001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.cli.common.messages;
018    
019    import com.google.common.collect.LinkedHashMultimap;
020    import com.google.common.collect.Multimap;
021    import org.jetbrains.annotations.NotNull;
022    
023    import java.util.Collection;
024    
025    public class GroupingMessageCollector implements MessageCollector {
026    
027        private final MessageCollector delegate;
028    
029        // File path (nullable) -> message
030        private final Multimap<String, Message> groupedMessages = LinkedHashMultimap.create();
031    
032        public GroupingMessageCollector(@NotNull MessageCollector delegate) {
033            this.delegate = delegate;
034        }
035    
036        @Override
037        public void report(
038                @NotNull CompilerMessageSeverity severity,
039                @NotNull String message,
040                @NotNull CompilerMessageLocation location
041        ) {
042            if (CompilerMessageSeverity.VERBOSE.contains(severity)) {
043                delegate.report(severity, message, location);
044            }
045            else {
046                groupedMessages.put(location.getPath(), new Message(severity, message, location));
047            }
048        }
049    
050        public void flush() {
051            for (String path : groupedMessages.keySet()) {
052                Collection<Message> messages = groupedMessages.get(path);
053                for (Message message : messages) {
054                    delegate.report(message.severity, message.message, message.location);
055                }
056            }
057            groupedMessages.clear();
058        }
059    
060        private static class Message {
061            private final CompilerMessageSeverity severity;
062            private final String message;
063            private final CompilerMessageLocation location;
064    
065            private Message(@NotNull CompilerMessageSeverity severity, @NotNull String message, @NotNull CompilerMessageLocation location) {
066                this.severity = severity;
067                this.message = message;
068                this.location = location;
069            }
070    
071            @Override
072            public boolean equals(Object o) {
073                if (this == o) return true;
074                if (o == null || getClass() != o.getClass()) return false;
075    
076                Message message1 = (Message) o;
077    
078                if (!location.equals(message1.location)) return false;
079                if (!message.equals(message1.message)) return false;
080                if (severity != message1.severity) return false;
081    
082                return true;
083            }
084    
085            @Override
086            public int hashCode() {
087                int result = severity.hashCode();
088                result = 31 * result + message.hashCode();
089                result = 31 * result + location.hashCode();
090                return result;
091            }
092        }
093    }