io.seldon.importer.articles.dynamicextractors.FirstElementTextValueDynamicExtractor.java Source code

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Here is the source code for io.seldon.importer.articles.dynamicextractors.FirstElementTextValueDynamicExtractor.java

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/*
 * 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 java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

//@formatter:off
/*
    
example config:
    
{"attribute_detail_list":[
   {
   "name": "title",
   "is_required": true,
   "extractor_type": "FirstElementTextValue",
   "extractor_args": ["h1"],
   "default_value": ""
   }
]}
    
*/
//@formatter:on

public class FirstElementTextValueDynamicExtractor extends DynamicExtractor {
    static Pattern pattern = null;

    @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);
            Element element = articleDoc.select(cssSelector).first();
            if (StringUtils.isNotBlank(cssSelector)) {
                if (element != null) {
                    attrib_value = element.text();
                }
            }
        }

        if ((attrib_value != null) && (attributeDetail.extractor_args != null)
                && (attributeDetail.extractor_args.size() >= 2)) {
            String regexSelector = attributeDetail.extractor_args.get(1);
            pattern = Pattern.compile(regexSelector);
            Matcher m = pattern.matcher(attrib_value);
            m.find();
            attrib_value = m.group(1);
        }

        return attrib_value;
    }

}