Example usage for com.google.gson.stream JsonReader nextString

List of usage examples for com.google.gson.stream JsonReader nextString

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Introduction

In this page you can find the example usage for com.google.gson.stream JsonReader nextString.

Prototype

public String nextString() throws IOException

Source Link

Document

Returns the com.google.gson.stream.JsonToken#STRING string value of the next token, consuming it.

Usage

From source file:org.apache.airavata.workflow.core.parser.JsonWorkflowParser.java

License:Apache License

private List<InPort> readApplicationInputs(JsonReader jsonReader) throws IOException, ParserException {
    List<InPort> inPorts = new ArrayList<>();
    JsonToken peek = jsonReader.peek();//from  w w  w . jav  a  2  s.  c om
    PortModel portModel;
    InPort inPort;
    String name;
    if (peek == JsonToken.NULL) {
        jsonReader.nextNull();
    } else if (peek == JsonToken.BEGIN_ARRAY) {
        jsonReader.beginArray();
        while (jsonReader.hasNext()) {
            portModel = new PortModel();
            inPort = new InputPortIml(portModel);
            jsonReader.beginObject();
            while (jsonReader.hasNext()) {
                name = jsonReader.nextName();
                if (name.equals(NAME)) {
                    portModel.setName(jsonReader.nextString());
                } else if (name.equals(ID)) {
                    portModel.setPortId(jsonReader.nextString());
                } else if (name.equals(DATATYPE)) {
                    jsonReader.skipValue();
                } else if (name.equals(DEFAULT_VALUE)) {
                    inPort.setDefaultValue(jsonReader.nextString());
                } else if (name.equals(DESCRIPTION)) {
                    portModel.setDescription(jsonReader.nextString());
                } else {
                    jsonReader.skipValue();
                }
            }
            jsonReader.endObject();
            inPorts.add(inPort);
        }
        jsonReader.endArray();
    } else {
        throw new ParserException(
                "Error! reading application inputs, expected " + getTokenString(JsonToken.NULL) + " or "
                        + getTokenString(JsonToken.BEGIN_ARRAY) + " but found " + getTokenString(peek));
    }

    return inPorts;
}

From source file:org.apache.airavata.workflow.core.parser.JsonWorkflowParser.java

License:Apache License

private List<OutPort> readApplicationOutputs(JsonReader jsonReader) throws IOException, ParserException {
    List<OutPort> outPorts = new ArrayList<>();
    PortModel portModel;//from   w w w .java 2  s  .c  om
    OutPort outPort;
    String name;
    JsonToken peek = jsonReader.peek();
    if (peek == JsonToken.NULL) {
        jsonReader.nextNull();
    } else if (peek == JsonToken.BEGIN_ARRAY) {
        jsonReader.beginArray();
        while (jsonReader.hasNext()) {
            portModel = new PortModel();
            outPort = new OutPortImpl(portModel);
            jsonReader.beginObject();
            while (jsonReader.hasNext()) {
                name = jsonReader.nextName();
                if (name.equals(NAME)) {
                    portModel.setName(jsonReader.nextString());
                } else if (name.equals(ID)) {
                    portModel.setPortId(jsonReader.nextString());
                } else if (name.equals(DATATYPE)) {
                    jsonReader.skipValue();
                } else if (name.equals(DEFAULT_VALUE)) {
                    jsonReader.skipValue(); // can output has default values?
                } else if (name.equals(DESCRIPTION)) {
                    portModel.setDescription(jsonReader.nextString());
                } else {
                    jsonReader.skipValue();
                }
            }
            jsonReader.endObject();
            outPorts.add(outPort);
        }
        jsonReader.endArray();
    } else {
        throw new ParserException(
                "Error! reading application outputs, expected " + getTokenString(JsonToken.NULL) + " or "
                        + getTokenString(JsonToken.BEGIN_ARRAY) + " but found " + getTokenString(peek));

    }
    return outPorts;
}

From source file:org.apache.ambari.view.hive.resources.uploads.parsers.json.JSONIterator.java

License:Apache License

private LinkedHashMap<String, String> readNextObject(JsonReader reader)
        throws IOException, EndOfDocumentException {
    LinkedHashMap<String, String> row = new LinkedHashMap<>();
    boolean objectStarted = false;
    boolean shouldBeName = false;
    String currentName = null;//from  www  . jav  a2s  . c o m

