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

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:co.cask.common.internal.io.SchemaTypeAdapter.java

License:Apache License

/**
 * Reads json value and convert it into {@link Schema} object.
 *
 * @param reader Source of json//  w ww. j  a  va  2s.  c o m
 * @param knownRecords Set of record name already encountered during the reading.
 * @return A {@link Schema} reflecting the json.
 * @throws java.io.IOException Any error during reading.
 */
private Schema read(JsonReader reader, Set<String> knownRecords) throws IOException {
    JsonToken token = reader.peek();
    switch (token) {
    case NULL:
        return null;
    case STRING: {
        // Simple type or know record type
        String name = reader.nextString();
        if (knownRecords.contains(name)) {
            return Schema.recordOf(name);
        }
        return Schema.of(Schema.Type.valueOf(name.toUpperCase()));
    }
    case BEGIN_ARRAY:
        // Union type
        return readUnion(reader, knownRecords);
    case BEGIN_OBJECT: {
        reader.beginObject();
        String name = reader.nextName();
        if (!"type".equals(name)) {
            throw new IOException("Property \"type\" missing.");
        }
        Schema.Type schemaType = Schema.Type.valueOf(reader.nextString().toUpperCase());

        Schema schema;
        switch (schemaType) {
        case ENUM:
            schema = readEnum(reader);
            break;
        case ARRAY:
            schema = readArray(reader, knownRecords);
            break;
        case MAP:
            schema = readMap(reader, knownRecords);
            break;
        case RECORD:
            schema = readRecord(reader, knownRecords);
            break;
        default:
            schema = Schema.of(schemaType);
        }
        reader.endObject();
        return schema;
    }
    }
    throw new IOException("Malformed schema input.");
}

From source file:co.cask.common.internal.io.SchemaTypeAdapter.java

License:Apache License

/**
 * Constructs {@link Schema.Type#ENUM ENUM} type schema from the json input.
 *
 * @param reader The {@link JsonReader} for streaming json input tokens.
 * @return A {@link Schema} of type {@link Schema.Type#ENUM ENUM}.
 * @throws java.io.IOException When fails to construct a valid schema from the input.
 *//*  w  w w . java2s.com*/
private Schema readEnum(JsonReader reader) throws IOException {
    if (!"symbols".equals(reader.nextName())) {
        throw new IOException("Property \"symbols\" missing for enum.");
    }
    ImmutableList.Builder<String> enumValues = ImmutableList.builder();
    reader.beginArray();
    while (reader.peek() != JsonToken.END_ARRAY) {
        enumValues.add(reader.nextString());
    }
    reader.endArray();
    return Schema.enumWith(enumValues.build());
}

From source file:co.cask.common.internal.io.SchemaTypeAdapter.java

License:Apache License

/**
 * Constructs {@link Schema.Type#RECORD RECORD} type schema from the json input.
 *
 * @param reader The {@link JsonReader} for streaming json input tokens.
 * @param knownRecords Set of record name already encountered during the reading.
 * @return A {@link Schema} of type {@link Schema.Type#RECORD RECORD}.
 * @throws java.io.IOException When fails to construct a valid schema from the input.
 *//*from w  w w .jav a 2 s.  c om*/
private Schema readRecord(JsonReader reader, Set<String> knownRecords) throws IOException {
    if (!"name".equals(reader.nextName())) {
        throw new IOException("Property \"name\" missing for record.");
    }

    String recordName = reader.nextString();

    // Read in fields schemas
    if (!"fields".equals(reader.nextName())) {
        throw new IOException("Property \"fields\" missing for record.");
    }

    knownRecords.add(recordName);

    ImmutableList.Builder<Schema.Field> fieldBuilder = ImmutableList.builder();
    reader.beginArray();
    while (reader.peek() != JsonToken.END_ARRAY) {
        reader.beginObject();
        if (!"name".equals(reader.nextName())) {
            throw new IOException("Property \"name\" missing for record field.");
        }
        String fieldName = reader.nextString();
        fieldBuilder.add(Schema.Field.of(fieldName, readInnerSchema(reader, "type", knownRecords)));
        reader.endObject();
    }
    reader.endArray();
    return Schema.recordOf(recordName, fieldBuilder.build());
}

From source file:co.forsaken.projectindigo.utils.mojangtokens.EnumTypeAdapterFactory.java

