constantfactory.java

来自「Guice是轻量级的依赖注入框架。简而言之」· Java 代码 · 共 43 行

/**
 * 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;

import com.google.inject.util.Objects;
import com.google.inject.util.ToStringBuilder;

/**
 * @author [e-mail] (Bob Lee)
 */
class ConstantFactory<T> implements InternalFactory<T> {

  private final T value;

  public ConstantFactory(T value) {
    this.value = Objects.nonNull(value, "value");
  }

  public T get(InternalContext ignored) {
    return value;
  }

  public String toString() {
    return new ToStringBuilder(ConstantFactory.class)
        .add("value", value)
        .toString();
  }
}