001/* 002 * Copyright 2002-2020 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core.env; 018 019import java.util.Map; 020 021import org.springframework.lang.Nullable; 022import org.springframework.util.StringUtils; 023 024/** 025 * {@link PropertySource} that reads keys and values from a {@code Map} object. 026 * The underlying map should not contain any {@code null} values in order to 027 * comply with {@link #getProperty} and {@link #containsProperty} semantics. 028 * 029 * @author Chris Beams 030 * @author Juergen Hoeller 031 * @since 3.1 032 * @see PropertiesPropertySource 033 */ 034public class MapPropertySource extends EnumerablePropertySource<Map<String, Object>> { 035 036 /** 037 * Create a new {@code MapPropertySource} with the given name and {@code Map}. 038 * @param name the associated name 039 * @param source the Map source (without {@code null} values in order to get 040 * consistent {@link #getProperty} and {@link #containsProperty} behavior) 041 */ 042 public MapPropertySource(String name, Map<String, Object> source) { 043 super(name, source); 044 } 045 046 047 @Override 048 @Nullable 049 public Object getProperty(String name) { 050 return this.source.get(name); 051 } 052 053 @Override 054 public boolean containsProperty(String name) { 055 return this.source.containsKey(name); 056 } 057 058 @Override 059 public String[] getPropertyNames() { 060 return StringUtils.toStringArray(this.source.keySet()); 061 } 062 063}