Package org.apache.commons.discovery

Examples of org.apache.commons.discovery.ResourceClassIterator

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        }
       
        ResourceNameIterator servicesIter =
            (new DiscoverServiceNames(loaders)).findResourceNames(spi.getSPName());

        final ResourceClassIterator services =
            (new DiscoverClasses(loaders)).findResourceClasses(servicesIter);
       
        return new Enumeration() {
            private Object object = null;
           
            public boolean hasMoreElements() {
                if (object == null) {
                    object = getNextClassInstance();
                }
                return object != null;
            }
           
            public Object nextElement() {
                Object obj = object;
                object = null;
                return obj;
            }

            private Object getNextClassInstance() {
                while (services.hasNext()) {
                    ResourceClass info = services.nextResourceClass();
                    try {
                        return spi.newInstance(info.loadClass());
                    } catch (Exception e) {
                        // ignore
                    }
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        final String resourceName = className.replace('.','/') + ".class";
       
        if (log.isDebugEnabled())
            log.debug("find: className='" + className + "'");

        return new ResourceClassIterator() {
            private Vector history = new Vector();
            private int idx = 0;
            private ResourceClass resource = null;
           
            public boolean hasNext() {
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     * Locate class resources that are bound to <code>resourceNames</code>.
     *
     * @return ResourceIterator
     */
    public ResourceClassIterator findResourceClasses(final ResourceNameIterator inputNames) {
        return new ResourceClassIterator() {
            private ResourceClassIterator classes = null;
            private ResourceClass resource = null;
           
            public boolean hasNext() {
                if (resource == null) {
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        String[] classNames = discoverClassNames(spi, props);
       
        if (classNames.length > 0) {
            DiscoverClasses classDiscovery = new DiscoverClasses(loaders);
           
            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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     *         (this forces the check, no way out..).
     */
    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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        ClassLoaders loaders = ClassLoaders.getAppLoaders(TestInterface2.class, getClass(), false);
        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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                                     final Class constructorParamTypes[],
                                     final Object constructorParams[]) {
        return AccessController.doPrivileged(
            new PrivilegedAction() {
                public Object run() {
                    ResourceClassIterator services = getResourceClassIterator(spiClass);

                    Object obj = null;
                    while (obj == null  &&  services.hasNext()) {
                        Class service = services.nextResourceClass().loadClass();

                        /* service == null
                         * if class resource wasn't loadable
                         */
                        if (service != null) {
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        final String resourceName = className.replace('.','/') + ".class";
       
        if (log.isDebugEnabled())
            log.debug("find: className='" + className + "'");

        return new ResourceClassIterator() {
            private Vector history = new Vector();
            private int idx = 0;
            private ResourceClass resource = null;
           
            public boolean hasNext() {
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                                     final Class constructorParamTypes[],
                                     final Object constructorParams[]) {
        return AccessController.doPrivileged(
            new PrivilegedAction() {
                public Object run() {
                    ResourceClassIterator services = getResourceClassIterator(spiClass);
           
                    Object obj = null;
                    while (obj == null  &&  services.hasNext()) {
                        Class service = services.nextResourceClass().loadClass();
           
                        /* service == null
                         * if class resource wasn't loadable
                         */
                        if (service != null) {
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        catch (Exception e) {
            log.error( "Could not load service: " + name );
        }
        return answer;
*/
        ResourceClassIterator iter = discovery.findResourceClasses(name);
        while (iter.hasNext()) {
            ResourceClass resource = iter.nextResourceClass();
            try {
                Class typeClass = resource.loadClass();
                if ( typeClass != null ) {
                    return newInstance(uri, typeClass);
                }
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  • org.apache.commons.discovery.resource.classes.DiscoverClasses
  • org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl
  • org.apache.commons.discovery.test.TestAll
  • org.apache.commons.discovery.tools.DefaultClassHolder
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  • org.apache.commons.jelly.impl.DefaultTagLibraryResolver
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