1 files changed, 91 insertions, 0 deletions
diff --git a/src/com/android/providers/contacts/VoicemailPermissions.java b/src/com/android/providers/contacts/VoicemailPermissions.java
new file mode 100644
index 0000000..34dbced
--- /dev/null
+++ b/src/com/android/providers/contacts/VoicemailPermissions.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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.android.providers.contacts;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+
+/**
+ * Provides method related to check various voicemail permissions under the
+ * specified context.
+ * <p> This is an immutable object.
+ */
+public class VoicemailPermissions {
+    private final Context mContext;
+
+    public VoicemailPermissions(Context context) {
+        mContext = context;
+    }
+
+    /** Determines if the calling process has access to its own voicemails. */
+    public boolean callerHasOwnVoicemailAccess() {
+        return callerHasPermission(Manifest.permission.READ_WRITE_OWN_VOICEMAIL);
+    }
+
+    /** Determines if the calling process has access to all voicemails. */
+    public boolean callerHasFullAccess() {
+        return callerHasPermission(Manifest.permission.READ_WRITE_OWN_VOICEMAIL) &&
+                callerHasPermission(Manifest.permission.READ_WRITE_ALL_VOICEMAIL);
+    }
+
+    /**
+     * Checks that the caller has permissions to access its own voicemails.
+     *
+     * @throws SecurityException if the caller does not have the voicemail source permission.
+     */
+    public void checkCallerHasOwnVoicemailAccess() {
+        if (!callerHasOwnVoicemailAccess()) {
+            throw new SecurityException("The caller must have permission: " +
+                    Manifest.permission.READ_WRITE_OWN_VOICEMAIL);
+        }
+    }
+
+    /**
+     * Checks that the caller has permissions to access ALL voicemails.
+     *
+     * @throws SecurityException if the caller does not have the voicemail source permission.
+     */
+    public void checkCallerHasFullAccess() {
+        if (!callerHasFullAccess()) {
+            throw new SecurityException(String.format("The caller must have permissions %s AND %s",
+                    Manifest.permission.READ_WRITE_OWN_VOICEMAIL,
+                    Manifest.permission.READ_WRITE_ALL_VOICEMAIL));
+        }
+    }
+
+    /** Determines if the given package has access to its own voicemails. */
+    public boolean packageHasOwnVoicemailAccess(String packageName) {
+        return packageHasPermission(packageName, Manifest.permission.READ_WRITE_OWN_VOICEMAIL);
+    }
+
+    /** Determines if the given package has full access. */
+    public boolean packageHasFullAccess(String packageName) {
+        return packageHasPermission(packageName, Manifest.permission.READ_WRITE_OWN_VOICEMAIL) &&
+                packageHasPermission(packageName, Manifest.permission.READ_WRITE_ALL_VOICEMAIL);
+    }
+
+    /** Determines if the given package has the given permission. */
+    private boolean packageHasPermission(String packageName, String permission) {
+        return mContext.getPackageManager().checkPermission(permission, packageName)
+                == PackageManager.PERMISSION_GRANTED;
+    }
+
+    /** Determines if the calling process has the given permission. */
+    private boolean callerHasPermission(String permission) {
+        return mContext.checkCallingPermission(permission) == PackageManager.PERMISSION_GRANTED;
+    }
+}