com.google.inject.internal.InternalFactoryToProviderAdapter Maven / Gradle / Ivy
/*
* Copyright (C) 2006 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.internal;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.inject.Provider;
import com.google.inject.spi.Dependency;
/** @author [email protected] (Bob Lee) */
final class InternalFactoryToProviderAdapter implements InternalFactory {
private final Provider provider;
private final Object source;
public InternalFactoryToProviderAdapter(Provider provider, Object source) {
this.provider = checkNotNull(provider, "provider");
this.source = checkNotNull(source, "source");
}
@Override
public T get(InternalContext context, Dependency dependency, boolean linked)
throws InternalProvisionException {
// Set the dependency here so it is available to scope implementations (such as SingletonScope)
// The reason we need this is so that Scope implementations (and scope delegate providers) can
// create proxies of super-interfaces to support cyclic dependencies. It would be nice to
// drop the setDependency method (and field), but that could only happen if cyclic proxies
// were also dropped.
context.setDependency(dependency);
try {
T t = provider.get();
if (t == null && !dependency.isNullable()) {
InternalProvisionException.onNullInjectedIntoNonNullableDependency(source, dependency);
}
return t;
} catch (RuntimeException userException) {
throw InternalProvisionException.errorInProvider(userException).addSource(source);
}
}
@Override
public String toString() {
return provider.toString();
}
}