Example usage for com.fasterxml.jackson.core JsonGenerator writeObject

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonGenerator writeObject.

Prototype

public abstract void writeObject(Object pojo) throws IOException, JsonProcessingException;

Source Link

Document

Method for writing given Java object (POJO) as Json.

Usage

From source file:com.iflytek.edu.cloud.frame.doc.BuildDocMain.java

public static void main(String[] args) throws Exception {
    ServiceDocBuilder docBuilder = new ServiceDocBuilder();
    ObjectMapper mapper = new ObjectMapper();
    mapper.enable(SerializationFeature.INDENT_OUTPUT);
    File jsonFile = getJsonFile();
    JsonGenerator jsonGenerator = mapper.getFactory().createGenerator(jsonFile, JsonEncoding.UTF8);
    jsonGenerator.writeObject(docBuilder.buildDoc());

    LOGGER.info("?API?" + jsonFile.getPath());
}

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From source file:org.datagator.tools.importer.Main.java

public static void main(String[] args) throws IOException {

    int columnHeaders = 0; // cli input
    int rowHeaders = 0; // cli input

    try {/*w  w  w. j a v a 2  s.  c  o m*/
        CommandLine cmds = parser.parse(opts, args);
        if (cmds.hasOption("filter")) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
        if (cmds.hasOption("layout")) {
            String[] layout = cmds.getOptionValues("layout");
            if ((layout == null) || (layout.length != 2)) {
                throw new IllegalArgumentException("Bad layout.");
            }
            try {
                columnHeaders = Integer.valueOf(layout[0]);
                rowHeaders = Integer.valueOf(layout[1]);
                if ((columnHeaders < 0) || (rowHeaders < 0)) {
                    throw new IllegalArgumentException("Bad layout.");
                }
            } catch (NumberFormatException ex) {
                throw new IllegalArgumentException(ex);
            }
        }
        if (cmds.hasOption("help")) {
            help.printHelp("importer", opts, true);
            System.exit(EX_OK);
        }
        // positional arguments, i.e., input file name(s)
        args = cmds.getArgs();
    } catch (ParseException ex) {
        throw new IllegalArgumentException(ex);
    } catch (IllegalArgumentException ex) {
        help.printHelp("importer", opts, true);
        throw ex;
    }

    JsonGenerator jg = json.createGenerator(System.out, JsonEncoding.UTF8);
    jg.setPrettyPrinter(new StandardPrinter());

    final Extractor extractor;

    if (args.length == 1) {
        extractor = new FileExtractor(new File(args[0]));
    } else if (args.length > 1) {
        throw new UnsupportedOperationException("Not supported yet.");
    } else {
        throw new IllegalArgumentException("Missing input.");
    }

    int columnsCount = -1;
    int matrixCount = 0;

    ArrayDeque<String> stack = new ArrayDeque<String>();

    AtomType token = extractor.nextAtom();
    while (token != null) {
        switch (token) {
        case FLOAT:
        case INTEGER:
        case STRING:
        case NULL:
            jg.writeObject(extractor.getCurrentAtomData());
            break;
        case START_RECORD:
            jg.writeStartArray();
            break;
        case END_RECORD:
            int _numFields = (Integer) extractor.getCurrentAtomData();
            if (columnsCount < 0) {
                columnsCount = _numFields;
            } else if (columnsCount != _numFields) {
                throw new RuntimeException(String.format("row %s has different length than previous rows",
                        String.valueOf(_numFields - 1)));
            }
            jg.writeEndArray();
            break;
        case START_GROUP:
            stack.push(String.valueOf(extractor.getCurrentAtomData()));
            jg.writeStartObject();
            jg.writeStringField("kind", "datagator#Matrix");
            jg.writeNumberField("columnHeaders", columnHeaders);
            jg.writeNumberField("rowHeaders", rowHeaders);
            jg.writeFieldName("rows");
            jg.writeStartArray();
            break;
        case END_GROUP:
            int rowsCount = (Integer) extractor.getCurrentAtomData();
            if (rowsCount == 0) {
                jg.writeStartArray();
                jg.writeEndArray();
                rowsCount = 1;
                columnsCount = 0;
            }
            jg.writeEndArray();
            jg.writeNumberField("rowsCount", rowsCount);
            jg.writeNumberField("columnsCount", columnsCount);
            jg.writeEndObject();
            matrixCount += 1;
            stack.pop();
            break;
        default:
            break;
        }
        token = extractor.nextAtom();
    }

    jg.close();

    System.exit(EX_OK);
}

---

From source file:org.springframework.rest.documentation.doclet.RestDoclet.java

public static boolean start(RootDoc rootDoc) throws IOException {

    Javadoc api = new JavadocProcessor().process(rootDoc);

    File outputDirectory = getOutputDirectory(rootDoc.options());

    if (!outputDirectory.isDirectory() && !outputDirectory.mkdirs()) {
        throw new IllegalStateException("Failed to create output directory " + outputDirectory);
    }//from  w  w w  .ja v a 2s .  co m

    File file = new File(outputDirectory, "javadoc.json");

    FileWriter writer = new FileWriter(file);

