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/*
* 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 static com.google.common.base.Preconditions.checkNotNull;
import com.google.inject.Binder;
import com.google.inject.ConfigurationException;
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:
*
* <pre>
* requestStaticInjection(MyLegacyService.class);</pre>
*
* @author jessewilson@google.com (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");
}
@Override
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<InjectionPoint>} of
* the valid injection points.
*/
public Set<InjectionPoint> getInjectionPoints() throws ConfigurationException {
return InjectionPoint.forStaticMethodsAndFields(type);
}
@Override
public void applyTo(Binder binder) {
binder.withSource(getSource()).requestStaticInjection(type);
}
@Override
public <T> T acceptVisitor(ElementVisitor<T> visitor) {
return visitor.visit(this);
}
}
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