1 /*
2  * Copyright 2017 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  *     https://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 trebuchet.task
18 
19 import trebuchet.extractors.ExtractorRegistry
20 import trebuchet.importers.ImportFeedback
21 import trebuchet.importers.ImporterRegistry
22 import trebuchet.io.BufferProducer
23 import trebuchet.io.StreamingReader
24 import trebuchet.model.Model
25 import trebuchet.model.fragments.ModelFragment
26 import kotlin.system.measureTimeMillis
27 
28 class ImportTask(private val importFeedback: ImportFeedback) {
29     private val fragments = mutableListOf<ModelFragment>()
30 
31     // TODO: Java doesn't like this since it collides with the
32     @JvmName("importTrace")
importnull33     fun import(source: BufferProducer): Model {
34         extractOrImport(source)
35         return finish()
36     }
37 
extractOrImportnull38     private fun extractOrImport(stream: BufferProducer) {
39         try {
40             val reader = StreamingReader(stream)
41             reader.loadIndex(reader.keepLoadedSize.toLong())
42             val extractor = ExtractorRegistry.extractorFor(reader, importFeedback)
43             if (extractor != null) {
44                 extractor.extract(reader, this::extractOrImport)
45             } else {
46                 addImporterSource(reader)
47             }
48         } catch (ex: Throwable) {
49             importFeedback.reportImportException(ex)
50         } finally {
51             stream.close()
52         }
53     }
54 
addImporterSourcenull55     private fun addImporterSource(reader: StreamingReader) {
56         val importer = ImporterRegistry.importerFor(reader, importFeedback)
57         if (importer != null) {
58             val result = importer.import(reader)
59             if (result != null) {
60                 fragments.add(result)
61             }
62         }
63     }
64 
finishnull65     private fun finish(): Model {
66         val model = Model(fragments)
67         fragments.clear()
68         return model
69     }
70 }