Android Open Source - BackbeamAndroid Query

From Project

License

The source code is released under:
Copyright (c) 2012 Level Apps S.L. <http://backbeam.io> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software...
If you think the Android project BackbeamAndroid listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package io.backbeam;
//from  w w  w.  ja  v a  2  s .  c  o m
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public class Query {
  
  private String entity;
  private String query;
  private Object[] params;
  private FetchPolicy fetchPolicy;
  
  public Query(String entity) {
    this.entity = entity;
    this.fetchPolicy = FetchPolicy.REMOTE_ONLY;
  }
  
  public Query setQuery(String query, Object... params) {
    this.query = query;
    this.params = params;
    return this;
  }
  
  public void fetch(int limit, int offset, final FetchCallback callback) {
    TreeMap<String, Object> prms = new TreeMap<String, Object>();
    if (query != null) {
      prms.put("q", query);
      if (params != null) {
        prms.put("params", Utils.stringsFromParams(params));
      }
    }
    prms.put("limit", Integer.toString(limit));
    prms.put("offset", Integer.toString(offset));
    Backbeam.instance().perform("GET", "/data/"+entity, prms, fetchPolicy, new RequestCallback() {
      @Override
      public void success(Json response, boolean fromCache) {
            Json values = response.get("objects");
            Json ids    = response.get("ids");
            
            Map<String, BackbeamObject> objects = BackbeamObject.objectsFromValues(values, null);
            List<BackbeamObject> list = new ArrayList<BackbeamObject>(ids.size());
            for (Json id : ids) {
              BackbeamObject obj = objects.get(id.asString());
              list.add(obj);
            }
            callback.success(list, response.get("count").asInt(), fromCache);
      }
      
      @Override
      public void failure(BackbeamException exception) {
        callback.failure(exception);
      }
    });
  }
  
  public void near(String field, double lat, double lon, int limit, final NearFetchCallback callback) {
    TreeMap<String, Object> prms = new TreeMap<String, Object>();
    if (query != null) {
      prms.put("q", query);
      if (params != null) {
        prms.put("params", Utils.stringsFromParams(params));
      }
    }
    prms.put("lat", Double.toString(lat));
    prms.put("lon", Double.toString(lon));
    prms.put("limit", Integer.toString(limit));
    Backbeam.instance().perform("GET", "/data/"+entity+"/near/"+field, prms, fetchPolicy, new RequestCallback() {
      @Override
      public void success(Json response, boolean fromCache) {
            Json values    = response.get("objects");
            Json ids       = response.get("ids");
            Json distances = response.get("distances");
            
            Map<String, BackbeamObject> objects = BackbeamObject.objectsFromValues(values, null);
            List<BackbeamObject> list = new ArrayList<BackbeamObject>(ids.size());
            for (Json id : ids) {
              BackbeamObject obj = objects.get(id.asString());
              list.add(obj);
            }
            List<Integer> dists = new ArrayList<Integer>();
            for (Json json : distances) {
          dists.add(json.asInt());
        }
            callback.success(list, response.get("count").asInt(), dists, fromCache);
      }
      
      @Override
      public void failure(BackbeamException exception) {
        callback.failure(exception);
      }
    });
  }
  
  public void bounding(String field, double swlat, double swlon, double nelat, double nelon, int limit, final FetchCallback callback) {
    TreeMap<String, Object> prms = new TreeMap<String, Object>();
    if (query != null) {
      prms.put("q", query);
      if (params != null) {
        prms.put("params", Utils.stringsFromParams(params));
      }
    }
    prms.put("swlat", Double.toString(swlat));
    prms.put("swlon", Double.toString(swlon));
    prms.put("nelat", Double.toString(nelat));
    prms.put("nelon", Double.toString(nelon));
    prms.put("limit", Integer.toString(limit));
    Backbeam.instance().perform("GET", "/data/"+entity+"/bounding/"+field, prms, fetchPolicy, new RequestCallback() {
      @Override
      public void success(Json response, boolean fromCache) {
            Json values = response.get("objects");
            Json ids    = response.get("ids");
            
            Map<String, BackbeamObject> objects = BackbeamObject.objectsFromValues(values, null);
            List<BackbeamObject> list = new ArrayList<BackbeamObject>(ids.size());
            for (Json id : ids) {
              BackbeamObject obj = objects.get(id.asString());
              list.add(obj);
            }
            callback.success(list, response.get("count").asInt(), fromCache);
      }
      
      @Override
      public void failure(BackbeamException exception) {
        callback.failure(exception);
      }
    });
  }

  public FetchPolicy getFetchPolicy() {
    return fetchPolicy;
  }

  public void setFetchPolicy(FetchPolicy fetchPolicy) {
    this.fetchPolicy = fetchPolicy;
  }
  
  private void remove(TreeMap<String, Object> prms, final RemoveCallback callback) {
    Backbeam.instance().perform("DELETE", "/data/"+entity, prms, fetchPolicy, new RequestCallback() {
      @Override
      public void success(Json response, boolean fromCache) {
            Json removed = response.get("removed");
            
            callback.success(removed.asInt());
      }
      
      @Override
      public void failure(BackbeamException exception) {
        callback.failure(exception);
      }
    });
  }
  
  public void remove(int limit, int offset, final RemoveCallback callback) {
    TreeMap<String, Object> prms = new TreeMap<String, Object>();
    if (query != null) {
      prms.put("q", query);
      if (params != null) {
        prms.put("params", Utils.stringsFromParams(params));
      }
    }
    prms.put("limit", Integer.toString(limit));
    prms.put("offset", Integer.toString(offset));
    remove(prms, callback);
  }
  
  public void removeAll(final RemoveCallback callback) {
    TreeMap<String, Object> prms = new TreeMap<String, Object>();
    if (query != null) {
      prms.put("q", query);
      if (params != null) {
        prms.put("params", Utils.stringsFromParams(params));
      }
    }
    prms.put("limit", "all");
    remove(prms, callback);
  }

}
Java Source Code List
