home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (InjectionRequest.java)

This example Java source code file (InjectionRequest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

configurationexception, element, injectionrequest, object, set, typeliteral, util

The InjectionRequest.java Java example source code

/**
 * 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 com.google.inject.TypeLiteral;

import java.util.Set;

/**
 * A request to inject the instance fields and methods of an instance. Requests are created
 * explicitly in a module using {@link com.google.inject.Binder#requestInjection(Object)
 * requestInjection()} statements:
 * <pre>
 *     requestInjection(serviceInstance);</pre>
 *
 * @author mikeward@google.com (Mike Ward)
 * @since 2.0
 */
public final class InjectionRequest<T> implements Element {

  private final Object source;
  private final TypeLiteral<T> type;
  private final T instance;

  public InjectionRequest(Object source, TypeLiteral<T> type, T instance) {
    this.source = checkNotNull(source, "source");
    this.type = checkNotNull(type, "type");
    this.instance = checkNotNull(instance, "instance");
  }

  public Object getSource() {
    return source;
  }

  public T getInstance() {
    return instance;
  }

  public TypeLiteral<T> getType() {
    return type;
  }

  /**
   * Returns the instance methods and fields of {@code instance} 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 the class of {@code
   *      instance}, 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.forInstanceMethodsAndFields(instance.getClass());
  }

  public <R> R acceptVisitor(ElementVisitor visitor) {
    return visitor.visit(this);
  }

  public void applyTo(Binder binder) {
    binder.withSource(getSource()).requestInjection(type, instance);
  }
}

Other Java examples (source code examples)

Here is a short list of links related to this Java InjectionRequest.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.