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-rw-r--r--java/com/android/dialer/calllog/datasources/CallLogDataSource.java67
-rw-r--r--java/com/android/dialer/calllog/datasources/CallLogMutations.java110
-rw-r--r--java/com/android/dialer/calllog/datasources/DataSources.java30
-rw-r--r--java/com/android/dialer/calllog/datasources/contacts/ContactsDataSource.java22
-rw-r--r--java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java209
-rw-r--r--java/com/android/dialer/calllog/datasources/util/RowCombiner.java53
6 files changed, 470 insertions, 21 deletions
diff --git a/java/com/android/dialer/calllog/datasources/CallLogDataSource.java b/java/com/android/dialer/calllog/datasources/CallLogDataSource.java
index 13d0b842d..3fff3ba53 100644
--- a/java/com/android/dialer/calllog/datasources/CallLogDataSource.java
+++ b/java/com/android/dialer/calllog/datasources/CallLogDataSource.java
@@ -16,13 +16,39 @@
package com.android.dialer.calllog.datasources;
+import android.content.ContentValues;
import android.content.Context;
-import android.database.sqlite.SQLiteDatabase;
import android.support.annotation.MainThread;
import android.support.annotation.WorkerThread;
-import com.android.dialer.calllog.database.CallLogMutations;
+import com.android.dialer.calllog.database.contract.AnnotatedCallLogContract;
+import java.util.List;
-/** A source of data for one or more columns in the annotated call log. */
+/**
+ * A source of data for one or more columns in the annotated call log.
+ *
+ * <p>Data sources have three lifecycle operations, which are always called on the same thread and
+ * in the same order for a particular "checkDirtyAndRebuild" cycle. However, not all operations are
+ * always invoked.
+ *
+ * <ol>
+ * <li>{@link #isDirty(Context)}: Invoked only if the framework doesn't yet know if a rebuild is
+ * necessary.
+ * <li>{@link #fill(Context, CallLogMutations)}: Invoked only if the framework determined a
+ * rebuild is necessary.
+ * <li>{@link #onSuccessfulFill(Context)}: Invoked if and only if fill was previously called and
+ * the mutations provided by the previous fill operation succeeded in being applied.
+ * </ol>
+ *
+ * <p>Because {@link #isDirty(Context)} is not always invoked, {@link #fill(Context,
+ * CallLogMutations)} shouldn't rely on any state saved during {@link #isDirty(Context)}. It
+ * <em>is</em> safe to assume that {@link #onSuccessfulFill(Context)} refers to the previous fill
+ * operation.
+ *
+ * <p>The same data source objects may be reused across multiple checkDirtyAndRebuild cycles, so
+ * implementors should take care to clear any internal state at the start of a new cycle.
+ *
+ * <p>{@link #coalesce(List)} may be called from any worker thread at any time.
+ */
public interface CallLogDataSource {
/**
@@ -35,6 +61,8 @@ public interface CallLogDataSource {
* <p>Most implementations of this method will rely on some sort of last modified timestamp. If it
* is impossible for a data source to be modified without the dialer application being notified,
* this method may immediately return false.
+ *
+ * @see CallLogDataSource class doc for complete lifecyle information
*/
@WorkerThread
boolean isDirty(Context appContext);
@@ -43,16 +71,39 @@ public interface CallLogDataSource {
* Computes the set of mutations necessary to update the annotated call log with respect to this
* data source.
*
+ * @see CallLogDataSource class doc for complete lifecyle information
* @param mutations the set of mutations which this method should contribute to. Note that it may
* contain inserts from the system call log, and these inserts should be modified by each data
* source.
*/
@WorkerThread
- void fill(
- Context appContext,
- SQLiteDatabase readableDatabase,
- long lastRebuildTimeMillis,
- CallLogMutations mutations);
+ void fill(Context appContext, CallLogMutations mutations);
+
+ /**
+ * Called after database mutations have been applied to all data sources. This is useful for
+ * saving state such as the timestamp of the last row processed in an underlying database. Note
+ * that all mutations across all data sources are applied in a single transaction.
