001    /*
002     * Copyright 2010-2015 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.kotlin.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    public class GroupingMessageCollector implements MessageCollector {
024    
025        private final MessageCollector delegate;
026    
027        // File path (nullable) -> message
028        private final Multimap<String, Message> groupedMessages = LinkedHashMultimap.create();
029    
030        public GroupingMessageCollector(@NotNull MessageCollector delegate) {
031            this.delegate = delegate;
032        }
033    
034        @Override
035        public void report(
036                @NotNull CompilerMessageSeverity severity,
037                @NotNull String message,
038                @NotNull CompilerMessageLocation location
039        ) {
040            if (CompilerMessageSeverity.VERBOSE.contains(severity)) {
041                delegate.report(severity, message, location);
042            }
043            else {
044                groupedMessages.put(location.getPath(), new Message(severity, message, location));
045            }
046        }
047    
048        public void flush() {
049            boolean hasError = false;
050    
051            for (String path : groupedMessages.keySet()) {
052                for (Message message : groupedMessages.get(path)) {
053                    hasError |= CompilerMessageSeverity.ERRORS.contains(message.severity);
054                }
055            }
056    
057            for (String path : groupedMessages.keySet()) {
058                for (Message message : groupedMessages.get(path)) {
059                    if (!hasError || CompilerMessageSeverity.ERRORS.contains(message.severity)) {
060                        delegate.report(message.severity, message.message, message.location);
061                    }
062                }
063            }
064    
065            groupedMessages.clear();
066        }
067    
068        private static class Message {
069            private final CompilerMessageSeverity severity;
070            private final String message;
071            private final CompilerMessageLocation location;
072    
073            private Message(@NotNull CompilerMessageSeverity severity, @NotNull String message, @NotNull CompilerMessageLocation location) {
074                this.severity = severity;
075                this.message = message;
076                this.location = location;
077            }
078    
079            @Override
080            public boolean equals(Object o) {
081                if (this == o) return true;
082                if (o == null || getClass() != o.getClass()) return false;
083    
084                Message message1 = (Message) o;
085    
086                if (!location.equals(message1.location)) return false;
087                if (!message.equals(message1.message)) return false;
088                if (severity != message1.severity) return false;
089    
090                return true;
091            }
092    
093            @Override
094            public int hashCode() {
095                int result = severity.hashCode();
096                result = 31 * result + message.hashCode();
097                result = 31 * result + location.hashCode();
098                return result;
099            }
100        }
101    }