Example usage for com.google.gson.stream JsonToken BEGIN

Introduction

In this page you can find the example usage for com.google.gson.stream JsonToken BEGIN_ARRAY.

Prototype

JsonToken BEGIN_ARRAY

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Document

The opening of a JSON array.

Usage

From source file:bind.JsonTreeReader.java

License:Apache License

@Override
public void beginArray() throws IOException {
    expect(JsonToken.BEGIN_ARRAY);
    JsonArray array = ((JsonElement) peekStack()).getAsJsonArray();
    stack.add(array.iterator());/*from w w w .ja  va2  s .c  om*/
}

From source file:bind.JsonTreeReader.java

License:Apache License

@Override
public JsonToken peek() throws IOException {
    if (stack.isEmpty()) {
        return JsonToken.END_DOCUMENT;
    }/*from  w w w. j a  v a 2 s  .  c  o  m*/

    Object o = peekStack();
    if (o instanceof Iterator) {
        Object secondToTop = stack.get(stack.size() - 2);
        boolean isObject = secondToTop instanceof JsonElement && ((JsonElement) secondToTop).isJsonObject();
        Iterator<?> iterator = (Iterator<?>) o;
        if (iterator.hasNext()) {
            if (isObject) {
                return JsonToken.NAME;
            } else {
                stack.add(iterator.next());
                return peek();
            }
        } else {
            return isObject ? JsonToken.END_OBJECT : JsonToken.END_ARRAY;
        }
    } else if (o instanceof JsonElement) {
        JsonElement el = (JsonElement) o;
        if (el.isJsonObject()) {
            return JsonToken.BEGIN_OBJECT;
        } else if (el.isJsonArray()) {
            return JsonToken.BEGIN_ARRAY;
        } else if (el.isJsonPrimitive()) {
            JsonPrimitive primitive = (JsonPrimitive) o;
            if (primitive.isString()) {
                return JsonToken.STRING;
            } else if (primitive.isBoolean()) {
                return JsonToken.BOOLEAN;
            } else if (primitive.isNumber()) {
                return JsonToken.NUMBER;
            } else {
                throw new AssertionError();
            }
        } else if (el.isJsonNull()) {
            return JsonToken.NULL;
        }
        throw new AssertionError();
    } else if (o == SENTINEL_CLOSED) {
        throw new IllegalStateException("JsonReader is closed");
    } else {
        throw new AssertionError();
    }
}

From source file:com.cinchapi.concourse.util.Convert.java

License:Apache License

/**
 * Takes a JSON string representation of an object or an array of JSON
 * objects and returns a list of {@link Multimap multimaps} with the
 * corresponding data. Unlike {@link #jsonToJava(String)}, this method will
 * allow the top level element to be an array in the {code json} string.
 * //  ww w  .  ja v a2s  .c  o m
 * @param json
 * @return A list of Java objects
 */
public static List<Multimap<String, Object>> anyJsonToJava(String json) {
    List<Multimap<String, Object>> result = Lists.newArrayList();
    try (JsonReader reader = new JsonReader(new StringReader(json))) {
        reader.setLenient(true);
        if (reader.peek() == JsonToken.BEGIN_ARRAY) {
            try {
                reader.beginArray();
                while (reader.peek() != JsonToken.END_ARRAY) {
                    result.add(jsonToJava(reader));
                }
                reader.endArray();
            } catch (IllegalStateException e) {
                throw new JsonParseException(e.getMessage());
            }
        } else {
            result.add(jsonToJava(reader));
        }
    } catch (IOException e) {
        throw Throwables.propagate(e);
    }
    return result;
}

