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/*
* Copyright 2013 Jesse Morgan
*/
package com.p4square.grow.frontend;
import java.io.IOException;
import com.fasterxml.jackson.databind.JavaType;
import org.restlet.Request;
import org.restlet.Response;
import org.restlet.Restlet;
import org.restlet.data.Method;
import org.restlet.data.Status;
import org.restlet.representation.Representation;
import org.restlet.representation.StringRepresentation;
import com.p4square.grow.provider.Provider;
import com.p4square.grow.provider.JsonEncodedProvider;
/**
* Fetch a JSON object via a Request.
*
* @author Jesse Morgan <jesse@jesterpm.net>
*/
public class JsonRequestProvider<V> extends JsonEncodedProvider<V> implements Provider<String, V> {
private final Restlet mDispatcher;
public JsonRequestProvider(Restlet dispatcher, Class<V> clazz) {
super(clazz);
mDispatcher = dispatcher;
}
public JsonRequestProvider(Restlet dispatcher, JavaType type) {
super(type);
mDispatcher = dispatcher;
}
@Override
public V get(String url) throws IOException {
Request request = new Request(Method.GET, url);
Response response = mDispatcher.handle(request);
Representation representation = response.getEntity();
if (!response.getStatus().isSuccess()) {
if (representation != null) {
representation.release();
}
if (Status.CLIENT_ERROR_NOT_FOUND.equals(response.getStatus())) {
throw new NotFoundException("Could not get object. " + response.getStatus());
} else {
throw new IOException("Could not get object. " + response.getStatus());
}
}
return decode(representation.getText());
}
@Override
public void put(String url, V obj) throws IOException {
final Request request = new Request(Method.PUT, url);
request.setEntity(new StringRepresentation(encode(obj)));
final Response response = mDispatcher.handle(request);
if (!response.getStatus().isSuccess()) {
throw new IOException("Could not put object. " + response.getStatus());
}
}
/**
* Variant of put() which makes a POST request to the url.
*
* This method may eventually be incorporated into Provider for
* creating new objects with auto-generated IDs.
*
* @param url The url to make the request to.
* @param obj The post to post.
* @throws IOException on failure.
*/
public void post(String url, V obj) throws IOException {
final Request request = new Request(Method.POST, url);
request.setEntity(new StringRepresentation(encode(obj)));
final Response response = mDispatcher.handle(request);
if (!response.getStatus().isSuccess()) {
throw new IOException("Could not put object. " + response.getStatus());
}
}
}
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