+ *
+ * @see CallLogDataSource class doc for complete lifecyle information
+ */
+ @WorkerThread
+ void onSuccessfulFill(Context appContext);
+
+ /**
+ * Combines raw annotated call log rows into a single coalesced row.
+ *
+ * <p>May be called by any worker thread at any time so implementations should take care to be
+ * threadsafe. (Ideally no state should be required to implement this.)
+ *
+ * @param individualRowsSortedByTimestampDesc group of fully populated rows from {@link
+ * AnnotatedCallLogContract.AnnotatedCallLog} which need to be combined for display purposes.
+ * This method should not modify this list.
+ * @return a partial {@link AnnotatedCallLogContract.CoalescedAnnotatedCallLog} row containing
+ * only columns which this data source is responsible for, which is the result of aggregating
+ * {@code individualRowsSortedByTimestampDesc}.
+ */
+ @WorkerThread
+ ContentValues coalesce(List<ContentValues> individualRowsSortedByTimestampDesc);
@MainThread
void registerContentObservers(
diff --git a/java/com/android/dialer/calllog/datasources/CallLogMutations.java b/java/com/android/dialer/calllog/datasources/CallLogMutations.java
new file mode 100644
index 000000000..148601d68
--- /dev/null
+++ b/java/com/android/dialer/calllog/datasources/CallLogMutations.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2017 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.dialer.calllog.datasources;
+
+import android.content.ContentValues;
+import android.util.ArrayMap;
+import android.util.ArraySet;
+import com.android.dialer.common.Assert;
+
+/** A collection of mutations to the annotated call log. */
+public final class CallLogMutations {
+
+ private final ArrayMap<Long, ContentValues> inserts = new ArrayMap<>();
+ private final ArrayMap<Long, ContentValues> updates = new ArrayMap<>();
+ private final ArraySet<Long> deletes = new ArraySet<>();
+
+ /**
+ * @param contentValues an entire row not including the ID
+ * @throws IllegalStateException if this {@link CallLogMutations} already contains an insert,
+ * update, or delete with the provided id
+ */
+ public void insert(long id, ContentValues contentValues) {
+ Assert.checkArgument(!inserts.containsKey(id), "Can't insert row already scheduled for insert");
+ Assert.checkArgument(!updates.containsKey(id), "Can't insert row scheduled for update");
+ Assert.checkArgument(!deletes.contains(id), "Can't insert row scheduled for delete");
+
+ inserts.put(id, contentValues);
+ }
+
+ /**
+ * Stores a database update using the provided ID and content values. If this {@link
+ * CallLogMutations} object already contains an update with the specified ID, the existing content
+ * values are merged with the provided ones, with the provided ones overwriting the existing ones
+ * for values with the same key.
+ *
+ * @param contentValues the specific columns to update, not including the ID.
+ * @throws IllegalStateException if this {@link CallLogMutations} already contains an insert or
+ * delete with the provided id
+ */
+ public void update(long id, ContentValues contentValues) {
+ Assert.checkArgument(!inserts.containsKey(id), "Can't update row scheduled for insert");
+ Assert.checkArgument(!deletes.contains(id), "Can't delete row scheduled for delete");
+
+ ContentValues existingContentValues = updates.get(id);
+ if (existingContentValues != null) {
+ existingContentValues.putAll(contentValues);
+ } else {
+ updates.put(id, contentValues);
+ }
+ }
+
+ /**
+ * @throws IllegalStateException if this {@link CallLogMutations} already contains an insert,
+ * update, or delete with the provided id
+ */
+ public void delete(long id) {
+ Assert.checkArgument(!inserts.containsKey(id), "Can't delete row scheduled for insert");
+ Assert.checkArgument(!updates.containsKey(id), "Can't delete row scheduled for update");
+ Assert.checkArgument(!deletes.contains(id), "Can't delete row already scheduled for delete");
+
+ deletes.add(id);
+ }
+
+ public boolean isEmpty() {
+ return inserts.isEmpty() && updates.isEmpty() && deletes.isEmpty();
+ }
+
+ /**
+ * Get the pending inserts.
