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      1 /*
      2  * Copyright (C) 2010 Google Inc.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.inject.internal;
     18 
     19 import static com.google.common.base.Preconditions.checkNotNull;
     20 import static com.google.common.base.Preconditions.checkState;
     21 
     22 import com.google.inject.Stage;
     23 import com.google.inject.internal.InjectorImpl.InjectorOptions;
     24 import com.google.inject.spi.DisableCircularProxiesOption;
     25 import com.google.inject.spi.RequireAtInjectOnConstructorsOption;
     26 import com.google.inject.spi.RequireExactBindingAnnotationsOption;
     27 import com.google.inject.spi.RequireExplicitBindingsOption;
     28 
     29 /**
     30  * A processor to gather injector options.
     31  *
     32  * @author sameb (at) google.com (Sam Berlin)
     33  */
     34 class InjectorOptionsProcessor extends AbstractProcessor {
     35 
     36   private boolean disableCircularProxies = false;
     37   private boolean jitDisabled = false;
     38   private boolean atInjectRequired = false;
     39   private boolean exactBindingAnnotationsRequired = false;
     40 
     41   InjectorOptionsProcessor(Errors errors) {
     42     super(errors);
     43   }
     44 
     45   @Override
     46   public Boolean visit(DisableCircularProxiesOption option) {
     47     disableCircularProxies = true;
     48     return true;
     49   }
     50 
     51   @Override
     52   public Boolean visit(RequireExplicitBindingsOption option) {
     53     jitDisabled = true;
     54     return true;
     55   }
     56 
     57   @Override
     58   public Boolean visit(RequireAtInjectOnConstructorsOption option) {
     59     atInjectRequired = true;
     60     return true;
     61   }
     62 
     63   @Override
     64   public Boolean visit(RequireExactBindingAnnotationsOption option) {
     65     exactBindingAnnotationsRequired = true;
     66     return true;
     67   }
     68 
     69   InjectorOptions getOptions(Stage stage, InjectorOptions parentOptions) {
     70     checkNotNull(stage, "stage must be set");
     71     if(parentOptions == null) {
     72       return new InjectorOptions(
     73           stage,
     74           jitDisabled,
     75           disableCircularProxies,
     76           atInjectRequired,
     77           exactBindingAnnotationsRequired);
     78     } else {
     79       checkState(stage == parentOptions.stage, "child & parent stage don't match");
     80       return new InjectorOptions(
     81           stage,
     82           jitDisabled || parentOptions.jitDisabled,
     83           disableCircularProxies || parentOptions.disableCircularProxies,
     84           atInjectRequired || parentOptions.atInjectRequired,
     85           exactBindingAnnotationsRequired || parentOptions.exactBindingAnnotationsRequired);
     86     }
     87   }
     88 
     89 }
     90