FileConverterComponent.java

package org.springframework.roo.converters;

import java.io.File;
import java.util.logging.Logger;
import org.apache.commons.lang3.Validate;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.shell.Shell;
import org.springframework.roo.converters.FileConverter;
import org.osgi.service.component.ComponentContext;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.springframework.roo.support.logging.HandlerUtils;


/**
 * OSGi component launcher for {@link FileConverter}.
 * 
 * @author Ben Alex
 * @since 1.1
 */
@Component
@Service
public class FileConverterComponent extends FileConverter {

  private Shell shell;

  protected final static Logger LOGGER = HandlerUtils.getLogger(FileConverterComponent.class);

  // ------------ OSGi component attributes ----------------
  private BundleContext context;

  protected void activate(final ComponentContext context) {
    this.context = context.getBundleContext();
  }

  @Override
  protected File getWorkingDirectory() {
    if (shell == null) {
      shell = getShell();
    }
    Validate.notNull(shell, "Shell required");
    return shell.getHome();
  }

  public Shell getShell() {
    // Get all Services implement Shell interface
    try {
      ServiceReference<?>[] references =
          this.context.getAllServiceReferences(Shell.class.getName(), null);

      for (ServiceReference<?> ref : references) {
        return (Shell) this.context.getService(ref);
      }

      return null;

    } catch (InvalidSyntaxException e) {
      LOGGER.warning("Cannot load Shell on DefaultFileManager.");
      return null;
    }
  }

}