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

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:org.sprintapi.hyperdata.gson.HyperDataTypeAdapter.java

License:Apache License

@SuppressWarnings({ "unchecked", "rawtypes" })
@Override//from  www  .j  a v  a 2s .  co  m
public Object read(JsonReader in) throws IOException {
    if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
    }

    Object instance = constructor.construct();

    BoundField metadataField = null;
    if (metadataAccess != null) {
        metadataField = boundFields.get(metadataAccess.fieldName);
    }

    Object meta = null;
    Map<String, BoundField> metaBoundFields = null;

    try {
        in.beginObject();
        while (in.hasNext()) {
            String name = in.nextName();
            if ((name != null) && (metadataField != null) && (name.startsWith(Constants.META_CHAR))) {
                if (meta == null) {
                    meta = constructorConstructor.get(metadataField.type).construct();
                    if (!Map.class.isAssignableFrom(meta.getClass())) {
                        metaBoundFields = reflectiveFactory.getBoundFields(gson, metadataField.type,
                                metadataField.type.getRawType());
                    }
                }

                if (metaBoundFields != null) {
                    BoundField field = metaBoundFields.get(name.substring(1));
                    if (field == null || !field.deserialized) {
                        in.skipValue();
                    } else {
                        field.read(in, meta);
                    }
                } else {
                    TypeAdapter<Object> ta = gson.getAdapter(Object.class);
                    Object value = ta.read(in);
                    ((Map) meta).put(name.substring(1), value);
                }

            } else if ((name != null) && (!name.equals(metadataAccess.fieldName))) {
                BoundField field = boundFields.get(name);
                if (field == null || !field.deserialized) {
                    in.skipValue();
                } else {
                    field.read(in, instance);
                }
            }
        }
        if (metadataAccess.setter != null) {
            metadataAccess.setter.invoke(instance, meta);
            //TODO
        }

    } catch (IllegalStateException e) {
        throw new JsonSyntaxException(e);
    } catch (IllegalAccessException e) {
        throw new AssertionError(e);
    } catch (IllegalArgumentException e) {
        throw new AssertionError(e);
    } catch (InvocationTargetException e) {
        throw new AssertionError(e);
    }
    in.endObject();
    return instance;
}

---

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.imported.RuntimeTypeAdapterFactory.java

License:Apache License

/**
 * Takes a reader in any state and returns the next value as a JsonElement.
 *//*from   ww w  . jav a 2s. c  om*/
private static JsonElement parse(JsonReader reader) throws JsonParseException {
    boolean isEmpty = true;
    try {
        reader.peek();
        isEmpty = false;
        return RuntimeTypeAdapterFactory.JSON_ELEMENT.read(reader);
    } catch (EOFException e) {
        /*
         * For compatibility with JSON 1.5 and earlier, we return a JsonNull for
         * empty documents instead of throwing.
         */
        if (isEmpty) {
            return JsonNull.INSTANCE;
        }
        // The stream ended prematurely so it is likely a syntax error.
        throw new JsonSyntaxException(e);
    } catch (MalformedJsonException e) {
        throw new JsonSyntaxException(e);
    } catch (IOException e) {
        throw new JsonIOException(e);
    } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
    }
}

---

From source file:org.terasology.utilities.gson.CaseInsensitiveEnumTypeAdapterFactory.java

License:Apache License

public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    Class<T> rawType = (Class<T>) type.getRawType();
    if (!rawType.isEnum()) {
        return null;
    }//from w w  w .j av a2  s .co m

    final Map<String, T> lowercaseToConstant = Maps.newHashMap();
    for (T constant : rawType.getEnumConstants()) {
        String lowercase = toLowercase(constant);
        lowercaseToConstant.put(lowercase, constant);
    }

    return new TypeAdapter<T>() {
        @Override
        public void write(JsonWriter out, T value) throws IOException {
            if (value == null) {
                out.nullValue();
            } else {
                out.value(toLowercase(value));
            }
        }

        @Override
        public T read(JsonReader reader) throws IOException {
            if (reader.peek() == JsonToken.NULL) {
                reader.nextNull();
                return null;
            } else {
                String value = reader.nextString();
                return lowercaseToConstant.get(toLowercase(value));
            }
        }
    };
}

---

From source file:org.terasology.utilities.gson.UriTypeAdapterFactory.java

License:Apache License

public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    final Class<T> rawType = (Class<T>) type.getRawType();
    if (!Uri.class.isAssignableFrom(rawType)) {
        return null;
    }/*from  w  ww  . j  a v a2  s .  c o  m*/

    final Constructor<T> constructor;
    try {
        constructor = rawType.getConstructor(String.class);
        constructor.setAccessible(true);
    } catch (NoSuchMethodException e) {
        logger.error("URI type {} lacks String constructor", rawType);
        return null;
    }

    return new TypeAdapter<T>() {
        @Override
        public void write(JsonWriter out, T value) throws IOException {
            out.value(value.toString());
        }

