| /* |
| * Copyright 2021 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 android.app.appsearch.util; |
| |
| import android.annotation.NonNull; |
| import android.app.appsearch.AppSearchResult; |
| import android.app.appsearch.AppSearchSchema; |
| import android.app.appsearch.Migrator; |
| import android.app.appsearch.SetSchemaResponse; |
| import android.app.appsearch.exceptions.AppSearchException; |
| import android.util.ArrayMap; |
| import android.util.ArraySet; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Utilities for schema migration. |
| * |
| * @hide |
| */ |
| public final class SchemaMigrationUtil { |
| private SchemaMigrationUtil() {} |
| |
| /** |
| * Returns all active {@link Migrator}s that need to be triggered in this migration. |
| * |
| * <p>{@link Migrator#shouldMigrate} returns {@code true} will make the {@link Migrator} active. |
| */ |
| @NonNull |
| public static Map<String, Migrator> getActiveMigrators( |
| @NonNull Set<AppSearchSchema> existingSchemas, |
| @NonNull Map<String, Migrator> migrators, |
| int currentVersion, |
| int finalVersion) { |
| if (currentVersion == finalVersion) { |
| return Collections.emptyMap(); |
| } |
| Set<String> existingTypes = new ArraySet<>(existingSchemas.size()); |
| for (AppSearchSchema schema : existingSchemas) { |
| existingTypes.add(schema.getSchemaType()); |
| } |
| |
| Map<String, Migrator> activeMigrators = new ArrayMap<>(); |
| for (Map.Entry<String, Migrator> entry : migrators.entrySet()) { |
| // The device contains the source type, and we should trigger migration for the type. |
| String schemaType = entry.getKey(); |
| Migrator migrator = entry.getValue(); |
| if (existingTypes.contains(schemaType) |
| && migrator.shouldMigrate(currentVersion, finalVersion)) { |
| activeMigrators.put(schemaType, migrator); |
| } |
| } |
| return activeMigrators; |
| } |
| |
| /** |
| * Checks the setSchema() call won't delete any types or has incompatible types after all {@link |
| * Migrator} has been triggered.. |
| */ |
| public static void checkDeletedAndIncompatibleAfterMigration( |
| @NonNull SetSchemaResponse setSchemaResponse, @NonNull Set<String> activeMigrators) |
| throws AppSearchException { |
| Set<String> unmigratedIncompatibleTypes = |
| new ArraySet<>(setSchemaResponse.getIncompatibleTypes()); |
| unmigratedIncompatibleTypes.removeAll(activeMigrators); |
| |
| Set<String> unmigratedDeletedTypes = new ArraySet<>(setSchemaResponse.getDeletedTypes()); |
| unmigratedDeletedTypes.removeAll(activeMigrators); |
| |
| // check if there are any unmigrated incompatible types or deleted types. If there |
| // are, we will getActiveMigratorsthrow an exception. That's the only case we |
| // swallowed in the AppSearchImpl#setSchema(). |
| // Since the force override is false, the schema will not have been set if there are |
| // any incompatible or deleted types. |
| checkDeletedAndIncompatible(unmigratedDeletedTypes, unmigratedIncompatibleTypes); |
| } |
| |
| /** Checks the setSchema() call won't delete any types or has incompatible types. */ |
| public static void checkDeletedAndIncompatible( |
| @NonNull Set<String> deletedTypes, @NonNull Set<String> incompatibleTypes) |
| throws AppSearchException { |
| if (deletedTypes.size() > 0 || incompatibleTypes.size() > 0) { |
| String newMessage = |
| "Schema is incompatible." |
| + "\n Deleted types: " |
| + deletedTypes |
| + "\n Incompatible types: " |
| + incompatibleTypes; |
| throw new AppSearchException(AppSearchResult.RESULT_INVALID_SCHEMA, newMessage); |
| } |
| } |
| } |