Android Open Source - Mamytas Abstract Rest Method

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License

The source code is released under:

GNU General Public License

Java Source Code

package mn.aug.restfulandroid.rest;
//  w  w w  .ja  v a 2  s. c  o  m
import java.util.List;
import java.util.Map;

import android.content.Context;

import mn.aug.restfulandroid.rest.resource.Resource;
import mn.aug.restfulandroid.security.AuthorizationManager;
import mn.aug.restfulandroid.security.RequestSigner;
import mn.aug.restfulandroid.util.Logger;


public abstract class AbstractRestMethod<T extends Resource> implements RestMethod<T> {

  private static final String DEFAULT_ENCODING = "UTF-8";
    private Request request;

  public RestMethodResult<T> execute() {

    request = buildRequest();
    if (requiresAuthorization()) {
      RequestSigner signer = AuthorizationManager.getInstance(getContext());
      signer.authorize(request);
    }
    Response response = doRequest(request);
    return buildResult(response);
  }
  
  protected abstract Context getContext();

  /**
   * Subclasses can overwrite for full control, eg. need to do special
   * inspection of response headers, etc.
   * 
   * @param response
   * @return
   */
  protected RestMethodResult<T> buildResult(Response response) {

    int status = response.status;
    String statusMsg = "";
    String responseBody = null;
    T resource = null;

    try {
      responseBody = new String(response.body, getCharacterEncoding(response.headers));
            if(status==200 && request.getMethod()!= RestMethodFactory.Method.DELETE)
          resource = parseResponseBody(responseBody);

    } catch (Exception ex) {
      // TODO Should we set some custom status code?
      status += 500; // spec only defines up to 505
      statusMsg = ex.getMessage();
            ex.printStackTrace();
        }
    return new RestMethodResult<T>(status, statusMsg, resource);
  }

  protected abstract Request buildRequest();
  
  protected boolean requiresAuthorization() {
    return true;
  }

  protected abstract T parseResponseBody(String responseBody) throws Exception;

  private Response doRequest(Request request) {

    RestClient client = new RestClient();
    return client.execute(request);
  }

  private String getCharacterEncoding(Map<String, List<String>> headers) {
    // TODO get value from headers
    return DEFAULT_ENCODING;
  }

}

Java Source Code List

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