From source file:com.cinchapi.concourse.util.Convert.java

License:Apache License

/**
 * Convert the next JSON object in the {@code reader} to a mapping that
 * associates each key with the Java objects that represent the
 * corresponding values./*from w w w .j a va2 s  .  c o m*/
 * 
 * <p>
 * This method has the same rules and limitations as
 * {@link #jsonToJava(String)}. It simply uses a {@link JsonReader} to
 * handle reading an array of objects.
 * </p>
 * <p>
 * <strong>This method DOES NOT {@link JsonReader#close()} the
 * {@code reader}.</strong>
 * </p>
 * 
 * @param reader the {@link JsonReader} that contains a stream of JSON
 * @return the JSON data in the form of a {@link Multimap} from keys to
 *         values
 */
private static Multimap<String, Object> jsonToJava(JsonReader reader) {
    Multimap<String, Object> data = HashMultimap.create();
    try {
        reader.beginObject();
        JsonToken peek0;
        while ((peek0 = reader.peek()) != JsonToken.END_OBJECT) {
            String key = reader.nextName();
            peek0 = reader.peek();
            if (peek0 == JsonToken.BEGIN_ARRAY) {
                // If we have an array, add the elements individually. If
                // there are any duplicates in the array, they will be
                // filtered out by virtue of the fact that a HashMultimap
                // does not store dupes.
                reader.beginArray();
                JsonToken peek = reader.peek();
                do {
                    Object value;
                    if (peek == JsonToken.BOOLEAN) {
                        value = reader.nextBoolean();
                    } else if (peek == JsonToken.NUMBER) {
                        value = stringToJava(reader.nextString());
                    } else if (peek == JsonToken.STRING) {
                        String orig = reader.nextString();
                        value = stringToJava(orig);
                        if (orig.isEmpty()) {
                            value = orig;
                        }
                        // If the token looks like a string, it MUST be
                        // converted to a Java string unless it is a
                        // masquerading double or an instance of Thrift
                        // translatable class that has a special string
                        // representation (i.e. Tag, Link)
                        else if (orig.charAt(orig.length() - 1) != 'D'
                                && !CLASSES_WITH_ENCODED_STRING_REPR.contains(value.getClass())) {
                            value = value.toString();
                        }
                    } else if (peek == JsonToken.NULL) {
                        reader.skipValue();
                        continue;
                    } else {
                        throw new JsonParseException("Cannot parse nested object or array within an array");
                    }
                    data.put(key, value);
                } while ((peek = reader.peek()) != JsonToken.END_ARRAY);
                reader.endArray();
            } else {
                Object value;
                if (peek0 == JsonToken.BOOLEAN) {
                    value = reader.nextBoolean();
                } else if (peek0 == JsonToken.NUMBER) {
                    value = stringToJava(reader.nextString());
                } else if (peek0 == JsonToken.STRING) {
                    String orig = reader.nextString();
                    value = stringToJava(orig);
                    if (orig.isEmpty()) {
                        value = orig;
                    }
                    // If the token looks like a string, it MUST be
                    // converted to a Java string unless it is a
                    // masquerading double or an instance of Thrift
                    // translatable class that has a special string
                    // representation (i.e. Tag, Link)
                    else if (orig.charAt(orig.length() - 1) != 'D'
                            && !CLASSES_WITH_ENCODED_STRING_REPR.contains(value.getClass())) {
                        value = value.toString();
                    }
                } else if (peek0 == JsonToken.NULL) {
                    reader.skipValue();
                    continue;
                } else {
                    throw new JsonParseException("Cannot parse nested object to value");
                }
                data.put(key, value);
            }
        }
        reader.endObject();
        return data;
    } catch (IOException | IllegalStateException e) {
        throw new JsonParseException(e.getMessage());
    }
}

From source file:com.ecwid.mailchimp.internal.gson.MailChimpObjectTypeAdapter.java

License:Apache License

@Override
public MailChimpObject read(JsonReader in) throws IOException {
    if (in.peek() == JsonToken.NULL) {
        in.nextNull();//from www  .ja  va2  s  . c o  m
        return null;
    }

    MailChimpObject result;
    try {
        result = constructor.newInstance();
    } catch (Exception e) {
        throw new RuntimeException("Failed to invoke " + constructor + " with no args", e);
    }

    in.beginObject();
    while (in.hasNext()) {
        final String key;
        if (in.peek() == JsonToken.NAME) {
            key = in.nextName();
        } else {
            key = in.nextString();
        }

        final Object value;

        Type valueType = result.getReflectiveMappingTypes().get(key);
        if (valueType != null) {
            value = gson.getAdapter(TypeToken.get(valueType)).read(in);
        } else {
            if (in.peek() == JsonToken.BEGIN_OBJECT) {
                value = gson.getAdapter(MailChimpObject.class).read(in);
            } else if (in.peek() == JsonToken.BEGIN_ARRAY) {
                value = readList(in);
            } else {
                value = gson.getAdapter(Object.class).read(in);
            }
        }

        if (result.put(key, value) != null) {
            throw new JsonSyntaxException("duplicate key: " + key);
        }
    }
    in.endObject();

    return result;
}

From source file:com.ecwid.mailchimp.internal.gson.MailChimpObjectTypeAdapter.java

License:Apache License

private List<?> readList(JsonReader in) throws IOException {
    List<Object> result = new ArrayList<Object>();
    in.beginArray();//from www  .  jav  a2 s  . c  om
    while (in.peek() != JsonToken.END_ARRAY) {
        final Object element;

        if (in.peek() == JsonToken.BEGIN_OBJECT) {
            element = gson.getAdapter(MailChimpObject.class).read(in);
        } else if (in.peek() == JsonToken.BEGIN_ARRAY) {
            element = readList(in);
        } else {
            element = gson.getAdapter(Object.class).read(in);
        }