        @Override
        public T read(JsonReader reader) throws IOException {
            if (reader.peek() == JsonToken.NULL) {
                reader.nextNull();
                return null;
            } else {
                String nextString = reader.nextString();
                try {
                    return constructor.newInstance(nextString);
                } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
                    logger.error("Failed to instantiate uri of type {} from value {}", rawType, nextString, e);
                    return null;
                }
            }
        }
    };
}

---

From source file:org.translator.java.AppInventorProperties.java

License:Apache License

protected AppInventorProperties(JsonReader reader) throws IOException {
    reader.beginObject();//  w  w  w.  j  a v  a2  s  . co  m

    while (reader.peek() == JsonToken.NAME) {
        String name = reader.nextName();
        if (name.equals("$Components")) {
            reader.beginArray();

            while (reader.peek() == JsonToken.BEGIN_OBJECT)
                components.add(new AppInventorProperties(reader));

            reader.endArray();
        } else {
            String n = reader.nextString();
            if (n.matches("True|False"))
                n = n.toLowerCase();
            properties.put(name, n);
        }
    }

    reader.endObject();
}

---

From source file:org.translator.java.AppInventorScreen.java

License:Apache License

private void parseComponentJSON(JsonReader reader) throws IOException {
    reader.beginObject();/*  ww  w. ja  v a 2 s . com*/

    while (reader.peek() == JsonToken.NAME) {
        String name = reader.nextName();
        if (name.equals("Properties"))
            form = new AppInventorProperties(reader);
        else {
            String d = reader.nextString();
            if (d.matches("True|False"))
                d = d.toLowerCase();
            data.put(name, d);
        }
    }

    reader.endObject();
}

---

From source file:org.ttrssreader.net.JSONConnector.java

License:Open Source License

private String readResult(Map<String, String> params, boolean login, boolean retry) throws IOException {
    InputStream in = doRequest(params);
    if (in == null)
        return null;

    JsonReader reader = null;
    String ret = "";
    try {/*  w w w .  j  a v  a2 s  .c o m*/
        reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
        // Check if content contains array or object, array indicates login-response or error, object is content

        reader.beginObject();
        while (reader.hasNext()) {
            String name = reader.nextName();
            if (!name.equals("content")) {
                reader.skipValue();
                continue;
            }

            JsonToken t = reader.peek();
            if (!t.equals(JsonToken.BEGIN_OBJECT))
                continue;

            JsonObject object = new JsonObject();
            reader.beginObject();
            while (reader.hasNext()) {
                object.addProperty(reader.nextName(), reader.nextString());
            }
            reader.endObject();

            if (object.get(SESSION_ID) != null) {
                ret = object.get(SESSION_ID).getAsString();
            }
            if (object.get(STATUS) != null) {
                ret = object.get(STATUS).getAsString();
            }
            if (this.apiLevel == -1 && object.get(API_LEVEL) != null) {
                this.apiLevel = object.get(API_LEVEL).getAsInt();
            }
            if (object.get(VALUE) != null) {
                ret = object.get(VALUE).getAsString();
            }
            if (object.get(ERROR) != null) {
                String message = object.get(ERROR).getAsString();
                Context ctx = MyApplication.context();

                switch (message) {
                case API_DISABLED:
                    lastError = ctx.getString(R.string.Error_ApiDisabled, Controller.getInstance().username());
                    break;
                case NOT_LOGGED_IN:
                case LOGIN_ERROR:
                    if (!login && retry && login())
                        return readResult(params, false, false); // Just do the same request again
                    else
                        lastError = ctx.getString(R.string.Error_LoginFailed);
                    break;
                case INCORRECT_USAGE:
                    lastError = ctx.getString(R.string.Error_ApiIncorrectUsage);
                    break;
                case UNKNOWN_METHOD:
                    lastError = ctx.getString(R.string.Error_ApiUnknownMethod);
                    break;
                default:
                    lastError = ctx.getString(R.string.Error_ApiUnknownError);
                    break;
                }

                hasLastError = true;
                Log.e(TAG, message);
                return null;
            }

        }
    } finally {
        if (reader != null)
            reader.close();
    }
    if (ret.startsWith("\""))
        ret = ret.substring(1, ret.length());
    if (ret.endsWith("\""))
        ret = ret.substring(0, ret.length() - 1);

    return ret;
}

---

From source file:org.ttrssreader.net.JSONConnector.java

License:Open Source License

private JsonReader prepareReader(Map<String, String> params, boolean firstCall) throws IOException {
    InputStream in = doRequest(params);
    if (in == null)
        return null;
    JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));

