WaveEmbeddedProvider.java

package org.springframework.roo.addon.web.mvc.embedded.provider;

import java.util.HashMap;
import java.util.Map;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.addon.web.mvc.embedded.AbstractEmbeddedProvider;
import org.springframework.roo.support.util.XmlElementBuilder;
import org.springframework.roo.support.util.XmlRoundTripUtils;
import org.springframework.roo.support.util.XmlUtils;
import org.w3c.dom.Element;

/**
 * Provider to embed a Google wave via a URL or specific install method.
 * 
 * @author Stefan Schmidt
 * @since 1.1
 */
@Component
@Service
public class WaveEmbeddedProvider extends AbstractEmbeddedProvider {

  public boolean embed(final String url, final String viewName) {
    // Expected format
    // https://wave.google.com/wave/#restored:wave:googlewave.com%252Fw%252B8Hj0sgUxC
    if (url.contains("wave.google.")) {
      final String qStart = url.substring(url.indexOf("%252B") + 5);
      final Map<String, String> options = new HashMap<String, String>();
      options.put("provider", "GOOGLE_WAVE");
      options.put("id",
          qStart.substring(0, !qStart.contains(".") ? qStart.length() : qStart.indexOf(".")));
      return install(viewName, options);
    }
    return false;
  }

  public boolean install(final String viewName, final Map<String, String> options) {
    if (options == null || options.size() != 2 || !options.containsKey("provider")
        || !options.get("provider").equalsIgnoreCase("GOOGLE_WAVE") || !options.containsKey("id")) {
      return false;
    }
    final String id = options.get("id");
    installTagx("wave");
    final Element wave =
        new XmlElementBuilder("embed:wave", XmlUtils.getDocumentBuilder().newDocument())
            .addAttribute("id", "wave_" + id).addAttribute("waveId", id).build();
    wave.setAttribute("z", XmlRoundTripUtils.calculateUniqueKeyFor(wave));
    installJspx(getViewName(viewName, options.get("provider").toLowerCase()), null, wave);
    return true;
  }
}