Examples of org.apache.commons.discovery.ResourceClass

org.apache.commons.discovery.ResourceClass
'Resource' located by discovery. Naming of methods becomes a real pain ('getClass()') so I've patterned this after ClassLoader... I think it works well as it will give users a point-of-reference. @param < T> The SPI type

            ResourceClassIterator classes =
                classDiscovery.findResourceClasses(classNames[0]);
            
            // 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 {
            ResourceNameIterator classIter =
                (new DiscoverServiceNames(loaders)).findResourceNames(spi.getSPName());


            ResourceClassIterator classes =
                (new DiscoverClasses(loaders)).findResourceClasses(classIter);
                
            
            if (!classes.hasNext()  &&  defaultImpl != null) {
                return defaultImpl.getDefaultClass(spi, loaders);
            }
            
            // 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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    public Class getDefaultClass(SPInterface spi, ClassLoaders loaders) {
        if (defaultClass == null) {
            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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        String name = "org.apache.commons.discovery.test.TestImpl2_1";
        
        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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                return obj;
            }


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

View Full Code Here

                }
                return resource != null;
            }
            
            public ResourceClass nextResourceClass() {
                ResourceClass rsrc = resource;
                resource = null;
                return rsrc;
            }
            
            private ResourceClass getNextResource() {

View Full Code Here

                }
                return resource != null;
            }
            
            public ResourceClass nextResourceClass() {
                ResourceClass element = resource;
                resource = null;
                return element;
            }
            
            private ResourceClass getNextClass() {
                while (idx < getClassLoaders().size()) {
                    ClassLoader loader = getClassLoaders().get(idx++);
                    URL url = loader.getResource(resourceName);
                    if (url != null) {
                        if (!history.contains(url)) {
                            history.addElement(url);
    
                            if (log.isDebugEnabled())
                                log.debug("getNextClass: next URL='" + url + "'");
    
                            return new ResourceClass(className, url, loader);
                        }
                        if (log.isDebugEnabled())
                            log.debug("getNextClass: duplicate URL='" + url + "'");
                    } else {
                        if (log.isDebugEnabled())

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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
             */
            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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                return obj;
            }


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

View Full Code Here

                }
                return resource != null;
            }
            
            public ResourceClass nextResourceClass() {
                ResourceClass element = resource;
                resource = null;
                return element;
            }
            
            private ResourceClass getNextClass() {
                while (idx < getClassLoaders().size()) {
                    ClassLoader loader = getClassLoaders().get(idx++);
                    URL url = loader.getResource(resourceName);
                    if (url != null) {
                        if (!history.contains(url)) {
                            history.addElement(url);
    
                            if (log.isDebugEnabled())
                                log.debug("getNextClass: next URL='" + url + "'");
    
                            return new ResourceClass(className, url, loader);
                        }
                        if (log.isDebugEnabled())
                            log.debug("getNextClass: duplicate URL='" + url + "'");
                    } else {
                        if (log.isDebugEnabled())

View Full Code Here

                }
                return resource != null;
            }
            
            public ResourceClass nextResourceClass() {
                ResourceClass rsrc = resource;
                resource = null;
                return rsrc;
            }
            
            private ResourceClass getNextResource() {

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