Example usage for com.fasterxml.jackson.core JsonToken START_OBJECT

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In this page you can find the example usage for com.fasterxml.jackson.core JsonToken START_OBJECT.

Prototype

JsonToken START_OBJECT

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Document

START_OBJECT is returned when encountering '{' which signals starting of an Object value.

Usage

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.// ww  w.ja v a 2  s. co 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:org.apache.lucene.server.handlers.AddDocumentHandler.java

/** Parse a Document using Jackson's streaming parser
 *  API.  The document should look like {indexName: 'foo',
 *  fields: {..., ...}} *///from  w  ww. j a v a 2s.c  om
public static Document parseDocument(IndexState state, JsonParser p) throws IOException {
    JsonToken token = p.nextToken();
    if (token == JsonToken.END_ARRAY) {
        // nocommit hackish.. caller should tell us this means "end"?
        return null;
    } else if (token != JsonToken.START_OBJECT) {
        throw new IllegalArgumentException("expected JSON Object");
    }

    final Document doc = new Document();
    while (true) {
        token = p.nextToken();
        if (token == JsonToken.END_OBJECT) {
            break;
        }
        assert token == JsonToken.FIELD_NAME : token;

        String fieldName = p.getText();
        if (fieldName.equals("fields")) {
            parseFields(state, doc, p);
        } else {
            // Let a plugin handle it:
            boolean handled = false;
            for (PostHandle postHandle : postHandlers) {
                if (postHandle.invoke(state, fieldName, p, doc)) {
                    handled = true;
                    break;
                }
            }

            if (!handled) {
                throw new IllegalArgumentException("unrecognized field " + p.getText());
            }
        }

        // nocommit need test that same field name can't
        // appear more than once?  app must put all values for
        // a given field into an array (for a multi-valued
        // field) 
    }

    return doc;
}

---

From source file:com.bazaarvoice.jackson.rison.RisonParser.java

/**
 * @return Next token from the stream, if any found, or null
 *   to indicate end-of-input/*from w w  w .java  2s.c  o  m*/
 */
@Override
public JsonToken nextToken() throws IOException, JsonParseException {
    _numTypesValid = NR_UNKNOWN;

    if (_currToken == null && _parsingContext.inRoot()) {
        if (isRisonEnabled(Feature.A_RISON)) {
            _parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
            return (_currToken = JsonToken.START_ARRAY);
        } else if (isRisonEnabled(Feature.O_RISON)) {
            _parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
            return (_currToken = JsonToken.START_OBJECT);
        }
    }

    /* First: field names are special -- we will always tokenize
     * (part of) value along with field name to simplify
     * state handling. If so, can and need to use secondary token:
     */
    if (_currToken == JsonToken.FIELD_NAME) {
        return _nextAfterName();
    }
    if (_tokenIncomplete) {
        _skipString(); // only strings can be partial
    }
    int i = _nextChOrEnd();
    if (i < 0) { // end-of-input
        /* 19-Feb-2009, tatu: Should actually close/release things
         *    like input source, symbol table and recyclable buffers now.
         */
        close();
        if (_parsingContext.getParent().inRoot()) {
            if (isRisonEnabled(Feature.A_RISON) && _parsingContext.inArray()) {
                _parsingContext = _parsingContext.getParent();
                return (_currToken = JsonToken.END_ARRAY);
            }
            if (isRisonEnabled(Feature.O_RISON) && _parsingContext.inObject()) {
                _parsingContext = _parsingContext.getParent();
                return (_currToken = JsonToken.END_OBJECT);
            }
        }
        _handleEOF();
        return (_currToken = null);
    }

    /* First, need to ensure we know the starting location of token
     * after skipping leading white space
     */
    _tokenInputTotal = _currInputProcessed + _inputPtr - 1;
    _tokenInputRow = _currInputRow;
    _tokenInputCol = _inputPtr - _currInputRowStart - 1;

    // finally: clear any data retained so far
    _binaryValue = null;

    // Closing scope?
    if (i == ')') {
        if (_parsingContext.inArray()) {
            _parsingContext = _parsingContext.getParent();
            return (_currToken = JsonToken.END_ARRAY);
        }
        if (_parsingContext.inObject()) {
            _parsingContext = _parsingContext.getParent();
            return (_currToken = JsonToken.END_OBJECT);
        }
        _reportMismatchedEndMarker(i, ')');
    }

    // Nope: do we then expect a comma?
    if (_parsingContext.expectComma()) {
        if (i != INT_COMMA) {
            _reportUnexpectedChar(i,
                    "was expecting comma to separate " + _parsingContext.getTypeDesc() + " entries");
        }
        i = _nextCh();
    }

    /* And should we now have a name? Always true for
     * Object contexts, since the intermediate 'expect-value'
     * state is never retained.
     */
    boolean inObject = _parsingContext.inObject();
    if (inObject) {
        // First, field name itself:
        String name;
        if (i != INT_APOSTROPHE) {
            name = _parseUnquotedFieldName(i);
        } else {
            name = _parseFieldName(i);
        }
        _parsingContext.setCurrentName(name);
        _currToken = JsonToken.FIELD_NAME;
        i = _nextCh();
        if (i != INT_COLON) {
            _reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
        }
        i = _nextCh();
    }

    // Ok: we must have a value... what is it?

