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:org.mayocat.jackson.OptionalStringListDeserializer.java

@Override
public Optional<List<String>> deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {
    if (jp.getCurrentToken().isScalarValue()) {
        // value is only one string
        return Optional.of(Arrays.asList(jp.getValueAsString()));
    } else {// w w w  . j  a  va2  s  . com
        // Value is a list of strings
        List<String> result = Lists.newArrayList();
        while (jp.nextToken().isScalarValue()) {
            String value = jp.getValueAsString();
            result.add(value);
        }
        return Optional.of(result);
    }
}

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From source file:com.cedarsoft.couchdb.io.ActionFailedExceptionSerializer.java

@Nonnull
public ActionFailedException deserialize(int status, @Nonnull InputStream in)
        throws VersionException, IOException {
    try (MaxLengthByteArrayOutputStream teedOut = new MaxLengthByteArrayOutputStream();
            TeeInputStream teeInputStream = new TeeInputStream(in, teedOut)) {

        JsonFactory jsonFactory = JacksonSupport.getJsonFactory();

        JsonParser parser = jsonFactory.createJsonParser(teeInputStream);
        JacksonParserWrapper parserWrapper = new JacksonParserWrapper(parser);

        parserWrapper.nextToken(JsonToken.START_OBJECT);

        String error = null;//from  w w  w  .  j a  v  a2  s. com
        String reason = null;

        while (parser.nextToken() == JsonToken.FIELD_NAME) {
            String currentName = parser.getCurrentName();

            if (currentName.equals(PROPERTY_ERROR)) {
                parserWrapper.nextToken(JsonToken.VALUE_STRING);
                error = parser.getText();
                continue;
            }

            if (currentName.equals(PROPERTY_REASON)) {
                parserWrapper.nextToken(JsonToken.VALUE_STRING);
                reason = parser.getText();
                continue;
            }

            throw new IllegalStateException("Unexpected field reached <" + currentName + ">");
        }

        parserWrapper.verifyDeserialized(error, PROPERTY_ERROR);
        parserWrapper.verifyDeserialized(reason, PROPERTY_REASON);
        assert reason != null;
        assert error != null;

        parserWrapper.ensureObjectClosed();

        return new ActionFailedException(status, error, reason, teedOut.toByteArray());
    }
}

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

@Override
public Object decode(InputStream in) throws IOException {
    JsonFactory f = new JsonFactory();
    JsonParser p = f.createParser(in);
    JsonToken token = p.nextToken();
    if (token == JsonToken.VALUE_NULL) {
        return null;
    } else if (token != JsonToken.START_OBJECT) {
        throw new DecodeException("Expected {");
    }/*from  w ww .  ja  v  a2s .  co m*/
    return dynamicGroupHandler.readValue(p);
}

---

From source file:org.oscim.tiling.source.geojson.GeoJsonTileDecoder.java

private void parseMulti(JsonParser jp, GeometryType type) throws JsonParseException, IOException {

    for (JsonToken t; (t = jp.nextToken()) != null;) {
        if (t == END_ARRAY)
            break;

        if (t == START_ARRAY) {
            if (type == GeometryType.POLY)
                parsePolygon(jp);//w w w  .  ja v a2 s .  co  m

            else if (type == GeometryType.LINE)
                parseLineString(jp);

            else if (type == GeometryType.POINT)
                parseCoordinate(jp);
            ;

        } else {
            //....
        }
    }
}

---

From source file:net.floodlightcontroller.loadbalancer.MonitorsResource.java

protected LBMonitor jsonToMonitor(String json) throws IOException {
    MappingJsonFactory f = new MappingJsonFactory();
    JsonParser jp;
    LBMonitor monitor = new LBMonitor();

    try {/*from   ww w . j a v  a2 s. c  o m*/
        jp = f.createJsonParser(json);
    } catch (JsonParseException e) {
        throw new IOException(e);
    }

    jp.nextToken();
    if (jp.getCurrentToken() != JsonToken.START_OBJECT) {
        throw new IOException("Expected START_OBJECT");
    }

    while (jp.nextToken() != JsonToken.END_OBJECT) {
        if (jp.getCurrentToken() != JsonToken.FIELD_NAME) {
            throw new IOException("Expected FIELD_NAME");
        }

