Java Code Examples for java.util.stream.Stream#close()

@Transactional
public void importFromFile(Path savedFilePath) throws IOException {
    Stream<String> lines = Files.lines(savedFilePath);

    // @formatter:off
    List<DicWord> dicWordsToInsert = lines.filter(line -> !line.isEmpty())
            .flatMap(DicWordStreamParser::parse)
            .distinct()
            .collect(Collectors.toList());
    // @formatter:on

    dicWordRepository.deleteAll();
    dicWordRepository.flush();

    dicWordRepository.saveAll(dicWordsToInsert);

    lines.close();
    dicWordRepository.flush();
    logger.debug("Imported");
}
 

private List<File> getSubDirectories(final File directory, DetectorSearchFilter filter) throws DetectUserFriendlyException {
    Stream<Path> stream = null;
    try {
        stream = Files.list(directory.toPath());
        return stream.map(path -> path.toFile())
                   .filter(file -> file.isDirectory())
                   .collect(Collectors.toList());

    } catch (final IOException e) {
        throw new DetectUserFriendlyException(String.format("Could not get the subdirectories for %s. %s", directory.getAbsolutePath(), e.getMessage()), e, ExitCodeType.FAILURE_GENERAL_ERROR);
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
}
 

private Collection<String> getKeywords() {
  // SQL reserved keywords
  Stream<String> tokens = Arrays.stream(SQLLexer.tokenNames);
  Stream<String> rules = Arrays.stream(SQLLexer.ruleNames);

  List<String> keywords = Stream.concat(tokens, rules)
      .filter((str) -> str.matches("[A-Z_]+") && str.length() > 1)
      .distinct()
      .map(String::toLowerCase)
      .collect(Collectors.toList());

  // DB and table names
  for (String db: client.getAllDatabaseNames()) {
    keywords.add(db);
    keywords.addAll(client.getTableList(db));
  }

  tokens.close();
  rules.close();

  return keywords;
}
 

@Test
public void testMapJsontoBdataKey() throws Exception
{
    String fileName = "sqsMessage.txt";
    String expectedNamespace = "DMFormatNamespace1";

    Path path = Paths.get(getClass().getClassLoader().getResource(fileName).toURI());

    Stream<String> lines = Files.lines(path);
    String messageBody = lines.collect(Collectors.joining("\n")).trim();
    lines.close();

    BusinessObjectDataKey bdataKey = herdApiClientOperations.mapJsontoBdataKey(messageBody).getBusinessObjectDataKey();

    Assert.assertEquals("Did not get the correct namespace", expectedNamespace, bdataKey.getNamespace());
}
 

/**
 * All edges have id=0 - this causes an exception. Replace all zero ids and save the file
 * 
 * @param file2
 */
private void removeZeroIDFromEdge(File file) {
  try {
    logger.info("replacing zero ids in graphml");
    Path path = Paths.get(file.getAbsolutePath());
    Stream<String> lines = Files.lines(path);
    List<String> replaced =
        lines.map(line -> line.replaceAll("edge id=\"0\"", "edge")).collect(Collectors.toList());
    Files.write(path, replaced);
    lines.close();
    logger.info("zero ids in graphml replaces");
  } catch (IOException e) {
    logger.log(Level.SEVERE, "graphml NOT LOADED: " + file.getAbsolutePath(), e);
    setErrorMessage("Cannot load graphml file: " + file.getAbsolutePath());
    setStatus(TaskStatus.ERROR);
    cancel();
  }
}
 

/**
 * Loads a list of tests based on the json-encoded test vector files.
 */
@Parameters(name = "Test Vector {index}: {0}")
public static Collection<StreamTestFixture> testVectorData() throws Exception {

  final ObjectMapper objectMapper = new ObjectMapper();
  objectMapper.registerModule(new Jdk8Module());
  objectMapper.registerModule(new GuavaModule());
  objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

  Properties properties = readProperties();
  String fileName = (String) properties.get("stream.packetFixtures.fileName");

  Path path = Paths.get(StreamPacketFixturesTest.class.getClassLoader().getResource(fileName).toURI());