    JsonToken t;

    switch (i) {
    case INT_APOSTROPHE:
        _tokenIncomplete = true;
        t = JsonToken.VALUE_STRING;
        break;
    case '(':
        if (!inObject) {
            _parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
        }
        t = JsonToken.START_OBJECT;
        break;
    case ')':
        // Error: ')' is not valid at this point; valid closers have
        // been handled earlier
        _reportUnexpectedChar(i, "expected a value");

    case INT_MINUS:
        /* Should we have separate handling for plus? Although
        * it is not allowed per se, it may be erroneously used,
        * and could be indicate by a more specific error message.
        */
    case INT_0:
    case INT_1:
    case INT_2:
    case INT_3:
    case INT_4:
    case INT_5:
    case INT_6:
    case INT_7:
    case INT_8:
    case INT_9:
        t = parseNumberText(i);
        break;

    case '!':
        i = _nextCh();
        switch (i) {
        case '(':
            if (!inObject) {
                _parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
            }
            t = JsonToken.START_ARRAY;
            break;
        case INT_t:
            t = JsonToken.VALUE_TRUE;
            break;
        case INT_f:
            t = JsonToken.VALUE_FALSE;
            break;
        case INT_n:
            t = JsonToken.VALUE_NULL;
            break;
        default:
            t = _handleUnexpectedValue(i);
            break;
        }
        break;
    default:
        if (IdentifierUtils.isIdStartLenient(i)) {
            t = JsonToken.VALUE_STRING;
            _inputPtr--; // push back the first char
            _parseUnquotedString();
        } else {
            t = _handleUnexpectedValue(i);
        }
        break;
    }

    if (inObject) {
        _nextToken = t;
        return _currToken;
    }
    _currToken = t;
    return t;
}

---

From source file:com.netflix.hollow.jsonadapter.HollowJsonAdapter.java

private int addSubArray(JsonParser parser, String arrayType, HollowWriteRecord arrayRec) throws IOException {
    JsonToken token = parser.nextToken();
    arrayRec.reset();//  w ww . j  av  a 2s .c o  m

    HollowCollectionSchema schema = (HollowCollectionSchema) hollowSchemas.get(arrayType);
    ObjectFieldMapping valueRec = null;
    ObjectMappedFieldPath fieldMapping = null;

    while (token != JsonToken.END_ARRAY) {

        int elementOrdinal;

        if (token == JsonToken.START_OBJECT || token == JsonToken.START_ARRAY) {
            elementOrdinal = parseSubType(parser, token, schema.getElementType());
        } else {
            if (valueRec == null) {
                valueRec = getObjectFieldMapping(schema.getElementType());
                fieldMapping = valueRec.getSingleFieldMapping();
            }

            addObjectField(parser, token, fieldMapping);
            elementOrdinal = valueRec.build(-1);
        }

        if (arrayRec instanceof HollowListWriteRecord) {
            ((HollowListWriteRecord) arrayRec).addElement(elementOrdinal);
        } else {
            ((HollowSetWriteRecord) arrayRec).addElement(elementOrdinal);
        }

        token = parser.nextToken();
    }

    return stateEngine.add(arrayType, arrayRec);
}

---

From source file:com.adobe.communities.ugc.migration.importer.UGCImportHelper.java

public void importQnaContent(final JsonParser jsonParser, final Resource resource,
        final ResourceResolver resolver) throws ServletException, IOException {
    if (jsonParser.getCurrentToken().equals(JsonToken.START_OBJECT)) {
        jsonParser.nextToken(); // advance to first key in the object - should be the id value of the old post
        while (jsonParser.getCurrentToken().equals(JsonToken.FIELD_NAME)) {
            extractTopic(jsonParser, resource, resolver, qnaForumOperations);
            jsonParser.nextToken(); // get the next token - presumably a field name for the next post
        }//from w  ww  . ja  v a 2 s  .com
        jsonParser.nextToken(); // skip end token
    } else {
        throw new IOException("Improperly formed JSON - expected an OBJECT_START token, but got "
                + jsonParser.getCurrentToken().toString());
    }
}

---

From source file:de.undercouch.bson4jackson.BsonParser.java

/**
 * Can be called when a new embedded document is found. Reads the
 * document's header and creates a new context on the stack.
 * @param array true if the document is an embedded array
 * @return the json token read// w  w w  .  ja v  a2 s  .co m
 * @throws IOException if an I/O error occurs
 */
protected JsonToken handleNewDocument(boolean array) throws IOException {
    if (_in == null) {
        //this means Feature.HONOR_DOCUMENT_LENGTH is enabled, and we
        //haven't yet started reading. Read the first int to find out the
        //length of the document.
        byte[] buf = new byte[Integer.SIZE / Byte.SIZE];
        int len = 0;
        while (len < buf.length) {
            int l = _rawInputStream.read(buf, len, buf.length - len);
            if (l == -1) {
                throw new IOException("Not enough bytes for length of document");
            }
            len += l;
        }

