org.elasticsearch.common.inject.internal.BindingBuilder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Copyright (C) 2008 Google Inc.
*
* 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.elasticsearch.common.inject.internal;
import org.elasticsearch.common.inject.Binder;
import org.elasticsearch.common.inject.ConfigurationException;
import org.elasticsearch.common.inject.Key;
import org.elasticsearch.common.inject.Provider;
import org.elasticsearch.common.inject.binder.AnnotatedBindingBuilder;
import org.elasticsearch.common.inject.spi.Element;
import org.elasticsearch.common.inject.spi.InjectionPoint;
import org.elasticsearch.common.inject.spi.Message;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import static java.util.Collections.emptySet;
/**
* Bind a non-constant key.
*
* @author [email protected] (Jesse Wilson)
*/
public class BindingBuilder extends AbstractBindingBuilder implements AnnotatedBindingBuilder {
public BindingBuilder(Binder binder, List elements, Object source, Key key) {
super(binder, elements, source, key);
}
@Override
public BindingBuilder to(Class implementation) {
Key linkedKey = Key.get(implementation);
Objects.requireNonNull(linkedKey, "linkedKey");
checkNotTargetted();
BindingImpl base = getBinding();
setBinding(new LinkedBindingImpl<>(base.getSource(), base.getKey(), base.getScoping(), linkedKey));
return this;
}
@Override
public void toInstance(T instance) {
checkNotTargetted();
// lookup the injection points, adding any errors to the binder's errors list
Set injectionPoints;
if (instance != null) {
try {
injectionPoints = InjectionPoint.forInstanceMethodsAndFields(instance.getClass());
} catch (ConfigurationException e) {
for (Message message : e.getErrorMessages()) {
binder.addError(message);
}
injectionPoints = Set.copyOf(e.getPartialValue());
}
} else {
binder.addError(BINDING_TO_NULL);
injectionPoints = emptySet();
}
BindingImpl base = getBinding();
setBinding(new InstanceBindingImpl<>(base.getSource(), base.getKey(), base.getScoping(), injectionPoints, instance));
}
@Override
public BindingBuilder toProvider(Provider provider) {
Objects.requireNonNull(provider, "provider");
checkNotTargetted();
// lookup the injection points, adding any errors to the binder's errors list
Set injectionPoints;
try {
injectionPoints = InjectionPoint.forInstanceMethodsAndFields(provider.getClass());
} catch (ConfigurationException e) {
for (Message message : e.getErrorMessages()) {
binder.addError(message);
}
injectionPoints = Set.copyOf(e.getPartialValue());
}
BindingImpl base = getBinding();
setBinding(new ProviderInstanceBindingImpl<>(base.getSource(), base.getKey(), base.getScoping(), injectionPoints, provider));
return this;
}
@Override
public String toString() {
return "BindingBuilder<" + getBinding().getKey().getTypeLiteral() + ">";
}
}