License:Open Source License

@SuppressWarnings("unchecked")
@Override/*from w  w  w .  j  a va 2s.c o  m*/
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    if (!type.getRawType().isEnum()) {
        return null;
    }
    final Map<String, T> map = new HashMap<String, T>();
    for (T c : (T[]) type.getRawType().getEnumConstants()) {
        map.put(c.toString().toLowerCase(Locale.US), c);
    }

    return new TypeAdapter<T>() {
        @Override
        public T read(JsonReader reader) throws IOException {
            if (reader.peek() == JsonToken.NULL) {
                reader.nextNull();
                return null;
            }
            String name = reader.nextString();
            if (name == null) {
                return null;
            }
            return map.get(name.toLowerCase(Locale.US));
        }

        @Override
        public void write(JsonWriter writer, T value) throws IOException {
            if (value == null) {
                writer.nullValue();
            } else {
                writer.value(value.toString().toLowerCase(Locale.US));
            }
        }
    };
}

From source file:co.forsaken.projectindigo.utils.mojangtokens.FileTypeAdapter.java

License:Open Source License

@Override
public File read(JsonReader json) throws IOException {
    if (json.hasNext()) {
        String value = json.nextString();
        return value == null ? null : new File(value);
    }/*from w  ww. j  a  va  2 s  .  co  m*/
    return null;
}

From source file:com.actimem.blog.gson.custometypeannotation.CompanyIdTypeAdapter.java

License:Apache License

@Override
public CompanyId read(JsonReader in) throws IOException {
    return new CompanyId(in.nextString());
}

From source file:com.actimem.blog.gson.custometypeannotation.DateTimeTypeAdapter.java

License:Apache License

@Override
public DateTime read(JsonReader in) throws IOException {
    return new DateTime(in.nextString());
}

From source file:com.aelitis.azureus.util.ObjectTypeAdapterLong.java

License:Apache License

@Override
public Object read(JsonReader in) throws IOException {
    JsonToken token = in.peek();/*  w  w  w .  j  a  va  2 s .c  om*/
    switch (token) {
    case BEGIN_ARRAY:
        List<Object> list = new ArrayList<Object>();
        in.beginArray();
        while (in.hasNext()) {
            list.add(read(in));
        }
        in.endArray();
        return list;

    case BEGIN_OBJECT:
        Map<String, Object> map = new LinkedTreeMap<String, Object>();
        in.beginObject();
        while (in.hasNext()) {
            map.put(in.nextName(), read(in));
        }
        in.endObject();
        return map;

    case STRING:
        return in.nextString();

    case NUMBER: {
        String value = in.nextString();
        if (value.indexOf('.') >= 0) {
            return Double.parseDouble(value);
        } else {
            return Long.parseLong(value);
        }
    }

    case BOOLEAN:
        return in.nextBoolean();

    case NULL:
        in.nextNull();
        return null;

    default:
        throw new IllegalStateException();
    }
}

From source file:com.aliyun.openservices.odps.console.common.JobDetailInfo.java

License:Apache License

private List<FuxiJob> loadJobsFromStream(InputStream in) throws ODPSConsoleException {
    boolean debug = true;
    ArrayList<FuxiJob> jobs = new ArrayList<FuxiJob>();
    if (debug) {//  ww  w  .  jav a 2s .c o m
        try {
            JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
            reader.beginObject();
            while (reader.hasNext()) {
                String name = reader.nextName();
                if (name.equals("mapReduce")) {
                    reader.beginObject();
                    while (reader.hasNext()) {
                        String nameInMapReduce = reader.nextName();
                        if (nameInMapReduce.equals("jobs")) {
                            reader.beginArray();
                            while (reader.hasNext()) {
                                jobs.add(getFuxiJobFromJson(reader));
                            }
                            reader.endArray();
                        } else if (nameInMapReduce.equals("jsonSummary")) {
                            getInfoFromJsonSummary(jobs, reader.nextString());
                        } else {
                            reader.skipValue();
                        }
                    }
                    reader.endObject();
                } else {
                    reader.skipValue();
                }
            }
            reader.endObject();
        } catch (IOException e) {
            e.printStackTrace();
            throw new ODPSConsoleException("Bad json format");
        }
    }

    return jobs;
}

From source file:com.aliyun.openservices.odps.console.common.JobDetailInfo.java

License:Apache License

private FuxiJob getFuxiJobFromJson(JsonReader reader) throws IOException {
    FuxiJob job = new FuxiJob();

    reader.beginObject();/*  w  w w  . j a v  a  2 s .c  o m*/
    while (reader.hasNext()) {
        String nameInJob = reader.nextName();
        if (nameInJob.equals("name")) {
            job.name = reader.nextString();
        } else if (nameInJob.equals("tasks")) {
            reader.beginArray();
            job.tasks = new ArrayList<FuxiTask>();
            while (reader.hasNext()) {
                job.tasks.add(getFuxiTaskFromJson(reader));
            }
            reader.endArray();
        } else {
            reader.skipValue();
        }
    }
    reader.endObject();
    return job;
}