| /** |
| * 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.spi; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import com.google.common.collect.ImmutableList; |
| import com.google.inject.internal.Errors; |
| import com.google.inject.internal.SourceProvider; |
| import java.io.Serializable; |
| import java.util.List; |
| |
| /** |
| * An error message and the context in which it occured. Messages are usually created internally by |
| * Guice and its extensions. Messages can be created explicitly in a module using {@link |
| * com.google.inject.Binder#addError(Throwable) addError()} statements: |
| * <pre> |
| * try { |
| * bindPropertiesFromFile(); |
| * } catch (IOException e) { |
| * addError(e); |
| * }</pre> |
| * |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public final class Message implements Serializable, Element { |
| private final String source; |
| private final String message; |
| private final List<InjectionPoint> injectionPoints; |
| private final Throwable cause; |
| |
| public Message(Object source, String message, List<InjectionPoint> injectionPoints, |
| Throwable cause) { |
| this.source = Errors.convert(checkNotNull(source, "source")).toString(); |
| this.message = checkNotNull(message, "message"); |
| this.injectionPoints = ImmutableList.copyOf(injectionPoints); |
| this.cause = cause; |
| } |
| |
| public Message(Object source, Throwable throwable) { |
| this(source, "An exception was caught and reported. Message: " + throwable.getMessage(), |
| ImmutableList.<InjectionPoint>of(), throwable); |
| } |
| |
| public Message(Object source, String message) { |
| this(source, message, ImmutableList.<InjectionPoint>of(), null); |
| } |
| |
| public Message(String message) { |
| this(SourceProvider.UNKNOWN_SOURCE, message, ImmutableList.<InjectionPoint>of(), null); |
| } |
| |
| public String getSource() { |
| return source; |
| } |
| |
| /** |
| * Gets the error message text. |
| */ |
| public String getMessage() { |
| return message; |
| } |
| |
| public List<InjectionPoint> getInjectionPoints() { |
| return injectionPoints; |
| } |
| |
| public <T> T acceptVisitor(ElementVisitor<T> visitor) { |
| return visitor.visitMessage(this); |
| } |
| |
| /** |
| * Returns the throwable that caused this message, or {@code null} if this |
| * message was not caused by a throwable. |
| */ |
| public Throwable getCause() { |
| return cause; |
| } |
| |
| @Override public String toString() { |
| return source + " " + message; |
| } |
| |
| @Override public int hashCode() { |
| return source.hashCode() * 31 + message.hashCode(); |
| } |
| |
| @Override public boolean equals(Object o) { |
| if (!(o instanceof Message)) { |
| return false; |
| } |
| Message e = (Message) o; |
| return source.equals(e.source) && message.equals(e.message); |
| } |
| } |