From 25be53652167300183282d170a00a6df576523f5 Mon Sep 17 00:00:00 2001
From: Martijn Coenen <martijn.coenen@nxp.com>
Date: Mon, 10 Jan 2011 16:12:52 +0100
Subject: [PATCH] Implement canMakeReadonly().

The method is needed since makeReadOnly() only works on T1T/T2T. Also removed
makeLowlevelReadonly(), since NFC forum does not allow setting the CC and the lock
bits separately.

Change-Id: I8e6d7c065b1f017ef07d878c41df05e1a8193f5a
---
 core/java/android/nfc/technology/Ndef.java | 28 ++++++++++++----------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/core/java/android/nfc/technology/Ndef.java b/core/java/android/nfc/technology/Ndef.java
index 457920f8e53d7..5f05b58d506d1 100644
--- a/core/java/android/nfc/technology/Ndef.java
+++ b/core/java/android/nfc/technology/Ndef.java
@@ -224,7 +224,22 @@ public final class Ndef extends BasicTagTechnology {
     }
 
     /**
-     * Set the CC field to indicate this tag is read-only
+     * Indicates whether a tag can be made read-only with
+     * {@link #makeReadonly()}
+     */
+    public boolean canMakeReadonly() {
+        if (mNdefType == NFC_FORUM_TYPE_1 || mNdefType == NFC_FORUM_TYPE_2) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Sets the CC field to indicate this tag is read-only
+     * and permanently sets the lock bits to prevent any further NDEF
+     * modifications.
+     * This is a one-way process and can not be reverted!
      * @throws IOException
      */
     public boolean makeReadonly() throws IOException {
@@ -249,17 +264,6 @@ public final class Ndef extends BasicTagTechnology {
         }
     }
 
-    /**
-     * Attempt to use tag specific technology to really make
-     * the tag read-only
-     * For NFC Forum Type 1 and 2 only.
-     */
-    public void makeLowLevelReadonly() {
-        checkConnected();
-
-        throw new UnsupportedOperationException();
-    }
-
     @Override
     public byte[] transceive(byte[] data) {
         checkConnected();