MapEmbeddedProvider.java

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

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
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 maps via a URL or specific install method.
 * 
 * @author Stefan Schmidt
 * @since 1.1
 */
@Component
@Service
public class MapEmbeddedProvider extends AbstractEmbeddedProvider {

  public boolean embed(final String url, final String viewName) {
    if (url.contains("maps.google")) {
      // Expected format
      // http://maps.google.com/maps?q=sydney,+Australia&.. the q= param
      // needs to be present
      final String qStart = url.substring(url.indexOf("q=") + 2);

      final Map<String, String> options = new HashMap<String, String>();
      options.put("provider", "GOOGLE_MAPS");
      options.put("location",
          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_MAPS")
        || !options.containsKey("location")) {
      return false;
    }
    String location = options.get("location");
    try {
      location = URLDecoder.decode(location, "UTF-8");
    } catch (final UnsupportedEncodingException ignore) {
    }
    installTagx("map");
    final Element map =
        new XmlElementBuilder("embed:map", XmlUtils.getDocumentBuilder().newDocument())
            .addAttribute("id", "map_" + viewName).addAttribute("location", location).build();
    map.setAttribute("z", XmlRoundTripUtils.calculateUniqueKeyFor(map));
    installJspx(getViewName(viewName, options.get("provider").toLowerCase()), null, map);
    return true;
  }
}