com.google.inject.spi.StaticInjectionRequest Maven / Gradle / Ivy
/**
* 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 com.google.inject.spi;
import com.google.inject.Binder;
import com.google.inject.ConfigurationException;
import static com.google.inject.internal.util.Preconditions.checkNotNull;
import java.util.Set;
/**
* A request to inject the static fields and methods of a type. Requests are created
* explicitly in a module using {@link com.google.inject.Binder#requestStaticInjection(Class[])
* requestStaticInjection()} statements:
*
* requestStaticInjection(MyLegacyService.class);
*
* @author [email protected] (Jesse Wilson)
* @since 2.0
*/
public final class StaticInjectionRequest implements Element {
private final Object source;
private final Class type;
StaticInjectionRequest(Object source, Class type) {
this.source = checkNotNull(source, "source");
this.type = checkNotNull(type, "type");
}
public Object getSource() {
return source;
}
public Class getType() {
return type;
}
/**
* Returns the static methods and fields of {@code type} that will be injected to fulfill this
* request.
*
* @return a possibly empty set of injection points. The set has a specified iteration order. All
* fields are returned and then all methods. Within the fields, supertype fields are returned
* before subtype fields. Similarly, supertype methods are returned before subtype methods.
* @throws ConfigurationException if there is a malformed injection point on {@code type}, such as
* a field with multiple binding annotations. The exception's {@link
* ConfigurationException#getPartialValue() partial value} is a {@code Set}
* of the valid injection points.
*/
public Set getInjectionPoints() throws ConfigurationException {
return InjectionPoint.forStaticMethodsAndFields(type);
}
public void applyTo(Binder binder) {
binder.withSource(getSource()).requestStaticInjection(type);
}
public T acceptVisitor(ElementVisitor visitor) {
return visitor.visit(this);
}
}