83 lines
3.0 KiB
Java
83 lines
3.0 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.messaging.datamodel;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import com.android.messaging.util.Assert;
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import com.google.common.annotations.VisibleForTesting;
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/**
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* Holds parameters and data (such as content URI) for performing queries on the content provider.
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* This class could then be used to perform a query using either a BoundCursorLoader or querying
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* on the content resolver directly.
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*
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* This class is used for cases where the way to load a cursor is not fixed. For example,
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* when using ContactUtil to query for phone numbers, the ContactPickerFragment wants to use
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* a CursorLoader to asynchronously load the data and tie in nicely with its data binding
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* paradigm, whereas ContactRecipientAdapter wants to synchronously perform the query on the
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* worker thread.
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*/
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public class CursorQueryData {
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protected final Uri mUri;
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protected final String[] mProjection;
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protected final String mSelection;
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protected final String[] mSelectionArgs;
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protected final String mSortOrder;
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protected final Context mContext;
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public CursorQueryData(final Context context, final Uri uri, final String[] projection,
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final String selection, final String[] selectionArgs, final String sortOrder) {
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mContext = context;
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mUri = uri;
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mProjection = projection;
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mSelection = selection;
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mSelectionArgs = selectionArgs;
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mSortOrder = sortOrder;
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}
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public BoundCursorLoader createBoundCursorLoader(final String bindingId) {
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return new BoundCursorLoader(bindingId, mContext, mUri, mProjection, mSelection,
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mSelectionArgs, mSortOrder);
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}
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public Cursor performSynchronousQuery() {
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Assert.isNotMainThread();
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if (mUri == null) {
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// See {@link #getEmptyQueryData}
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return null;
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} else {
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return mContext.getContentResolver().query(mUri, mProjection, mSelection,
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mSelectionArgs, mSortOrder);
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}
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}
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@VisibleForTesting
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public Uri getUri() {
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return mUri;
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}
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/**
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* Representation of an invalid query. {@link #performSynchronousQuery} will return
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* a null Cursor.
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*/
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public static CursorQueryData getEmptyQueryData() {
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return new CursorQueryData(null, null, null, null, null, null);
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}
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}
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