com.google.inject.spi.DefaultBindingTargetVisitor 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.Binding;
/**
* No-op visitor for subclassing. All interface methods simply delegate to {@link
* #visitOther(Binding)}, returning its result.
*
* @param any type to be returned by the visit method. Use {@link Void} with {@code return null}
* if no return type is needed.
* @author [email protected] (Jesse Wilson)
* @since 2.0
*/
public abstract class DefaultBindingTargetVisitor implements BindingTargetVisitor {
/** Default visit implementation. Returns {@code null}. */
protected V visitOther(Binding binding) {
return null;
}
@Override
public V visit(InstanceBinding instanceBinding) {
return visitOther(instanceBinding);
}
@Override
public V visit(ProviderInstanceBinding providerInstanceBinding) {
return visitOther(providerInstanceBinding);
}
@Override
public V visit(ProviderKeyBinding providerKeyBinding) {
return visitOther(providerKeyBinding);
}
@Override
public V visit(LinkedKeyBinding linkedKeyBinding) {
return visitOther(linkedKeyBinding);
}
@Override
public V visit(ExposedBinding exposedBinding) {
return visitOther(exposedBinding);
}
@Override
public V visit(UntargettedBinding untargettedBinding) {
return visitOther(untargettedBinding);
}
@Override
public V visit(ConstructorBinding constructorBinding) {
return visitOther(constructorBinding);
}
@Override
public V visit(ConvertedConstantBinding convertedConstantBinding) {
return visitOther(convertedConstantBinding);
}
@Override
@SuppressWarnings("unchecked")
public V visit(ProviderBinding providerBinding) {
// TODO(cushon): remove raw (Binding) cast when we don't care about javac 6 anymore
return visitOther((Binding) (Binding) providerBinding);
}
}