+ *
+ * @return the pending inserts where the key is the annotated call log database ID and the values
+ * are values to be inserted (not including the ID)
+ */
+ public ArrayMap<Long, ContentValues> getInserts() {
+ return inserts;
+ }
+
+ /**
+ * Get the pending updates.
+ *
+ * @return the pending updates where the key is the annotated call log database ID and the values
+ * are values to be updated (not including the ID)
+ */
+ public ArrayMap<Long, ContentValues> getUpdates() {
+ return updates;
+ }
+
+ /**
+ * Get the pending deletes.
+ *
+ * @return the annotated call log database IDs corresponding to the rows to be deleted
+ */
+ public ArraySet<Long> getDeletes() {
+ return deletes;
+ }
+}
diff --git a/java/com/android/dialer/calllog/datasources/DataSources.java b/java/com/android/dialer/calllog/datasources/DataSources.java
new file mode 100644
index 000000000..911ca3fa3
--- /dev/null
+++ b/java/com/android/dialer/calllog/datasources/DataSources.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 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.dialer.calllog.datasources;
+
+import com.android.dialer.calllog.datasources.systemcalllog.SystemCallLogDataSource;
+import java.util.List;
+
+/** Immutable lists of data sources used to populate the annotated call log. */
+public interface DataSources {
+
+ SystemCallLogDataSource getSystemCallLogDataSource();
+
+ List<CallLogDataSource> getDataSourcesIncludingSystemCallLog();
+
+ List<CallLogDataSource> getDataSourcesExcludingSystemCallLog();
+}
diff --git a/java/com/android/dialer/calllog/datasources/contacts/ContactsDataSource.java b/java/com/android/dialer/calllog/datasources/contacts/ContactsDataSource.java
index 355940f6a..e9538daab 100644
--- a/java/com/android/dialer/calllog/datasources/contacts/ContactsDataSource.java
+++ b/java/com/android/dialer/calllog/datasources/contacts/ContactsDataSource.java
@@ -16,13 +16,16 @@
package com.android.dialer.calllog.datasources.contacts;
+import android.content.ContentValues;
import android.content.Context;
-import android.database.sqlite.SQLiteDatabase;
import android.support.annotation.MainThread;
import android.support.annotation.WorkerThread;
-import com.android.dialer.calllog.database.CallLogMutations;
+import com.android.dialer.calllog.database.contract.AnnotatedCallLogContract.AnnotatedCallLog;
import com.android.dialer.calllog.datasources.CallLogDataSource;
+import com.android.dialer.calllog.datasources.CallLogMutations;
+import com.android.dialer.calllog.datasources.util.RowCombiner;
import com.android.dialer.common.Assert;
+import java.util.List;
import javax.inject.Inject;
/** Responsible for maintaining the contacts related columns in the annotated call log. */
@@ -44,13 +47,24 @@ public final class ContactsDataSource implements CallLogDataSource {
@Override
public void fill(
Context appContext,
- SQLiteDatabase readableDatabase,
- long lastRebuildTimeMillis,
CallLogMutations mutations) {
Assert.isWorkerThread();
// TODO: Implementation.
}
+ @Override
+ public void onSuccessfulFill(Context appContext) {
+ // TODO: Implementation.
+ }
+
+ @Override
+ public ContentValues coalesce(List<ContentValues> individualRowsSortedByTimestampDesc) {
+ // TODO: Implementation.