        String n = jp.getCurrentName();
        jp.nextToken();
        if (jp.getText().equals(""))
            continue;
        else if (n.equals("monitor")) {
            while (jp.nextToken() != JsonToken.END_OBJECT) {
                String field = jp.getCurrentName();

                if (field.equals("id")) {
                    monitor.id = jp.getText();
                    continue;
                }
                if (field.equals("name")) {
                    monitor.name = jp.getText();
                    continue;
                }
                if (field.equals("type")) {
                    monitor.type = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("delay")) {
                    monitor.delay = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("timeout")) {
                    monitor.timeout = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("attempts_before_deactivation")) {
                    monitor.attemptsBeforeDeactivation = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("network_id")) {
                    monitor.netId = jp.getText();
                    continue;
                }
                if (field.equals("address")) {
                    monitor.address = Integer.parseInt(jp.getText());
                    continue;
                }
                if (field.equals("protocol")) {
                    monitor.protocol = Byte.parseByte(jp.getText());
                    continue;
                }
                if (field.equals("port")) {
                    monitor.port = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("admin_state")) {
                    monitor.adminState = Short.parseShort(jp.getText());
                    continue;
                }
                if (field.equals("status")) {
                    monitor.status = Short.parseShort(jp.getText());
                    continue;
                }

                log.warn("Unrecognized field {} in " + "parsing Vips", jp.getText());
            }
        }
    }
    jp.close();

    return monitor;
}

---

From source file:org.oscim.tiling.source.geojson.GeoJsonTileDecoder.java

@Override
public boolean decode(Tile tile, ITileDataSink sink, InputStream is) throws IOException {
    mTileDataSink = sink;/*from   ww w. j  av  a  2s  .c  om*/
    mTileScale = 1 << tile.zoomLevel;
    mTileX = tile.tileX / mTileScale;
    mTileY = tile.tileY / mTileScale;
    mTileScale *= Tile.SIZE;

    JsonParser jp = mJsonFactory.createParser(new InputStreamReader(is));

    for (JsonToken t; (t = jp.nextToken()) != null;) {
        if (t == FIELD_NAME) {
            if (match(jp, FIELD_FEATURES)) {
                if (jp.nextToken() != START_ARRAY)
                    continue;

                while ((t = jp.nextToken()) != null) {
                    if (t == START_OBJECT)
                        parseFeature(jp);

                    if (t == END_ARRAY)
                        break;
                }
            }
        }
    }
    return true;
}

---

From source file:org.oscim.tiling.source.geojson.GeoJsonTileDecoder.java

private void parsePolygon(JsonParser jp) throws JsonParseException, IOException {
    int ring = 0;

    for (JsonToken t; (t = jp.nextToken()) != null;) {
        if (t == START_ARRAY) {
            if (ring == 0)
                mMapElement.startPolygon();
            else// w  w w  .ja v a  2  s  .  com
                mMapElement.startHole();

            ring++;
            parseCoordSequence(jp);
            removeLastPoint();
            continue;
        }

        if (t == END_ARRAY)
            break;
    }
}

---

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

/**
 * Read a static group from the specified stream, when the JSON does not contain the '$type' field.
 *
 * @param groupType the expected group type, not null.
 * @param in the stream to read from, not null.
 * @return the decoded value.//from   www  .j a  va2  s  .  c  o m
 * @throws IOException if the underlying stream throws an exception.
 * @throws DecodeException if the value could not be decoded, or if a required field is missing.
 */
public Object decodeStatic(Object groupType, InputStream in) throws IOException {
    StaticGroupHandler groupHandler = staticGroupsByGroupType.get(groupType);
    if (groupHandler == null) {
        throw new IllegalArgumentException("Unknown group type");
    }

    JsonFactory f = new JsonFactory();
    JsonParser p = f.createParser(in);
    JsonToken token = p.nextToken();
    if (token == JsonToken.VALUE_NULL) {
        return null;
    } else if (token != JsonToken.START_OBJECT) {
        throw new DecodeException("Expected {");
    }
    return groupHandler.readValue(p);
}

---

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

/**
 * Read a static group from the specified stream, when the JSON does not contain the '$type' field.
 *
 * @param groupName the expected group name, not null.
 * @param in the stream to read from, not null.
 * @return the decoded value.//from  w ww.  j  a  v a  2 s.c om
 * @throws IOException if the underlying stream throws an exception.
 * @throws DecodeException if the value could not be decoded, or if a required field is missing.
 */
public Object decodeStatic(String groupName, InputStream in) throws IOException {
    StaticGroupHandler groupHandler = lookupGroupByName(groupName);
    if (groupHandler == null) {
        throw new IllegalArgumentException("Unknown group name");
    }

