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

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

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Introduction

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

Prototype

public JsonToken peek() throws IOException

Source Link

Document

Returns the type of the next token without 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.  ja va  2 s  .c om*/
 * @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#UNION UNION} 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#UNION UNION}.
 * @throws java.io.IOException When fails to construct a valid schema from the input.
 *///from   www.j  a  va2s .  c om
private Schema readUnion(JsonReader reader, Set<String> knownRecords) throws IOException {
    ImmutableList.Builder<Schema> unionSchemas = ImmutableList.builder();
    reader.beginArray();
    while (reader.peek() != JsonToken.END_ARRAY) {
        unionSchemas.add(read(reader, knownRecords));
    }
    reader.endArray();
    return Schema.unionOf(unionSchemas.build());
}

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.
 *//*from   w  w w. j  a  v a 2s  . co m*/
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 ww  . jav a  2  s  . c  o  m
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 ww .  ja va2  s . 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:com.aelitis.azureus.util.ObjectTypeAdapterLong.java

License:Apache License

@Override
public Object read(JsonReader in) throws IOException {
    JsonToken token = in.peek();
    switch (token) {
    case BEGIN_ARRAY:
        List<Object> list = new ArrayList<Object>();
        in.beginArray();//  w w w  .jav  a2 s.c  om
        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.android.common.ide.common.blame.MessageJsonSerializer.java

License:Apache License

@Override
public Message read(JsonReader in) throws IOException {
    in.beginObject();//from w w  w  .j  a  v a  2 s .  com
    Message.Kind kind = Message.Kind.UNKNOWN;
    String text = "";
    String rawMessage = null;
    Optional<String> toolName = Optional.absent();
    ImmutableList.Builder<SourceFilePosition> positions = new ImmutableList.Builder<SourceFilePosition>();
    SourceFile legacyFile = SourceFile.UNKNOWN;
    SourcePosition legacyPosition = SourcePosition.UNKNOWN;
    while (in.hasNext()) {
        String name = in.nextName();
        if (name.equals(KIND)) {
            //noinspection StringToUpperCaseOrToLowerCaseWithoutLocale
            Message.Kind theKind = KIND_STRING_ENUM_MAP.inverse().get(in.nextString().toLowerCase());
            kind = (theKind != null) ? theKind : Message.Kind.UNKNOWN;
        } else if (name.equals(TEXT)) {
            text = in.nextString();
        } else if (name.equals(RAW_MESSAGE)) {
            rawMessage = in.nextString();
        } else if (name.equals(TOOL_NAME)) {
            toolName = Optional.of(in.nextString());
        } else if (name.equals(SOURCE_FILE_POSITIONS)) {
            switch (in.peek()) {
            case BEGIN_ARRAY:
                in.beginArray();
                while (in.hasNext()) {
                    positions.add(mSourceFilePositionTypeAdapter.read(in));
                }
                in.endArray();
                break;
            case BEGIN_OBJECT:
                positions.add(mSourceFilePositionTypeAdapter.read(in));
                break;
            default:
                in.skipValue();
                break;
            }
        } else if (name.equals(LEGACY_SOURCE_PATH)) {
            legacyFile = new SourceFile(new File(in.nextString()));
        } else if (name.equals(LEGACY_POSITION)) {
            legacyPosition = mSourcePositionTypeAdapter.read(in);
        } else {
            in.skipValue();
        }
    }
    in.endObject();

    if (legacyFile != SourceFile.UNKNOWN || legacyPosition != SourcePosition.UNKNOWN) {
        positions.add(new SourceFilePosition(legacyFile, legacyPosition));
    }
    if (rawMessage == null) {
        rawMessage = text;
    }
    ImmutableList<SourceFilePosition> sourceFilePositions = positions.build();
    if (!sourceFilePositions.isEmpty()) {
        return new Message(kind, text, rawMessage, toolName, sourceFilePositions);
    } else {
        return new Message(kind, text, rawMessage, toolName, ImmutableList.of(SourceFilePosition.UNKNOWN));
    }
}

From source file:com.android.common.ide.common.blame.SourceFileJsonTypeAdapter.java

License:Apache License

@Override
public SourceFile read(JsonReader in) throws IOException {
    switch (in.peek()) {
    case BEGIN_OBJECT:
        in.beginObject();//from  w  w  w. j a va2  s. c o m
        String filePath = null;
        String description = null;
        while (in.hasNext()) {
            String name = in.nextName();
            if (name.equals(PATH)) {
                filePath = in.nextString();
            } else if (DESCRIPTION.equals(name)) {
                description = in.nextString();
            } else {
                in.skipValue();
            }
        }
        in.endObject();
        if (!Strings.isNullOrEmpty(filePath)) {
            File file = new File(filePath);
            if (!Strings.isNullOrEmpty(description)) {
                return new SourceFile(file, description);
            } else {
                return new SourceFile(file);
            }
        } else {
            if (!Strings.isNullOrEmpty(description)) {
                return new SourceFile(description);
            } else {
                return SourceFile.UNKNOWN;
            }
        }
    case STRING:
        String fileName = in.nextString();
        if (Strings.isNullOrEmpty(fileName)) {
            return SourceFile.UNKNOWN;
        }
        return new SourceFile(new File(fileName));
    default:
        return SourceFile.UNKNOWN;
    }

