From c933fb663e4748c4fa3f92fc63649e5199519a86 Mon Sep 17 00:00:00 2001
From: Fred Quintana <fredq@google.com>
Date: Thu, 11 Jun 2009 12:14:40 -0700
Subject: [PATCH] add a data_version column to the data table

---
 core/java/android/content/ContentProviderOperation.java | 6 ++++++
 core/java/android/provider/ContactsContract.java        | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/core/java/android/content/ContentProviderOperation.java b/core/java/android/content/ContentProviderOperation.java
index 001af16ea2931..8b0b6ab0a9795 100644
--- a/core/java/android/content/ContentProviderOperation.java
+++ b/core/java/android/content/ContentProviderOperation.java
@@ -369,6 +369,12 @@ public class ContentProviderOperation implements Parcelable {
 
         /** Create a ContentProviderOperation from this {@link Builder}. */
         public ContentProviderOperation build() {
+            if (mType == TYPE_UPDATE) {
+                if ((mValues == null || mValues.size() == 0)
+                        && (mValuesBackReferences == null || mValuesBackReferences.size() == 0)) {
+                    throw new IllegalArgumentException("Empty values");
+                }
+            }
             return new ContentProviderOperation(this);
         }
 
diff --git a/core/java/android/provider/ContactsContract.java b/core/java/android/provider/ContactsContract.java
index cbc76c178dd25..d7e7d8d3c3613 100644
--- a/core/java/android/provider/ContactsContract.java
+++ b/core/java/android/provider/ContactsContract.java
@@ -341,6 +341,14 @@ public final class ContactsContract {
          */
         public static final String IS_RESTRICTED = "is_restricted";
 
+        /**
+         * The version of this data record. This is a read-only value. The data column is
+         * guaranteed to not change without the version going up. This value is monotonically
+         * increasing.
+         * <P>Type: INTEGER</P>
+         */
+        public static final String DATA_VERSION = "data_version";
+
         /** Generic data column, the meaning is {@link #MIMETYPE} specific */
         public static final String DATA1 = "data1";
         /** Generic data column, the meaning is {@link #MIMETYPE} specific */