1 files changed, 96 insertions, 0 deletions
diff --git a/src/main/java/com/p4square/grow/frontend/JsonRequestProvider.java b/src/main/java/com/p4square/grow/frontend/JsonRequestProvider.java
new file mode 100644
index 0000000..bf3b2b3
--- /dev/null
+++ b/src/main/java/com/p4square/grow/frontend/JsonRequestProvider.java
@@ -0,0 +1,96 @@
+/*
+ * 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());
+        }
+    }
+}