+ return new RowCombiner(individualRowsSortedByTimestampDesc)
+ .useSingleValueString(AnnotatedCallLog.CONTACT_NAME)
+ .combine();
+ }
+
@MainThread
@Override
public void registerContentObservers(
diff --git a/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
index ea6663fbe..be2df6043 100644
--- a/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
+++ b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
@@ -16,28 +16,49 @@
package com.android.dialer.calllog.datasources.systemcalllog;
+import android.Manifest.permission;
+import android.annotation.TargetApi;
+import android.content.ContentValues;
import android.content.Context;
import android.database.ContentObserver;
-import android.database.sqlite.SQLiteDatabase;
+import android.database.Cursor;
import android.net.Uri;
+import android.os.Build;
import android.os.Handler;
+import android.preference.PreferenceManager;
import android.provider.CallLog;
+import android.provider.CallLog.Calls;
import android.support.annotation.MainThread;
+import android.support.annotation.Nullable;
+import android.support.annotation.VisibleForTesting;
import android.support.annotation.WorkerThread;
-import com.android.dialer.calllog.database.CallLogMutations;
+import android.text.TextUtils;
+import android.util.ArraySet;
+import com.android.dialer.calllog.database.contract.AnnotatedCallLogContract.AnnotatedCallLog;
import com.android.dialer.calllog.datasources.CallLogDataSource;
+import com.android.dialer.calllog.datasources.CallLogMutations;
+import com.android.dialer.calllog.datasources.util.RowCombiner;
import com.android.dialer.common.Assert;
import com.android.dialer.common.LogUtil;
import com.android.dialer.common.concurrent.ThreadUtil;
import com.android.dialer.util.PermissionsUtil;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
import javax.inject.Inject;
/**
* Responsible for defining the rows in the annotated call log and maintaining the columns in it
* which are derived from the system call log.
*/
+@SuppressWarnings("MissingPermission")
public class SystemCallLogDataSource implements CallLogDataSource {
+ @VisibleForTesting
+ static final String PREF_LAST_TIMESTAMP_PROCESSED = "systemCallLogLastTimestampProcessed";
+
+ @Nullable private Long lastTimestampProcessed;
+
@Inject
public SystemCallLogDataSource() {}
@@ -47,6 +68,8 @@ public class SystemCallLogDataSource implements CallLogDataSource {
Context appContext, ContentObserverCallbacks contentObserverCallbacks) {
Assert.isMainThread();
+ LogUtil.enterBlock("SystemCallLogDataSource.registerContentObservers");
+
if (!PermissionsUtil.hasCallLogReadPermissions(appContext)) {
LogUtil.i("SystemCallLogDataSource.registerContentObservers", "no call log permissions");
return;
@@ -77,17 +100,185 @@ public class SystemCallLogDataSource implements CallLogDataSource {
@WorkerThread
@Override
- public void fill(
- Context appContext,
- SQLiteDatabase readableDatabase,
- long lastRebuildTimeMillis,
- CallLogMutations mutations) {
+ public void fill(Context appContext, CallLogMutations mutations) {
Assert.isWorkerThread();
+ lastTimestampProcessed = null;
+
+ if (!PermissionsUtil.hasPermission(appContext, permission.READ_CALL_LOG)) {
+ LogUtil.i("SystemCallLogDataSource.fill", "no call log permissions");
+ return;
+ }
+
// This data source should always run first so the mutations should always be empty.
- Assert.checkState(mutations.isEmpty());
+ Assert.checkArgument(mutations.isEmpty());
+
+ Set<Long> annotatedCallLogIds = getAnnotatedCallLogIds(appContext);
+
+ LogUtil.i(
+ "SystemCallLogDataSource.fill",
+ "found %d existing annotated call log ids",
+ annotatedCallLogIds.size());
+
+ handleInsertsAndUpdates(appContext, mutations, annotatedCallLogIds);
+ handleDeletes(appContext, annotatedCallLogIds, mutations);
+ }
+
+ @WorkerThread
+ @Override
+ public void onSuccessfulFill(Context appContext) {
+ // If a fill operation was a no-op, lastTimestampProcessed could still be null.
+ if (lastTimestampProcessed != null) {
+ PreferenceManager.getDefaultSharedPreferences(appContext)
+ .edit()
+ .putLong(PREF_LAST_TIMESTAMP_PROCESSED, lastTimestampProcessed)
+ .commit();
+ }
+ }
+
+ @Override
+ public ContentValues coalesce(List<ContentValues> individualRowsSortedByTimestampDesc) {
+ // TODO: Complete implementation.
