enhancement-engines/metaxa/src/main/java/org/apache/stanbol/enhancer/engines/metaxa/core/html/HtmlParser.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.stanbol.enhancer.engines.metaxa.core.html;

import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.ParserConfigurationException;

import org.htmlcleaner.CleanerProperties;
import org.htmlcleaner.HtmlCleaner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;

/**
 * HtmlParser.java
 *
 * @author <a href="mailto:kasper@dfki.de">Walter Kasper</a>
 *
 */
public class HtmlParser {

    /**
     * This contains the logger.
     */
    private static final Logger LOG = LoggerFactory.getLogger(HtmlParser.class);

    private HtmlCleaner htmlToXmlParser;
    private CleanerProperties parserProps;
    private DomSerializer2 domCreator;


    public HtmlParser() {
        this.htmlToXmlParser = new HtmlCleaner();
        this.parserProps = this.htmlToXmlParser.getProperties();
        this.parserProps.setRecognizeUnicodeChars(true);
        this.parserProps.setUseEmptyElementTags(true);
        this.parserProps.setAdvancedXmlEscape(true);
        this.parserProps.setTranslateSpecialEntities(true);
        this.parserProps.setOmitComments(true);
        this.parserProps.setPruneTags("script,style,form,map,noscript");
        this.domCreator = new DomSerializer2(this.parserProps,true);
        // TODO override otpions form config
    }


    public Document getDOM(String html) {
        Document doc = null;
        try {
            doc = domCreator.createDOM(this.htmlToXmlParser.clean(html));
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return doc;
    }


    public Document getDOM(InputStream html, String charset) {
        Document doc = null;
        try {
            doc =
                domCreator.createDOM(this.htmlToXmlParser.clean(html, charset));
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return doc;
    }
}