commit 25be53652167300183282d170a00a6df576523f5
author Martijn Coenen <martijn.coenen@nxp.com> Mon Jan 10 16:12:52 2011 +0100
committer Nick Pelly <npelly@google.com> Mon Jan 10 12:11:33 2011 -0800
tree 245199d6b2fc8539218ebcf80f05a46e10090df9
parent 13d1cb56dfdfc89888de6a0389b0fe6cf7e36c27

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

diff --git a/core/java/android/nfc/technology/Ndef.java b/core/java/android/nfc/technology/Ndef.java
index 457920f..5f05b58 100644
--- a/core/java/android/nfc/technology/Ndef.java
+++ b/core/java/android/nfc/technology/Ndef.java
@@ -224,7 +224,22 @@
     }
 
     /**
-     * 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 @@
         }
     }
 
-    /**
-     * 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();