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+/*
+ * Copyright (C) 2015 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.messaging.datamodel;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+
+import com.android.messaging.util.Assert;
+import com.google.common.annotations.VisibleForTesting;
+
+/**
+ * Holds parameters and data (such as content URI) for performing queries on the content provider.
+ * This class could then be used to perform a query using either a BoundCursorLoader or querying
+ * on the content resolver directly.
+ *
+ * This class is used for cases where the way to load a cursor is not fixed. For example,
+ * when using ContactUtil to query for phone numbers, the ContactPickerFragment wants to use
+ * a CursorLoader to asynchronously load the data and tie in nicely with its data binding
+ * paradigm, whereas ContactRecipientAdapter wants to synchronously perform the query on the
+ * worker thread.
+ */
+public class CursorQueryData {
+ protected final Uri mUri;
+ protected final String[] mProjection;
+ protected final String mSelection;
+ protected final String[] mSelectionArgs;
+ protected final String mSortOrder;
+ protected final Context mContext;
+
+ public CursorQueryData(final Context context, final Uri uri, final String[] projection,
+ final String selection, final String[] selectionArgs, final String sortOrder) {
+ mContext = context;
+ mUri = uri;
+ mProjection = projection;
+ mSelection = selection;
+ mSelectionArgs = selectionArgs;
+ mSortOrder = sortOrder;
+ }
+
+ public BoundCursorLoader createBoundCursorLoader(final String bindingId) {
+ return new BoundCursorLoader(bindingId, mContext, mUri, mProjection, mSelection,
+ mSelectionArgs, mSortOrder);
+ }
+
+ public Cursor performSynchronousQuery() {
+ Assert.isNotMainThread();
+ if (mUri == null) {
+ // See {@link #getEmptyQueryData}
+ return null;
+ } else {
+ return mContext.getContentResolver().query(mUri, mProjection, mSelection,
+ mSelectionArgs, mSortOrder);
+ }
+ }
+
+ @VisibleForTesting
+ public Uri getUri() {
+ return mUri;
+ }
+
+ /**
+ * Representation of an invalid query. {@link #performSynchronousQuery} will return
+ * a null Cursor.
+ */
+ public static CursorQueryData getEmptyQueryData() {
+ return new CursorQueryData(null, null, null, null, null, null);
+ }
+}