        result.add(element);
    }
    in.endArray();
    return result;
}

From source file:com.esri.gpt.framework.dcat.DcatParser.java

License:Apache License

/**
 * Parses data (DOM building style).//w  w w  .ja v a  2 s  .  c o m
 *
 * @param policy limit policy
 * @return list of records.
 * @throws DcatParseException if parsing fails
 */
public DcatRecordList parse(final LimitPolicy policy) throws DcatParseException, IOException {
    final DcatRecordListImpl list = new DcatRecordListImpl();
    DcatParser.ListenerInternal listener = new DcatParser.ListenerInternal() {
        private void parse(final ListenerInternal listener) throws DcatParseException, IOException {
            if (!jsonReader.hasNext()) {
                throw new DcatParseException("No more data available.");
            }
            JsonToken token = jsonReader.peek();
            if (token != JsonToken.BEGIN_ARRAY) {
                throw new DcatParseException("No array found.");
            }

            parseRecords(listener);
        }

        @Override
        public boolean onRecord(DcatRecord record) {
            list.add(record);
            if (policy == null || list.size() >= policy.getLimit()) {
                return true;
            } else {
                policy.onLimit(list);
                return false;
            }
        }
    };
    parse(listener);
    return list;
}

From source file:com.esri.gpt.framework.dcat.DcatParser.java

License:Apache License

/**
 * Parses DCAT using internal listener./*from   ww w. j  av  a  2 s  .c  o  m*/
 *
 * @param listener internal listener
 * @throws DcatParseException if parsing DCAT fails
 */
void parse(final ListenerInternal listener) throws DcatParseException, IOException {
    if (!jsonReader.hasNext()) {
        throw new DcatParseException("No more data available.");
    }

    JsonToken token = jsonReader.peek();
    if (token != JsonToken.BEGIN_ARRAY) {
        throw new DcatParseException("No array found.");
    }
    jsonReader.beginArray();

    parseRecords(listener);
}

From source file:com.flowzr.budget.holo.export.flowzr.FlowzrSyncEngine.java

License:Open Source License

public static <T> int readMessage(JsonReader reader, String tableName, Class<T> clazz, long last_sync_ts)
        throws IOException, JSONException, Exception {
    String n = null;/* w  ww .j a v  a 2s . c o  m*/
    int i = 0;

    while (reader.hasNext()) {
        JsonToken peek = reader.peek();

        String v = null;
        if (peek == JsonToken.BEGIN_OBJECT) {
            reader.beginObject();
        } else if (peek == JsonToken.NAME) {
            n = reader.nextName();
        } else if (peek == JsonToken.BEGIN_ARRAY) {
            if (n.equals(tableName)) {
                i = readJsnArr(reader, tableName, clazz);

            } else {
                if (n.equals("params")) {
                    reader.beginArray();
                    if (reader.hasNext()) {
                        reader.beginObject();
                        if (reader.hasNext()) {
                            n = reader.nextName();
                            v = reader.nextString();
                        }
                        reader.endObject();
                    }
                    reader.endArray();
                } else {
                    reader.skipValue();
                }
            }
        } else if (peek == JsonToken.END_OBJECT) {
            reader.endObject();
        } else if (peek == JsonToken.END_ARRAY) {
            reader.endArray();
        } else if (peek == JsonToken.STRING) {
            reader.skipValue();
        } else {
            reader.skipValue();
        }
    }
    return i;
}

From source file:com.gd.misc.test.JsonReader.java

License:Apache License

/**
 * Returns the type of the next token without consuming it.
 *//* w w w.j ava  2s  .co  m*/
public JsonToken peek() throws IOException {
    int p = peeked;
    if (p == PEEKED_NONE) {
        p = doPeek();
    }

    switch (p) {
    case PEEKED_BEGIN_OBJECT:
        return JsonToken.BEGIN_OBJECT;
    case PEEKED_END_OBJECT:
        return JsonToken.END_OBJECT;
    case PEEKED_BEGIN_ARRAY:
        return JsonToken.BEGIN_ARRAY;
    case PEEKED_END_ARRAY:
        return JsonToken.END_ARRAY;
    case PEEKED_SINGLE_QUOTED_NAME:
    case PEEKED_DOUBLE_QUOTED_NAME:
    case PEEKED_UNQUOTED_NAME:
        return JsonToken.NAME;
    case PEEKED_TRUE:
    case PEEKED_FALSE:
        return JsonToken.BOOLEAN;
    case PEEKED_NULL:
        return JsonToken.NULL;
    case PEEKED_SINGLE_QUOTED:
    case PEEKED_DOUBLE_QUOTED:
    case PEEKED_UNQUOTED:
    case PEEKED_BUFFERED:
        return JsonToken.STRING;
    case PEEKED_LONG:
    case PEEKED_NUMBER:
        return JsonToken.NUMBER;
    case PEEKED_EOF:
        return JsonToken.END_DOCUMENT;
    default:
        throw new AssertionError();
    }
}

Example usage for com.google.gson.stream JsonToken BEGIN_ARRAY

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