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/*
* 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 org.elasticsearch.common.inject.internal;
import org.elasticsearch.common.inject.Binding;
import org.elasticsearch.common.inject.Injector;
import org.elasticsearch.common.inject.Key;
import org.elasticsearch.common.inject.Provider;
import org.elasticsearch.common.inject.spi.BindingScopingVisitor;
import org.elasticsearch.common.inject.spi.ElementVisitor;
import org.elasticsearch.common.inject.spi.InstanceBinding;
/**
* @author [email protected] (Bob Lee)
*/
public abstract class BindingImpl implements Binding {
private final Injector injector;
private final Key key;
private final Object source;
private final Scoping scoping;
private final InternalFactory internalFactory;
public BindingImpl(Injector injector, Key key, Object source,
InternalFactory internalFactory, Scoping scoping) {
this.injector = injector;
this.key = key;
this.source = source;
this.internalFactory = internalFactory;
this.scoping = scoping;
}
protected BindingImpl(Object source, Key key, Scoping scoping) {
this.internalFactory = null;
this.injector = null;
this.source = source;
this.key = key;
this.scoping = scoping;
}
@Override
public Key getKey() {
return key;
}
@Override
public Object getSource() {
return source;
}
private volatile Provider provider;
@Override
public Provider getProvider() {
if (provider == null) {
if (injector == null) {
throw new UnsupportedOperationException("getProvider() not supported for module bindings");
}
provider = injector.getProvider(key);
}
return provider;
}
public InternalFactory getInternalFactory() {
return internalFactory;
}
public Scoping getScoping() {
return scoping;
}
/**
* Is this a constant binding? This returns true for constant bindings as
* well as toInstance() bindings.
*/
public boolean isConstant() {
return this instanceof InstanceBinding;
}
@Override
public V acceptVisitor(ElementVisitor visitor) {
return visitor.visit(this);
}
@Override
public V acceptScopingVisitor(BindingScopingVisitor visitor) {
return scoping.acceptVisitor(visitor);
}
protected BindingImpl withScoping(Scoping scoping) {
throw new AssertionError();
}
protected BindingImpl withKey(Key key) {
throw new AssertionError();
}
@Override
public String toString() {
return new ToStringBuilder(Binding.class)
.add("key", key)
.add("scope", scoping)
.add("source", source)
.toString();
}
public Injector getInjector() {
return injector;
}
}