+ return new SimpleFieldSetConstructor(shortLived);
+ }
+
+ }
+
+ /**
+ * Container for identifying plugins. Plugins are identified by their plugin
+ * name and their unique identifier.
+ */
+ private static class PluginIdentifier {
+
+ /** The plugin name. */
+ private final String pluginName;
+
+ /** The plugin identifier. */
+ private final String identifier;
+
+ /**
+ * Creates a new plugin identifier.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the plugin
+ */
+ public PluginIdentifier(String pluginName, String identifier) {
+ this.pluginName = pluginName;
+ this.identifier = identifier;
+ }
+
+ //
+ // OBJECT METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public int hashCode() {
+ return pluginName.hashCode() ^ identifier.hashCode();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean equals(Object object) {
+ if (!(object instanceof PluginIdentifier)) {
+ return false;
+ }
+ PluginIdentifier pluginIdentifier = (PluginIdentifier) object;
+ return pluginName.equals(pluginIdentifier.pluginName) && identifier.equals(pluginIdentifier.identifier);