Examples of org.apache.commons.discovery.ResourceClass.loadClass()

Class org.apache.commons.discovery.ResourceClass

Examples of org.apache.commons.discovery.ResourceClass.loadClass()

org.apache.commons.discovery.ResourceClass.loadClass()
Get the value of resourceClass. Loading the class does NOT guarentee that the class can be instantiated. Go figure. The class can be instantiated when the class is linked/resolved, and all dependencies are resolved. Various JDKs do this at different times, so beware: java.lang.NoClassDefFoundError when calling Class.getDeclaredMethod() (JDK14), java.lang.reflect.InvocationTargetException (wrapping java.lang.NoClassDefFoundError) when calling java.lang.newInstance (JDK13), and who knows what else.. @param < S> Any type extends T @return value of resourceClass.

            
            // If it's set as a property.. it had better be there!
            if (classes.hasNext()) {
                ResourceClass info = classes.nextResourceClass();
                try {
                    return info.loadClass();
                } catch (Exception e) {
                    // ignore
                }
            }
        } else {

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            // Services we iterate through until we find one that loads..
            while (classes.hasNext()) {
                ResourceClass info = classes.nextResourceClass();
                try {
                    return info.loadClass();
                } catch (Exception e) {
                    // ignore
                }
            }
        }

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            DiscoverClasses classDiscovery = new DiscoverClasses(loaders);
            ResourceClassIterator classes = classDiscovery.findResourceClasses(getDefaultName());
            if (classes.hasNext()) {
                ResourceClass info = classes.nextResourceClass();
                try {
                    defaultClass = info.loadClass();
                } catch (Exception e) {
                    // ignore
                }
            }
        }

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        DiscoverClasses discovery = new DiscoverClasses(loaders);
        ResourceClassIterator iter = discovery.findResourceClasses(name);
        while (iter.hasNext()) {
            ResourceClass resource = iter.nextResourceClass();
            try {                
                Class implClass = resource.loadClass();
                if ( implClass != null ) {
                    assertEquals("org.apache.commons.discovery.test.TestImpl2_1", implClass.getName());
                    return;
                }
            }

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            private Object getNextClassInstance() {
                while (services.hasNext()) {
                    ResourceClass info = services.nextResourceClass();
                    try {
                        return spi.newInstance(info.loadClass());
                    } catch (Exception e) {
                        // ignore
                    }
                }
                return null;

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        if (classNames.length > 0) {
            classDiscovery.find(classNames[0]);


            // If it's set as a property.. it had better be there!
            ResourceClass resource = listener.getFirst();
            return (resource == null) ? null : resource.loadClass();
        } else {
            DiscoverServiceNames discoverServices = new DiscoverServiceNames(loaders);
    
            /**
             * Feed service (name) discovery to classDiscovery

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            discoverServices.setListener(classDiscovery);


            discoverServices.find(spi.getSPName());
            ResourceClass resource = listener.getFirst();


            Class clazz = (resource == null) ? null : resource.loadClass();


            if (clazz != null) {
                return clazz;
            }

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            private Object getNextClassInstance() {
                while (services.hasNext()) {
                    ResourceClass info = services.nextResourceClass();
                    try {
                        return spi.newInstance(info.loadClass());
                    } catch (Exception e) {
                        // ignore
                    }
                }
                return null;

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            // If it's set as a property.. it had better be there!
            if (classes.hasNext()) {
                ResourceClass info = classes.nextResourceClass();
                try {
                    return info.loadClass();
                } catch (Exception e) {
                    // ignore
                }
            }
        } else {

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            // Services we iterate through until we find one that loads..
            while (classes.hasNext()) {
                ResourceClass info = classes.nextResourceClass();
                try {
                    return info.loadClass();
                } catch (Exception e) {
                    // ignore
                }
            }
        }

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