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-rw-r--r--core/java/android/content/ContentProviderNative.java63
-rw-r--r--core/java/android/database/BulkCursorToCursorAdaptor.java45
-rw-r--r--core/java/android/database/CursorWindow.java2
-rw-r--r--core/java/android/database/IBulkCursor.java8
-rw-r--r--core/java/android/database/sqlite/SQLiteClosable.java15
5 files changed, 101 insertions, 32 deletions
diff --git a/core/java/android/content/ContentProviderNative.java b/core/java/android/content/ContentProviderNative.java
index de52e65..fdb3d20 100644
--- a/core/java/android/content/ContentProviderNative.java
+++ b/core/java/android/content/ContentProviderNative.java
@@ -73,7 +73,10 @@ abstract public class ContentProviderNative extends Binder implements IContentPr
case QUERY_TRANSACTION:
{
data.enforceInterface(IContentProvider.descriptor);
+
Uri url = Uri.CREATOR.createFromParcel(data);
+
+ // String[] projection
int num = data.readInt();
String[] projection = null;
if (num > 0) {
@@ -82,6 +85,8 @@ abstract public class ContentProviderNative extends Binder implements IContentPr
projection[i] = data.readString();
}
}
+
+ // String selection, String[] selectionArgs...
String selection = data.readString();
num = data.readInt();
String[] selectionArgs = null;
@@ -91,19 +96,33 @@ abstract public class ContentProviderNative extends Binder implements IContentPr
selectionArgs[i] = data.readString();
}
}
+
String sortOrder = data.readString();
IContentObserver observer = IContentObserver.Stub.
asInterface(data.readStrongBinder());
CursorWindow window = CursorWindow.CREATOR.createFromParcel(data);
+ // Flag for whether caller wants the number of
+ // rows in the cursor and the position of the
+ // "_id" column index (or -1 if non-existent)
+ // Only to be returned if binder != null.
+ boolean wantsCursorMetadata = data.readInt() != 0;
+
IBulkCursor bulkCursor = bulkQuery(url, projection, selection,
selectionArgs, sortOrder, observer, window);
reply.writeNoException();
if (bulkCursor != null) {
reply.writeStrongBinder(bulkCursor.asBinder());
+
+ if (wantsCursorMetadata) {
+ reply.writeInt(bulkCursor.count());
+ reply.writeInt(BulkCursorToCursorAdaptor.findRowIdColumnIndex(
+ bulkCursor.getColumnNames()));
+ }
} else {
reply.writeStrongBinder(null);
}
+
return true;
}
@@ -266,9 +285,12 @@ final class ContentProviderProxy implements IContentProvider
return mRemote;
}
- public IBulkCursor bulkQuery(Uri url, String[] projection,
- String selection, String[] selectionArgs, String sortOrder, IContentObserver observer,
- CursorWindow window) throws RemoteException {
+ // Like bulkQuery() but sets up provided 'adaptor' if not null.
+ private IBulkCursor bulkQueryInternal(
+ Uri url, String[] projection,
+ String selection, String[] selectionArgs, String sortOrder,
+ IContentObserver observer, CursorWindow window,
+ BulkCursorToCursorAdaptor adaptor) throws RemoteException {
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
@@ -297,6 +319,12 @@ final class ContentProviderProxy implements IContentProvider
data.writeStrongBinder(observer.asBinder());
window.writeToParcel(data, 0);
+ // Flag for whether or not we want the number of rows in the
+ // cursor and the position of the "_id" column index (or -1 if
+ // non-existent). Only to be returned if binder != null.
+ final boolean wantsCursorMetadata = (adaptor != null);
+ data.writeInt(wantsCursorMetadata ? 1 : 0);
+
mRemote.transact(IContentProvider.QUERY_TRANSACTION, data, reply, 0);
DatabaseUtils.readExceptionFromParcel(reply);
@@ -305,26 +333,43 @@ final class ContentProviderProxy implements IContentProvider
IBinder bulkCursorBinder = reply.readStrongBinder();
if (bulkCursorBinder != null) {
bulkCursor = BulkCursorNative.asInterface(bulkCursorBinder);
+
+ if (wantsCursorMetadata) {
+ int rowCount = reply.readInt();
+ int idColumnPosition = reply.readInt();
+ if (bulkCursor != null) {
+ adaptor.set(bulkCursor, rowCount, idColumnPosition);
+ }
+ }
}
-
+
data.recycle();
reply.recycle();
-
+
return bulkCursor;
}
+ public IBulkCursor bulkQuery(Uri url, String[] projection,
+ String selection, String[] selectionArgs, String sortOrder, IContentObserver observer,
+ CursorWindow window) throws RemoteException {
+ return bulkQueryInternal(
+ url, projection, selection, selectionArgs, sortOrder,
+ observer, window,
+ null /* BulkCursorToCursorAdaptor */);
+ }
+
public Cursor query(Uri url, String[] projection, String selection,
String[] selectionArgs, String sortOrder) throws RemoteException {
//TODO make a pool of windows so we can reuse memory dealers
CursorWindow window = new CursorWindow(false /* window will be used remotely */);
BulkCursorToCursorAdaptor adaptor = new BulkCursorToCursorAdaptor();
- IBulkCursor bulkCursor = bulkQuery(url, projection, selection, selectionArgs, sortOrder,
- adaptor.getObserver(), window);
-
+ IBulkCursor bulkCursor = bulkQueryInternal(
+ url, projection, selection, selectionArgs, sortOrder,
+ adaptor.getObserver(), window,
+ adaptor);
if (bulkCursor == null) {
return null;
}
- adaptor.set(bulkCursor);
return adaptor;
}
diff --git a/core/java/android/database/BulkCursorToCursorAdaptor.java b/core/java/android/database/BulkCursorToCursorAdaptor.java
index cf30dd9..1469ea2 100644
--- a/core/java/android/database/BulkCursorToCursorAdaptor.java
+++ b/core/java/android/database/BulkCursorToCursorAdaptor.java
@@ -43,25 +43,43 @@ public final class BulkCursorToCursorAdaptor extends AbstractWindowedCursor {
try {
mCount = mBulkCursor.count();
mWantsAllOnMoveCalls = mBulkCursor.getWantsAllOnMoveCalls();
-
+
// Search for the rowID column index and set it for our parent
mColumns = mBulkCursor.getColumnNames();
- int length = mColumns.length;
- for (int i = 0; i < length; i++) {
- if (mColumns[i].equals("_id")) {
- mRowIdColumnIndex = i;
- break;
- }
- }
+ mRowIdColumnIndex = findRowIdColumnIndex(mColumns);
} catch (RemoteException ex) {
Log.e(TAG, "Setup failed because the remote process is dead");
}
}
/**
+ * Version of set() that does fewer Binder calls if the caller
+ * already knows BulkCursorToCursorAdaptor's properties.
