DefaultActionLocator.java

package org.springframework.roo.addon.tailor.service;

import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.felix.scr.annotations.ReferenceStrategy;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.addon.tailor.actions.Action;

/**
 * Locates all available actions => all OSGi Services of type {@link Action}
 * 
 * @author Vladimir Tihomirov
 */
@Component
@Service
@Reference(name = "action", strategy = ReferenceStrategy.EVENT, policy = ReferencePolicy.DYNAMIC,
    referenceInterface = Action.class, cardinality = ReferenceCardinality.OPTIONAL_MULTIPLE)
public class DefaultActionLocator implements ActionLocator {

  /**
   * A map of all the actions found in the OSGi container. Bound dynamically
   * by Felix, keys are the simple class names in lower case, values the
   * respective OSGi services.
   */
  private final Map<String, Action> actionsMap = new LinkedHashMap<String, Action>();

  public Action getAction(final String caseInsensitiveKey) {
    return actionsMap.get(caseInsensitiveKey.toLowerCase());
  }

  public Map<String, Action> getAllActions() {
    return actionsMap;
  }

  protected void bindAction(final Action action) {
    final String actionClassName = action.getClass().getSimpleName().toLowerCase();
    actionsMap.put(actionClassName, action);
  }

  protected void unbindAction(final Action action) {
    final String actionClassName = action.getClass().getSimpleName().toLowerCase();
    actionsMap.remove(actionClassName);
  }

}