Java implementation of PaymentRequest mojo service

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/AutofillPaymentApp.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/AutofillPaymentApp.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/AutofillPaymentApp.java
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/AutofillPaymentApp.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 android.os.Handler;
+
+import org.chromium.chrome.browser.autofill.PersonalDataManager;
+import org.chromium.chrome.browser.autofill.PersonalDataManager.CreditCard;
+import org.chromium.content_public.browser.WebContents;
+import org.chromium.mojom.payments.PaymentItem;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Provides access to locally stored user credit cards.
+ */
+public class AutofillPaymentApp implements PaymentApp {
+    private final WebContents mWebContents;
+
+    /**
+     * Builds a payment app backed by autofill cards.
+     *
+     * @param webContents The web contents where PaymentRequest was invoked.
+     */
+    public AutofillPaymentApp(WebContents webContents) {
+        mWebContents = webContents;
+    }
+
+    @Override
+    public void getInstruments(List<PaymentItem> unusedItems, final InstrumentsCallback callback) {
+        List<CreditCard> cards = PersonalDataManager.getInstance().getCreditCards();
+        final List<PaymentInstrument> instruments = new ArrayList<>(cards.size());
+        for (int i = 0; i < cards.size(); i++) {
+            instruments.add(new AutofillPaymentInstrument(mWebContents, cards.get(i)));
+        }
+        new Handler().post(new Runnable() {
+            @Override
+            public void run() {
+                callback.onInstrumentsReady(AutofillPaymentApp.this, instruments);
+            }
+        });
+    }
+
+    @Override
+    public Set<String> getSupportedMethodNames() {
+        // https://w3c.github.io/browser-payment-api/specs/basic-card-payment.html#method-id
+        // The spec also includes more detailed card types, e.g., "visa/credit" and "visa/debit".
+        // Autofill does not distinguish between these types of cards, so they are not in the list
+        // of supported method names.
+        Set<String> methods = new HashSet<String>();
+
+        methods.add("visa");
+        methods.add("mastercard");
+        methods.add("amex");
+        methods.add("discover");
+        methods.add("diners");
+        methods.add("jcb");
+        methods.add("unionpay");
+
+        // The spec does not include "generic" card types. That's the type of card for which
+        // Chrome cannot determine the type.
+        methods.add("generic");
+
+        return methods;
+    }
+
+    @Override
+    public String getIdentifier() {
+        return "Chrome_Autofill_Payment_App";
+    }
+}