io.prediction.ItemRecGetTopNRequestBuilder Maven / Gradle / Ivy
package io.prediction;
import com.ning.http.client.Request;
import com.ning.http.client.RequestBuilder;
/**
* Get top n recommendations request builder for item recommendation engine
*
* @author The PredictionIO Team (http://prediction.io)
* @version 0.4
* @since 0.4
*/
public class ItemRecGetTopNRequestBuilder {
private String apiUrl;
private String apiFormat;
private String appkey;
private String engine;
private String uid;
private int n;
private String[] itypes;
private Double latitude;
private Double longitude;
private Double within;
private String unit;
/**
* Instantiate a request builder with mandatory arguments.
*
* Do not use this directly. Please refer to "See Also".
*
* @param apiUrl the API URL
* @param apiFormat the return format of the API
* @param appkey the new app key to be used
* @param engine engine name
* @param uid UID
* @param n number of recommendations to return
*
* @see Client#getItemRecGetTopNRequestBuilder
*/
public ItemRecGetTopNRequestBuilder(String apiUrl, String apiFormat, String appkey, String engine, String uid, int n) {
this.apiUrl = apiUrl;
this.apiFormat = apiFormat;
this.appkey = appkey;
this.engine = engine;
this.uid = uid;
this.n = n;
}
/**
* Add the "itypes" optional argument to the request.
*
* @param itypes array of item types
*/
public ItemRecGetTopNRequestBuilder itypes(String[] itypes) {
this.itypes = itypes;
return this;
}
/**
* Add the "latitude" optional argument to the request.
*
* Only certain data backend support geospatial indexing.
* Please refer to the main documentation for more information.
*
* @param latitude latitude
*/
public ItemRecGetTopNRequestBuilder latitude(Double latitude) {
this.latitude = latitude;
return this;
}
/**
* Add the "longitude" optional argument to the request.
*
* Only certain data backend support geospatial indexing.
* Please refer to the main documentation for more information.
*
* @param longitude longitude
*/
public ItemRecGetTopNRequestBuilder longitude(Double longitude) {
this.longitude = longitude;
return this;
}
/**
* Add the "within" optional argument to the request.
*
* Only certain data backend support geospatial indexing.
* Please refer to the main documentation for more information.
*
* @param within radius of search from the specified location
*/
public ItemRecGetTopNRequestBuilder within(Double within) {
this.within = within;
return this;
}
/**
* Add the "unit" optional argument to the request.
*
* Only certain data backend support geospatial indexing.
* Please refer to the main documentation for more information.
*
* @param unit unit of "within" (radius)
*/
public ItemRecGetTopNRequestBuilder unit(String unit) {
this.unit = unit;
return this;
}
/**
* Build a request.
*
* Do not use this directly. Please refer to "See Also".
*
* @see Client#getItemRecTopN(ItemRecGetTopNRequestBuilder)
* @see Client#getItemRecTopNAsFuture(ItemRecGetTopNRequestBuilder)
*/
public Request build() {
RequestBuilder builder = new RequestBuilder("GET");
builder.setUrl(this.apiUrl + "/engines/itemrec/" + this.engine + "/topn." + this.apiFormat);
builder.addQueryParameter("appkey", this.appkey);
builder.addQueryParameter("uid", this.uid);
builder.addQueryParameter("n", Integer.toString(this.n));
if (this.itypes != null && this.itypes.length > 0) {
builder.addQueryParameter("itypes", Utils.itypesAsString(this.itypes));
}
if (this.latitude != null && this.longitude != null) {
builder.addQueryParameter("latlng", this.latitude.toString() + "," + this.longitude.toString());
}
if (this.within != null) {
builder.addQueryParameter("within", this.within.toString());
}
if (this.unit != null) {
builder.addQueryParameter("unit", this.unit.toString());
}
return builder.build();
}
}