        //wrap the input stream by a bounded stream, subtract buf.length from the
        //length because the size itself is included in the length
        int documentLength = ByteBuffer.wrap(buf).order(ByteOrder.LITTLE_ENDIAN).getInt();
        InputStream in = new BoundedInputStream(_rawInputStream, documentLength - buf.length);

        //buffer if the raw input stream is not already buffered
        if (!(_rawInputStream instanceof BufferedInputStream)) {
            in = new StaticBufferedInputStream(in);
        }
        _counter = new CountingInputStream(in);
        _in = new LittleEndianInputStream(_counter);
    } else {
        //read document header (skip size, we're not interested)
        _in.readInt();
    }

    _currentContext = new Context(_currentContext, array);
    return (array ? JsonToken.START_ARRAY : JsonToken.START_OBJECT);
}

---

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  w w .j a va 2  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(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:de.undercouch.bson4jackson.BsonParserTest.java

/**
 * Checks if the parser returns a textual representation of arbitrary
 * tokens. See issue #23./*  ww w  . ja v  a  2 s  .c  om*/
 * @throws Exception if something went wrong
 */
@Test
public void parseAsText() throws Exception {
    BSONObject o = new BasicBSONObject();
    o.put("Float", 5.0f);
    o.put("Int32", 1234);
    BSONEncoder enc = new BasicBSONEncoder();
    byte[] b = enc.encode(o);

    ByteArrayInputStream bais = new ByteArrayInputStream(b);
    BsonFactory fac = new BsonFactory();
    BsonParser dec = fac.createParser(bais);

    assertEquals(JsonToken.START_OBJECT, dec.nextToken());

    assertEquals(JsonToken.FIELD_NAME, dec.nextToken());
    assertEquals("Float", dec.getCurrentName());
    assertEquals(JsonToken.VALUE_NUMBER_FLOAT, dec.nextToken());
    assertEquals(5.0f, dec.getFloatValue(), 0.00001);
    assertEquals("5.0", dec.getText());

    assertEquals(JsonToken.FIELD_NAME, dec.nextToken());
    assertEquals("Int32", dec.getCurrentName());
    assertEquals(JsonToken.VALUE_NUMBER_INT, dec.nextToken());
    assertEquals(1234, dec.getIntValue());
    assertEquals("1234", dec.getText());

    assertEquals(JsonToken.END_OBJECT, dec.nextToken());
}

---

From source file:com.netflix.hollow.jsonadapter.HollowJsonAdapter.java

private int addStructuredMap(JsonParser parser, String mapTypeName, HollowMapWriteRecord mapRec)
        throws IOException {
    JsonToken token = parser.nextToken();
    mapRec.reset();/* www.  j av  a2s  .c o m*/

    HollowMapSchema schema = (HollowMapSchema) hollowSchemas.get(mapTypeName);

    while (token != JsonToken.END_ARRAY) {
        if (token == JsonToken.START_OBJECT) {
            int keyOrdinal = -1, valueOrdinal = -1;
            while (token != JsonToken.END_OBJECT) {

                if (token == JsonToken.START_OBJECT || token == JsonToken.START_ARRAY) {
                    if ("key".equals(parser.getCurrentName()))
                        keyOrdinal = parseSubType(parser, token, schema.getKeyType());
                    else if ("value".equals(parser.getCurrentName()))
                        valueOrdinal = parseSubType(parser, token, schema.getValueType());
                }

                token = parser.nextToken();
            }

            mapRec.addEntry(keyOrdinal, valueOrdinal);
        }

        token = parser.nextToken();
    }

    return stateEngine.add(schema.getName(), mapRec);
}

---

From source file:com.adobe.communities.ugc.migration.importer.UGCImportHelper.java

public void importForumContent(final JsonParser jsonParser, final Resource resource,
        final ResourceResolver resolver) throws ServletException, IOException {
    if (jsonParser.getCurrentToken().equals(JsonToken.START_OBJECT)) {
        jsonParser.nextToken(); // advance to first key in the object - should be the id value of the old post
        while (jsonParser.getCurrentToken().equals(JsonToken.FIELD_NAME)) {
            extractTopic(jsonParser, resource, resolver, forumOperations);
            jsonParser.nextToken(); // get the next token - presumably a field name for the next post
        }/* w w  w .j av a  2 s . c om*/
        jsonParser.nextToken(); // skip end token
    } else {
        throw new IOException("Improperly formed JSON - expected an OBJECT_START token, but got "
                + jsonParser.getCurrentToken().toString());
    }
}

---

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