Solr/SolrJ: How do you Highlight non-text fields?

I have been successful in enabling highlighting on Text based field types, but not for non-text field types...

How does one configure solr to highlight non-text field types? I cannot find a example on the web for non-text fields. Is it even possib开发者_JS百科le?

Specifically I want to highlight the Date value in the document that meets the query.

I am using solrJ to peform the query, could it be the limiting factor?

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Highlighting is not possible on non "text" fields. Look at this:

/**
   * Returns a collection of the names of all stored fields which can be
   * highlighted the index reader knows about.
   */
  public Collection<String> getStoredHighlightFieldNames() {
    if (storedHighlightFieldNames == null) {
      storedHighlightFieldNames = new LinkedList<String>();
      for (String fieldName : fieldNames) {
        try {
          SchemaField field = schema.getField(fieldName);

Especially here:

          if (field.stored() &&
                  ((field.getType() instanceof org.apache.solr.schema.TextField) ||
                  (field.getType() instanceof org.apache.solr.schema.StrField))) {

until here

            storedHighlightFieldNames.add(fieldName);
          }
        } catch (RuntimeException e) { // getField() throws a SolrException, but it arrives as a RuntimeException
            log.warn("Field \"" + fieldName + "\" found in index, but not defined in schema.");
        }
      }
    }
    return storedHighlightFieldNames;
  }

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You can't do this as was explained.

But it's super simple to adapt Solr to handle this. Create another field for your date but in string format. Now just use a copyField:

<field name="date1" type="date" indexed="true" stored="true" />
<field name="date1_str" type="string" indexed="true" stored="true" />

<copyField source="date1" dest="date1_str"/>

Then just add the field date1_str to your query.