[Payments] Cache payment manifests.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentManifestWebDataService.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentManifestWebDataService.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentManifestWebDataService.java
new file mode 100644
index 0000000000000000000000000000000000000000..3c632e406997fbfc1ae06c3be6944598a78cad93
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentManifestWebDataService.java
@@ -0,0 +1,140 @@
+// Copyright 2017 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.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.payments.mojom.WebAppManifestSection;
+
+/** Java wrapper of the payment manifest web data service. */
+@JNINamespace("payments")
+public class PaymentManifestWebDataService {
+    /** Interface for the callback to invoke when getting data from the web data service. */
+    public interface PaymentManifestWebDataServiceCallback {
+        /**
+         * Called when getPaymentMethodManifest success.
+         *
+         * @param appPackageNames The supported apps' package names in the payment method manifest.
+         */
+        @CalledByNative("PaymentManifestWebDataServiceCallback")
+        void onPaymentMethodManifestFetched(String[] appPackageNames);
+
+        /**
+         * Called when getPaymentWebAppManifest success.
+         *
+         * @param manifest The web app manifest sections.
+         */
+        @CalledByNative("PaymentManifestWebDataServiceCallback")
+        void onPaymentWebAppManifestFetched(WebAppManifestSection[] manifest);
+    }
+
+    /** Holds the native counterpart of this class object. */
+    private long mManifestWebDataServiceAndroid;
+
+    public PaymentManifestWebDataService() {
+        mManifestWebDataServiceAndroid = nativeInit();
+    }
+
+    /**
+     * Destroy this class object. It destroys the native counterpart.
+     */
+    public void destroy() {
+        nativeDestroy(mManifestWebDataServiceAndroid);
+        mManifestWebDataServiceAndroid = 0;
+    }
+
+    /**
+     * Gets the payment method's manifest.
+     *
+     * @param methodName The payment method name.
+     * @param callback   The callback to invoke when finishing the request.
+     * @return True if the result will be returned through callback.
+     */
+    public boolean getPaymentMethodManifest(
+            String methodName, PaymentManifestWebDataServiceCallback callback) {
+        return nativeGetPaymentMethodManifest(mManifestWebDataServiceAndroid, methodName, callback);
+    }
+
+    /**
+     * Gets the corresponding payment web app's manifest.
+     *
+     * @param appPackageName The package name of the Android payment app.
+     * @param callback       The callback to invoke when finishing the request.
+     * @return True if the result will be returned through callback.
+     */
+    public boolean getPaymentWebAppManifest(
+            String appPackageName, PaymentManifestWebDataServiceCallback callback) {
+        return nativeGetPaymentWebAppManifest(
+                mManifestWebDataServiceAndroid, appPackageName, callback);
+    }
+
+    /**
+     * Adds the supported Android apps' package names of the method.
+     *
+     * @param methodName       The method name.
+     * @param appPackageNames  The supported apps' package names.
+     */
+    public void addPaymentMethodManifest(String methodName, String[] appPackageNames) {
+        nativeAddPaymentMethodManifest(mManifestWebDataServiceAndroid, methodName, appPackageNames);
+    }
+
+    /**
+     * Adds web app's manifest.
+     *
+     * @param manifest The manifest.
+     */
+    public void addPaymentWebAppManifest(WebAppManifestSection[] manifest) {
+        nativeAddPaymentWebAppManifest(mManifestWebDataServiceAndroid, manifest);
+    }
+
+    @CalledByNative
+    private static WebAppManifestSection[] createManifest(int numberOfsections) {
+        return new WebAppManifestSection[numberOfsections];
+    }
+
+    @CalledByNative
+    private static void addSectionToManifest(WebAppManifestSection[] manifest, int sectionIndex,
+            String id, long minVersion, int numberOfFingerprints) {
+        manifest[sectionIndex] = new WebAppManifestSection();
+        manifest[sectionIndex].id = id;
+        manifest[sectionIndex].minVersion = minVersion;
+        manifest[sectionIndex].fingerprints = new byte[numberOfFingerprints][];
+    }
+
+    @CalledByNative
+    private static void addFingerprintToSection(WebAppManifestSection[] manifest, int sectionIndex,
+            int fingerprintIndex, byte[] fingerprint) {
+        manifest[sectionIndex].fingerprints[fingerprintIndex] = fingerprint;
+    }
+
+    @CalledByNative
+    private static String getIdFromSection(WebAppManifestSection manifestSection) {
+        return manifestSection.id;
+    }
+
+    @CalledByNative
+    private static long getMinVersionFromSection(WebAppManifestSection manifestSection) {
+        return manifestSection.minVersion;
+    }
+
+    @CalledByNative
+    private static byte[][] getFingerprintsFromSection(WebAppManifestSection manifestSection) {
+        return manifestSection.fingerprints;
+    }
+
+    private native long nativeInit();
+    private native void nativeDestroy(long nativePaymentManifestWebDataServiceAndroid);
+    private native boolean nativeGetPaymentMethodManifest(
+            long nativePaymentManifestWebDataServiceAndroid, String methodName,
+            PaymentManifestWebDataServiceCallback callback);
+    private native boolean nativeGetPaymentWebAppManifest(
+            long nativePaymentManifestWebDataServiceAndroid, String appPackageName,
+            PaymentManifestWebDataServiceCallback callback);
+    private native void nativeAddPaymentMethodManifest(
+            long nativePaymentManifestWebDataServiceAndroid, String methodName,
+            String[] appPackageNames);
+    private native void nativeAddPaymentWebAppManifest(
+            long nativePaymentManifestWebDataServiceAndroid, WebAppManifestSection[] manifest);
+}