Examples of org.bladerunnerjs.plugin.Plugin

org.bladerunnerjs.plugin.Plugin

oracle.com/javase/tutorial/sound/SPI-intro.html">SPI Mechanism introduced in Java 6), and are constructed using a zero-arg constructor. The {@link #setBRJS setBRJS()} method is used in lieu of a parameterized constructor, and is invoked before any non-identifier methods(see below).

Because plug-ins form part of the model, yet use the model to initialize themselves, an untenable circular dependency exists. To overcome this problem, each concrete plug-in instance is wrapped inside a virtual proxy that delays plug-in initialization until somebody attempts to actually use the plug-in. Since code interested in interacting with a subset of the plug-ins will often need to query all of them to locate the ones it needs, certain identifier-methods are proxied through before the object's {@link #setBRJS setBRJS()} method has been invoked, which plug-in authors must be aware of.

Another consequence of wrapping all plug-ins in a virtual proxy is that the instanceof operator and the Object.getClass() method do not work as expected. The {@link #instanceOf instanceOf()} and {@link #getPluginClass} methods are provided to overcome these deficiencies.

  }
  
  @Override
  public boolean equals(Object object)
  {
    Plugin otherPlugin = (object instanceof VirtualProxyPlugin) ? ((VirtualProxyPlugin) object).plugin : (Plugin) object;
    
    return plugin == otherPlugin;
  }

 * details). Since this class is abstract, developers will need to extend one of this classes sub-classes to make use of this functionality.
 */
public abstract class AbstractPlugin implements Plugin {
  @Override
  public boolean equals(Object object) {
    Plugin plugin = (object instanceof VirtualProxyPlugin) ? ((VirtualProxyPlugin) object).getUninitializedUnderlyingPlugin() : (Plugin) object;
    
    return this == plugin;
  }

import org.junit.Test;


public class VirtualProxyPluginTest {
  @Test
  public void instanceOfWorks() {
    Plugin plugin = new VirtualProxyPlugin(new MyTestPlugin());
    
    assertTrue("1", plugin.instanceOf(MyTestPlugin.class));
    assertTrue("2", plugin.instanceOf(TestPlugin.class));
  }

    assertTrue("2", plugin.instanceOf(TestPlugin.class));
  }
  
  @Test
  public void equalityWorks() {
    Plugin plugin = new MyTestPlugin();
    Plugin proxyPlugin = new VirtualProxyPlugin(plugin);
    
    assertTrue("1", plugin.equals(plugin));
    assertTrue("2", proxyPlugin.equals(proxyPlugin));
    assertTrue("3", proxyPlugin.equals(plugin));
    assertTrue("4", plugin.equals(proxyPlugin));
  }

Examples of org.bladerunnerjs.plugin.Plugin

Related Classes of org.bladerunnerjs.plugin.Plugin