  Stream<String> lines = Files.lines(path);
  String data = lines.collect(Collectors.joining("\n"));
  lines.close();

  List<StreamTestFixture> vectors = objectMapper.readValue(data, new TypeReference<List<StreamTestFixture>>() {});

  return vectors;
}
 

@VisibleForTesting
String createFingerprint(final int line, final Stream<String> lines, final Charset charset) {
    String context = extractContext(line, lines.iterator());
    lines.close();
    digest.update(context.getBytes(charset));

    return asHex(digest.digest()).toUpperCase(Locale.ENGLISH);
}
 

private static List<String> getJavaFilePaths(File folder) throws IOException {
	Stream<Path> walk = Files.walk(Paths.get(folder.toURI()));
	List<String> paths = walk.map(x -> x.toString())
			.filter(f -> f.endsWith(".java"))
			.map(x -> x.substring(folder.getPath().length()+1).replaceAll(systemFileSeparator, "/"))
			.collect(Collectors.toList());
	walk.close();
	return paths;
}
 

@Test
public void relationQuadRetractionRemovesTheQuadFromTheStore() throws Exception {
  tripleStore.putQuad(EX + "subject1", "http://pred", Direction.OUT, EX + "subject1", null, null);
  tripleStore.putQuad(EX + "subject1", "http://pred", Direction.OUT, EX + "subject2", null, null);
  tripleStore.deleteQuad(EX + "subject1", "http://pred", Direction.OUT, EX + "subject2", null, null);

  Stream<CursorQuad> quads = tripleStore.getQuads(EX + "subject1", "http://pred", Direction.OUT, "");
  assertThat(quads.collect(toList()), not(hasItem(
    create(EX + "subject1", "http://pred", Direction.OUT, EX + "subject2", null, null, "http://some graph")
  )));
  quads.close();
}
 

@Test
public void getItemFromValue() throws Exception {
  final Stream<String> stream = database.databaseGetter()
    .key("ab")
    .skipToValue("bc")
    .forwards()
    .getValues(database.valueRetriever());
  final long count = stream
    .count();
  stream.close();
  assertThat(count, is(2L));
}
 

@Test
public void testDSLMapToStreamFromString() throws IOException {
	final Stream<Tuple2<String, String>> stream = CsvParser.mapTo(String.class, String.class)
			.headers("0", "1").stream("value1,value2\nvalue3");
	List<Tuple2<String, String>> list = stream.collect(Collectors.toList());

	stream.close();
	assertArrayEquals(new Object[] { new Tuple2<String, String>("value1", "value2"), new Tuple2<String, String>("value3", null)}, list.toArray());
}
 

private String toString(Stream<Book> books) {
    try {
        return books
            .map(Book::toString)
            .collect(joining("\n - ", "\n - ", ""));
    } finally {
        // We have to close the stream when finished to free the resources used by the query.
        books.close();
    }
}
 

private IFunctionHandler matchFunctionHandler(NettyHttpRequest request) throws IllegalPathNotFoundException, IllegalMethodNotAllowedException {

        AtomicBoolean matched = new AtomicBoolean(false);

        Stream<Path> stream = functionHandlerMap.keySet().stream()
                .filter(((Predicate<Path>) path -> {
                    /**
                     *过滤 Path URI 不匹配的
                     */
                    if (request.matched(path.getUri(), path.isEqual())) {
                        matched.set(true);
                        return matched.get();
                    }
                    return false;

                }).and(path -> {
                    /**
                     * 过滤 Method 匹配的
                     */
                    return request.isAllowed(path.getMethod());
                }));

