Example usage for com.fasterxml.jackson.core JsonParser nextToken

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonParser nextToken.

Prototype

public abstract JsonToken nextToken() throws IOException, JsonParseException;

Source Link

Document

Main iteration method, which will advance stream enough to determine type of the next token, if any.

Usage

From source file:com.cinnober.msgcodec.json.TypeScannerJsonParserTest.java

@Test
public void test1() throws IOException {
    JsonParser p = new JsonFactory().createParser("{\"a\":1, \"$type\":\"x\", \"b\":1.1}");
    p.nextToken(); // START_OBJECT
    p.nextToken(); // FIELD_NAME
    TypeScannerJsonParser p2 = new TypeScannerJsonParser(p);
    assertEquals("x", p2.findType());

    assertNextField("a", p2);
    assertNextIntValue(1, p2);//from   w w  w.  j a v  a  2  s. c  om

    assertNextField("b", p2);
    assertNextFloatValue(1.1, p2);

    assertEquals(JsonToken.END_OBJECT, p2.nextToken());
    assertNull(p2.nextToken());
}

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From source file:com.cinnober.msgcodec.json.TypeScannerJsonParserTest.java

@Test
public void test2() throws IOException {
    JsonParser p = new JsonFactory().createParser("{\"a\":1, \"b\":1.1, \"$type\":\"x\"}");
    p.nextToken(); // START_OBJECT
    p.nextToken(); // FIELD_NAME
    TypeScannerJsonParser p2 = new TypeScannerJsonParser(p);
    assertEquals("x", p2.findType());

    assertNextField("a", p2);
    assertNextIntValue(1, p2);/*from   w ww  .j a v  a2s  .c  o m*/

    assertNextField("b", p2);
    assertNextFloatValue(1.1, p2);

    assertEquals(JsonToken.END_OBJECT, p2.nextToken());
    assertNull(p2.nextToken());
}

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From source file:com.sdl.odata.unmarshaller.json.JsonLinkUnmarshaller.java

@Override
protected String getToEntityId(ODataRequestContext requestContext) throws ODataUnmarshallingException {
    // The body is expected to contain a single entity reference
    // See OData JSON specification chapter 13

    String bodyText;//from  w  w  w.jav  a  2s  .c o  m
    try {
        bodyText = requestContext.getRequest().getBodyText(StandardCharsets.UTF_8.name());
    } catch (UnsupportedEncodingException e) {
        throw new ODataSystemException("UTF-8 is not supported", e);
    }

    String idValue = null;
    try {
        JsonParser parser = new JsonFactory().createParser(bodyText);
        while (idValue == null && !parser.isClosed()) {
            JsonToken token = parser.nextToken();
            if (token == null) {
                break;
            }

            if (token.equals(JsonToken.FIELD_NAME) && parser.getCurrentName().equals(JsonConstants.ID)) {
                token = parser.nextToken();
                if (token.equals(JsonToken.VALUE_STRING)) {
                    idValue = parser.getText();
                }
            }
        }
    } catch (IOException e) {
        throw new ODataUnmarshallingException("Error while parsing JSON data", e);
    }

    if (isNullOrEmpty(idValue)) {
        throw new ODataUnmarshallingException("The JSON object in the body has no '@odata.id' value,"
                + " or the value is empty. The JSON object in the body must have an '@odata.id' value"
                + " that refers to the entity to link to.");
    }

    return idValue;
}

---

From source file:com.world.watch.worldwatchcron.util.WWCron.java

public long extractLatestTimeStamp(String newsJson) {
    long maxTS = 0;
    JsonFactory factory = new JsonFactory();
    try {/*  w  w w  .  j a v  a2 s. co m*/
        JsonParser parser = factory.createParser(newsJson);
        while (!parser.isClosed()) {
            JsonToken token = parser.nextToken();
            if (token == null) {
                break;
            }
            String fieldName = parser.getCurrentName();
            if (fieldName != null && fieldName.equals("date")) {
                parser.nextToken();
                long date = Long.parseLong(parser.getText());
                if (maxTS < date) {
                    maxTS = date;
                }
            }
        }
    } catch (JsonParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        //logger.error("File not found ", e);
    }
    return maxTS;
}

---

From source file:org.apache.ode.jacob.soup.jackson.ChannelProxyDeserializer.java

@Override
public Channel deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {

    String type = null;//from w w  w .j a v a2  s  . co  m
    int id = -1;
    while (jp.nextToken() != JsonToken.END_OBJECT) {
        String fieldname = jp.getCurrentName();
        if (jp.getCurrentToken() == JsonToken.FIELD_NAME) {
            // if we're not already on the field, advance by one.
            jp.nextToken();
        }
        if ("channelType".equals(fieldname)) {
            type = jp.getText();
        } else if ("channelId".equals(fieldname)) {
            id = jp.getIntValue();
        }
    }

    if (type == null) {
        throw ctxt.mappingException(Channel.class);
    }

    if (id < 0) {
        throw ctxt.mappingException(Channel.class);
    }

    try {
        CommChannel cchannel = new CommChannel(ctxt.findClass(type));
        cchannel.setId(id);
        return (Channel) ChannelFactory.createChannel(cchannel, cchannel.getType());

    } catch (ClassNotFoundException e) {
        throw ctxt.instantiationException(Channel.class, e);
    }
}

---

From source file:org.dbrain.data.jackson.JacksonSerializer.java

/**
 * Check that there is no more token on the wire.
 *//*from  w  w w.  ja v  a2  s . com*/
private void checkEof(JsonParser parser) throws IOException {
    JsonToken token = parser.nextToken();
    if (token != null) {
        throw new ParseException("Unexpected json token: " + token.name());
    }
}

