import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@SuppressWarnings("resource")
public void testSimpleDocWithMinimal() throws Exception
{
    StringWriter sw = new StringWriter();
    JsonGenerator gen = new JsonFactory().createGenerator(ObjectWriteContext.empty(), sw);
    // first with standard minimal
    gen.setPrettyPrinter(new MinimalPrettyPrinter());
    String docStr = _verifyPrettyPrinter(gen, sw);
    // which should have no linefeeds, tabs
    assertEquals(-1, docStr.indexOf('\n'));
    assertEquals(-1, docStr.indexOf('\t'));

    // And then with slightly customized variant
    gen = new JsonFactory().createGenerator(ObjectWriteContext.empty(), sw);
    gen.setPrettyPrinter(new MinimalPrettyPrinter() {
        @Override
        // use TAB between array values
        public void beforeArrayValues(JsonGenerator jg) throws IOException, JsonGenerationException
        {
            jg.writeRaw("\t");
        }
    });
    docStr = _verifyPrettyPrinter(gen, sw);
    assertEquals(-1, docStr.indexOf('\n'));
    assertTrue(docStr.indexOf('\t') >= 0);
    gen.close();
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
public void testCustomSeparatorsWithMinimal() throws Exception
{
    StringWriter sw = new StringWriter();
    JsonGenerator gen = new JsonFactory().createGenerator(ObjectWriteContext.empty(), sw);
    gen.setPrettyPrinter(new MinimalPrettyPrinter().setSeparators(Separators.createDefaultInstance()
            .withObjectFieldValueSeparator('=')
            .withObjectEntrySeparator(';')
            .withArrayValueSeparator('|')));
    _writeTestDocument(gen);
    gen.close();
    assertEquals("[3|\"abc\"|[true]|{\"f\"=null;\"f2\"=null}]", sw.toString());
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@Override
public void to(final Writer out, final T object) {
    try (StringWriter writer = new StringWriter()) {
        this.objectMapper.writer(this.prettyPrinter).writeValue(writer, object);

        if (isJsonFormat()) {
            final Stringify opt = this.prettyPrinter instanceof MinimalPrettyPrinter ? Stringify.FORMATTED : Stringify.FORMATTED;
            JsonValue.readHjson(writer.toString()).writeTo(out, opt);
        } else {
            IOUtils.write(writer.toString(), out);
        }
    } catch (final Exception e) {
        throw new IllegalArgumentException(e);
    }
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@Override
public void startPartition(WritePartition partition) throws Exception {
  // close previous partition if open.
  if(this.partition != null){
    close();
  }
  this.partition = partition;

  try {
    this.fileName = fs.canonicalizePath(partition.qualified(location, prefix + "_0." + extension));
    stream = fs.create(fileName);
    JsonGenerator generator = factory.createGenerator(stream).useDefaultPrettyPrinter();
    if (uglify) {
      generator = generator.setPrettyPrinter(new MinimalPrettyPrinter(LINE_FEED));
    }
    if(useExtendedOutput){
      gen = new ExtendedJsonOutput(generator);
    }else{
      gen = new BasicJsonOutput(generator);
    }
    logger.debug("Created file: {}", fileName);
  } catch (IOException ex) {
    throw UserException.dataWriteError(ex)
      .message("Failure writing JSON file %s.", fileName)
      .build(logger);
  }

}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
/**
 * Instantiates a new Bean object json serializer.
 */
public BeanObjectJsonSerializer() {
    super(new MinimalPrettyPrinter());
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@Nullable
private String initStructure(CanvasSessionData data, SelectionSession session, SingleSignonForm form)
{
	final String courseId = data.getCourseId();
	String structure = form.getStructure();
	if( structure == null )
	{
		// if course ID is empty then there is nothing we can do...
		if( Strings.isNullOrEmpty(courseId) )
		{
			throw new RuntimeException(LABEL_ERROR_NO_COURSE.getText());
		}
		structure = courseStructureCache.get(courseId).orNull();
	}
	// if no structure, get from Canvas
	if( structure == null )
	{
		final ObjectNode root = objectMapper.createObjectNode();
		root.put("id", courseId);
		root.put("name", data.getContextTitle());
		root.put("targetable", false);
		final ArrayNode foldersNode = objectMapper.createArrayNode();
		root.put("folders", foldersNode);

		final Connector connector = findConnector(data);
		final List<ConnectorFolder> folders = connectorRepoService.getFoldersForCourse(connector,
			CurrentUser.getUsername(), courseId, false);
		boolean first = true;
		for( ConnectorFolder folder : folders )
		{
			final ObjectNode folderNode = objectMapper.createObjectNode();
			folderNode.put("id", folder.getId());
			folderNode.put("name", folder.getName());
			folderNode.put("targetable", true);
			folderNode.put("defaultFolder", first);
			foldersNode.add(folderNode);
			first = false;
		}

		final PrettyPrinter pp = new MinimalPrettyPrinter();
		try
		{
			structure = objectMapper.writer().with(pp).writeValueAsString(root);
		}
		catch( JsonProcessingException e )
		{
			throw Throwables.propagate(e);
		}
	}
	if( structure != null )
	{
		courseStructureCache.put(courseId, structure);
	}
	return structure;
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
private String getStructure(String courseId, String connectorUuid, String selected)
{
	try
	{
		final boolean isDefaultApplicable = !Strings.isNullOrEmpty(selected);
		final String cacheKey = connectorUuid + ":" + courseId + (!isDefaultApplicable ? "" : ":" + selected);
		String structure = courseStructureCache.get(cacheKey).orNull();

