/*
* Seldon -- open source prediction engine
* =======================================
* Copyright 2011-2015 Seldon Technologies Ltd and Rummble Ltd (http://www.seldon.io/)
*
**********************************************************************************************
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**********************************************************************************************
*/
package io.seldon.importer.articles.dynamicextractors;
import org.apache.commons.lang3.StringUtils;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
//@formatter:off
/*
example config:
{"attribute_detail_list":[
{
"name": "tags",
"is_required": false,
"extractor_type": "AllElementsTextListValue",
"extractor_args": ["section[id=tags] > a"],
"default_value": ""
}
]}
*/
//@formatter:on
public class AllElementsTextListValueDynamicExtractor extends DynamicExtractor {
@Override
public String extract(AttributeDetail attributeDetail, String url, Document articleDoc) throws Exception {
String attrib_value = null;
if ((attributeDetail.extractor_args != null) && (attributeDetail.extractor_args.size() >= 1)) {
String cssSelector = attributeDetail.extractor_args.get(0);
Elements elements = articleDoc.select(cssSelector);
if (StringUtils.isNotBlank(cssSelector)) {
if (elements != null) {
StringBuilder sb = new StringBuilder();
boolean isFirstInList=true;
for (Element e : elements) {
String eText = e.text();
eText = StringUtils.strip(eText);
if(StringUtils.isBlank(eText)) continue;
eText = eText.toLowerCase();
if (isFirstInList) {
isFirstInList = false;
} else {
sb.append(",");
}
sb.append(eText);
}
attrib_value = sb.toString();
}
}
}
return attrib_value;
}
}