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SMACK-286 Made ProviderManager much more configurable.

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Separated the reading of provider files from the ProviderManager.  Manager now only manages.  Added ability to add collections of providers to the manager via a ProviderLoader, of which there is one default implementation which loads from the default file format.  Now provider files can be programmatically added at any time.  Also updated the configuration abilities so that a provider file can also be set via VM arg, as well as the smack configuration itself. Introduced Java Util Logging as well.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_4_0@13861 b35dd754-fafc-0310-a699-88a17e54d16e
This commit is contained in:
rcollier 2014-01-16 05:14:39 +00:00
parent 7e3d4186bb
commit f155cb4d07
25 changed files with 1709 additions and 1000 deletions
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146
source/org/jivesoftware/smack/provider/ProviderFileLoader.java Normal file
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package org.jivesoftware.smack.provider;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.PacketExtension;
import org.xmlpull.mxp1.MXParser;
import org.xmlpull.v1.XmlPullParser;
/**
* Loads the {@link IQProvider} and {@link PacketExtensionProvider} information from a standard provider file in preparation
* for loading into the {@link ProviderManager}.
*
* @author Robin Collier
*
*/
public class ProviderFileLoader implements ProviderLoader {
private final static Logger log = Logger.getLogger(ProviderFileLoader.class.getName());
private Collection<IQProviderInfo> iqProviders;
private Collection<ExtensionProviderInfo> extProviders;
private InputStream providerStream;
public ProviderFileLoader(InputStream providerFileInputStream) {
setInputStream(providerFileInputStream);
}
public ProviderFileLoader() {
}
@Override
public Collection<IQProviderInfo> getIQProviderInfo() {
initialize();
return iqProviders;
}
@Override
public Collection<ExtensionProviderInfo> getExtensionProviderInfo() {
initialize();
return extProviders;
}
@SuppressWarnings("unchecked")
private synchronized void initialize() {
// Check to see if already initialized
if (iqProviders != null) {
return;
}
if (providerStream == null) {
throw new IllegalArgumentException("No input stream set for loader");
}
iqProviders = new ArrayList<IQProviderInfo>();
extProviders = new ArrayList<ExtensionProviderInfo>();
// Load processing providers.
try {
XmlPullParser parser = new MXParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
parser.setInput(providerStream, "UTF-8");
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
String typeName = parser.getName();
try {
if (!"smackProviders".equals(typeName)) {
parser.next();
parser.next();
String elementName = parser.nextText();
parser.next();
parser.next();
String namespace = parser.nextText();
parser.next();
parser.next();
String className = parser.nextText();
try {
// Attempt to load the provider class and then create
// a new instance if it's an IQProvider. Otherwise, if it's
// an IQ class, add the class object itself, then we'll use
// reflection later to create instances of the class.
if ("iqProvider".equals(typeName)) {
// Add the provider to the map.
Class<?> provider = Class.forName(className);
if (IQProvider.class.isAssignableFrom(provider)) {
iqProviders.add(new IQProviderInfo(elementName, namespace, (IQProvider) provider.newInstance()));
}
else if (IQ.class.isAssignableFrom(provider)) {
iqProviders.add(new IQProviderInfo(elementName, namespace, (Class<? extends IQ>)provider));
}
}
else {
// Attempt to load the provider class and then create
// a new instance if it's an ExtensionProvider. Otherwise, if it's
// a PacketExtension, add the class object itself and
// then we'll use reflection later to create instances
// of the class.
Class<?> provider = Class.forName(className);
if (PacketExtensionProvider.class.isAssignableFrom(provider)) {
extProviders.add(new ExtensionProviderInfo(elementName, namespace, (PacketExtensionProvider) provider.newInstance()));
}
else if (PacketExtension.class.isAssignableFrom(provider)) {
extProviders.add(new ExtensionProviderInfo(elementName, namespace, provider));
}
}
}
catch (ClassNotFoundException cnfe) {
log.log(Level.SEVERE, "Could not find provider class", cnfe);
}
}
}
catch (IllegalArgumentException illExc) {
log.log(Level.SEVERE, "Invalid provider type found [" + typeName + "] when expecting iqProvider or extensionProvider", illExc);
}
}
eventType = parser.next();
}
while (eventType != XmlPullParser.END_DOCUMENT);
}
catch (Exception e){
log.log(Level.SEVERE, "Unknown error occurred while parsing provider file", e);
}
finally {
try {
providerStream.close();
}
catch (Exception e) {
// Ignore.
}
}
}
public void setInputStream(InputStream providerFileInput) {
if (providerFileInput == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
providerStream = providerFileInput;
initialize();
}
}