		// if no structure, get from Brightspace
		if( structure == null )
		{
			final Connector connector = connectorService.getByUuid(connectorUuid);
			if( connector == null )
			{
				throw new RuntimeException("No connector with UUID = " + connectorUuid);
			}

			final ConnectorCourse course = brightspaceService.getCourse(connector, courseId);

			final ObjectNode root = objectMapper.createObjectNode();
			root.put("id", courseId);
			root.put("name", course.getName());
			root.put("targetable", false);
			final ArrayNode foldersNode = objectMapper.createArrayNode();
			root.put("folders", foldersNode);

			final List<ConnectorFolder> folders = brightspaceService.getFoldersForCourse(connector, null, courseId,
				false);
			boolean first = true;
			for( ConnectorFolder folder : folders )
			{
				final ObjectNode folderNode = objectMapper.createObjectNode();
				folderNode.put("id", folder.getId());
				folderNode.put("name", folder.getName());
				folderNode.put("targetable", true);
				folderNode.put("selected",
					(!isDefaultApplicable && first) || (isDefaultApplicable && selected.equals(folder.getId())));
				foldersNode.add(folderNode);
				first = false;

				recurseFolder(connector, courseId, folder, folderNode, selected);
			}

			final PrettyPrinter pp = new MinimalPrettyPrinter();
			try
			{
				structure = objectMapper.writer().with(pp).writeValueAsString(root);
			}
			catch( JsonProcessingException e )
			{
				throw Throwables.propagate(e);
			}

			if( structure == null )
			{
				// Can't happen
				throw new RuntimeException("Could not create structure");
			}
			courseStructureCache.put(cacheKey, structure);
		}

		return structure;
	}
	catch( LmsUserNotFoundException lms )
	{
		throw Throwables.propagate(lms);
	}
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
/**
 * Instantiates a new Bean object json serializer.
 */
BeanObjectJsonSerializer() {
    super(new MinimalPrettyPrinter());
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@Override
public void init(Map<String, String> writerOptions) throws IOException {
  this.location = writerOptions.get("location");
  this.prefix = writerOptions.get("prefix");
  this.fieldDelimiter = writerOptions.get("separator");
  this.extension = writerOptions.get("extension");
  this.useExtendedOutput = Boolean.parseBoolean(writerOptions.get("extended"));
  this.skipNullFields = Boolean.parseBoolean(writerOptions.get("skipnulls"));
  final boolean uglify = Boolean.parseBoolean(writerOptions.get("uglify"));

  Configuration conf = new Configuration();
  conf.set(FileSystem.FS_DEFAULT_NAME_KEY, writerOptions.get(FileSystem.FS_DEFAULT_NAME_KEY));
  this.fs = FileSystem.get(conf);

  Path fileName = new Path(location, prefix + "_" + index + "." + extension);
  try {
    // json writer does not support partitions, so only one file can be created
    // and thus only one location should be deleted in case of abort
    // to ensure that our writer was the first to create output file,
    // we create empty output file first and fail if file exists
    cleanUpLocation = storageStrategy.createFileAndApply(fs, fileName);

    // since empty output file will be overwritten (some file systems may restrict append option)
    // we need to re-apply file permission
    stream = fs.create(fileName);
    storageStrategy.applyToFile(fs, fileName);

    JsonGenerator generator = factory.createGenerator(stream).useDefaultPrettyPrinter()
        .configure(JsonGenerator.Feature.QUOTE_NON_NUMERIC_NUMBERS,
            !Boolean.parseBoolean(writerOptions.get("enableNanInf")));
    if (uglify) {
      generator = generator.setPrettyPrinter(new MinimalPrettyPrinter(LINE_FEED));
    }
    if(useExtendedOutput){
      gen = new ExtendedJsonOutput(generator);
    }else{
      gen = new BasicJsonOutput(generator);
    }
    logger.debug("Created file: {}", fileName);
  } catch (IOException ex) {
    logger.error("Unable to create file: " + fileName, ex);
    throw ex;
  }
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
public JsonWriter(OutputStream os, Charset charset, ObjectMapper mapper) throws IOException {
    generator = mapper.getFactory()
            .createGenerator(new OutputStreamWriter(os, charset))
            .configure(JsonGenerator.Feature.AUTO_CLOSE_TARGET, false)
            .setPrettyPrinter(new MinimalPrettyPrinter(""));
}
 

import com.fasterxml.jackson.core.util.MinimalPrettyPrinter; //导入依赖的package包/类
@Override
protected PrettyPrinter newCompactPrinter() {
    return new MinimalPrettyPrinter();
}