    while (true) {
        JsonToken token = reader.peek();
        switch (token) {
        case BEGIN_ARRAY:
            throw new IllegalArgumentException("Row data cannot have an array.");
        case END_ARRAY:
            throw new EndOfDocumentException("End of Json Array document.");
        case BEGIN_OBJECT:
            if (objectStarted == true) {
                throw new IllegalArgumentException("Nested objects not supported.");
            }
            if (shouldBeName == true) {
                throw new IllegalArgumentException("name expected, got begin_object");
            }
            objectStarted = true;
            shouldBeName = true;
            reader.beginObject();
            break;
        case END_OBJECT:
            if (shouldBeName == false) {
                throw new IllegalArgumentException("value expected, got end_object");
            }
            reader.endObject();
            return row;
        case NAME:
            if (shouldBeName == false) {
                throw new IllegalArgumentException("name not expected at this point.");
            }
            shouldBeName = false;
            currentName = reader.nextName();
            break;
        case NUMBER:
        case STRING:
            if (shouldBeName == true) {
                throw new IllegalArgumentException("value not expected at this point.");
            }
            String n = reader.nextString();
            row.put(currentName, n);
            shouldBeName = true;
            break;
        case BOOLEAN:
            if (shouldBeName == true) {
                throw new IllegalArgumentException("value not expected at this point.");
            }
            String b = String.valueOf(reader.nextBoolean());
            row.put(currentName, b);
            shouldBeName = true;
            break;
        case NULL:
            if (shouldBeName == true) {
                throw new IllegalArgumentException("value not expected at this point.");
            }
            reader.nextNull();
            row.put(currentName, "");
            shouldBeName = true;
            break;
        case END_DOCUMENT:
            return row;

        default:
            throw new IllegalArgumentException(
                    "Illegal token detected inside json: token : " + token.toString());
        }
    }
}

From source file:org.apache.carbondata.core.metadata.datatype.DataTypeAdapter.java

License:Apache License

@Override
public Object read(JsonReader jsonReader) throws IOException {
    JsonToken token = jsonReader.peek();
    if (token == JsonToken.STRING) {
        return DataTypeUtil.valueOf(jsonReader.nextString());
    } else {//from  ww  w  .  j ava  2  s  .  c o m
        // use original deserializer logic
        return fallBack_original.fromJson(jsonReader, DataType.class);
    }
}

From source file:org.apache.carbondata.sdk.file.Schema.java

License:Apache License

/**
 * Create a Schema using JSON string, for example:
 * [//from  w  ww  . j a va  2  s  .  co m
 *   {"name":"string"},
 *   {"age":"int"}
 * ]
 * @param json specified as string
 * @return Schema
 */
public static Schema parseJson(String json) {
    GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.registerTypeAdapter(Field.class, new TypeAdapter<Field>() {
        @Override
        public void write(JsonWriter out, Field field) throws IOException {
            // noop
        }

        @Override
        public Field read(JsonReader in) throws IOException {
            in.beginObject();
            Field field = new Field(in.nextName(), in.nextString());
            in.endObject();
            return field;
        }
    });

    Field[] fields = gsonBuilder.create().fromJson(json, Field[].class);
    return new Schema(fields);
}

From source file:org.apache.hadoop.fs.http.client.FileStatus.java

License:Apache License

public static TypeAdapter adapter() {
    return new TypeAdapter<FileStatus>() {
        @Override/*from   ww w  . j  a v a 2s  . c  o m*/
        public void write(JsonWriter out, FileStatus value) throws IOException {
            /* not implemented */
        }

        @Override
        public FileStatus read(JsonReader in) throws IOException {
            FileStatus instance = null;
            in.setLenient(true);

            if (in.peek() == JsonToken.BEGIN_OBJECT) {
                in.beginObject();

                if (in.nextName().equalsIgnoreCase("FileStatus")) {
                    String name;
                    in.beginObject();
                    instance = new FileStatus();

                    while (in.hasNext()) {
                        name = in.nextName();

                        if (name.equalsIgnoreCase("accessTime")) {
                            instance.accessTime = in.nextLong();
                        } else if (name.equalsIgnoreCase("blockSize")) {
                            instance.blockSize = in.nextInt();
                        } else if (name.equalsIgnoreCase("length")) {
                            instance.length = in.nextLong();
                        } else if (name.equalsIgnoreCase("modificationTime")) {
                            instance.modTime = in.nextLong();
                        } else if (name.equalsIgnoreCase("replication")) {
                            instance.replication = in.nextInt();
                        } else if (name.equalsIgnoreCase("group")) {
                            instance.group = in.nextString();
                        } else if (name.equalsIgnoreCase("owner")) {
                            instance.owner = in.nextString();
                        } else if (name.equalsIgnoreCase("pathSuffix")) {
                            instance.suffix = in.nextString();
                        } else if (name.equalsIgnoreCase("permission")) {
                            instance.permission = in.nextString();
                        } else if (name.equalsIgnoreCase("type")) {
                            instance.type = FileType.valueOf(in.nextString());
                        }
                    }

                    in.endObject();
                }

                in.endObject();
            }
            return instance;
        }
    };
}

From source file:org.apache.olingo.odata2.core.ep.consumer.JsonErrorDocumentConsumer.java