+ */
+ public void set(IBulkCursor bulkCursor, int count, int idIndex) {
+ mBulkCursor = bulkCursor;
+ mColumns = null; // lazily retrieved
+ mCount = count;
+ mRowIdColumnIndex = idIndex;
+ }
+
+ /**
+ * Returns column index of "_id" column, or -1 if not found.
+ */
+ public static int findRowIdColumnIndex(String[] columnNames) {
+ int length = columnNames.length;
+ for (int i = 0; i < length; i++) {
+ if (columnNames[i].equals("_id")) {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ /**
* Gets a SelfDataChangeOberserver that can be sent to a remote
* process to receive change notifications over IPC.
- *
+ *
* @return A SelfContentObserver hooked up to this Cursor
*/
public synchronized IContentObserver getObserver() {
@@ -190,6 +208,14 @@ public final class BulkCursorToCursorAdaptor extends AbstractWindowedCursor {
@Override
public String[] getColumnNames() {
+ if (mColumns == null) {
+ try {
+ mColumns = mBulkCursor.getColumnNames();
+ } catch (RemoteException ex) {
+ Log.e(TAG, "Unable to fetch column names because the remote process is dead");
+ return null;
+ }
+ }
return mColumns;
}
@@ -255,4 +281,3 @@ public final class BulkCursorToCursorAdaptor extends AbstractWindowedCursor {
}
}
}
-
diff --git a/core/java/android/database/CursorWindow.java b/core/java/android/database/CursorWindow.java
index 99db81b..c756825 100644
--- a/core/java/android/database/CursorWindow.java
+++ b/core/java/android/database/CursorWindow.java
@@ -44,7 +44,7 @@ public class CursorWindow extends SQLiteClosable implements Parcelable {
/**
* Returns the starting position of this window within the entire
* Cursor's result set.
- *
+ *
* @return the starting position of this window within the entire
* Cursor's result set.
*/
diff --git a/core/java/android/database/IBulkCursor.java b/core/java/android/database/IBulkCursor.java
index 24354fd..46790a3 100644
--- a/core/java/android/database/IBulkCursor.java
+++ b/core/java/android/database/IBulkCursor.java
@@ -27,11 +27,10 @@ import java.util.Map;
* This interface provides a low-level way to pass bulk cursor data across
* both process and language boundries. Application code should use the Cursor
* interface directly.
- *
+ *
* {@hide}
*/
-public interface IBulkCursor extends IInterface
-{
+public interface IBulkCursor extends IInterface {
/**
* Returns a BulkCursorWindow, which either has a reference to a shared
* memory segment with the rows, or an array of JSON strings.
@@ -60,7 +59,7 @@ public interface IBulkCursor extends IInterface
public boolean deleteRow(int position) throws RemoteException;
public void deactivate() throws RemoteException;
-
+
public void close() throws RemoteException;
public int requery(IContentObserver observer, CursorWindow window) throws RemoteException;
@@ -87,4 +86,3 @@ public interface IBulkCursor extends IInterface
static final int RESPOND_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 10;
static final int CLOSE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION + 11;
}
-
diff --git a/core/java/android/database/sqlite/SQLiteClosable.java b/core/java/android/database/sqlite/SQLiteClosable.java
index e589f34..71fa2c2 100644
--- a/core/java/android/database/sqlite/SQLiteClosable.java
+++ b/core/java/android/database/sqlite/SQLiteClosable.java
@@ -19,14 +19,15 @@ package android.database.sqlite;
import android.database.CursorWindow;
/**
- * An object create from a SQLiteDatabase that can be closed.
+ * An object created from a SQLiteDatabase that can be closed.
*/
-public abstract class SQLiteClosable {
+public abstract class SQLiteClosable {
private int mReferenceCount = 1;
private Object mLock = new Object();
+
protected abstract void onAllReferencesReleased();
- protected void onAllReferencesReleasedFromContainer(){}
-
+ protected void onAllReferencesReleasedFromContainer() {}
+
public void acquireReference() {
synchronized(mLock) {
if (mReferenceCount <= 0) {
@@ -36,7 +37,7 @@ public abstract class SQLiteClosable {
mReferenceCount++;
}
}
-
+
public void releaseReference() {
synchronized(mLock) {
mReferenceCount--;
@@ -45,14 +46,14 @@ public abstract class SQLiteClosable {
}
}
}
-
+
public void releaseReferenceFromContainer() {
synchronized(mLock) {
mReferenceCount--;
if (mReferenceCount == 0) {
onAllReferencesReleasedFromContainer();
}
- }
+ }
}
private String getObjInfo() {