mirror of https://github.com/tasks/tasks
Replace paging library with @RawQuery
Alex Baker
5 years ago
parent
7cd7699b95
commit
f34cdcaa68
@ -1,102 +0,0 @@
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package org.tasks.data;
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import android.database.Cursor;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.annotation.WorkerThread;
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import androidx.paging.PositionalDataSource;
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import androidx.room.RoomDatabase;
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import com.todoroo.astrid.data.Task;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import org.tasks.analytics.Tracker;
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public class LimitOffsetDataSource extends PositionalDataSource<Task> {
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private final String mCountQuery;
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private final String mLimitOffsetQuery;
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private final RoomDatabase mDb;
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public LimitOffsetDataSource(RoomDatabase db, String query) {
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mDb = db;
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mCountQuery = "SELECT COUNT(*) FROM ( " + query + " )";
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mLimitOffsetQuery = "SELECT * FROM ( " + query + " ) LIMIT ? OFFSET ?";
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}
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@WorkerThread
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private int countItems() {
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Cursor cursor;
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try {
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cursor = mDb.query(mCountQuery, null);
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} catch (Exception e) {
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Tracker.report(e);
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return 0;
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}
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try {
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if (cursor.moveToFirst()) {
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return cursor.getInt(0);
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}
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return 0;
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} finally {
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cursor.close();
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}
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}
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@SuppressWarnings("WeakerAccess")
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protected List<Task> convertRows(Cursor cursor) {
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List<Task> result = new ArrayList<>();
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while (cursor.moveToNext()) {
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result.add(new Task(cursor));
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}
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return result;
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}
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@Nullable
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@WorkerThread
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private List<Task> loadRange(int startPosition, int loadCount) {
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Cursor cursor = mDb.query(mLimitOffsetQuery, new Object[] {loadCount, startPosition});
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//noinspection TryFinallyCanBeTryWithResources
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try {
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return convertRows(cursor);
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} finally {
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cursor.close();
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}
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}
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@Override
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public void loadInitial(
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@NonNull LoadInitialParams params, @NonNull LoadInitialCallback<Task> callback) {
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int totalCount = countItems();
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if (totalCount == 0) {
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callback.onResult(Collections.emptyList(), 0, 0);
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return;
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}
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// bound the size requested, based on known count
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final int firstLoadPosition = computeInitialLoadPosition(params, totalCount);
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final int firstLoadSize = computeInitialLoadSize(params, firstLoadPosition, totalCount);
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// convert from legacy behavior
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List<Task> list = loadRange(firstLoadPosition, firstLoadSize);
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if (list != null && list.size() == firstLoadSize) {
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callback.onResult(list, firstLoadPosition, totalCount);
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} else {
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// null list, or size doesn't match request
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// The size check is a WAR for Room 1.0, subsequent versions do the check in Room
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invalidate();
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}
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}
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@WorkerThread
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@Override
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public void loadRange(
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@NonNull LoadRangeParams params, @NonNull LoadRangeCallback<Task> callback) {
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List<Task> list = loadRange(params.startPosition, params.loadSize);
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if (list != null) {
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callback.onResult(list);
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} else {
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invalidate();
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}
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}
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}
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@ -0,0 +1,140 @@
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package org.tasks.data;
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import androidx.room.Embedded;
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import com.todoroo.astrid.data.Task;
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public class TaskContainer {
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@Embedded public Task task;
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public String tags;
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public String googletask;
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public String caldav;
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public int order;
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public int indent;
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public int getIndent() {
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return indent;
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}
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public void setIndent(int indent) {
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this.indent = indent;
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}
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public String getTagsString() {
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return tags;
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}
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public String getGoogleTaskList() {
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return googletask;
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}
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public String getCaldav() {
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return caldav;
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}
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public String getNotes() {
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return task.getNotes();
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}
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public boolean hasNotes() {
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return task.hasNotes();
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}
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public String getTitle() {
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return task.getTitle();
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}
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public boolean isHidden() {
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return task.isHidden();
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}
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public boolean isCompleted() {
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return task.isCompleted();
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}
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public int getPriority() {
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return task.getPriority();
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}
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public String getRecurrence() {
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return task.getRecurrence();
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}
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public boolean hasDueDate() {
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return task.hasDueDate();
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}
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public boolean isOverdue() {
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return task.isOverdue();
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}
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public long getDueDate() {
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return task.getDueDate();
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}
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public Task getTask() {
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return task;
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}
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public long getId() {
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return task.getId();
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) {
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return true;
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}
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if (o == null || getClass() != o.getClass()) {
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return false;
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}
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TaskContainer that = (TaskContainer) o;
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if (indent != that.indent) {
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return false;
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}
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if (task != null ? !task.equals(that.task) : that.task != null) {
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return false;
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}
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if (tags != null ? !tags.equals(that.tags) : that.tags != null) {
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return false;
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}
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if (googletask != null ? !googletask.equals(that.googletask) : that.googletask != null) {
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return false;
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}
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return caldav != null ? caldav.equals(that.caldav) : that.caldav == null;
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}
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@Override
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public int hashCode() {
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int result = task != null ? task.hashCode() : 0;
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result = 31 * result + (tags != null ? tags.hashCode() : 0);
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result = 31 * result + (googletask != null ? googletask.hashCode() : 0);
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result = 31 * result + (caldav != null ? caldav.hashCode() : 0);
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result = 31 * result + indent;
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return result;
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}
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@Override
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public String toString() {
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return "TaskContainer{"
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+ "task="
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+ task
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+ ", tags='"
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+ tags
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+ '\''
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+ ", googletask='"
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+ googletask
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+ '\''
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+ ", caldav='"
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+ caldav
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+ '\''
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+ ", indent="
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+ indent
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+ '}';
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}
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public String getUuid() {
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return task.getUuid();
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}
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}
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