org.springframework.boot.configurationmetadata.SimpleConfigurationMetadataRepository.java Source code

Introduction

Here is the source code for org.springframework.boot.configurationmetadata.SimpleConfigurationMetadataRepository.java

Source

/*
 * Copyright 2012-2017 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.configurationmetadata;

import java.io.Serializable;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * The default {@link ConfigurationMetadataRepository} implementation.
 *
 * @author Stephane Nicoll
 * @since 1.3.0
 */
@SuppressWarnings("serial")
public class SimpleConfigurationMetadataRepository implements ConfigurationMetadataRepository, Serializable {

    private final Map<String, ConfigurationMetadataGroup> allGroups = new HashMap<>();

    @Override
    public Map<String, ConfigurationMetadataGroup> getAllGroups() {
        return Collections.unmodifiableMap(this.allGroups);
    }

    @Override
    public Map<String, ConfigurationMetadataProperty> getAllProperties() {
        Map<String, ConfigurationMetadataProperty> properties = new HashMap<>();
        for (ConfigurationMetadataGroup group : this.allGroups.values()) {
            properties.putAll(group.getProperties());
        }
        return properties;
    }

    /**
     * Register the specified {@link ConfigurationMetadataSource sources}.
     * @param sources the sources to add
     */
    public void add(Collection<ConfigurationMetadataSource> sources) {
        for (ConfigurationMetadataSource source : sources) {
            String groupId = source.getGroupId();
            ConfigurationMetadataGroup group = this.allGroups.get(groupId);
            if (group == null) {
                group = new ConfigurationMetadataGroup(groupId);
                this.allGroups.put(groupId, group);
            }
            String sourceType = source.getType();
            if (sourceType != null) {
                putIfAbsent(group.getSources(), sourceType, source);
            }
        }
    }

    /**
     * Add a {@link ConfigurationMetadataProperty} with the
     * {@link ConfigurationMetadataSource source} that defines it, if any.
     * @param property the property to add
     * @param source the source
     */
    public void add(ConfigurationMetadataProperty property, ConfigurationMetadataSource source) {
        if (source != null) {
            putIfAbsent(source.getProperties(), property.getId(), property);
        }
        putIfAbsent(getGroup(source).getProperties(), property.getId(), property);
    }

    /**
     * Merge the content of the specified repository to this repository.
     * @param repository the repository to include
     */
    public void include(ConfigurationMetadataRepository repository) {
        for (ConfigurationMetadataGroup group : repository.getAllGroups().values()) {
            ConfigurationMetadataGroup existingGroup = this.allGroups.get(group.getId());
            if (existingGroup == null) {
                this.allGroups.put(group.getId(), group);
            } else {
                // Merge properties
                for (Map.Entry<String, ConfigurationMetadataProperty> entry : group.getProperties().entrySet()) {
                    putIfAbsent(existingGroup.getProperties(), entry.getKey(), entry.getValue());
                }
                // Merge sources
                for (Map.Entry<String, ConfigurationMetadataSource> entry : group.getSources().entrySet()) {
                    putIfAbsent(existingGroup.getSources(), entry.getKey(), entry.getValue());
                }
            }
        }

    }

    private ConfigurationMetadataGroup getGroup(ConfigurationMetadataSource source) {
        if (source == null) {
            ConfigurationMetadataGroup rootGroup = this.allGroups.get(ROOT_GROUP);
            if (rootGroup == null) {
                rootGroup = new ConfigurationMetadataGroup(ROOT_GROUP);
                this.allGroups.put(ROOT_GROUP, rootGroup);
            }
            return rootGroup;
        }
        return this.allGroups.get(source.getGroupId());
    }

    private <V> void putIfAbsent(Map<String, V> map, String key, V value) {
        if (!map.containsKey(key)) {
            map.put(key, value);
        }
    }

}