}

From source file:com.android.ide.common.blame.MergingLogPersistUtil.java

License:Apache License

@NonNull
static Map<SourceFile, Map<SourcePosition, SourceFilePosition>> loadFromMultiFile(@NonNull File folder,
        @NonNull String shard) {//from   ww  w.  j a  va 2  s.c o  m
    Map<SourceFile, Map<SourcePosition, SourceFilePosition>> map = Maps.newConcurrentMap();
    JsonReader reader;
    File file = getMultiFile(folder, shard);
    if (!file.exists()) {
        return map;
    }
    try {
        reader = new JsonReader(Files.newReader(file, Charsets.UTF_8));
    } catch (FileNotFoundException e) {
        // Shouldn't happen unless it disappears under us.
        return map;
    }
    try {
        reader.beginArray();
        while (reader.peek() != JsonToken.END_ARRAY) {
            reader.beginObject();
            SourceFile toFile = SourceFile.UNKNOWN;
            Map<SourcePosition, SourceFilePosition> innerMap = Maps.newLinkedHashMap();
            while (reader.peek() != JsonToken.END_OBJECT) {
                final String name = reader.nextName();
                if (name.equals(KEY_OUTPUT_FILE)) {
                    toFile = mSourceFileJsonTypeAdapter.read(reader);
                } else if (name.equals(KEY_MAP)) {
                    reader.beginArray();
                    while (reader.peek() != JsonToken.END_ARRAY) {
                        reader.beginObject();
                        SourceFilePosition from = null;
                        SourcePosition to = null;
                        while (reader.peek() != JsonToken.END_OBJECT) {
                            final String innerName = reader.nextName();
                            if (innerName.equals(KEY_FROM)) {
                                from = mSourceFilePositionJsonTypeAdapter.read(reader);
                            } else if (innerName.equals(KEY_TO)) {
                                to = mSourcePositionJsonTypeAdapter.read(reader);
                            } else {
                                throw new IOException(String.format("Unexpected property: %s", innerName));
                            }
                        }
                        if (from == null || to == null) {
                            throw new IOException("Each record must contain both from and to.");
                        }
                        innerMap.put(to, from);
                        reader.endObject();
                    }
                    reader.endArray();
                } else {
                    throw new IOException(String.format("Unexpected property: %s", name));
                }
            }
            map.put(toFile, innerMap);
            reader.endObject();
        }
        reader.endArray();
        return map;
    } catch (IOException e) {
        // TODO: trigger a non-incremental merge if this happens.
        throw new RuntimeException(e);
    } finally {
        try {
            reader.close();
        } catch (Throwable e2) {
            // well, we tried.
        }
    }
}

From source file:com.android.ide.common.blame.MergingLogPersistUtil.java

License:Apache License

@NonNull
static Map<SourceFile, SourceFile> loadFromSingleFile(@NonNull File folder, @NonNull String shard) {
    Map<SourceFile, SourceFile> fileMap = Maps.newConcurrentMap();
    JsonReader reader;
    File file = getSingleFile(folder, shard);
    if (!file.exists()) {
        return fileMap;
    }//  w  w w .  j av  a2  s .co  m
    try {
        reader = new JsonReader(Files.newReader(file, Charsets.UTF_8));
    } catch (FileNotFoundException e) {
        // Shouldn't happen unless it disappears under us.
        return fileMap;
    }
    try {
        reader.beginArray();
        while (reader.peek() != JsonToken.END_ARRAY) {
            reader.beginObject();
            SourceFile merged = SourceFile.UNKNOWN;
            SourceFile source = SourceFile.UNKNOWN;
            while (reader.peek() != JsonToken.END_OBJECT) {
                String name = reader.nextName();
                if (name.equals(KEY_MERGED)) {
                    merged = mSourceFileJsonTypeAdapter.read(reader);
                } else if (name.equals(KEY_SOURCE)) {
                    source = mSourceFileJsonTypeAdapter.read(reader);
                } else {
                    throw new IOException(String.format("Unexpected property: %s", name));
                }
            }
            reader.endObject();
            fileMap.put(merged, source);
        }
        reader.endArray();
        return fileMap;
    } catch (IOException e) {
        // TODO: trigger a non-incremental merge if this happens.
        throw new RuntimeException(e);
    } finally {
        try {
            reader.close();
        } catch (Throwable e) {
            // well, we tried.
        }
    }
}