Hi,
*Quick context of the application first.*
I am currently using Solr in standalone mode to index thousands of
text-like documents (not exactly textual documents).
A single document has a structure like following:
- *id* - unique file id
- *line_text* - textual data
- *file_local_url* - file's directory location path
- *line_no* - line number of the line_text
*What I am trying to achieve?*
After I search on the line_text field, as a result I should see the
matching text snippets. A text snippet can be the lines from (line_no - 3)
to (line_no + 3). Currently for search front-end I am using Solr's in-built
Velocity response writer and its templates.
*How I am thinking of doing this?*
I am using the default Velocity templates which are shipped with Solr. In
the template file hit.vm, following is the way it currently fetches,
processes and displays the responses:
#foreach( $fieldName in $doc.fieldNames )
<tr>
<th align="right" valign="top" style="field-name">
$esc.html($fieldName):
</th>
<td align="left" valign="top">
#field($fieldName)
</td>
</tr>#end
Now to get the snippet text I would like to define an external function
somewhere in a Java class something of this form:
public String getSnippet(file_local_url, line_no)
which will return the snippet in a string format.
Now I want to consume this response in the velocity template. There I am
thinking of something like this:
## get the snippet string by calling the external ava function
#set($snippet = $someClass.getSnippet(#field("file_local_url"),
#field("line_no)))
## print the snippet
snippet
(I am not sure if this is the correct syntax.)
*Questions:*
1. What kind of file should contain someClass.getSnippet()? Java file?
Class file? A jar?
2. Where should I keep this file? How will velocity know where to find
this class?
3. Am I using the write syntax to call the method and use its results in
above Velocity template?
I am quite not getting the bigger picture yet (especially the question 2
above).
Please provide some direction. Thanks.
Ravi.
--
What if the cure for cancer is trapped inside the mind of someone who
can't afford an education? - anonymous