---

From source file:YDExtBattriReader.java

@Override
protected void read(OpenRtb.BidRequest.Imp.Native.Builder message, JsonParser par) throws IOException {
    if (Constants.EXTEND_BATTRI_FIELD_NAME.equals(getCurrentName(par))) {
        List<Integer> battris = new ArrayList<Integer>();
        for (startArray(par); endArray(par); par.nextToken()) {
            try {
                int battri = Integer.parseInt(par.getText());
                battris.add(battri);/* w  w  w  .jav a 2  s .c o  m*/
            } catch (Exception e) {
                logger.warn("battri is not a int value.", e);
            }
        }
        if (battris.isEmpty())
            return;
        message.setExtension(OpenRtbYDExtForDsp.battri, battris);
    }
}

---

From source file:com.basistech.rosette.dm.jackson.ListAttributeDeserializer.java

@SuppressWarnings("unchecked")
private ListAttribute deserialize(JsonParser jp, DeserializationContext ctxt, TokenBuffer tb)
        throws IOException {
    jp.nextToken();
    String keyName = jp.getText();

    if (tb != null) { // need to put back skipped properties?
        jp = JsonParserSequence.createFlattened(tb.asParser(jp), jp);
    }// w ww.j a v  a2  s  .c om
    // Must point to the next value; tb had no current, jp pointed to VALUE_STRING:

    KnownAttribute attribute = KnownAttribute.getAttributeForKey(keyName);
    if (attribute == null) {
        attribute = KnownAttribute.UNKNOWN;
    }
    Class<? extends BaseAttribute> itemClass = attribute.attributeClass();

    ListAttribute.Builder<BaseAttribute> builder = new ListAttribute.Builder<>(attribute.attributeClass());
    List<BaseAttribute> items = Lists.newArrayList();

    JsonToken nextToken;
    while ((nextToken = jp.nextToken()) != JsonToken.END_OBJECT) {
        if (nextToken != JsonToken.FIELD_NAME) {
            throw ctxt.wrongTokenException(jp, JsonToken.END_OBJECT, "Expected field name.");
        } else {
            String name = jp.getCurrentName();
            if ("items".equals(name)) {
                // the actual list items.
                nextToken = jp.nextToken();
                if (nextToken == JsonToken.VALUE_EMBEDDED_OBJECT) {
                    Object o = jp.getEmbeddedObject();
                    if (o instanceof List) { // could it be an array, also?!?
                        // when using JsonTree, sometimes Jackson just sticks the entire Java object in here.
                        items.addAll((List) o);
                    } else {
                        throw ctxt.mappingException(
                                "List contains VALUE_EMBEDDED_OBJECT for items, but it wasn't a list.");
                    }
                } else if (nextToken != JsonToken.START_ARRAY) { // what about nothing?
                    throw ctxt.wrongTokenException(jp, JsonToken.START_ARRAY, "Expected array of items");
                } else {
                    // the START_ARRAY case, which is _normal_. Read the elements.
                    while (jp.nextToken() != JsonToken.END_ARRAY) {
                        items.add(jp.readValueAs(itemClass));
                    }
                }
            } else {
                nextToken = jp.nextToken();
                Object value;
                if (nextToken == JsonToken.VALUE_EMBEDDED_OBJECT) {
                    value = jp.getEmbeddedObject();
                } else {
                    value = jp.readValueAs(Object.class);
                }
                builder.extendedProperty(name, value);
            }
        }
    }
    builder.setItems(items);
    return builder.build();
}

---

From source file:org.jsfr.json.JacksonParserTest.java

@Test
public void testLargeJsonJackson() throws Exception {
    final AtomicLong counter = new AtomicLong();
    ObjectMapper om = new ObjectMapper();
    JsonFactory f = new JsonFactory();
    JsonParser jp = f.createParser(read("allthethings.json"));
    long start = System.currentTimeMillis();
    jp.nextToken();
    jp.nextToken();/*from w  w  w .  j a va2s .  c  om*/
    jp.nextToken();
    while (jp.nextToken() == JsonToken.FIELD_NAME) {
        if (jp.nextToken() == JsonToken.START_OBJECT) {
            TreeNode tree = om.readTree(jp);
            counter.incrementAndGet();
            LOGGER.trace("value: {}", tree);
        }
    }
    jp.close();
    LOGGER.info("Jackson processes {} value in {} millisecond", counter.get(),
            System.currentTimeMillis() - start);
}

---

From source file:com.pursuer.reader.easyrss.data.parser.TagJSONParser.java

public void parse() throws JsonParseException, IOException, IllegalStateException {
    final JsonFactory factory = new JsonFactory();
    final JsonParser parser = factory.createJsonParser(input);
    Tag tag = new Tag();
    int level = 0;
    boolean found = false;
    while (parser.nextToken() != null) {
        final String name = parser.getCurrentName();
        switch (parser.getCurrentToken()) {
        case START_OBJECT:
        case START_ARRAY:
            level++;//from w w w.  j  a  v  a  2  s .co  m
            break;
        case END_OBJECT:
        case END_ARRAY:
            level--;
            break;
        case VALUE_STRING:
            if (level == 3) {
                if ("id".equals(name)) {
                    tag.setUid(parser.getText());
                } else if ("sortid".equals(name)) {
                    tag.setSortId(parser.getText());
                }
            }
        case FIELD_NAME:
            if (level == 1 && "tags".equals(name)) {
                found = true;
            }
        default:
        }
        if (level == 2) {
            if (tag.getUid() != null && listener != null) {
                listener.onTagRetrieved(tag);
            }
            tag = new Tag();
        }
    }
    parser.close();
    if (!found) {
        throw new IllegalStateException("Invalid JSON input");
    }
}

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