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1 /**
2  * Copyright (C) 2006 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;
18 
19 import static com.google.common.base.Preconditions.checkArgument;
20 
21 import com.google.common.collect.ImmutableSet;
22 import com.google.inject.internal.Errors;
23 import com.google.inject.spi.Message;
24 
25 import java.util.Collection;
26 
27 /**
28  * Thrown when errors occur while creating a {@link Injector}. Includes a list of encountered
29  * errors. Clients should catch this exception, log it, and stop execution.
30  *
31  * @author crazybob@google.com (Bob Lee)
32  */
33 public class CreationException extends RuntimeException {
34 
35   private final ImmutableSet<Message> messages;
36 
37   /** Creates a CreationException containing {@code messages}. */
CreationException(Collection<Message> messages)38   public CreationException(Collection<Message> messages) {
39     this.messages = ImmutableSet.copyOf(messages);
40     checkArgument(!this.messages.isEmpty());
41     initCause(Errors.getOnlyCause(this.messages));
42   }
43 
44   /** Returns messages for the errors that caused this exception. */
getErrorMessages()45   public Collection<Message> getErrorMessages() {
46     return messages;
47   }
48 
getMessage()49   @Override public String getMessage() {
50     return Errors.format("Unable to create injector, see the following errors", messages);
51   }
52 
53   private static final long serialVersionUID = 0;
54 }
55