Example usage for com.mongodb BasicDBList markAsPartialObject

Introduction

In this page you can find the example usage for com.mongodb BasicDBList markAsPartialObject.

Prototype

@Override
    public void markAsPartialObject() 

Source Link

Usage

From source file:org.eclipse.birt.data.oda.mongodb.impl.MDbResultSet.java

License:Open Source License

public String getString(String columnName) throws OdaException {
    Object columnValue = getFieldValue(columnName);
    if (columnValue instanceof String)
        return (String) columnValue;

    if (columnValue instanceof List && !(columnValue instanceof BasicDBList)) {
        // convert generic List to JSON-formattable list
        List<?> fromList = (List<?>) columnValue;
        if (!fromList.isEmpty()) {
            BasicDBList fieldValuesList = new BasicDBList();
            for (int index = 0; index < fromList.size(); index++) {
                fieldValuesList.put(index, fromList.get(index));
            }//www. j  av  a2  s  .c o m
            fieldValuesList.markAsPartialObject();
            return fieldValuesList.toString(); // return JSON expr format
        }
    }

    if (columnValue instanceof byte[])
        return convertToString((byte[]) columnValue);

    return columnValue != null ? columnValue.toString() : null;
}

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From source file:org.eclipse.birt.data.oda.mongodb.internal.impl.ResultDataHandler.java

License:Open Source License

private static BasicDBList fetchFieldValuesFromList(String fieldFullName, BasicDBList fromDBList) {
    if (fromDBList == null || fromDBList.size() == 0)
        return null;

    // get the named field value from each element in given array list
    BasicDBList fieldValuesList = new BasicDBList();
    if (fromDBList.isPartialObject())
        fieldValuesList.markAsPartialObject();

    for (int index = 0; index < fromDBList.size(); index++) {
        Object listElementObj = fromDBList.get(String.valueOf(index));
        if (listElementObj instanceof DBObject) // nested complex object, e.g. document
            listElementObj = fetchFieldValues(fieldFullName, (DBObject) listElementObj);
        fieldValuesList.put(index, listElementObj);
    }//from  w  ww  .  j  a  v  a2s .co m

    // check if at least one field value in list is not null, return the list
    for (Object elementValue : fieldValuesList.toMap().values()) {
        if (elementValue != null)
            return fieldValuesList;
    }

    return null; // all values in list is null
}

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