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:au.edu.unsw.cse.soc.federatedcloud.deployers.github.repository.GitHubRepoDeploymentWrapper.java

License:Open Source License

protected <V> V parseJson(InputStream stream, Type type, Type listType) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(stream, CHARSET_UTF8), bufferSize);
    if (listType == null)
        try {/*from  w  w w  . ja va2  s  .co  m*/
            return gson.fromJson(reader, type);
        } catch (JsonParseException jpe) {
            IOException ioe = new IOException("Parse exception converting JSON to object"); //$NON-NLS-1$
            ioe.initCause(jpe);
            throw ioe;
        } finally {
            try {
                reader.close();
            } catch (IOException ignored) {
                // Ignored
            }
        }
    else {
        JsonReader jsonReader = new JsonReader(reader);
        try {
            if (jsonReader.peek() == BEGIN_ARRAY)
                return gson.fromJson(jsonReader, listType);
            else
                return gson.fromJson(jsonReader, type);
        } catch (JsonParseException jpe) {
            IOException ioe = new IOException("Parse exception converting JSON to object"); //$NON-NLS-1$
            ioe.initCause(jpe);
            throw ioe;
        } finally {
            try {
                jsonReader.close();
            } catch (IOException ignored) {
                // Ignored
            }
        }
    }
}

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From source file:blog.ClassTypeAdapter.java

License:Apache License

@Override
public Class<?> read(JsonReader jsonReader) throws IOException {
    if (jsonReader.peek() == JsonToken.NULL) {
        jsonReader.nextNull();//from   ww  w .ja v a  2  s  . c o  m
        return null;
    }
    Class<?> clazz;
    try {
        clazz = Class.forName(jsonReader.nextString());
    } catch (ClassNotFoundException exception) {
        throw new IOException(exception);
    }
    return clazz;
}

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From source file:br.com.caelum.restfulie.gson.converters.DateTypeAdapter.java

License:Apache License

@Override
public Date read(JsonReader in) throws IOException {
    if (in.peek() == JsonToken.NULL) {
        in.nextNull();//from w ww . ja v  a2s .  com
        return null;
    }
    return deserializeToDate(in.nextString());
}

---

From source file:cc.kave.commons.utils.json.legacy.UsageTypeAdapter.java

License:Open Source License

@Override
public Usage read(JsonReader in) throws IOException {

    if (in.peek() == JsonToken.STRING) {
        String val = in.nextString();
        Asserts.assertEquals("NoUsage", val, "Invalid JSON. Expected 'NoUsage', but found '" + val + "'.");
        return new NoUsage();
    }// w  w  w  .j a  v  a  2 s  .  c o m

    Query q = new Query();
    q.setAllCallsites(null);

    in.beginObject();
    while (in.hasNext()) {
        String name = in.nextName();
        if (TYPE.equals(name)) {
            q.setType(CoReTypeName.get(in.nextString()));
        } else if (CLASS_CTX.equals(name)) {
            q.setClassContext(CoReTypeName.get(in.nextString()));
        } else if (METHOD_CTX.equals(name)) {
            q.setMethodContext(CoReMethodName.get(in.nextString()));
        } else if (DEFINITION.equals(name)) {
            q.setDefinition(readDefinition(in));
        } else if (SITES.equals(name)) {
            q.setAllCallsites(readCallSites(in));
        } else {
            // skip value (most likely $type key from .net serialization)
            in.nextString();
        }
    }
    in.endObject();
    return q;
}

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From source file:ch.cyberduck.core.importer.JsonBookmarkCollection.java

License:Open Source License

protected String readNext(final String name, final JsonReader reader) throws IOException {
    if (reader.peek() != JsonToken.NULL) {
        return reader.nextString();
    } else {/* w ww  .j  av  a  2 s.co  m*/
        reader.skipValue();
        log.warn(String.format("No value for key %s", name));
        return null;
    }
}

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From source file:cloud.artik.client.JSON.java

License:Apache License

@Override
public DateTime read(JsonReader in) throws IOException {
    switch (in.peek()) {
    case NULL:/*  w ww  .  jav  a2  s .c  o m*/
        in.nextNull();
        return null;
    default:
        String date = in.nextString();
        return formatter.parseDateTime(date);
    }
}

