org.springframework.boot.context.config.ConfigDataEnvironmentContributorPlaceholdersResolver Maven / Gradle / Ivy
/*
* Copyright 2012-2023 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.context.config;
import org.springframework.boot.context.config.ConfigDataEnvironmentContributor.Kind;
import org.springframework.boot.context.properties.bind.PlaceholdersResolver;
import org.springframework.boot.origin.Origin;
import org.springframework.boot.origin.OriginLookup;
import org.springframework.core.env.PropertySource;
import org.springframework.util.PropertyPlaceholderHelper;
import org.springframework.util.SystemPropertyUtils;
/**
* {@link PlaceholdersResolver} backed by one or more
* {@link ConfigDataEnvironmentContributor} instances.
*
* @author Phillip Webb
* @author Madhura Bhave
*/
class ConfigDataEnvironmentContributorPlaceholdersResolver implements PlaceholdersResolver {
private final Iterable contributors;
private final ConfigDataActivationContext activationContext;
private final boolean failOnResolveFromInactiveContributor;
private final PropertyPlaceholderHelper helper;
private final ConfigDataEnvironmentContributor activeContributor;
ConfigDataEnvironmentContributorPlaceholdersResolver(Iterable contributors,
ConfigDataActivationContext activationContext, ConfigDataEnvironmentContributor activeContributor,
boolean failOnResolveFromInactiveContributor) {
this.contributors = contributors;
this.activationContext = activationContext;
this.activeContributor = activeContributor;
this.failOnResolveFromInactiveContributor = failOnResolveFromInactiveContributor;
this.helper = new PropertyPlaceholderHelper(SystemPropertyUtils.PLACEHOLDER_PREFIX,
SystemPropertyUtils.PLACEHOLDER_SUFFIX, SystemPropertyUtils.VALUE_SEPARATOR, true);
}
@Override
public Object resolvePlaceholders(Object value) {
if (value instanceof String string) {
return this.helper.replacePlaceholders(string, this::resolvePlaceholder);
}
return value;
}
private String resolvePlaceholder(String placeholder) {
Object result = null;
for (ConfigDataEnvironmentContributor contributor : this.contributors) {
PropertySource propertySource = contributor.getPropertySource();
Object value = (propertySource != null) ? propertySource.getProperty(placeholder) : null;
if (value != null && !isActive(contributor)) {
if (this.failOnResolveFromInactiveContributor) {
ConfigDataResource resource = contributor.getResource();
Origin origin = OriginLookup.getOrigin(propertySource, placeholder);
throw new InactiveConfigDataAccessException(propertySource, resource, placeholder, origin);
}
value = null;
}
result = (result != null) ? result : value;
}
return (result != null) ? String.valueOf(result) : null;
}
private boolean isActive(ConfigDataEnvironmentContributor contributor) {
if (contributor == this.activeContributor) {
return true;
}
if (contributor.getKind() != Kind.UNBOUND_IMPORT) {
return contributor.isActive(this.activationContext);
}
return contributor.withBoundProperties(this.contributors, this.activationContext)
.isActive(this.activationContext);
}
}