# Example

Below is an example of a call to `getSummaryInfo()`:

    SummaryInfo[] sinfo = objFilter.getSummaryInfo();
    if(sinfo != null)
    {
      System.out.println("\nSummary info has been extracted.");
      fos_sum = new FileOutputStream(summaryOutFile);
      DataOutputStream dos_sum = new DataOutputStream(fos_sum);
      for(int i=0; i<sinfo.length; i++)
      {
         if(sinfo[i].getElementName() != null)
        {
           dos_sum.writeBytes("Element name: " + sinfo[i].getElementName() + "\n");
           dos_sum.writeBytes("Element type: " + sinfo[i].getSumInfoType() + "\n");
           if(sinfo[i].getIsValid() == true)
          {
             if(sinfo[i].isDateTimeType())
            {
               dos_sum.writeBytes("Date/time: ");
               dos_sum.writeBytes(sinfo[i].getDateTime());
            }
             else
            {
               byte[] data = sinfo[i].getData();
               if(data != null)
              {
                 dos_sum.writeBytes("Element data: ");
                 dos_sum.write(data);
              }
            }
          }
          dos_sum.writeBytes("\n\n");
        }
      }
      dos_sum.close();
      fos_sum.close;
    }
    sinfo=null;

The `SummaryInfo` class stores the metadata extraction results. After calling the `Filter.getSummaryInfo()`method, call the get methods provided by each instance of this class to extract metadata:

`getElementName()` | Gets the name of the metadata element.
`getSumInfoType()` | Specifies the data type of the metadata element. The possible types are: `KV_String`—The value in the metadata field is a string. `KV_Int4`—The value in the metadata field is an integer. `KV_DateTime`—The value in the metadata field is a date and time. This type is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 (Windows FILETIME EPOCH). You might need to convert this value into another format. You can also use the `isDateTimeType()` method to determine whether a metadata element is of date/time type, and then use the `getDateTime()` method to obtain the date/time in the form of a string. `KV_ClipBoard`—Currently not supported. `KV_Bool`—The value in the metadata field is a boolean. `KV_Unicode`—The value in the metadata field is a Unicode string. `KV_IEEE8`—The value in the metadata field is an IEEE 8-byte integer. `KV_Other`—The value in the metadata field is user-defined.
`getIsValid()` | Specifies whether the data value is present in the document. `true` specifies that the value is valid. For example, if the "Title" element was not populated in the document, `getIsValid` would return `false`.
`isDateTimeType()` | Determines whether the metadata element is of date/time type.
`getDateTime()` | Gets the date and time in the form of a string. If the metadata element is of `KV_DateTime` type, call this method to get the date and time in the form of a string, for example "Wed Jun 30 21:49:08 1993" or "135 Minutes".
`getData()` | Gets the content of the element. If `type` is `KV_Int4` or `KV_Bool`, `data` contains the actual value. Otherwise, `data` is a pointer to the actual value. `KV_DateTime` and `KV_IEEE8` point to an 8-byte value. `KV_String` and `KV_Unicode` point to the beginning of the string that contains the text. `KV_Unicode` is replaced with `KV_String` when the UNICODE value has been character mapped to the desired output character set.

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