        Optional<Path> optional = stream.findFirst();

        stream.close();

        if (!optional.isPresent() && !matched.get()){
            throw  new IllegalPathNotFoundException();
        }

        if (!optional.isPresent() && matched.get()){
            throw  new IllegalMethodNotAllowedException();
        }

        return functionHandlerMap.get(optional.get());
    }
 

private AsyncFuture<Void> askForOk(
    final ShellIO io, final Stream<BackendKey> keys
) {
    io
        .out()
        .println("Examples of keys that would have been deleted (use --ok to " + "perform):");

    keys.limit(100).forEach(k -> {
        io.out().println(k.toString());
    });

    keys.close();
    return async.resolved();
}
 

private static int determineNumberOfObjectives(String inputFileName) {
  Stream<String> lines ;

  try {
    lines = Files.lines(Paths.get(inputFileName), Charset.defaultCharset());
  } catch (IOException e) {
    throw new JMetalException(e) ;
  }

  int numberOfObjectives = lines.findFirst().get().split(" ").length ;
  lines.close();
  
  return numberOfObjectives;
}
 

@Test
public void getAllItems() throws Exception {
  final Stream<String> stream = database.databaseGetter()
    .getAll()
    .getValues(database.valueRetriever());
  final long count = stream
    .count();
  stream.close();
  assertThat(count, is(6L));
}
 

public void viewFileContent(String empFile) throws IOException{
Consumer<String> readStr = System.out::println;
Stream<String> content = null;
Path path = Paths.get(empFile);
  	content = Files.lines(path, Charset.defaultCharset());
  	content.map(String::toUpperCase)
  		   .forEach(readStr);
   content.close();
 }
 

@Test
public void langStringQuadRetractionQuadRemovesTheQuadFromTheStore() throws Exception {
  tripleStore.putQuad(EX + "subject1", "http://pred", Direction.OUT, "Walter", LANGSTRING, "EN-en");
  tripleStore.putQuad(EX + "subject1", "http://pred", Direction.OUT, "Gauthier", LANGSTRING, "FR-fr");
  tripleStore.deleteQuad(EX + "subject1", "http://pred", Direction.OUT, "Walter", LANGSTRING, "EN-en");

  Stream<CursorQuad> quads = tripleStore.getQuads(EX + "subject1", "http://pred", Direction.OUT, "");
  assertThat(quads.collect(toList()), not(hasItem(
    create(EX + "subject1", "http://pred", Direction.OUT, "Walter", LANGSTRING, "EN-en", "http://some graph")
  )));
  quads.close();
}
 

void run(String[] args) {
    try {
      itemCount = 0;
      // alternative to supplying args- hard code the path :-)
      if (args == null || args.length == 0) {
        d1 = Paths.get("some-explicit-coded-path/uv2-out-some-suffix");
        d2 = Paths.get("some-explicit-coded-path/uv2-out-some-other-suffix");
        d1 = Paths.get("c:/a/t/ipd2018/uv2-out-b4-2");
//        d2 = Paths.get("c:/a/t/ipd2018/uv2-out-b4");
//        d1 = Paths.get("c:/a/t/ipd2018/uv2-out-measAnnot-fsiter-2c-getSurroundSent");
        d2 = Paths.get("c:/a/t/ipd2018/uv2-out-measAnnot-fsiter-2d-getSurroundSent-partial");
        
        d1 = Paths.get("c:/a/t/ipd2018/uv2-out-b4");
        d1 = Paths.get("c:/a/t/ipd2018/uv2-out-jp-merge-outer");
        d2 = Paths.get("c:/a/t/ipd2018/uv2-out-jp-merge");

        
//        skip = 725;  // optional skip amount
      } else {
        d1 = Paths.get(args[0]);
        d2 = Paths.get(args[1]);
        skip = Integer.parseInt(args[2]);
      }
      d1String = d1.toString();
      d2String = d2.toString();

      boolean d1v2 = d1String.contains("uv2-out");
      boolean d2v2 = d2String.contains("uv2-out");
      boolean d1v3 = d1String.contains("uv3-out");
      boolean d2v3 = d2String.contains("uv3-out");
      
      isV2V2 = d1v2 && d2v2;
      isV3V3 = d1v3 && d2v3;
      isV2V3 = (d1v2 && d2v3) || (d1v3 && d2v2);
      
      System.out.println("Comparing " + d1String + " to " + d2String);
      
      if (isV2V2) System.out.println("\napplying fixups for v2 versus v2 comparison");
      if (isV2V3) System.out.println("\napplying fixups for v2 versus v3 comparison");
      if (isV3V3) System.out.println("\napplying fixups for v3 versus v3 comparison");

