Java Code Examples for org.codehaus.jackson.JsonGenerator#writeNull()

The following examples show how to use org.codehaus.jackson.JsonGenerator#writeNull() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: JMXJsonServlet.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
private void writeObject(JsonGenerator jg, Object value) throws IOException {
  if(value == null) {
    jg.writeNull();
  } else {
    Class<?> c = value.getClass();
    if (c.isArray()) {
      jg.writeStartArray();
      int len = Array.getLength(value);
      for (int j = 0; j < len; j++) {
        Object item = Array.get(value, j);
        writeObject(jg, item);
      }
      jg.writeEndArray();
    } else if(value instanceof Number) {
      Number n = (Number)value;
      jg.writeNumber(n.toString());
    } else if(value instanceof Boolean) {
      Boolean b = (Boolean)value;
      jg.writeBoolean(b);
    } else if(value instanceof CompositeData) {
      CompositeData cds = (CompositeData)value;
      CompositeType comp = cds.getCompositeType();
      Set<String> keys = comp.keySet();
      jg.writeStartObject();
      for(String key: keys) {
        writeAttribute(jg, key, cds.get(key));
      }
      jg.writeEndObject();
    } else if(value instanceof TabularData) {
      TabularData tds = (TabularData)value;
      jg.writeStartArray();
      for(Object entry : tds.values()) {
        writeObject(jg, entry);
      }
      jg.writeEndArray();
    } else {
      jg.writeString(value.toString());
    }
  }
}
Example 2
Source File: JMXJsonServlet.java    From big-c with Apache License 2.0 5 votes vote down vote up 
private void writeObject(JsonGenerator jg, Object value) throws IOException {
  if(value == null) {
    jg.writeNull();
  } else {
    Class<?> c = value.getClass();
    if (c.isArray()) {
      jg.writeStartArray();
      int len = Array.getLength(value);
      for (int j = 0; j < len; j++) {
        Object item = Array.get(value, j);
        writeObject(jg, item);
      }
      jg.writeEndArray();
    } else if(value instanceof Number) {
      Number n = (Number)value;
      jg.writeNumber(n.toString());
    } else if(value instanceof Boolean) {
      Boolean b = (Boolean)value;
      jg.writeBoolean(b);
    } else if(value instanceof CompositeData) {
      CompositeData cds = (CompositeData)value;
      CompositeType comp = cds.getCompositeType();
      Set<String> keys = comp.keySet();
      jg.writeStartObject();
      for(String key: keys) {
        writeAttribute(jg, key, cds.get(key));
      }
      jg.writeEndObject();
    } else if(value instanceof TabularData) {
      TabularData tds = (TabularData)value;
      jg.writeStartArray();
      for(Object entry : tds.values()) {
        writeObject(jg, entry);
      }
      jg.writeEndArray();
    } else {
      jg.writeString(value.toString());
    }
  }
}
Example 3
Source File: LinkSerializer.java    From secure-data-service with Apache License 2.0 5 votes vote down vote up 
@Override
public void serialize(Link link, JsonGenerator jgen, SerializerProvider provider) throws IOException {
    
    if (link == null) {
        jgen.writeNull();
        return;
    }
    
    String linkString = "{\"rel\":\"" + link.getLinkName() + "\",\"href\":\"" + link.getResourceURL().toString()
            + "\"}";
    jgen.writeRaw(linkString);
}
Example 4
Source File: BlockingSerializer.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
public void serialize(String object, JsonGenerator jGen, SerializerProvider sProvider) 
throws IOException, JsonProcessingException {
  jGen.writeNull();
}
Example 5
Source File: BlockingSerializer.java    From big-c with Apache License 2.0 4 votes vote down vote up 
public void serialize(String object, JsonGenerator jGen, SerializerProvider sProvider) 
throws IOException, JsonProcessingException {
  jGen.writeNull();
}
Example 6
Source File: ParquetAsJsonInputFormat.java    From iow-hadoop-streaming with Apache License 2.0 4 votes vote down vote up 
private void groupToJson(JsonGenerator currentGenerator, SimpleGroup grp)
      throws IOException {

    GroupType gt = grp.getType();

    currentGenerator.writeStartObject();
    for(int i = 0; i < gt.getFieldCount(); i ++) {

        String field = gt.getFieldName(i);
        try {
            Type t = gt.getType(i);
            int repetition = 1;
            boolean repeated = false;
            if (t.getRepetition() == Type.Repetition.REPEATED) {
                repeated = true;
                repetition = grp.getFieldRepetitionCount(i);
                currentGenerator.writeArrayFieldStart(field);
            }
            else
                currentGenerator.writeFieldName(field);

            for(int j = 0; j < repetition; j ++) {

                if (t.isPrimitive()) {
                    switch (t.asPrimitiveType().getPrimitiveTypeName()) {
                        case BINARY:
                            currentGenerator.writeString(grp.getString(i, j));
                            break;
                        case INT32:
                            currentGenerator.writeNumber(grp.getInteger(i, j));
                            break;
                        case INT96:
                        case INT64:
                            // clumsy way - TODO - Subclass SimpleGroup or something like that
                            currentGenerator.writeNumber(Long.parseLong(grp.getValueToString(i, j)));
                            break;
                        case DOUBLE:
                        case FLOAT:
                            currentGenerator.writeNumber(Double.parseDouble(grp.getValueToString(i, j)));
                            break;
                        case BOOLEAN:
                            currentGenerator.writeBoolean(grp.getBoolean(i, j));
                            break;
                        default:
                            throw new RuntimeException("Can't handle type " + gt.getType(i));
                    }
                } else {
                    groupToJson(currentGenerator, (SimpleGroup) grp.getGroup(i, j));
                }
            }

            if (repeated)
                currentGenerator.writeEndArray();
        }
        catch (Exception e) {
            if (e.getMessage().startsWith("not found") && gt.getType(i).getRepetition() == Type.Repetition.OPTIONAL)
                currentGenerator.writeNull();
            else
                 throw new RuntimeException(e);
        }
    }
    currentGenerator.writeEndObject();
}