jaxp-api-1.3/src/main/java/javax/xml/xpath/XPathFactoryFinder.java [260:282]:
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    private XPathFactory createInstance( String className ) {
        try {
            if (debug) debugPrintln("instanciating "+className);
            Class clazz;
            if( classLoader!=null )
                clazz = classLoader.loadClass(className);
            else
                clazz = Class.forName(className);
            if(debug)       debugPrintln("loaded it from "+which(clazz));
            Object o = clazz.newInstance();
            
            if( o instanceof XPathFactory )
                return (XPathFactory)o;
            
            if (debug) debugPrintln(className+" is not assignable to "+SERVICE_CLASS.getName());
        } catch( Throwable t ) {
            if (debug) {
                debugPrintln("failed to instanciate "+className);
                t.printStackTrace();
            }
        }
        return null;
    }
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jaxp-api-1.4/src/main/java/javax/xml/xpath/XPathFactoryFinder.java [265:287]:
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     XPathFactory createInstance( String className ) {
        try {
            if (debug) debugPrintln("instanciating "+className);
            Class clazz;
            if( classLoader!=null )
                clazz = classLoader.loadClass(className);
            else
                clazz = Class.forName(className);
            if(debug)       debugPrintln("loaded it from "+which(clazz));
            Object o = clazz.newInstance();
            
            if( o instanceof XPathFactory )
                return (XPathFactory)o;
            
            if (debug) debugPrintln(className+" is not assignable to "+SERVICE_CLASS.getName());
        } catch( Throwable t ) {
            if (debug) {
                debugPrintln("failed to instanciate "+className);
                t.printStackTrace();
            }
        }
        return null;
    }
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