+ return new RowCombiner(individualRowsSortedByTimestampDesc)
+ .useMostRecentLong(AnnotatedCallLog.TIMESTAMP)
+ .combine();
+ }
+
+ @TargetApi(Build.VERSION_CODES.M) // Uses try-with-resources
+ private void handleInsertsAndUpdates(
+ Context appContext, CallLogMutations mutations, Set<Long> existingAnnotatedCallLogIds) {
+ long previousTimestampProcessed =
+ PreferenceManager.getDefaultSharedPreferences(appContext)
+ .getLong(PREF_LAST_TIMESTAMP_PROCESSED, 0L);
+
+ try (Cursor cursor =
+ appContext
+ .getContentResolver()
+ .query(
+ Calls.CONTENT_URI, // Excludes voicemail
+ new String[] {Calls._ID, Calls.DATE, Calls.LAST_MODIFIED},
+ Calls.LAST_MODIFIED + " > ?",
+ new String[] {String.valueOf(previousTimestampProcessed)},
+ Calls.LAST_MODIFIED + " DESC LIMIT 1000")) {
+
+ if (cursor == null) {
+ LogUtil.e("SystemCallLogDataSource.handleInsertsAndUpdates", "null cursor");
+ return;
+ }
+
+ LogUtil.i(
+ "SystemCallLogDataSource.handleInsertsAndUpdates",
+ "found %d entries to insert/update",
+ cursor.getCount());
- // TODO: Implementation.
+ if (cursor.moveToFirst()) {
+ int idColumn = cursor.getColumnIndexOrThrow(Calls._ID);
+ int dateColumn = cursor.getColumnIndexOrThrow(Calls.DATE);
+ int lastModifiedColumn = cursor.getColumnIndexOrThrow(Calls.LAST_MODIFIED);
+
+ // The cursor orders by LAST_MODIFIED DESC, so the first result is the most recent timestamp
+ // processed.
+ lastTimestampProcessed = cursor.getLong(lastModifiedColumn);
+ do {
+ long id = cursor.getLong(idColumn);
+ long date = cursor.getLong(dateColumn);
+
+ ContentValues contentValues = new ContentValues();
+ contentValues.put(AnnotatedCallLog.TIMESTAMP, date);
+
+ if (existingAnnotatedCallLogIds.contains(id)) {
+ mutations.update(id, contentValues);
+ } else {
+ mutations.insert(id, contentValues);
+ }
+ } while (cursor.moveToNext());
+ } // else no new results, do nothing.
+ }
+ }
+
+ private static void handleDeletes(
+ Context appContext, Set<Long> existingAnnotatedCallLogIds, CallLogMutations mutations) {
+ Set<Long> systemCallLogIds =
+ getIdsFromSystemCallLogThatMatch(appContext, existingAnnotatedCallLogIds);
+ LogUtil.i(
+ "SystemCallLogDataSource.handleDeletes",
+ "found %d entries in system call log",
+ systemCallLogIds.size());
+ Set<Long> idsInAnnotatedCallLogNoLongerInSystemCallLog = new ArraySet<>();
+ idsInAnnotatedCallLogNoLongerInSystemCallLog.addAll(existingAnnotatedCallLogIds);
+ idsInAnnotatedCallLogNoLongerInSystemCallLog.removeAll(systemCallLogIds);
+
+ LogUtil.i(
+ "SystemCallLogDataSource.handleDeletes",
+ "found %d call log entries to remove",
+ idsInAnnotatedCallLogNoLongerInSystemCallLog.size());
+
+ for (long id : idsInAnnotatedCallLogNoLongerInSystemCallLog) {
+ mutations.delete(id);
+ }
+ }
+
+ @TargetApi(Build.VERSION_CODES.M) // Uses try-with-resources
+ private static Set<Long> getAnnotatedCallLogIds(Context appContext) {
+ ArraySet<Long> ids = new ArraySet<>();
+
+ try (Cursor cursor =
+ appContext
+ .getContentResolver()
+ .query(
+ AnnotatedCallLog.CONTENT_URI,
+ new String[] {AnnotatedCallLog._ID},
+ null,
+ null,
+ null)) {
+
+ if (cursor == null) {
