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

Introduction

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

Prototype

public boolean hasNext() throws IOException

Source Link

Document

Returns true if the current array or object has another element.

Usage

From source file:data.Task1bData.java

License:Apache License

public ArrayList<String> readConcepts(JsonReader reader) {

    ArrayList<String> conc = new ArrayList<String>();
    int count = 0;
    try {//from   w w  w .  j a  va  2s  .  c  om
        reader.beginArray();
        while (reader.hasNext()) {
            String nextString = reader.nextString();
            if (!conc.contains(nextString))
                conc.add(nextString);
        }
        reader.endArray();
    } catch (IOException ex) {
    }

    return conc;

}

From source file:data.Task1bData.java

License:Apache License

public ArrayList<String> readDocuments(JsonReader reader) {

    ArrayList<String> docs = new ArrayList<String>();
    int count = 0;
    try {/*from w w w  .j  a v  a 2 s  .c  om*/
        reader.beginArray();
        while (reader.hasNext()) {
            String nextString = reader.nextString();
            if (!docs.contains(nextString))
                docs.add(nextString);
        }
        reader.endArray();
    } catch (IOException ex) {
    }

    return docs;

}

From source file:data.TaskADataParser.java

License:Apache License

public static PubMedDocument getNextDocument(JsonReader reader) {
    String text = null;/*from  www .  j a  va  2  s . c o m*/
    String title = null;
    String pmid = null;
    String journal = null;
    String[] meshMajor = null;

    try {
        if (reader.hasNext()) {
            reader.beginObject();

            while (reader.hasNext()) {
                String name = reader.nextName();

                if (name.equals("abstractText")) {

                    text = reader.nextString();

                } else if (name.equals("journal")) {
                    journal = reader.nextString();

                } else if (name.equals("meshMajor")) {
                    meshMajor = readLabelsArray(reader);

                } else if (name.equals("pmid")) {
                    pmid = reader.nextString();
                } else if (name.equals("title")) {
                    title = reader.nextString();
                } else if (name.equals("year")) {
                    reader.skipValue();
                } else {
                    System.out.println(name);
                    reader.skipValue();
                }
            }
            reader.endObject();
        }
    } catch (Exception ex) {
    }

    return new PubMedDocument(text, title, pmid, journal, meshMajor);
}

From source file:data.TaskADataParser.java

License:Apache License

public static String[] readLabelsArray(JsonReader reader) {

    String labels[];//from  ww  w  .j  a  va 2 s . c om
    ArrayList<String> lab = new ArrayList<String>();
    try {
        reader.beginArray();
        while (reader.hasNext()) {
            String nextString = reader.nextString();
            lab.add(nextString);
        }
        reader.endArray();
    } catch (IOException ex) {
    }
    labels = new String[lab.size()];
    labels = lab.toArray(labels);
    return labels;
}

From source file:de.dentrassi.eclipse.provider.eclipse.ValueAdapter.java

License:Open Source License

@Override
public String read(final JsonReader in) throws IOException {
    if (in.peek() == JsonToken.NULL) {
        return null;
    }/*  w  w  w  .j  a  v a2  s .c o  m*/

    String result = null;
    in.beginArray();
    while (in.hasNext()) {
        in.beginObject();
        while (in.hasNext()) {
            final String name = in.nextName();
            if ("value".equals(name)) {
                result = in.nextString();
            } else {
                in.skipValue();
            }
        }
        in.endObject();
    }
    in.endArray();

    return result;
}

From source file:de.loercher.geomodule.cloudant.CloudantGeoSearchStream.java

private void extractEntities(BufferedReader bufferedReader) throws JSONParseException {
    JsonReader reader = new JsonReader(bufferedReader);
    try {/*  w ww. j  a  v  a 2 s .c o  m*/
        reader.beginObject();

        String arrayName = null;
        while (reader.hasNext() && !("features".equals(arrayName))) {
            arrayName = reader.nextName();
            if ("bookmark".equals(arrayName)) {
                bookmark = reader.nextString();
            } else if (!("features".equals(arrayName))) {
                reader.skipValue();
            }
        }

        if ("features".equals(arrayName)) {
            reader.beginArray();

            while (reader.hasNext()) {
                Gson gson = new Gson();
                CloudantArticleEntity entity = gson.fromJson(reader, CloudantArticleEntity.class);

                // Duplicates should not be returned
                if (!(alreadyAvailableIds.contains(entity.getId()))) {
                    bufferedEntities.add(entity);
                }

                alreadyAvailableIds.add(entity.getId());
            }

            reader.endArray();
            reader.endObject();
            reader.close();
        } else {
            JSONParseException e = new JSONParseException(
                    "Parsing of cloudant response failed. Tag 'features' not found. ");
            log.error(e.getLoggingString());
            throw e;
        }
    } catch (IOException ex) {
        JSONParseException e = new JSONParseException("Parsing of cloudant response failed.", ex);
        log.error(e.getLoggingString());
        throw e;
    }
}

