com.acrolinx.sidebar.utils.FragmentContentHandler Maven / Gradle / Ivy

Go to download
/* Copyright (c) 2018 Acrolinx GmbH */
package com.acrolinx.sidebar.utils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.xml.sax.Attributes;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

public class FragmentContentHandler extends DefaultHandler {
  private static String markerXpath;
  private static List documentXpaths = new ArrayList<>();

  private String xPath = "/";
  private final XMLReader xmlReader;
  private FragmentContentHandler parent;
  private final Map elementNameCount = new HashMap<>();

  public FragmentContentHandler(XMLReader xmlReader) {
    this.xmlReader = xmlReader;
  }

  private FragmentContentHandler(String xPath, XMLReader xmlReader, FragmentContentHandler parent) {
    this(xmlReader);
    this.xPath = xPath;
    this.parent = parent;
  }

  @Override
  public void startElement(String uri, String localName, String qName, Attributes attributes)
      throws FragmentContentException {
    Integer count = elementNameCount.get(qName);

    if (null == count) {
      count = 1;
    } else {
      count++;
    }

    elementNameCount.put(qName, count);
    String childXPath = xPath + "/" + qName + "[" + count + "]";

    if (xPath.equals("/")) {
      documentXpaths.clear();
    }

    documentXpaths.add(childXPath);

    if (childXPath.contains("acroseparator")) {
      markerXpath = childXPath;
      throw new FragmentContentException("Stop parser - xpath is prepared");
    }

    FragmentContentHandler child = new FragmentContentHandler(childXPath, xmlReader, this);
    xmlReader.setContentHandler(child);
  }

  @Override
  public void endElement(String uri, String localName, String qName) {
    xmlReader.setContentHandler(parent);
  }

  @Override
  public void characters(char[] ch, int start, int length) {
    // nothing to do here
  }

  public String getMarkerXpath() {
    return markerXpath;
  }

  public List getDocumentXpaths() {
    return documentXpaths;
  }
}