Package org.apache.commons.discovery.tools

Examples of org.apache.commons.discovery.tools.DiscoverClass

  • If the name of the implementation class is non-null, load that class. The class loaded is the first class loaded by the following sequence of class loaders: An exception is thrown if the class cannot be loaded.

  • If the name of the implementation class is null, AND the default implementation class name (defaultImpl) is null, then an exception is thrown.

  • If the name of the implementation class is null, AND the default implementation class (defaultImpl) is non-null, then load the default implementation class. The class loaded is the first class loaded by the following sequence of class loaders:

    This limits the scope in which the default class loader can be found to the SPI, DiscoverSingleton, and System class loaders. The assumption here is that the default implementation is closely associated with the SPI or system, and is not defined in the user's application space.

    An exception is thrown if the class cannot be loaded.

  • Verify that the loaded class implements the SPI: an exception is thrown if the loaded class does not implement the SPI.

    • IMPLEMENTATION NOTE - This implementation is modelled after the SAXParserFactory and DocumentBuilderFactory implementations (corresponding to the JAXP pluggability APIs) found in Apache Xerces.

    @version $Revision: 1090010 $ $Date: 2011-04-07 23:05:58 +0200 (Thu, 07 Apr 2011) $
    337
    338
    339
    340
    341
    342
    343
    344
    345
    346
    347
    348
        public void testViaDiscoverClass() {
            org.apache.commons.discovery.log.SimpleLog.setLevel(logLevel);

            ClassLoaders loaders = ClassLoaders.getAppLoaders(TestInterface2.class, getClass(), false);
           
            DiscoverClass discover = new DiscoverClass(loaders);
            Class implClass = discover.find(TestInterface2.class);
           
            assertTrue("Failed to find an implementation class", implClass != null);
            assertEquals("org.apache.commons.discovery.test.TestImpl2_1", implClass.getName());
           
        }
    View Full Code Here
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
            _controlIntf = controlIntf;

            // Create the context that acts as the BeanContextProxy for this bean (the context that this bean _defines_).
            try
            {
                DiscoverClass discoverer = new DiscoverClass();
                Class factoryClass = discoverer.find(ControlBeanContextFactory.class, DefaultControlBeanContextFactory.class.getName());
                ControlBeanContextFactory factory = (ControlBeanContextFactory)factoryClass.newInstance();
                _cbc = factory.instantiate(this);
            }
            catch (Exception e) {
                throw new ControlException("Exception creating ControlBeanContext", e);
    View Full Code Here
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
                                                             ControlBeanContext context,
                                                             String id )
        {
            try
            {
                DiscoverClass discoverer = new DiscoverClass();
                Class factoryClass = discoverer.find( ControlFactory.class, DEFAULT_FACTORY_CLASS );
                ControlFactory factory = (ControlFactory)factoryClass.newInstance();
                return factory.instantiate( beanClass, props, context, id );
            }
            catch ( Exception e )
            {
    View Full Code Here
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
         * @return a new factory.
         */
        public static DescriptiveStatistics newInstance() {
            DescriptiveStatistics factory = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                factory = (DescriptiveStatistics) dc.newInstance(
                    DescriptiveStatistics.class,
                    "org.apache.commons.math.stat.descriptive.DescriptiveStatisticsImpl");
            } catch(Throwable t) {
                return new DescriptiveStatisticsImpl();
            }
    View Full Code Here
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
         * @return a new factory.
         */
        public static DistributionFactory newInstance() {
            DistributionFactory factory = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                factory = (DistributionFactory) dc.newInstance(
                    DistributionFactory.class,
                    "org.apache.commons.math.distribution.DistributionFactoryImpl");
            } catch(Throwable t) {
                return new DistributionFactoryImpl();
            }
    View Full Code Here
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
         * @return a new SummaryStatistics instance.
         */
        public static SummaryStatistics newInstance() {
            SummaryStatistics instance = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                instance = (SummaryStatistics) dc.newInstance(
                    SummaryStatistics.class,
                    "org.apache.commons.math.stat.descriptive.SummaryStatisticsImpl");
            } catch(Throwable t) {
                return new SummaryStatisticsImpl();
            }
    View Full Code Here
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
         * @return a new factory.
         */
        public static UnivariateRealSolverFactory newInstance() {
            UnivariateRealSolverFactory factory = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                factory = (UnivariateRealSolverFactory) dc.newInstance(
                    UnivariateRealSolverFactory.class,
                    "org.apache.commons.math.analysis.UnivariateRealSolverFactoryImpl");
            } catch(Throwable t) {
                return new UnivariateRealSolverFactoryImpl();
            }
    View Full Code Here
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
       * @return a new factory.
       */
      public static DescriptiveStatistics newInstance() {
        DescriptiveStatistics factory = null;
        try {
          DiscoverClass dc = new DiscoverClass();
          factory = (DescriptiveStatistics) dc.newInstance(
            DescriptiveStatistics.class,
            "org.apache.commons.math.stat.DescriptiveStatisticsImpl");
        } catch(Exception ex) {
          // ignore as default implementation will be used.
        }
    View Full Code Here
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
         * @return a new factory.
         */
        public static DistributionFactory newInstance() {
            DistributionFactory factory = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                factory = (DistributionFactory) dc.newInstance(
                    DistributionFactory.class,
                    "org.apache.commons.math.distribution.DistributionFactoryImpl");
            } catch(Exception ex) {
                // ignore as default implementation will be used.
            }
    View Full Code Here
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
         * @return a new factory.
         */
        public static UnivariateRealSolverFactory newInstance() {
            UnivariateRealSolverFactory factory = null;
            try {
                DiscoverClass dc = new DiscoverClass();
                factory = (UnivariateRealSolverFactory) dc.newInstance(
                    UnivariateRealSolverFactory.class,
                    "org.apache.commons.math.analysis.UnivariateRealSolverFactoryImpl");
            } catch(Exception ex) {
                // ignore as default implementation will be used.
            }
    View Full Code Here
    TOP

    Related Classes of org.apache.commons.discovery.tools.DiscoverClass

  • org.apache.beehive.controls.api.bean.Controls
  • org.apache.beehive.controls.runtime.bean.ControlBean
  • org.apache.commons.discovery.listeners.FirstResourceClassListener
  • org.apache.commons.discovery.resource.classes.DiscoverClasses
  • org.apache.commons.discovery.resource.names.DiscoverServiceNames
  • org.apache.commons.discovery.ResourceClass
  • org.apache.commons.discovery.ResourceClassIterator
  • org.apache.commons.discovery.ResourceNameIterator
  • org.apache.commons.discovery.test.TestAll
  • org.apache.commons.math.analysis.UnivariateRealSolverFactory
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.