| /* |
| * Copyright (C) 2007 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; |
| |
| import com.google.inject.Key.AnnotationStrategy; |
| import com.google.inject.binder.AnnotatedConstantBindingBuilder; |
| import com.google.inject.binder.ConstantBindingBuilder; |
| import com.google.inject.internal.Annotations; |
| import com.google.inject.internal.Objects; |
| import com.google.inject.internal.StackTraceElements; |
| import com.google.inject.internal.ToStringBuilder; |
| import com.google.inject.spi.BindingVisitor; |
| import com.google.inject.spi.ConstantBinding; |
| import com.google.inject.util.Providers; |
| import java.lang.annotation.Annotation; |
| |
| /** |
| * Builds a constant binding. |
| */ |
| class ConstantBindingBuilderImpl implements AnnotatedConstantBindingBuilder, |
| ConstantBindingBuilder { |
| |
| BindingInfo<?> bindingInfo; |
| AnnotationStrategy annotationStrategy; |
| final Object source; |
| private BinderImpl binder; |
| |
| ConstantBindingBuilderImpl(BinderImpl binder, Object source) { |
| this.binder = binder; |
| this.source = source; |
| } |
| |
| public ConstantBindingBuilder annotatedWith( |
| Class<? extends Annotation> annotationType) { |
| Objects.nonNull(annotationType, "annotation type"); |
| validateAnnotation(annotationType); |
| annotationStrategy = Key.strategyFor(annotationType); |
| return this; |
| } |
| |
| public ConstantBindingBuilder annotatedWith(Annotation annotation) { |
| Objects.nonNull(annotation, "annotation"); |
| validateAnnotation(annotation.annotationType()); |
| annotationStrategy = Key.strategyFor(annotation); |
| return this; |
| } |
| |
| void validateAnnotation(Class<? extends Annotation> annotationType) { |
| if (annotationStrategy != null) { |
| binder.addError(source, ErrorMessages.ANNOTATION_ALREADY_SPECIFIED); |
| return; |
| } |
| |
| boolean retainedAtRuntime = |
| Annotations.isRetainedAtRuntime(annotationType); |
| boolean bindingAnnotation = Key.isBindingAnnotation(annotationType); |
| |
| if (!retainedAtRuntime) { |
| binder.addError(StackTraceElements.forType(annotationType), |
| ErrorMessages.MISSING_RUNTIME_RETENTION, source); |
| } |
| |
| if (!bindingAnnotation) { |
| binder.addError(StackTraceElements.forType(annotationType), |
| ErrorMessages.MISSING_BINDING_ANNOTATION, source); |
| } |
| } |
| |
| boolean hasValue() { |
| return bindingInfo != null; |
| } |
| |
| Object getSource() { |
| return source; |
| } |
| |
| public void to(String value) { |
| to(String.class, value); |
| } |
| |
| public void to(int value) { |
| to(int.class, value); |
| } |
| |
| public void to(long value) { |
| to(long.class, value); |
| } |
| |
| public void to(boolean value) { |
| to(boolean.class, value); |
| } |
| |
| public void to(double value) { |
| to(double.class, value); |
| } |
| |
| public void to(float value) { |
| to(float.class, value); |
| } |
| |
| public void to(short value) { |
| to(short.class, value); |
| } |
| |
| public void to(char value) { |
| to(char.class, value); |
| } |
| |
| public void to(Class<?> value) { |
| to(Class.class, value); |
| } |
| |
| public <E extends Enum<E>> void to(E value) { |
| to(value.getDeclaringClass(), value); |
| } |
| |
| /** |
| * Maps a constant value to the given type and name. |
| */ |
| <T> void to(final Class<T> type, final T value) { |
| if (this.bindingInfo != null) { |
| binder.addError(source, ErrorMessages.CONSTANT_VALUE_ALREADY_SET); |
| } else { |
| this.bindingInfo |
| = new BindingInfo<T>(type, value, annotationStrategy, source); |
| } |
| } |
| |
| BindingImpl<?> createBinding(InjectorImpl injector) { |
| return bindingInfo.createBinding(injector); |
| } |
| |
| private static class BindingInfo<T> { |
| |
| final Class<T> type; |
| final T value; |
| final AnnotationStrategy annotationStrategy; |
| final Object source; |
| |
| BindingInfo(Class<T> type, T value, |
| AnnotationStrategy annotationStrategy, Object source) { |
| this.type = type; |
| this.value = value; |
| this.annotationStrategy = annotationStrategy; |
| this.source = source; |
| } |
| |
| BindingImpl<T> createBinding(InjectorImpl injector) { |
| Key<T> key = Key.get(type, annotationStrategy); |
| ConstantFactory<T> factory = new ConstantFactory<T>(value); |
| return new ContantBindingImpl<T>(injector, key, source, factory, value); |
| } |
| } |
| |
| private static class ContantBindingImpl<T> extends BindingImpl<T> |
| implements ConstantBinding<T> { |
| |
| final T value; |
| final Provider<T> provider; |
| |
| ContantBindingImpl(InjectorImpl injector, Key<T> key, Object source, |
| InternalFactory<T> internalFactory, T value) { |
| super(injector, key, source, internalFactory, Scopes.NO_SCOPE); |
| this.value = value; |
| this.provider = Providers.of(value); |
| } |
| |
| @Override |
| public Provider<T> getProvider() { |
| return this.provider; |
| } |
| |
| public void accept(BindingVisitor<? super T> bindingVisitor) { |
| bindingVisitor.visit(this); |
| } |
| |
| public T getValue() { |
| return this.value; |
| } |
| |
| @Override |
| public String toString() { |
| return new ToStringBuilder(ConstantBinding.class) |
| .add("key", key) |
| .add("value", value) |
| .add("source", source) |
| .toString(); |
| } |
| } |
| } |