}
            this.title = titleValue;
            this.url = toStringOrNull(doc.get("url"));
            this.docId = toStringOrNull(doc.get("doc_id"));
            this.snippet = toStringOrNull(doc.get("content_description"));
            this.urlLink = toStringOrNull(doc.get("url_link"));
        }

        private static String toStringOrNull(final Object value) {
            if (value == null) {
                return null;

            public String getIndexFieldAnchor() {
                return "anchor";
            }

            @Override
            public String getResponseFieldContentDescription() {
                return "content_description";
            }

            @Override
            public String getResponseFieldContentTitle() {
                return "content_title";
            }

            @Override

            final String content = getStringValue(doc, "content");
            final String description = getStringValue(doc, "content_description");
            String descText = StringUtil.isNotBlank(content) ? content : description;
            descText = sanitizeDocumentContent(stripHtmlTags(descText));

        final Map<String, Object> doc = new HashMap<>();
        doc.put("title", "Test Doc");
        doc.put("url", "http://example.com");
        doc.put("content", "<p>Hello <b>world</b></p>");
        doc.put("content_description", "description");
        documents.add(doc);

        final String result = client.testBuildContext(documents);
        assertTrue(result.contains("Hello world"));
        assertFalse(result.contains("<p>"));

            public String getIndexFieldAnchor() {
                return "anchor";
            }

            @Override
            public String getResponseFieldContentDescription() {
                return "content_description";
            }

            @Override
            public String getResponseFieldContentTitle() {
                return "content_title";
            }

            @Override

index.field.virtual_host=virtual_host
# Field name for content title in the response.
response.field.content_title=content_title
# Field name for content description in the response.
response.field.content_description=content_description
# Field name for URL link in the response.
response.field.url_link=url_link
# Field name for site path in the response.
response.field.site_path=site_path

    /** The key of the configuration. e.g. content_title */
    String RESPONSE_FIELD_content_title = "response.field.content_title";

    /** The key of the configuration. e.g. content_description */
    String RESPONSE_FIELD_content_description = "response.field.content_description";

    /** The key of the configuration. e.g. url_link */
    String RESPONSE_FIELD_url_link = "response.field.url_link";