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parse XML directly from input stream

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git-svn-id: https://public-transport-enabler.googlecode.com/svn/trunk@271 0924bc21-9374-b0fa-ee44-9ff1593b38f0
This commit is contained in:
andreas.schildbach 2010-10-10 14:29:50 +00:00
parent 8e19081ca9
commit a3ad65eabe
3 changed files with 96 additions and 27 deletions
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93
src/de/schildbach/pte/AbstractEfaProvider.java
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@ -19,7 +19,8 @@ package de.schildbach.pte;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.StringReader;
import java.io.InputStream;
import java.net.SocketTimeoutException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
@ -54,20 +55,24 @@ import de.schildbach.pte.util.XmlPullUtil;
*/
public abstract class AbstractEfaProvider implements NetworkProvider
{
private static final String DEFAULT_ENCODING = "ISO-8859-1";
protected abstract String autocompleteUri(final CharSequence constraint);
public List<Location> autocompleteStations(final CharSequence constraint) throws IOException
{
final String uri = autocompleteUri(constraint);
InputStream is = null;
try
{
final CharSequence page = ParserUtils.scrape(uri);
is = ParserUtils.scrapeInputStream(uri);
final List<Location> results = new ArrayList<Location>();
final XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
final XmlPullParser pp = factory.newPullParser();
pp.setInput(new StringReader(page.toString()));
pp.setInput(is, DEFAULT_ENCODING);
// parse odv name elements
XmlPullUtil.jumpToStartTag(pp, null, "itdOdv");
@ -99,6 +104,15 @@ public abstract class AbstractEfaProvider implements NetworkProvider
{
throw new RuntimeException(x);
}
catch (final SocketTimeoutException x)
{
throw new RuntimeException(x);
}
finally
{
if (is != null)
is.close();
}
}
private Location processOdvNameElem(final XmlPullParser pp) throws XmlPullParserException, IOException
@ -168,8 +182,6 @@ public abstract class AbstractEfaProvider implements NetworkProvider
return new Location(LocationType.STATION, id, lat, lon, name);
}
private static final Pattern P_NEARBY_MESSAGES = Pattern.compile("(unsere Server zur Zeit ausgelastet)");
protected abstract String nearbyLatLonUri(int lat, int lon);
protected abstract String nearbyStationUri(String stationId);
@ -185,16 +197,14 @@ public abstract class AbstractEfaProvider implements NetworkProvider
if (uri == null)
throw new IllegalArgumentException("at least one of stationId or lat/lon must be given");
InputStream is = null;
try
{
final CharSequence page = ParserUtils.scrape(uri);
if (P_NEARBY_MESSAGES.matcher(page).find())
return new NearbyStationsResult(uri, NearbyStationsResult.Status.SERVICE_DOWN);
is = ParserUtils.scrapeInputStream(uri);
final XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
final XmlPullParser pp = factory.newPullParser();
pp.setInput(new StringReader(page.toString()));
pp.setInput(is, DEFAULT_ENCODING);
XmlPullUtil.jumpToStartTag(pp, null, "itdOdvName");
final String nameState = pp.getAttributeValue(null, "state");
@ -274,6 +284,15 @@ public abstract class AbstractEfaProvider implements NetworkProvider
{
return new NearbyStationsResult(uri, NearbyStationsResult.Status.SERVICE_DOWN);
}
catch (final SocketTimeoutException x)
{
return new NearbyStationsResult(uri, NearbyStationsResult.Status.SERVICE_DOWN);
}
finally
{
if (is != null)
is.close();
}
}
private static final Pattern P_LINE_IRE = Pattern.compile("IRE\\d+");
@ -533,13 +552,14 @@ public abstract class AbstractEfaProvider implements NetworkProvider
public QueryDeparturesResult queryDepartures(final String uri) throws IOException
{
InputStream is = null;
try
{
final CharSequence page = ParserUtils.scrape(uri);
is = ParserUtils.scrapeInputStream(uri);
final XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
final XmlPullParser pp = factory.newPullParser();
pp.setInput(new StringReader(page.toString()));
pp.setInput(is, DEFAULT_ENCODING);
XmlPullUtil.jumpToStartTag(pp, null, "itdOdvName");
final String nameState = pp.getAttributeValue(null, "state");
@ -602,6 +622,15 @@ public abstract class AbstractEfaProvider implements NetworkProvider
{
return new QueryDeparturesResult(uri, QueryDeparturesResult.Status.SERVICE_DOWN);
}
catch (final SocketTimeoutException x)
{
return new QueryDeparturesResult(uri, QueryDeparturesResult.Status.SERVICE_DOWN);
}
finally
{
if (is != null)
is.close();
}
}
private void processItdDateTime(final XmlPullParser pp, final Calendar calendar) throws XmlPullParserException, IOException
@ -654,25 +683,49 @@ public abstract class AbstractEfaProvider implements NetworkProvider
{
final String uri = connectionsQueryUri(from, via, to, date, dep, products, walkSpeed) + "&sessionID=0";
final CharSequence page = ParserUtils.scrape(uri);
return queryConnections(uri, page);
InputStream is = null;
try
{
is = ParserUtils.scrapeInputStream(uri);
return queryConnections(uri, is);
}
catch (final SocketTimeoutException x)
{
return new QueryConnectionsResult(QueryConnectionsResult.Status.SERVICE_DOWN);
}
finally
{
if (is != null)
is.close();
}
}
public QueryConnectionsResult queryMoreConnections(final String uri) throws IOException
{
final CharSequence page = ParserUtils.scrape(uri);
return queryConnections(uri, page);
InputStream is = null;
try
{
is = ParserUtils.scrapeInputStream(uri);
return queryConnections(uri, is);
}
catch (final SocketTimeoutException x)
{
return new QueryConnectionsResult(QueryConnectionsResult.Status.SERVICE_DOWN);
}
finally
{
if (is != null)
is.close();
}
}
private QueryConnectionsResult queryConnections(final String uri, final CharSequence page) throws IOException
private QueryConnectionsResult queryConnections(final String uri, final InputStream is) throws IOException
{
try
{
final XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
final XmlPullParser pp = factory.newPullParser();
pp.setInput(new StringReader(page.toString()));
pp.setInput(is, DEFAULT_ENCODING);
if (!XmlPullUtil.jumpToStartTag(pp, null, "itdRequest"))
throw new IllegalStateException("cannot find <itdRequest />");