      // read the type system descriptor
      File typeSystemFile = Paths.get(d2String, "CAS_typeSystem_desc.xml").toFile();
      TypeSystemDescription typeSystemDescription = UIMAFramework.getXMLParser().parseTypeSystemDescription(
          new XMLInputSource(typeSystemFile));
      
      c1 = (CASImpl) CasCreationUtils.createCas(typeSystemDescription, null, null);
      c2 = (CASImpl) CasCreationUtils.createCas(typeSystemDescription, null, null);
      
      Stream<Path> pathStream = Files.walk(d1, FileVisitOption.FOLLOW_LINKS);      
      pathStream.forEach(p1 -> maybeCompare(p1));
      pathStream.close();
      
    } catch (ResourceInitializationException | InvalidXMLException | IOException e) {
      throw new RuntimeException(e);
    }
  }
 

/**
 * Returns the <b>full</b> data set content for given id.
 *
 * @param metadata If <code>true</code>, includes data set metadata information.
 * @param dataSetId A data set id.
 * @return The full data set.
 */
@RequestMapping(value = "/datasets/{id}/content", method = RequestMethod.GET)
@ApiOperation(value = "Get a data set by id",
        notes = "Get a data set content based on provided id. Id should be a UUID returned by the list operation. Not valid or non existing data set id returns empty content.")
@Timed
@ResponseBody
public Callable<DataSet> get(
        @RequestParam(defaultValue = "true") @ApiParam(name = "metadata",
                value = "Include metadata information in the response") boolean metadata, //
        @RequestParam(defaultValue = "false") @ApiParam(name = "includeInternalContent",
                value = "Include internal content in the response") boolean includeInternalContent, //
        @RequestParam(defaultValue = "-1") @ApiParam(name = STORAGE_LIMIT, value = STORAGE_LIMIT) long limit, //
        @ApiParam(value = "Filter for retrieved content.") @RequestParam(value = "filter",
                defaultValue = "") String filter,
        @PathVariable(value = "id") @ApiParam(name = "id",
                value = "Id of the requested data set") String dataSetId) {
    return () -> {
        final Marker marker = Markers.dataset(dataSetId);
        LOG.debug(marker, "Get data set #{}", dataSetId);
        Stream<DataSetRow> stream = null;
        try {
            DataSetMetadata dataSetMetadata = dataSetMetadataRepository.get(dataSetId);
            assertDataSetMetadata(dataSetMetadata, dataSetId);
            // Build the result
            DataSet dataSet = new DataSet();
            if (metadata) {
                dataSet.setMetadata(conversionService.convert(dataSetMetadata, UserDataSetMetadata.class));
            }
            stream = contentStore.stream(dataSetMetadata, limit); // Disable line limit

            // on-demand analyzer for dataset (See TDP-4404, migration problems)
            if (dataSetMetadata.getRowMetadata().getColumns().stream().anyMatch(
                    c -> c.getStatistics().getWordPatternFrequencyTable().isEmpty())) {
                stream = insertWordPatternAnalysis(dataSetMetadata, stream);
            }

            if (!includeInternalContent) {
                LOG.debug("Skip internal content when serving data set #{} content.", dataSetId);
                stream = stream.map(r -> {
                    final Map<String, Object> values = r.values();
                    final Map<String, Object> filteredValues = new HashMap<>(values);
                    // Remove technical properties from returned values.
                    values.forEach((k, v) -> {
                        if (k != null && k.startsWith(FlagNames.INTERNAL_PROPERTY_PREFIX)) {
                            filteredValues.remove(k);
                        }
                    });
                    filteredValues.put(FlagNames.TDP_ID, r.getTdpId()); // Include TDP_ID anyway
                    return new DataSetRow(r.getRowMetadata(), filteredValues);
                });
            }

            // Filter content
            stream = stream.filter(filterService.build(filter, dataSetMetadata.getRowMetadata()));

            dataSet.setRecords(stream);
            return dataSet;
        } catch (Exception e) {
            if (stream != null) {
                stream.close();
            }
            throw e;
        } finally {
            LOG.debug(marker, "Get done.");
        }
    };
}