Java implementation of PaymentRequest mojo service

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.payments;
+
+import org.chromium.chrome.browser.payments.ui.PaymentOption;
+import org.chromium.mojom.payments.PaymentItem;
+
+import org.json.JSONObject;
+
+import java.util.List;
+
+/**
+ * The base class for a single payment instrument, e.g., a credit card.
+ */
+public abstract class PaymentInstrument extends PaymentOption {
+    /**
+     * The interface for the requester of instrument details.
+     */
+    public interface DetailsCallback {
+        /**
+         * Called after retrieving instrument details.
+         *
+         * @param methodName Method name. For example, "visa".
+         * @param stringifiedDetails JSON-serialized object. For example, {"card": "123"}.
+         */
+        void onInstrumentDetailsReady(String methodName, String stringifiedDetails);
+
+        /**
+         * Called if unable to retrieve instrument details.
+         */
+        void onInstrumentDetailsError();
+    }
+
+    protected PaymentInstrument(String id, String label, String sublabel, int icon) {
+        super(id, label, sublabel, icon);
+    }
+
+    /**
+     * Returns the method name for this instrument, e.g., "visa" or "mastercard" in basic card
+     * payments: https://w3c.github.io/browser-payment-api/specs/basic-card-payment.html#method-id
+     *
+     * @return The method name for this instrument.
+     */
+    public abstract String getMethodName();
+
+    /**
+     * Asynchronously retrieves the instrument details and invokes the callback with the result.
+     *
+     * @param merchantName The name of the merchant.
+     * @param origin The origin of this merchant.
+     * @param items The line items, the last of which is the total.
+     * @param details The payment-method specific data.
+     * @param callback The object that will receive the instrument details.
+     */
+    public abstract void getDetails(String merchantName, String origin, List<PaymentItem> items,
+            JSONObject details, DetailsCallback callback);
+
+    /**
+     * Cleans up any resources held by the payment instrument. For example, closes server
+     * connections.
+     */
+    public abstract void dismiss();
+}