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Copy pathAtomReader.java
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152 lines (137 loc) · 5.77 KB
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/**
* (c) 2020 Wolfgang Hauptfleisch <dev@augmentedlogic.com>
* This file is part of simplefeedreader
* Licence: Apache v2
**/
package com.augmentedlogic.simplefeedreader;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.XMLEvent;
import javax.xml.stream.events.*;
import javax.xml.namespace.QName;
public class AtomReader {
static final String ATOM_TITLE = "title";
static final String ATOM_SUBTITLE = "subtitle";
static final String ATOM_DESCRIPTION = "summary";
static final String ATOM_CHANNEL = "channel";
static final String ATOM_LANGUAGE = "language";
static final String ATOM_COPYRIGHT = "rights";
static final String ATOM_LINK = "link";
static final String ATOM_AUTHOR = "name";
static final String ATOM_ITEM = "entry";
static final String ATOM_PUB_DATE = "updated";
static final String ATOM_GUID = "id";
private Boolean plain_text = false;
private String process(String html_string)
{
if(this.plain_text) {
if (html_string != null) {
html_string = html_string.replaceAll("(\\<.*?\\>|<.*?>)", "").trim();
}
}
return html_string;
}
protected Feed readFeed(InputStream in) {
Feed feed = null;
try {
boolean isFeedHeader = true;
String description = "";
String title = "";
String link = "";
String language = "";
String copyright = "";
String author = "";
String pubdate = "";
String guid = "";
String subtitle = "";
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
inputFactory.setProperty("javax.xml.stream.isCoalescing", true);
XMLEventReader eventReader = inputFactory.createXMLEventReader(in);
// iterate over the document
while (eventReader.hasNext()) {
XMLEvent event = eventReader.nextEvent();
if (event.isStartElement()) {
String localPart = event.asStartElement().getName()
.getLocalPart();
switch (localPart) {
case ATOM_ITEM:
if (isFeedHeader) {
isFeedHeader = false;
feed = new Feed(title, link, description, language,
copyright, pubdate);
}
event = eventReader.nextEvent();
break;
case ATOM_TITLE:
title = getCharacterData(event, eventReader);
break;
case ATOM_SUBTITLE:
subtitle = getCharacterData(event, eventReader);
break;
case ATOM_DESCRIPTION:
description = getCharacterData(event, eventReader);
break;
case ATOM_LINK:
if (event.isStartElement()) {
if(event.asStartElement().getAttributeByName(new QName("href")) != null) {
Attribute attribute = event.asStartElement().getAttributeByName(new QName("href"));
link = attribute.getValue();
}
}
break;
case ATOM_GUID:
guid = getCharacterData(event, eventReader);
break;
case ATOM_LANGUAGE:
language = getCharacterData(event, eventReader);
break;
case ATOM_AUTHOR:
author = getCharacterData(event, eventReader);
break;
case ATOM_PUB_DATE:
pubdate = getCharacterData(event, eventReader);
break;
case ATOM_COPYRIGHT:
copyright = getCharacterData(event, eventReader);
break;
}
} else if (event.isEndElement()) {
if (event.asEndElement().getName().getLocalPart() == (ATOM_ITEM)) {
FeedItem message = new FeedItem();
message.setAuthor(author);
message.setDescription(this.process(description));
message.setGuid(guid);
message.setLink(link);
message.setTitle(title);
message.setPubDate(pubdate);
feed.getFeedItems().add(message);
event = eventReader.nextEvent();
continue;
}
}
}
} catch (XMLStreamException e) {
throw new RuntimeException(e);
}
return feed;
}
private String getCharacterData(XMLEvent event, XMLEventReader eventReader)
throws XMLStreamException {
String result = "";
event = eventReader.nextEvent();
if (event instanceof Characters) {
result = event.asCharacters().getData();
}
return result;
}
protected void setPlainText(Boolean plain_text)
{
this.plain_text = plain_text;
}
}