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

List of usage examples for com.fasterxml.jackson.core JsonParser nextToken

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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:net.nullschool.grains.jackson.datatype.GrainDeserializer.java

@Override
public Grain deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
    JsonToken token = jp.getCurrentToken();
    if (token == JsonToken.START_OBJECT) {
        token = jp.nextToken();
    } else if (token != JsonToken.FIELD_NAME) {
        throw ctxt.mappingException(getValueClass());
    }//from   w  ww  .jav  a  2  s.  c  om

    if (token == JsonToken.END_OBJECT) {
        return factory.getDefaultValue();
    }

    GrainBuilder builder = factory.getNewBuilder();

    do {
        String key = jp.getCurrentName();
        PropertyReader reader = readers.get(key);
        token = jp.nextToken();
        Object value;
        if (token == JsonToken.VALUE_NULL) {
            value = null;
        } else if (reader != null) {
            value = reader.deserializer.deserialize(jp, ctxt);
        } else {
            switch (token) {
            case START_ARRAY:
                value = extArrayDeserializer.deserialize(jp, ctxt);
                break;
            case START_OBJECT:
                value = extObjectDeserializer.deserialize(jp, ctxt);
                break;
            default:
                value = extValueDeserializer.deserialize(jp, ctxt);
            }
        }

        builder.put(key, value);
    } while (jp.nextToken() == JsonToken.FIELD_NAME);

    return builder.build();
}

From source file:org.springframework.data.couchbase.core.convert.translation.JacksonTranslationService.java

/**
 * Decode a JSON string into the {@link CouchbaseStorable} structure.
 *
 * @param source the source formatted document.
 * @param target the target of the populated data.
 *
 * @return the decoded structure./*from   w ww. j  a va 2s.com*/
 */
@Override
public final CouchbaseStorable decode(final Object source, final CouchbaseStorable target) {
    try {
        JsonParser parser = factory.createParser((String) source);
        while (parser.nextToken() != null) {
            JsonToken currentToken = parser.getCurrentToken();

            if (currentToken == JsonToken.START_OBJECT) {
                return decodeObject(parser, (CouchbaseDocument) target);
            } else if (currentToken == JsonToken.START_ARRAY) {
                return decodeArray(parser, new CouchbaseList());
            } else {
                throw new MappingException("JSON to decode needs to start as array or object!");
            }
        }
        parser.close();
    } catch (IOException ex) {
        throw new RuntimeException("Could not decode JSON", ex);
    }
    return target;
}

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

@Test
public void testSafeUInt64DecodeMaxUInt64() throws IOException {
    JsonParser p = f.createParser("\"18446744073709551615\"");
    p.nextToken();
    assertEquals(-1L, JsonValueHandler.UINT64_SAFE.readValue(p).longValue());
}

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

@Test
public void testNested1() throws IOException {
    JsonParser p = new JsonFactory()
            .createParser("{\"a\":{\"c\":2, \"$type\":\"y\", \"d\":2.1}, \"$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);
    assertEquals(JsonToken.START_OBJECT, p2.nextToken());
    // start nested object
    p2.nextToken(); // FIELD_NAME
    assertEquals("y", p2.findType());
    assertNextField("c", p2);
    assertNextIntValue(2, p2);//ww w  .  j a  v a2s.com
    assertNextField("d", p2);
    assertNextFloatValue(2.1, p2);
    assertEquals(JsonToken.END_OBJECT, p2.nextToken());
    // end nested object

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

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

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

@Test
public void testNested2() throws IOException {
    JsonParser p = new JsonFactory()
            .createParser("{\"a\":{\"c\":2, \"d\":2.1, \"$type\":\"y\"}, \"$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);
    assertEquals(JsonToken.START_OBJECT, p2.nextToken());
    // start nested object
    p2.nextToken(); // FIELD_NAME
    assertEquals("y", p2.findType());
    assertNextField("c", p2);
    assertNextIntValue(2, p2);//  ww w.  j  a v a  2  s  .  com
    assertNextField("d", p2);
    assertNextFloatValue(2.1, p2);
    assertEquals(JsonToken.END_OBJECT, p2.nextToken());
    // end nested object

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

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

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

@Test
public void testNested3() throws IOException {
    JsonParser p = new JsonFactory()
            .createParser("{\"a\":{\"$type\":\"y\", \"c\":2, \"d\":2.1}, \"$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);
    assertEquals(JsonToken.START_OBJECT, p2.nextToken());
    // start nested object
    p2.nextToken(); // FIELD_NAME
    assertEquals("y", p2.findType());
    assertNextField("c", p2);
    assertNextIntValue(2, p2);/*from w  ww .  ja  v  a  2  s.  com*/
    assertNextField("d", p2);
    assertNextFloatValue(2.1, p2);
    assertEquals(JsonToken.END_OBJECT, p2.nextToken());
    // end nested object