+ LogUtil.e("SystemCallLogDataSource.getAnnotatedCallLogIds", "null cursor");
+ return ids;
+ }
+
+ if (cursor.moveToFirst()) {
+ int idColumn = cursor.getColumnIndexOrThrow(AnnotatedCallLog._ID);
+ do {
+ ids.add(cursor.getLong(idColumn));
+ } while (cursor.moveToNext());
+ }
+ }
+ return ids;
+ }
+
+ @TargetApi(Build.VERSION_CODES.M) // Uses try-with-resources
+ private static Set<Long> getIdsFromSystemCallLogThatMatch(
+ Context appContext, Set<Long> matchingIds) {
+ ArraySet<Long> ids = new ArraySet<>();
+
+ String[] questionMarks = new String[matchingIds.size()];
+ Arrays.fill(questionMarks, "?");
+ String whereClause = (Calls._ID + " in (") + TextUtils.join(",", questionMarks) + ")";
+ String[] whereArgs = new String[matchingIds.size()];
+ int i = 0;
+ for (long id : matchingIds) {
+ whereArgs[i++] = String.valueOf(id);
+ }
+
+ try (Cursor cursor =
+ appContext
+ .getContentResolver()
+ .query(Calls.CONTENT_URI, new String[] {Calls._ID}, whereClause, whereArgs, null)) {
+
+ if (cursor == null) {
+ LogUtil.e("SystemCallLogDataSource.getIdsFromSystemCallLog", "null cursor");
+ return ids;
+ }
+
+ if (cursor.moveToFirst()) {
+ int idColumn = cursor.getColumnIndexOrThrow(Calls._ID);
+ do {
+ ids.add(cursor.getLong(idColumn));
+ } while (cursor.moveToNext());
+ }
+ return ids;
+ }
}
private static class CallLogObserver extends ContentObserver {
diff --git a/java/com/android/dialer/calllog/datasources/util/RowCombiner.java b/java/com/android/dialer/calllog/datasources/util/RowCombiner.java
new file mode 100644
index 000000000..0c7be1e27
--- /dev/null
+++ b/java/com/android/dialer/calllog/datasources/util/RowCombiner.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2017 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.dialer.calllog.datasources.util;
+
+import android.content.ContentValues;
+import com.android.dialer.common.Assert;
+import java.util.Iterator;
+import java.util.List;
+
+/** Convenience class for aggregating row values. */
+public class RowCombiner {
+ private final List<ContentValues> individualRowsSortedByTimestampDesc;
+ private final ContentValues combinedRow = new ContentValues();
+
+ public RowCombiner(List<ContentValues> individualRowsSortedByTimestampDesc) {
+ Assert.checkArgument(!individualRowsSortedByTimestampDesc.isEmpty());
+ this.individualRowsSortedByTimestampDesc = individualRowsSortedByTimestampDesc;
+ }
+
+ /** Use the most recent value for the specified column. */
+ public RowCombiner useMostRecentLong(String columnName) {
+ combinedRow.put(columnName, individualRowsSortedByTimestampDesc.get(0).getAsLong(columnName));
+ return this;
+ }
+
+ /** Asserts that all column values for the given column name are the same, and uses it. */
+ public RowCombiner useSingleValueString(String columnName) {
+ Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator();
+ String singleValue = iterator.next().getAsString(columnName);
+ while (iterator.hasNext()) {
+ Assert.checkState(iterator.next().getAsString(columnName).equals(singleValue));
+ }
+ combinedRow.put(columnName, singleValue);
+ return this;
+ }
+
+ public ContentValues combine() {
+ return combinedRow;
+ }
+}