Pull cacheinvalidations code directory into chromium repo.

third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/android2/AndroidTiclManifest.java

Index: third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/android2/AndroidTiclManifest.java
diff --git a/third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/android2/AndroidTiclManifest.java b/third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/android2/AndroidTiclManifest.java
new file mode 100644
index 0000000000000000000000000000000000000000..1f4ab073c181f7c507d888e32d31b39a716097dd
--- /dev/null
+++ b/third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/android2/AndroidTiclManifest.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.ipc.invalidation.ticl.android2;
+
+import com.google.ipc.invalidation.util.Preconditions;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+
+import java.util.HashMap;
+import java.util.Map;
+
+
+/**
+ * Interface to the {@code AndroidManifest.xml} that provides access to the configuration data
+ * required by the Android Ticl.
+ *
+ */
+public class AndroidTiclManifest {
+
+  /**
+   * Cache of {@link ApplicationMetadata} to avoid repeatedly scanning manifest. The key is the
+   * package name for the context.
+   */
+  private static final Map<String, ApplicationMetadata> applicationMetadataCache =
+      new HashMap<String, ApplicationMetadata>();
+
+  /** Application metadata from the Android manifest. */
+  private final ApplicationMetadata metadata;
+
+  public AndroidTiclManifest(Context context) {
+    metadata = createApplicationMetadata(Preconditions.checkNotNull(context));
+  }
+
+  /** Returns the name of the class implementing the Ticl service. */
+  public String getTiclServiceClass() {
+    return metadata.ticlServiceClass;
+  }
+
+  /** Returns the name of the class on which listener events will be invoked. */
+  String getListenerClass() {
+    return metadata.listenerClass;
+  }
+
+  /** Returns the name of the class implementing the invalidation listener intent service. */
+  public String getListenerServiceClass() {
+    return metadata.listenerServiceClass;
+  }
+
+  /**
+   * Returns the name of the class implementing the background invalidation listener intent service.
+   */
+  String getBackgroundInvalidationListenerServiceClass() {
+    return metadata.backgroundInvalidationListenerServiceClass;
+  }
+
+  /**
+   * If it has not already been cached for the given {@code context}, creates and caches application
+   * metadata from the manifest.
+   */
+  private static ApplicationMetadata createApplicationMetadata(Context context) {
+    synchronized (applicationMetadataCache) {
+      String packageName = context.getPackageName();
+      ApplicationMetadata metadata = applicationMetadataCache.get(packageName);
+      if (metadata == null) {
+        metadata = new ApplicationMetadata(context);
+        applicationMetadataCache.put(packageName, metadata);
+      }
+      return metadata;
+    }
+  }
+
+  /** Application metadata for a specific context. */
+  private static final class ApplicationMetadata {
+    /**
+     * Name of the {@code <application>} metadata element whose value gives the Java class that
+     * implements the application {@code InvalidationListener}. Must be set if
+     * {@link #LISTENER_SERVICE_NAME_KEY} is not set.
+     */
+    private static final String LISTENER_NAME_KEY = "ipc.invalidation.ticl.listener_class";
+
+    /**
+     * Name of the {@code <application>} metadata element whose value gives the Java class that
+     * implements the Ticl service. Should only be set in tests.
+     */
+    private static final String TICL_SERVICE_NAME_KEY = "ipc.invalidation.ticl.service_class";
+
+    /**
+     * Name of the {@code <application>} metadata element whose value gives the Java class that
+     * implements the application's invalidation listener intent service.
+     */
+    private static final String LISTENER_SERVICE_NAME_KEY =
+        "ipc.invalidation.ticl.listener_service_class";
+
+    /**
+     * Name of the {@code <application>} metadata element whose value gives the Java class that
+     * implements the application's background invalidation listener intent service.
+     */
+    private static final String BACKGROUND_INVALIDATION_LISTENER_SERVICE_NAME_KEY =
+        "ipc.invalidation.ticl.background_invalidation_listener_service_class";
+
+    /** Default values returned if not overriden by the manifest file. */
+    private static final Map<String, String> DEFAULTS = new HashMap<String, String>();
+    static {
+        DEFAULTS.put(TICL_SERVICE_NAME_KEY,
+            "com.google.ipc.invalidation.ticl.android2.TiclService");
+        DEFAULTS.put(LISTENER_NAME_KEY, "");
+        DEFAULTS.put(LISTENER_SERVICE_NAME_KEY,
+            "com.google.ipc.invalidation.ticl.android2.AndroidInvalidationListenerStub");
+        DEFAULTS.put(BACKGROUND_INVALIDATION_LISTENER_SERVICE_NAME_KEY, null);
+    }
+
+    private final String ticlServiceClass;
+    private final String listenerClass;
+    private final String listenerServiceClass;
+    private final String backgroundInvalidationListenerServiceClass;
+
+    ApplicationMetadata(Context context) {
+      ApplicationInfo appInfo;
+      try {
+        // Read metadata from manifest.xml
+        appInfo = context.getPackageManager()
+            .getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);
+      } catch (NameNotFoundException exception) {
+        throw new RuntimeException("Cannot read own application info", exception);
+      }
+      ticlServiceClass = readApplicationMetadata(appInfo, TICL_SERVICE_NAME_KEY);
+      listenerClass = readApplicationMetadata(appInfo, LISTENER_NAME_KEY);
+      listenerServiceClass = readApplicationMetadata(appInfo, LISTENER_SERVICE_NAME_KEY);
+      backgroundInvalidationListenerServiceClass =
+          readApplicationMetadata(appInfo, BACKGROUND_INVALIDATION_LISTENER_SERVICE_NAME_KEY);
+    }
+
+    /**
+     * Returns the metadata-provided value for {@code key} in {@code appInfo} if one
+     * exists, or the value from {@link #DEFAULTS} if one does not.
+     */
+    private static String readApplicationMetadata(ApplicationInfo appInfo, String key) {
+      String value = null;
+      if (appInfo.metaData != null) {
+        value = appInfo.metaData.getString(key);
+      }
+      // Return the manifest value if present or the default value if not.
+      return (value != null) ? value : DEFAULTS.get(key);
+    }
+  }
+}