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

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

From source file:com.msopentech.odatajclient.engine.data.metadata.edm.v4.NavigationPropertyDeserializer.java

@Override
protected NavigationProperty doDeserialize(final JsonParser jp, final DeserializationContext ctxt)
        throws IOException, JsonProcessingException {

    final NavigationProperty property = new NavigationProperty();

    for (; jp.getCurrentToken() != JsonToken.END_OBJECT; jp.nextToken()) {
        final JsonToken token = jp.getCurrentToken();
        if (token == JsonToken.FIELD_NAME) {
            if ("Name".equals(jp.getCurrentName())) {
                property.setName(jp.nextTextValue());
            } else if ("Type".equals(jp.getCurrentName())) {
                property.setType(jp.nextTextValue());
            } else if ("Nullable".equals(jp.getCurrentName())) {
                property.setNullable(BooleanUtils.toBoolean(jp.nextTextValue()));
            } else if ("Partner".equals(jp.getCurrentName())) {
                property.setPartner(jp.nextTextValue());
            } else if ("ContainsTarget".equals(jp.getCurrentName())) {
                property.setContainsTarget(BooleanUtils.toBoolean(jp.nextTextValue()));
            } else if ("ReferentialConstraint".equals(jp.getCurrentName())) {
                jp.nextToken();//ww  w. j a v  a2s  . c  o m
                property.getReferentialConstraints()
                        .add(jp.getCodec().readValue(jp, ReferentialConstraint.class));
            } else if ("OnDelete".equals(jp.getCurrentName())) {
                jp.nextToken();
                property.setOnDelete(jp.getCodec().readValue(jp, OnDelete.class));
            } else if ("Annotation".equals(jp.getCurrentName())) {
                jp.nextToken();
                property.setAnnotation(jp.getCodec().readValue(jp, Annotation.class));
            }
        }
    }

    return property;
}

From source file:com.redhat.red.build.koji.model.json.util.MavenGAVDeserializer.java

@Override
public SimpleProjectVersionRef deserialize(JsonParser jp, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {
    String g = null;//from  ww w.j a va2s. c  o m
    String a = null;
    String v = null;

    JsonToken token = null;
    while ((token = jp.nextToken()) != JsonToken.END_OBJECT) {
        if (token == JsonToken.VALUE_STRING) {
            String field = jp.getCurrentName();
            switch (field) {
            case ("group_id"): {
                g = jp.getText();
                break;
            }
            case ("artifact_id"): {
                a = jp.getText();
                break;
            }
            case ("version"): {
                v = jp.getText();
                break;
            }
            default: {
                Logger logger = LoggerFactory.getLogger(getClass());
                logger.debug("Ignoring unknown field: {}", field);
            }
            }
        }
    }

    if (isEmpty(g) || isEmpty(a) || isEmpty(v)) {
        throw new KojiJsonException("Invalid GAV: " + g + ":" + a + ":" + v);
    }

    return new SimpleProjectVersionRef(g, a, v);
}

From source file:javaslang.jackson.datatype.deserialize.TupleDeserializer.java

@Override
public Tuple deserialize(JsonParser p, DeserializationContext ctxt)
        throws IOException, JsonProcessingException {
    List<Object> list = new ArrayList<>();
    int ptr = 0;/*from   w  ww  .  ja  va  2 s  .  com*/

    for (JsonToken jsonToken = p.nextToken(); jsonToken != END_ARRAY; jsonToken = p.nextToken()) {
        if (ptr >= deserializersCount()) {
            throw ctxt.mappingException(javaType.getRawClass());
        }
        JsonDeserializer<?> deserializer = deserializer(ptr++);
        Object value = (jsonToken != VALUE_NULL) ? deserializer.deserialize(p, ctxt)
                : deserializer.getNullValue(ctxt);
        list.add(value);
    }
    return create(list, ctxt);
}

From source file:nl.talsmasoftware.enumerables.support.json.jackson2.EnumerableDeserializer.java

private Enumerable parseObject(JsonParser jp, Class<? extends Enumerable> type) throws IOException {
    Enumerable value = null;//  ww  w  .j  a v  a2 s .  c  om
    while (true) {
        final JsonToken nextToken = jp.nextToken();
        if (nextToken == null)
            throw new IllegalStateException("JSON stream ended while parsing an Enumerable object.");

        switch (nextToken) {
        case VALUE_NULL:
        case VALUE_STRING:
            if (value == null && "value".equals(jp.getCurrentName())) {
                value = Enumerable.parse(type, jp.getText());
            }
            break;
        case END_OBJECT:
            jp.clearCurrentToken();
            if (value == null)
                throw new IllegalStateException(
                        "Attribute \"value\" is required to parse an Enumerable JSON object.");
            return value;
        case START_ARRAY:
        case START_OBJECT:
            jp.skipChildren();
            jp.clearCurrentToken();
            break;
        }
    }
}