    // Check if content contains array or object, array indicates login-response or error, object is content
    try {//  w  w  w  . j  a  v  a2  s .c om
        reader.beginObject();
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    while (reader.hasNext()) {
        String name = reader.nextName();
        if (name.equals("content")) {
            JsonToken t = reader.peek();

            if (t.equals(JsonToken.BEGIN_ARRAY)) {
                return reader;
            } else if (t.equals(JsonToken.BEGIN_OBJECT)) {

                JsonObject object = new JsonObject();
                reader.beginObject();

                String nextName = reader.nextName();
                // We have a BEGIN_OBJECT here but its just the response to call "subscribeToFeed"
                if ("status".equals(nextName))
                    return reader;

                // Handle error
                while (reader.hasNext()) {
                    if (nextName != null) {
                        object.addProperty(nextName, reader.nextString());
                        nextName = null;
                    } else {
                        object.addProperty(reader.nextName(), reader.nextString());
                    }
                }
                reader.endObject();

                if (object.get(ERROR) != null) {
                    String message = object.get(ERROR).toString();

                    if (message.contains(NOT_LOGGED_IN)) {
                        lastError = NOT_LOGGED_IN;
                        if (firstCall && login() && !hasLastError)
                            return prepareReader(params, false); // Just do the same request again
                        else
                            return null;
                    }

                    if (message.contains(API_DISABLED)) {
                        hasLastError = true;
                        lastError = MyApplication.context().getString(R.string.Error_ApiDisabled,
                                Controller.getInstance().username());
                        return null;
                    }

                    // Any other error
                    hasLastError = true;
                    lastError = message;
                }
            }

        } else {
            reader.skipValue();
        }
    }
    return null;
}

---

From source file:org.ttrssreader.net.JSONConnector.java

License:Open Source License

private boolean parseArticle(final Article a, final JsonReader reader,
        final Set<Article.ArticleField> skipNames, final IArticleOmitter filter) throws IOException {

    boolean skipObject = false;
    while (reader.hasNext() && reader.peek().equals(JsonToken.NAME)) {
        if (skipObject) {
            // field name
            reader.skipValue();/*  w  w  w . j av  a2 s.c  om*/
            // field value
            reader.skipValue();
            continue;
        }

        String name = reader.nextName();
        Article.ArticleField field = Article.ArticleField.valueOf(name);

        try {

            if (skipNames != null && skipNames.contains(field)) {
                reader.skipValue();
                continue;
            }

            switch (field) {
            case id:
                a.id = reader.nextInt();
                break;
            case title:
                a.title = reader.nextString();
                break;
            case unread:
                a.isUnread = reader.nextBoolean();
                break;
            case updated:
                a.updated = new Date(reader.nextLong() * 1000);
                break;
            case feed_id:
                if (reader.peek() == JsonToken.NULL)
                    reader.nextNull();
                else
                    a.feedId = reader.nextInt();
                break;
            case content:
                a.content = reader.nextString();
                break;
            case link:
                a.url = reader.nextString();
                break;
            case comments:
                a.commentUrl = reader.nextString();
                break;
            case attachments:
                a.attachments = parseAttachments(reader);
                break;
            case marked:
                a.isStarred = reader.nextBoolean();
                break;
            case published:
                a.isPublished = reader.nextBoolean();
                break;
            case labels:
                a.labels = parseLabels(reader);
                break;
            case author:
                a.author = reader.nextString();
                break;
            default:
                reader.skipValue();
                continue;
            }

            if (filter != null)
                skipObject = filter.omitArticle(field, a);

        } catch (IllegalArgumentException | StopJsonParsingException | IOException e) {
            Log.w(TAG, "Result contained illegal value for entry \"" + field + "\".");
            reader.skipValue();
        }
    }
    return skipObject;
}

---

From source file:org.ttrssreader.net.JSONConnector.java

License:Open Source License

private Set<Label> parseLabels(final JsonReader reader) throws IOException {
    Set<Label> ret = new HashSet<>();

    if (reader.peek().equals(JsonToken.BEGIN_ARRAY)) {
        reader.beginArray();/* w  ww  . j  a  v a  2  s .  c om*/
    } else {
        reader.skipValue();
        return ret;
    }

    try {
        while (reader.hasNext()) {

            Label label = new Label();
            reader.beginArray();
            try {
                label.id = Integer.parseInt(reader.nextString());
                label.caption = reader.nextString();
                label.foregroundColor = reader.nextString();
                label.backgroundColor = reader.nextString();
                label.checked = true;
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
                reader.skipValue();
                continue;
            }
            ret.add(label);
            reader.endArray();
        }
        reader.endArray();
    } catch (Exception e) {
        // Ignore exceptions here
        try {
            if (reader.peek().equals(JsonToken.END_ARRAY))
                reader.endArray();
        } catch (Exception ee) {
            // Empty!
        }
    }

    return ret;
}

---

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