/*
* 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
*
* http://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.properties.bind.handler;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
import org.springframework.boot.context.properties.bind.AbstractBindHandler;
import org.springframework.boot.context.properties.bind.BindContext;
import org.springframework.boot.context.properties.bind.BindHandler;
import org.springframework.boot.context.properties.bind.Bindable;
import org.springframework.boot.context.properties.bind.UnboundConfigurationPropertiesException;
import org.springframework.boot.context.properties.source.ConfigurationProperty;
import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
import org.springframework.boot.context.properties.source.IterableConfigurationPropertySource;
/**
* {@link BindHandler} to enforce that all configuration properties under the root name
* have been bound.
*
* @author Phillip Webb
* @author Madhura Bhave
* @since 2.0.0
*/
public class NoUnboundElementsBindHandler extends AbstractBindHandler {
private final Set<ConfigurationPropertyName> boundNames = new HashSet<>();
NoUnboundElementsBindHandler() {
super();
}
public NoUnboundElementsBindHandler(BindHandler parent) {
super(parent);
}
@Override
public Object onSuccess(ConfigurationPropertyName name, Bindable<?> target,
BindContext context, Object result) {
this.boundNames.add(name);
return super.onSuccess(name, target, context, result);
}
@Override
public void onFinish(ConfigurationPropertyName name, Bindable<?> target,
BindContext context, Object result) throws Exception {
if (context.getDepth() == 0) {
checkNoUnboundElements(name, context);
}
}
private void checkNoUnboundElements(ConfigurationPropertyName name,
BindContext context) {
Set<ConfigurationProperty> unbound = new TreeSet<>();
for (ConfigurationPropertySource source : context.getSources()) {
if (source instanceof IterableConfigurationPropertySource) {
collectUnbound(name, unbound,
(IterableConfigurationPropertySource) source);
}
}
if (!unbound.isEmpty()) {
throw new UnboundConfigurationPropertiesException(unbound);
}
}
private void collectUnbound(ConfigurationPropertyName name,
Set<ConfigurationProperty> unbound,
IterableConfigurationPropertySource source) {
IterableConfigurationPropertySource filtered = source
.filter((candidate) -> isUnbound(name, candidate));
for (ConfigurationPropertyName unboundName : filtered) {
try {
unbound.add(source.filter((candidate) -> isUnbound(name, candidate))
.getConfigurationProperty(unboundName));
}
catch (Exception ex) {
}
}
}
private boolean isUnbound(ConfigurationPropertyName name,
ConfigurationPropertyName candidate) {
return name.isAncestorOf(candidate) && !this.boundNames.contains(candidate);
}
}