mirror of https://github.com/M66B/FairEmail.git
98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
/*
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* Copyright 2018 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 androidx.room.util;
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import android.database.Cursor;
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import androidx.annotation.RestrictTo;
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import androidx.sqlite.db.SupportSQLiteDatabase;
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/**
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* A data class that holds the information about a view.
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* <p>
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* This derives information from sqlite_master.
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* <p>
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* Even though SQLite column names are case insensitive, this class uses case sensitive matching.
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*
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* @hide
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*/
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@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
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public final class ViewInfo {
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/**
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* The view name
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*/
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public final String name;
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/**
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* The SQL of CREATE VIEW.
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*/
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public final String sql;
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public ViewInfo(String name, String sql) {
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this.name = name;
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this.sql = sql;
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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) return true;
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if (!(o instanceof ViewInfo)) return false;
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ViewInfo viewInfo = (ViewInfo) o;
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return (name != null ? name.equals(viewInfo.name) : viewInfo.name == null)
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&& (sql != null ? sql.equals(viewInfo.sql) : viewInfo.sql == null);
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}
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@Override
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public int hashCode() {
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int result = name != null ? name.hashCode() : 0;
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result = 31 * result + (sql != null ? sql.hashCode() : 0);
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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 "ViewInfo{"
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+ "name='" + name + '\''
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+ ", sql='" + sql + '\''
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+ '}';
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}
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/**
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* Reads the view information from the given database.
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*
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* @param database The database to read the information from.
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* @param viewName The view name.
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* @return A ViewInfo containing the schema information for the provided view name.
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*/
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@SuppressWarnings("SameParameterValue")
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public static ViewInfo read(SupportSQLiteDatabase database, String viewName) {
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Cursor cursor = database.query("SELECT name, sql FROM sqlite_master "
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+ "WHERE type = 'view' AND name = '" + viewName + "'");
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//noinspection TryFinallyCanBeTryWithResources
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try {
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if (cursor.moveToFirst()) {
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return new ViewInfo(cursor.getString(0), cursor.getString(1));
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} else {
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return new ViewInfo(viewName, null);
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}
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} finally {
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cursor.close();
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}
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}
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}
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