License:Apache License

private void parseInnerError(final JsonReader reader, final ODataErrorContext errorContext) throws IOException {
    JsonToken token = reader.peek();//  ww w  . j ava2s  . c o  m
    if (token == JsonToken.STRING) {
        // implementation for parse content as provided by JsonErrorDocumentProducer
        String innerError = reader.nextString();
        errorContext.setInnerError(innerError);
    } else if (token == JsonToken.BEGIN_OBJECT) {
        // implementation for OData v2 Section 2.2.8.1.2 JSON Error Response
        // (RFC4627 Section 2.2 -> https://www.ietf.org/rfc/rfc4627.txt))
        // currently partial provided
        errorContext.setInnerError(readJson(reader));
    }
}

From source file:org.apache.olingo.odata2.core.ep.consumer.JsonErrorDocumentConsumer.java

License:Apache License

private String readJson(final JsonReader reader) throws IOException {
    StringBuilder sb = new StringBuilder();

    while (reader.hasNext()) {
        JsonToken token = reader.peek();
        if (token == JsonToken.NAME) {
            if (sb.length() > 0) {
                sb.append(",");
            }//from  ww w  . j ava 2s . co  m
            String name = reader.nextName();
            sb.append("\"").append(name).append("\"").append(":");
        } else if (token == JsonToken.BEGIN_OBJECT) {
            reader.beginObject();
            sb.append("{").append(readJson(reader)).append("}");
            reader.endObject();
        } else if (token == JsonToken.BEGIN_ARRAY) {
            reader.beginArray();
            sb.append("[").append(readJson(reader)).append("]");
            reader.endArray();
        } else {
            sb.append("\"").append(reader.nextString()).append("\"");
        }
    }

    return sb.toString();
}

From source file:org.apache.olingo.odata2.core.ep.consumer.JsonErrorDocumentConsumer.java

License:Apache License

/**
 * Read the string value from the JsonReader or 'null' if no value is available.
 * //from   w ww. j  av a 2s.  c o  m
 * @param reader to read from
 * @return the string value or 'null'
 * @throws IOException if an exception occurs
 */
private String getValue(final JsonReader reader) throws IOException {
    JsonToken token = reader.peek();
    if (JsonToken.NULL == token) {
        reader.skipValue();
        return null;
    }
    return reader.nextString();
}

From source file:org.apache.olingo.odata2.core.ep.consumer.JsonPropertyConsumer.java

License:Apache License

private Object readSimpleProperty(final JsonReader reader, final EntityPropertyInfo entityPropertyInfo,
        final Object typeMapping, final EntityProviderReadProperties readProperties)
        throws EdmException, EntityProviderException, IOException {
    final EdmSimpleType type = (EdmSimpleType) entityPropertyInfo.getType();
    Object value = null;//from w  w w . j  av a2 s.  c  o m
    final JsonToken tokenType = reader.peek();
    if (tokenType == JsonToken.NULL) {
        reader.nextNull();
    } else {
        switch (EdmSimpleTypeKind.valueOf(type.getName())) {
        case Boolean:
            if (tokenType == JsonToken.BOOLEAN) {
                value = reader.nextBoolean();
                value = value.toString();
            } else {
                throw new EntityProviderException(EntityProviderException.INVALID_PROPERTY_VALUE
                        .addContent(entityPropertyInfo.getName()));
            }
            break;
        case Byte:
        case SByte:
        case Int16:
        case Int32:
            if (tokenType == JsonToken.NUMBER) {
                value = reader.nextInt();
                value = value.toString();
            } else {
                throw new EntityProviderException(EntityProviderException.INVALID_PROPERTY_VALUE
                        .addContent(entityPropertyInfo.getName()));
            }
            break;
        case Single:
        case Double:
            if (tokenType == JsonToken.STRING) {
                value = reader.nextString();
            } else if (tokenType == JsonToken.NUMBER) {
                value = reader.nextDouble();
                value = value.toString();
            } else {
                throw new EntityProviderException(EntityProviderException.INVALID_PROPERTY_VALUE
                        .addContent(entityPropertyInfo.getName()));
            }
            break;
        default:
            if (tokenType == JsonToken.STRING) {
                value = reader.nextString();
            } else {
                throw new EntityProviderException(EntityProviderException.INVALID_PROPERTY_VALUE
                        .addContent(entityPropertyInfo.getName()));
            }
            break;
        }
    }

    final Class<?> typeMappingClass = typeMapping == null ? type.getDefaultType() : (Class<?>) typeMapping;
    final EdmFacets facets = readProperties == null || readProperties.isValidatingFacets()
            ? entityPropertyInfo.getFacets()
            : null;
    return type.valueOfString((String) value, EdmLiteralKind.JSON, facets, typeMappingClass);
}