    JsonGenerator generator = new JsonFactory(new ObjectMapper()).createGenerator(writer)
            .useDefaultPrettyPrinter();

    generator.writeObject(api);

    return true;
}

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From source file:org.n52.restfulwpsproxy.serializer.json.AbstractWPSJsonModule.java

protected static final void writeArrayOfObjects(String fieldName, Object[] objects, JsonGenerator jg)
        throws IOException {
    jg.writeArrayFieldStart(fieldName);/*from w  ww.j  av  a2s.c o m*/
    for (Object o : objects) {
        jg.writeObject(o);
    }
    jg.writeEndArray();
}

---

From source file:com.amazonaws.services.dynamodbv2.datamodeling.DynamoDbPropertyMarshaller.java

public static AttributeValue getAttributeValue(final Object propertyValue,
        final PropertyDescriptor propertyDescriptor) {
    final Method readMethod = propertyDescriptor.getReadMethod();
    if (propertyValue == null) {
        return null;
    }//from  w w  w.  j a v  a 2 s  .c  o  m
    if (propertyValue instanceof Collection && ((Collection<?>) propertyValue).isEmpty()) {
        return null;
    }
    final DynamoDBReflectorUtil reflector = new DynamoDBReflectorUtil();
    try {
        final ArgumentMarshaller marshaller = reflector.getArgumentMarshaller(readMethod);
        return marshaller.marshall(propertyValue);
    } catch (final DynamoDBMappingException e) {
        try {
            final StringWriter output = new StringWriter();
            final JsonGenerator jsonGenerator = jsonFactory.createGenerator(output);
            jsonGenerator.writeObject(propertyValue);
            return new AttributeValue(output.toString());
        } catch (final IOException ioException) {
            throw new IllegalStateException(ioException);
        }
    }
}

---

From source file:com.amazonaws.services.dynamodbv2.datamodeling.DynamoDbPropertyMarshaller.java

public static <T extends Item> AttributeValue getValue(final T item,
        final PropertyDescriptor propertyDescriptor) {
    final Method readMethod = propertyDescriptor.getReadMethod();
    Object propertyValue;/*from   w ww . j av a 2 s  .c o  m*/
    try {
        propertyValue = readMethod.invoke(item);
    } catch (final Exception e) {
        throw new IllegalStateException(e);
    }
    if (propertyValue == null) {
        return null;
    }
    if (propertyValue instanceof Collection && ((Collection<?>) propertyValue).isEmpty()) {
        return null;
    }
    final DynamoDBReflectorUtil reflector = new DynamoDBReflectorUtil();
    try {
        final ArgumentMarshaller marshaller = reflector.getArgumentMarshaller(readMethod);
        return marshaller.marshall(propertyValue);
    } catch (final DynamoDBMappingException e) {
        try {
            final StringWriter output = new StringWriter();
            final JsonGenerator jsonGenerator = jsonFactory.createGenerator(output);
            jsonGenerator.writeObject(propertyValue);
            return new AttributeValue(output.toString());
        } catch (final IOException ioException) {
            throw new IllegalStateException(ioException);
        }
    }
}

---

From source file:io.wcm.caravan.pipeline.impl.JacksonFunctions.java

/**
 * Serializes the given JSON node using the default factory
 * @param node/*w  ww  .  j  av  a  2 s  .  co m*/
 * @return JSON string
 * @throws JsonPipelineOutputException if the given node can not be serialized
 */
public static String nodeToString(JsonNode node) {
    try {
        StringWriter writer = new StringWriter();
        JsonGenerator generator = jsonFactory.createGenerator(writer);
        generator.writeObject(node);
        return writer.toString();
    } catch (IOException ex) {
        throw new JsonPipelineOutputException("Failed to serialize JsonNode. This was quite unexpected.", ex);
    }
}

---

From source file:com.google.api.server.spi.config.annotationreader.ApiAnnotationIntrospector.java

@Nullable
private static <TFrom, TTo> JsonSerializer<TFrom> getJsonSerializer(
        @Nullable final Transformer<TFrom, TTo> serializer) {
    if (serializer == null) {
        return null;
    }/*from  ww w .  j a va2  s  . c  o  m*/
    return new JsonSerializer<TFrom>() {
        @Override
        public void serialize(TFrom value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
            jgen.writeObject(serializer.transformTo(value));
        }
    };
}

---

From source file:je.backit.rest.JooqModule.java

static void writeField(String name, Object value, JsonGenerator jg) throws IOException {
    if (value == null)
        return;//from  w w  w .  ja  v a  2 s.  c o  m
    jg.writeFieldName(toCamelCaseLC(name));
    if (name.equals("properties"))
        jg.writeRawValue((String) value);
    else
        jg.writeObject(value);
}

---

From source file:org.loklak.objects.AbstractIndexEntry.java

public static void writeArray(JsonGenerator json, String fieldName, String[] array) throws IOException {
    json.writeArrayFieldStart(fieldName);
    for (String o : array)
        json.writeObject(o);
    json.writeEndArray();/*from   w w  w .  j  a  v a 2  s.  c o  m*/
}

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