Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/policy/PolicyManager.java

+// Copyright 2015 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.policy;
+
+import android.os.Bundle;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.ThreadUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Reads enterprise policies from one or more policy providers
+ * and plumbs them through to the policy subsystem.
+ */
+public class PolicyManager {
+    private long mNativePolicyManager;
+
+    private final List<PolicyProvider> mPolicyProviders = new ArrayList<>();
+    private final List<Bundle> mCachedPolicies = new ArrayList<>();
+    private final List<PolicyChangeListener> mPolicyChangeListeners = new ArrayList<>();
+
+    public PolicyManager() {
+        ThreadUtils.assertOnUiThread();
+        mNativePolicyManager = nativeInit();
+    }
+
+    /**
+     * PolicyProviders are assigned a unique precedence based on their order of registration.
+     * Later Registration -> Higher Precedence.
+     * This precedence is also used as a 'source' tag for disambiguating updates.
+     */
+    public void registerProvider(PolicyProvider provider) {
+        mPolicyProviders.add(provider);
+        mCachedPolicies.add(null);
+        provider.setManagerAndSource(this, mPolicyProviders.size() - 1);
+        provider.refresh();
+    }
+
+    public void destroy() {
+        // All the activities registered should have been destroyed by then.
+        assert mPolicyChangeListeners.isEmpty();
+
+        for (PolicyProvider provider : mPolicyProviders) {
+            provider.destroy();
+        }
+        mPolicyProviders.clear();
+
+        nativeDestroy(mNativePolicyManager);
+        mNativePolicyManager = 0;
+    }
+
+    void onSettingsAvailable(int source, Bundle newSettings) {
+        mCachedPolicies.set(source, newSettings);
+        // Check if we have policies from all the providers before applying them.
+        for (Bundle settings : mCachedPolicies) {
+            if (settings == null) return;
+        }
+        for (Bundle settings : mCachedPolicies) {
+            for (String key : settings.keySet()) {
+                Object value = settings.get(key);
+                if (value instanceof Boolean) {
+                    nativeSetPolicyBoolean(mNativePolicyManager, key, (Boolean) value);
+                    continue;
+                }
+                if (value instanceof String) {
+                    nativeSetPolicyString(mNativePolicyManager, key, (String) value);
+                    continue;
+                }
+                if (value instanceof Integer) {
+                    nativeSetPolicyInteger(mNativePolicyManager, key, (Integer) value);
+                    continue;
+                }
+                if (value instanceof String[]) {
+                    nativeSetPolicyStringArray(mNativePolicyManager, key, (String[]) value);
+                    continue;
+                }
+                assert false : "Invalid setting " + value + " for key " + key;
+            }
+        }
+        nativeFlushPolicies(mNativePolicyManager);
+    }
+
+    void terminateIncognitoSession() {
+        for (PolicyChangeListener listener : mPolicyChangeListeners) {
+            listener.terminateIncognitoSession();
+        }
+    }
+
+    public void addPolicyChangeListener(PolicyChangeListener listener) {
+        mPolicyChangeListeners.add(listener);
+    }
+
+    public void removePolicyChangeListener(PolicyChangeListener listener) {
+        mPolicyChangeListeners.remove(listener);
+    }
+
+    @CalledByNative
+    private void refreshPolicies() {
+        assert mPolicyProviders.size() == mCachedPolicies.size();
+        for (int i = 0; i < mCachedPolicies.size(); ++i) {
+            mCachedPolicies.set(i, null);
+        }
+        for (PolicyProvider provider : mPolicyProviders) {
+            provider.refresh();
+        }
+    }
+
+    /**
+     * Interface to handle actions related with policy changes.
+     */
+    public interface PolicyChangeListener {
+        /**
+         * Call to notify the listener that incognito browsing is unavailable due to policy.
+         */
+        void terminateIncognitoSession();
+    }
+
+    private native long nativeInit();
+    private native void nativeDestroy(long nativePolicyManager);
+
+    private native void nativeSetPolicyBoolean(
+            long nativePolicyManager, String policyKey, boolean value);
+    private native void nativeSetPolicyInteger(
+            long nativePolicyManager, String policyKey, int value);
+    private native void nativeSetPolicyString(
+            long nativePolicyManager, String policyKey, String value);
+    private native void nativeSetPolicyStringArray(
+            long nativePolicyManager, String policyKey, String[] value);
+    private native void nativeFlushPolicies(long nativePolicyManager);
+}