    JsonFactory f = new JsonFactory();
    JsonParser p = f.createParser(in);
    JsonToken token = p.nextToken();
    if (token == JsonToken.VALUE_NULL) {
        return null;
    } else if (token != JsonToken.START_OBJECT) {
        throw new DecodeException("Expected {");
    }
    return groupHandler.readValue(p);
}

---

From source file:org.apache.lucene.server.handlers.AddDocumentHandler.java

/** Parses the current json token into the corresponding
 *  java object. *//* w  w w  . j  av a 2s  .  c o  m*/
private static Object getNativeValue(FieldDef fd, JsonToken token, JsonParser p) throws IOException {
    Object o;
    if (token == JsonToken.VALUE_STRING) {
        o = p.getText();
    } else if (token == JsonToken.VALUE_NUMBER_INT) {
        o = Long.valueOf(p.getLongValue());
    } else if (token == JsonToken.VALUE_NUMBER_FLOAT) {
        o = Double.valueOf(p.getDoubleValue());
    } else if (token == JsonToken.VALUE_TRUE) {
        o = Boolean.TRUE;
    } else if (token == JsonToken.VALUE_FALSE) {
        o = Boolean.FALSE;
    } else if (fd.faceted.equals("hierarchy") && token == JsonToken.START_ARRAY) {
        if (fd.multiValued == false) {
            List<String> values = new ArrayList<>();
            while (true) {
                token = p.nextToken();
                if (token == JsonToken.END_ARRAY) {
                    break;
                } else if (token != JsonToken.VALUE_STRING) {
                    if (token == JsonToken.START_ARRAY) {
                        fail(fd.name, "expected array of strings, but saw array inside array");
                    } else {
                        fail(fd.name, "expected array of strings, but saw " + token + " inside array");
                    }
                }
                values.add(p.getText());
            }
            o = values;
        } else {
            List<List<String>> values = new ArrayList<>();
            while (true) {
                token = p.nextToken();
                if (token == JsonToken.END_ARRAY) {
                    break;
                } else if (token == JsonToken.START_ARRAY) {
                    List<String> sub = new ArrayList<>();
                    values.add(sub);
                    while (true) {
                        token = p.nextToken();
                        if (token == JsonToken.VALUE_STRING) {
                            sub.add(p.getText());
                        } else if (token == JsonToken.END_ARRAY) {
                            break;
                        } else {
                            fail(fd.name, "expected array of strings or array of array of strings, but saw "
                                    + token + " inside inner array");
                        }
                    }
                } else if (token == JsonToken.VALUE_STRING) {
                    List<String> sub = new ArrayList<>();
                    values.add(sub);
                    sub.add(p.getText());
                } else if (token == JsonToken.START_ARRAY) {
                    fail(fd.name, "expected array of strings, but saw array inside array");
                } else {
                    fail(fd.name, "expected array of strings, but saw " + token + " inside array");
                }
            }
            o = values;
        }
    } else if (fd.valueType == FieldDef.FieldValueType.LAT_LON) {
        if (token != JsonToken.START_ARRAY) {
            fail(fd.name, "latlon field must be [lat, lon] value; got " + token);
        }
        double[] latLon = new double[2];
        token = p.nextToken();
        if (token != JsonToken.VALUE_NUMBER_FLOAT) {
            fail(fd.name, "latlon field must be [lat, lon] value; got " + token);
        }
        latLon[0] = p.getDoubleValue();
        token = p.nextToken();
        if (token != JsonToken.VALUE_NUMBER_FLOAT) {
            fail(fd.name, "latlon field must be [lat, lon] value; got " + token);
        }
        latLon[1] = p.getDoubleValue();
        token = p.nextToken();
        if (token != JsonToken.END_ARRAY) {
            fail(fd.name, "latlon field must be [lat, lon] value; got " + token);
        }
        o = latLon;
    } else {
        String message;
        if (token == JsonToken.VALUE_NULL) {
            message = "null field value not supported; just omit this field from the document instead";
        } else {
            message = "value in inner object field value should be string, int/long, float/double or boolean; got "
                    + token;
        }

        fail(fd.name, message);

        // Dead code but compiler disagrees:
        o = null;
    }
    return o;
}

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