source, preserving the
* YAML-declared value types and their structure.
*
* YAML is a nice human-readable format for configuration, and it has some
* useful hierarchical properties. It's more or less a superset of JSON, so it
* has a lot of similar features.
*
*
If multiple resources are provided the later ones will override entries in
* the earlier ones hierarchically; that is, all entries with the same nested key
* of type {@code Map} at any depth are merged. For example:
*
*
* foo:
* bar:
* one: two
* three: four
*
*
* plus (later in the list)
*
*
* foo:
* bar:
* one: 2
* five: six
*
*
* results in an effective input of
*
*
* foo:
* bar:
* one: 2
* three: four
* five: six
*
*
* Note that the value of "foo" in the first document is not simply replaced
* with the value in the second, but its nested values are merged.
*
* @author Dave Syer
* @author Juergen Hoeller
* @since 4.1
*/
public class YamlMapFactoryBean extends YamlProcessor implements FactoryBean