From source file:de.pribluda.android.jsonmarshaller.JSONUnmarshaller.java

License:Apache License

/**
 * unmarshall single JSON object//from ww  w  . ja v a2  s.  co m
 *
 * @param beanToBeCreatedClass
 * @param <T>
 * @return
 * @throws IllegalAccessException
 * @throws InstantiationException
 * @throws NoSuchMethodException
 * @throws InvocationTargetException
 */
public static <T> T unmarshall(JsonReader reader, java.lang.Class<T> beanToBeCreatedClass) throws IOException,
        NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
    // nothing there - bail out
    reader.beginObject();

    if (reader.peek() == null) {
        return null;
    }
    T value = beanToBeCreatedClass.getConstructor().newInstance();
    while (reader.hasNext()) {
        String key = reader.nextName();

        //  capitalise to standard setter pattern
        StringBuilder sb = new StringBuilder();
        sb.append(SETTER_PREFIX).append(Character.toUpperCase(key.charAt(0))).append(key.substring(1));
        String methodName = sb.toString();

        Method method = getCandidateMethod(beanToBeCreatedClass, methodName);

        // must be kind of setter method
        if (method != null) {
            Class clazz = method.getParameterTypes()[0];
            // as we have setter, we can process value
            Object v = unmarshalValue(reader, clazz);

            // can we use setter method directly?
            if (clazz.isAssignableFrom(v.getClass())) {
                method.invoke(value, v);
                continue;
            }

            Object obj = convertToObject(clazz, v);
            if (obj != null)
                method.invoke(value, obj);
        } else {
            // no suitable method was found - skip this value altogether
            reader.skipValue();
        }
    }

    reader.endObject();

    return value;

}

From source file:de.pribluda.android.jsonmarshaller.JSONUnmarshaller.java

License:Apache License

/**
 * recursively populate array out of hierarchy of JSON Objects
 *
 * @param arrayClass original array class
 * @param reader     reader to be processed
 * @return//w w  w .j  av a 2  s.com
 */
private static Object populateRecusrsive(Class arrayClass, JsonReader reader) throws InvocationTargetException,
        NoSuchMethodException, InstantiationException, IllegalAccessException, IOException {
    ArrayList value = new ArrayList();
    Object retval = null;
    reader.beginArray();
    if (arrayClass.isArray()) {
        // create list, as we do not know size yet

        final Class componentType = arrayClass.getComponentType();
        // iterate over reader
        while (reader.hasNext()) {
            Object component;
            if (componentType.isArray()) {
                // component is array - dive down
                component = populateRecusrsive(componentType, reader);
                if (component != null) {
                    value.add(component);
                }
            } else {
                // component is leaf,
                Object leaf = unmarshalValue(reader, componentType);
                Object obj = convertToObject(componentType, leaf);
                if (obj != null) {
                    value.add(obj);
                }
            }
        }
        // copy everything to array,
        retval = Array.newInstance(componentType, value.size());
        for (int i = 0; i < value.size(); i++) {
            Array.set(retval, i, value.get(i));
        }
    } else {
        return null;
    }
    reader.endArray();

    return retval;
}

From source file:de.sabian.objectstore.ObjectStoreRaw.java

License:Apache License

public <T> boolean fillCollection(String identifier, Class<T> clazz, Collection<T> collection)
        throws IOException {
    if (contains(identifier)) {
        JsonReader jReader = new JsonReader(new StringReader(mJsonStorage.getJson(identifier)));
        jReader.beginArray();/*from w  ww .  j a  v  a2  s . c  om*/
        while (jReader.hasNext()) {
            T object = mGson.fromJson(jReader, clazz);
            collection.add(object);
        }
        jReader.endArray();
        jReader.close();
        return true;
    } else
        return false;
}

From source file:de.sabian.objectstore.ObjectStoreRaw.java

License:Apache License

public <T, X> boolean fillMap(String identifier, Class<T> classOfKeys, Class<X> classOfValues, Map<T, X> map)
        throws IOException {
    if (contains(identifier)) {
        JsonReader jReader = new JsonReader(new StringReader(mJsonStorage.getJson(identifier)));
        jReader.beginArray();//from w w w  .ja va  2 s  .  c  o m
        while (jReader.hasNext()) {
            jReader.beginObject();
            String name = jReader.nextName();
            if (!name.equals("key"))
                throw new IOException("expected name key but found: " + name);
            T key = mGson.fromJson(jReader, classOfKeys);
            name = jReader.nextName();
            if (!name.equals("value"))
                throw new IOException("expected name value but found: " + name);
            X value = mGson.fromJson(jReader, classOfValues);
            jReader.endObject();
            map.put(key, value);
        }
        jReader.endArray();
        jReader.close();
        return true;
    } else
        return false;
}