| /* |
| * Copyright 2020 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; |
| |
| import android.annotation.NonNull; |
| import android.util.ArrayMap; |
| import android.util.ArraySet; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| /** |
| * Encapsulates a request to retrieve documents by namespace and IDs from the {@link |
| * AppSearchSession} database. |
| * |
| * @see AppSearchSession#getByDocumentId |
| */ |
| public final class GetByDocumentIdRequest { |
| /** |
| * Schema type to be used in {@link GetByDocumentIdRequest.Builder#addProjection} to apply |
| * property paths to all results, excepting any types that have had their own, specific property |
| * paths set. |
| */ |
| public static final String PROJECTION_SCHEMA_TYPE_WILDCARD = "*"; |
| |
| private final String mNamespace; |
| private final Set<String> mIds; |
| private final Map<String, List<String>> mTypePropertyPathsMap; |
| |
| GetByDocumentIdRequest( |
| @NonNull String namespace, |
| @NonNull Set<String> ids, |
| @NonNull Map<String, List<String>> typePropertyPathsMap) { |
| mNamespace = Objects.requireNonNull(namespace); |
| mIds = Objects.requireNonNull(ids); |
| mTypePropertyPathsMap = Objects.requireNonNull(typePropertyPathsMap); |
| } |
| |
| /** Returns the namespace attached to the request. */ |
| @NonNull |
| public String getNamespace() { |
| return mNamespace; |
| } |
| |
| /** Returns the set of document IDs attached to the request. */ |
| @NonNull |
| public Set<String> getIds() { |
| return Collections.unmodifiableSet(mIds); |
| } |
| |
| /** |
| * Returns a map from schema type to property paths to be used for projection. |
| * |
| * <p>If the map is empty, then all properties will be retrieved for all results. |
| * |
| * <p>Calling this function repeatedly is inefficient. Prefer to retain the Map returned by this |
| * function, rather than calling it multiple times. |
| */ |
| @NonNull |
| public Map<String, List<String>> getProjections() { |
| Map<String, List<String>> copy = new ArrayMap<>(); |
| for (Map.Entry<String, List<String>> entry : mTypePropertyPathsMap.entrySet()) { |
| copy.put(entry.getKey(), new ArrayList<>(entry.getValue())); |
| } |
| return copy; |
| } |
| |
| /** |
| * Returns a map from schema type to property paths to be used for projection. |
| * |
| * <p>If the map is empty, then all properties will be retrieved for all results. |
| * |
| * <p>A more efficient version of {@link #getProjections}, but it returns a modifiable map. This |
| * is not meant to be unhidden and should only be used by internal classes. |
| * |
| * @hide |
| */ |
| @NonNull |
| public Map<String, List<String>> getProjectionsInternal() { |
| return mTypePropertyPathsMap; |
| } |
| |
| /** Builder for {@link GetByDocumentIdRequest} objects. */ |
| public static final class Builder { |
| private final String mNamespace; |
| private ArraySet<String> mIds = new ArraySet<>(); |
| private ArrayMap<String, List<String>> mProjectionTypePropertyPaths = new ArrayMap<>(); |
| private boolean mBuilt = false; |
| |
| /** Creates a {@link GetByDocumentIdRequest.Builder} instance. */ |
| public Builder(@NonNull String namespace) { |
| mNamespace = Objects.requireNonNull(namespace); |
| } |
| |
| /** Adds one or more document IDs to the request. */ |
| @NonNull |
| public Builder addIds(@NonNull String... ids) { |
| Objects.requireNonNull(ids); |
| resetIfBuilt(); |
| return addIds(Arrays.asList(ids)); |
| } |
| |
| /** Adds a collection of IDs to the request. */ |
| @NonNull |
| public Builder addIds(@NonNull Collection<String> ids) { |
| Objects.requireNonNull(ids); |
| resetIfBuilt(); |
| mIds.addAll(ids); |
| return this; |
| } |
| |
| /** |
| * Adds property paths for the specified type to be used for projection. If property paths |
| * are added for a type, then only the properties referred to will be retrieved for results |
| * of that type. If a property path that is specified isn't present in a result, it will be |
| * ignored for that result. Property paths cannot be null. |
| * |
| * <p>If no property paths are added for a particular type, then all properties of results |
| * of that type will be retrieved. |
| * |
| * <p>If property path is added for the {@link |
| * GetByDocumentIdRequest#PROJECTION_SCHEMA_TYPE_WILDCARD}, then those property paths will |
| * apply to all results, excepting any types that have their own, specific property paths |
| * set. |
| * |
| * @see SearchSpec.Builder#addProjection |
| */ |
| @NonNull |
| public Builder addProjection( |
| @NonNull String schemaType, @NonNull Collection<String> propertyPaths) { |
| Objects.requireNonNull(schemaType); |
| Objects.requireNonNull(propertyPaths); |
| resetIfBuilt(); |
| List<String> propertyPathsList = new ArrayList<>(propertyPaths.size()); |
| for (String propertyPath : propertyPaths) { |
| Objects.requireNonNull(propertyPath); |
| propertyPathsList.add(propertyPath); |
| } |
| mProjectionTypePropertyPaths.put(schemaType, propertyPathsList); |
| return this; |
| } |
| |
| /** Builds a new {@link GetByDocumentIdRequest}. */ |
| @NonNull |
| public GetByDocumentIdRequest build() { |
| mBuilt = true; |
| return new GetByDocumentIdRequest(mNamespace, mIds, mProjectionTypePropertyPaths); |
| } |
| |
| private void resetIfBuilt() { |
| if (mBuilt) { |
| mIds = new ArraySet<>(mIds); |
| // No need to clone each propertyPathsList inside mProjectionTypePropertyPaths since |
| // the builder only replaces it, never adds to it. So even if the builder is used |
| // again, the previous one will remain with the object. |
| mProjectionTypePropertyPaths = new ArrayMap<>(mProjectionTypePropertyPaths); |
| mBuilt = false; |
| } |
| } |
| } |
| } |