FactoryFinderpublic class FactoryFinder extends Object
Methods Summary |
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static java.lang.Object | find(java.lang.String factoryId)Finds the implementation Class object for the given
factory name, or null if that fails.
This method is package private so that this code can be shared.
ClassLoader classLoader;
try {
classLoader = Thread.currentThread().getContextClassLoader();
} catch (Exception x) {
throw new SOAPException(x.toString(), x);
}
// Use the system property first
try {
String systemProp =
System.getProperty( factoryId );
if( systemProp!=null) {
return newInstance(systemProp, classLoader);
}
} catch (SecurityException se) {
}
// try to read from $java.home/lib/jaxm.properties
try {
String javah=System.getProperty( "java.home" );
String configFile = javah + File.separator +
"lib" + File.separator + "jaxm.properties";
File f=new File( configFile );
if( f.exists()) {
Properties props=new Properties();
props.load( new FileInputStream(f));
String factoryClassName = props.getProperty(factoryId);
return newInstance(factoryClassName, classLoader);
}
} catch(Exception ex ) {
}
String serviceId = "META-INF/services/" + factoryId;
// try to find services in CLASSPATH
try {
InputStream is=null;
if (classLoader == null) {
is=ClassLoader.getSystemResourceAsStream(serviceId);
} else {
is=classLoader.getResourceAsStream(serviceId);
}
if( is!=null ) {
BufferedReader rd =
new BufferedReader(new InputStreamReader(is, "UTF-8"));
String factoryClassName = rd.readLine();
rd.close();
if (factoryClassName != null &&
! "".equals(factoryClassName)) {
return newInstance(factoryClassName, classLoader);
}
}
} catch( Exception ex ) {
}
return null;
| static java.lang.Object | find(java.lang.String factoryId, java.lang.String fallbackClassName)Finds the implementation Class object for the given
factory name, or if that fails, finds the Class object
for the given fallback class name. The arguments supplied must be
used in order. If using the first argument is successful, the second
one will not be used.
This method is package private so that this code can be shared.
Object obj = find(factoryId);
if (obj != null)
return obj;
ClassLoader classLoader;
try {
classLoader = Thread.currentThread().getContextClassLoader();
} catch (Exception x) {
throw new SOAPException(x.toString(), x);
}
if (fallbackClassName == null) {
throw new SOAPException(
"Provider for " + factoryId + " cannot be found", null);
}
return newInstance(fallbackClassName, classLoader);
| private static java.lang.Object | newInstance(java.lang.String className, java.lang.ClassLoader classLoader)Creates an instance of the specified class using the specified
ClassLoader object.
try {
Class spiClass;
if (classLoader == null) {
spiClass = Class.forName(className);
} else {
spiClass = classLoader.loadClass(className);
}
return spiClass.newInstance();
} catch (ClassNotFoundException x) {
throw new SOAPException(
"Provider " + className + " not found", x);
} catch (Exception x) {
throw new SOAPException(
"Provider " + className + " could not be instantiated: " + x,
x);
}
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