---

From source file:cn.ieclipse.af.demo.sample.volley.adapter.IntAdapter.java

License:Apache License

@Override
public Number read(JsonReader in) throws IOException {
    int num = 0;/*www.  j  av a 2 s.  co  m*/
    // 0
    if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        num = 0;
    } else {
        try {
            double input = in.nextDouble();//?double??
            num = (int) input;//int
        } catch (NumberFormatException e) {
            throw new JsonSyntaxException(e);
        }
    }
    return num;
}

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From source file:cn.ieclipse.af.demo.sample.volley.adapter.StringAdapter.java

License:Apache License

@Override
public String read(JsonReader reader) {
    String text = "";
    try {/*from   ww  w. j  av  a 2 s .  c o m*/
        if (reader.peek() == JsonToken.NULL) {
            reader.nextNull();
            text = "";//Null
        } else {
            text = reader.nextString();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return text;
}

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From source file:co.cask.cdap.client.StreamClient.java

License:Apache License

/**
 * Reads events from a stream/*w  ww . ja  v a  2s. co m*/
 *
 * @param streamId ID of the stream
 * @param start Timestamp in milliseconds or now-xs format to start reading event from (inclusive)
 * @param end Timestamp in milliseconds or now-xs format for the last event to read (exclusive)
 * @param limit Maximum number of events to read
 * @param callback Callback to invoke for each stream event read. If the callback function returns {@code false}
 *                 upon invocation, it will stops the reading
 * @throws IOException If fails to read from stream
 * @throws StreamNotFoundException If the given stream does not exists
 */
public void getEvents(Id.Stream streamId, String start, String end, int limit,
        Function<? super StreamEvent, Boolean> callback)
        throws IOException, StreamNotFoundException, UnauthenticatedException {

    long startTime = TimeMathParser.parseTime(start, TimeUnit.MILLISECONDS);
    long endTime = TimeMathParser.parseTime(end, TimeUnit.MILLISECONDS);

    URL url = config.resolveNamespacedURLV3(streamId.getNamespace(), String
            .format("streams/%s/events?start=%d&end=%d&limit=%d", streamId.getId(), startTime, endTime, limit));
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
    AccessToken accessToken = config.getAccessToken();
    if (accessToken != null) {
        urlConn.setRequestProperty(HttpHeaders.AUTHORIZATION,
                accessToken.getTokenType() + " " + accessToken.getValue());
    }

    if (urlConn instanceof HttpsURLConnection && !config.isVerifySSLCert()) {
        try {
            HttpRequests.disableCertCheck((HttpsURLConnection) urlConn);
        } catch (Exception e) {
            // TODO: Log "Got exception while disabling SSL certificate check for request.getURL()"
        }
    }

    try {
        if (urlConn.getResponseCode() == HttpURLConnection.HTTP_UNAUTHORIZED) {
            throw new UnauthenticatedException("Unauthorized status code received from the server.");
        }
        if (urlConn.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND) {
            throw new StreamNotFoundException(streamId);
        }
        if (urlConn.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT) {
            return;
        }

        // The response is an array of stream event object
        InputStream inputStream = urlConn.getInputStream();
        JsonReader jsonReader = new JsonReader(new InputStreamReader(inputStream, Charsets.UTF_8));
        jsonReader.beginArray();
        while (jsonReader.peek() != JsonToken.END_ARRAY) {
            Boolean result = callback.apply(GSON.<StreamEvent>fromJson(jsonReader, StreamEvent.class));
            if (result == null || !result) {
                break;
            }
        }
        drain(inputStream);
        // No need to close reader, the urlConn.disconnect in finally will close all underlying streams
    } finally {
        urlConn.disconnect();
    }
}

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From source file:co.cask.cdap.common.io.CaseInsensitiveEnumTypeAdapterFactory.java

License:Apache License

public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
    @SuppressWarnings("unchecked")
    Class<T> rawType = (Class<T>) type.getRawType();
    if (!rawType.isEnum()) {
        return null;
    }/*w  w w.j a  v a 2s . c  o  m*/

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

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

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

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