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Commit 881a0b52 authored by Automerger Merge Worker's avatar Automerger Merge Worker
Browse files

Merge "Refine TC request classes." into rvc-dev am: 031fe36d am: 94903244 am: 5c5425a8 

Change-Id: Ife8b75ca378d666e7347c3896f9ace06750db41c
parents f8c2e8fe 5c5425a8

core/java/android/view/textclassifier/ConversationActions.java

+12 −56
Original line number Diff line number Diff line
@@ -21,15 +21,12 @@ import android.annotation.IntRange; 
import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.StringDef;

import android.annotation.UserIdInt;

import android.app.Person;

import android.os.Bundle;

import android.os.Parcel;

import android.os.Parcelable;

import android.os.UserHandle;

import android.text.SpannedString;



import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.util.Preconditions;



import java.lang.annotation.Retention;
@@ -317,13 +314,9 @@ public final class ConversationActions implements Parcelable { 
        @NonNull

        @Hint

        private final List<String> mHints;

        @Nullable

        private String mCallingPackageName;

        @UserIdInt

        private int mUserId = UserHandle.USER_NULL;

        @NonNull

        private Bundle mExtras;

        private boolean mUseDefaultTextClassifier;

        @Nullable private SystemTextClassifierMetadata mSystemTcMetadata;



        private Request(

                @NonNull List<Message> conversation,
@@ -345,10 +338,8 @@ public final class ConversationActions implements Parcelable { 
            int maxSuggestions = in.readInt();

            List<String> hints = new ArrayList<>();

            in.readStringList(hints);

            String callingPackageName = in.readString();

            int userId = in.readInt();

            Bundle extras = in.readBundle();

            boolean useDefaultTextClassifier = in.readBoolean();

            SystemTextClassifierMetadata systemTcMetadata = in.readParcelable(null);



            Request request = new Request(

                    conversation,
@@ -356,9 +347,7 @@ public final class ConversationActions implements Parcelable { 
                    maxSuggestions,

                    hints,

                    extras);

            request.setCallingPackageName(callingPackageName);

            request.setUserId(userId);

            request.setUseDefaultTextClassifier(useDefaultTextClassifier);

            request.setSystemTextClassifierMetadata(systemTcMetadata);

            return request;

        }
@@ -368,10 +357,8 @@ public final class ConversationActions implements Parcelable { 
            parcel.writeParcelable(mTypeConfig, flags);

            parcel.writeInt(mMaxSuggestions);

            parcel.writeStringList(mHints);

            parcel.writeString(mCallingPackageName);

            parcel.writeInt(mUserId);

            parcel.writeBundle(mExtras);

            parcel.writeBoolean(mUseDefaultTextClassifier);

            parcel.writeParcelable(mSystemTcMetadata, flags);

        }



        @Override
@@ -420,63 +407,32 @@ public final class ConversationActions implements Parcelable { 
            return mHints;

        }



        /**

         * Sets the name of the package that is sending this request.

         * <p>

         * Package-private for SystemTextClassifier's use.

         * @hide

         */

        @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)

        public void setCallingPackageName(@Nullable String callingPackageName) {

            mCallingPackageName = callingPackageName;

        }



        /**

         * Returns the name of the package that sent this request.

         * This returns {@code null} if no calling package name is set.

         */

        @Nullable

        public String getCallingPackageName() {

            return mCallingPackageName;

            return mSystemTcMetadata != null ? mSystemTcMetadata.getCallingPackageName() : null;

        }



        /**

         * Sets the id of the user that sent this request.

         * <p>

         * Package-private for SystemTextClassifier's use.

         * @hide

         */

        void setUserId(@UserIdInt int userId) {

            mUserId = userId;

        }



        /**

         * Returns the id of the user that sent this request.

         * @hide

         */

        @UserIdInt

        public int getUserId() {

            return mUserId;

        }



        /**

         * Sets whether to use the default text classifier to handle this request.

         * This will be ignored if it is not the system text classifier to handle this request.

         * Sets the information about the {@link SystemTextClassifier} that sent this request.

         *

         * @hide

         */

        void setUseDefaultTextClassifier(boolean useDefaultTextClassifier) {

            mUseDefaultTextClassifier = useDefaultTextClassifier;

        void setSystemTextClassifierMetadata(@Nullable SystemTextClassifierMetadata systemTcData) {

            mSystemTcMetadata = systemTcData;

        }



        /**

         * Returns whether to use the default text classifier to handle this request. This

         * will be ignored if it is not the system text classifier to handle this request.

         * Returns the information about the {@link SystemTextClassifier} that sent this request.

         *

         * @hide

         */

        public boolean getUseDefaultTextClassifier() {

            return mUseDefaultTextClassifier;

        @Nullable

        public SystemTextClassifierMetadata getSystemTextClassifierMetadata() {

            return mSystemTcMetadata;

        }



        /**

core/java/android/view/textclassifier/SelectionEvent.java

+21 −46
Original line number Diff line number Diff line
@@ -19,10 +19,8 @@ package android.view.textclassifier; 
import android.annotation.IntDef;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.UserIdInt;

import android.os.Parcel;

import android.os.Parcelable;

import android.os.UserHandle;

import android.view.textclassifier.TextClassifier.EntityType;

import android.view.textclassifier.TextClassifier.WidgetType;
@@ -129,7 +127,6 @@ public final class SelectionEvent implements Parcelable { 
    private String mWidgetType = TextClassifier.WIDGET_TYPE_UNKNOWN;

    private @InvocationMethod int mInvocationMethod;

    @Nullable private String mWidgetVersion;

    private @UserIdInt int mUserId = UserHandle.USER_NULL;

    @Nullable private String mResultId;

    private long mEventTime;

    private long mDurationSinceSessionStart;
@@ -140,7 +137,7 @@ public final class SelectionEvent implements Parcelable { 
    private int mEnd;

    private int mSmartStart;

    private int mSmartEnd;

    private boolean mUseDefaultTextClassifier;

    @Nullable private SystemTextClassifierMetadata mSystemTcMetadata;



    SelectionEvent(

            int start, int end,
@@ -161,6 +158,7 @@ public final class SelectionEvent implements Parcelable { 
        mEventType = in.readInt();

        mEntityType = in.readString();

        mWidgetVersion = in.readInt() > 0 ? in.readString() : null;

        // TODO: remove mPackageName once aiai does not need it

        mPackageName = in.readString();

        mWidgetType = in.readString();

        mInvocationMethod = in.readInt();
@@ -175,8 +173,7 @@ public final class SelectionEvent implements Parcelable { 
        mEnd = in.readInt();

        mSmartStart = in.readInt();

        mSmartEnd = in.readInt();

        mUserId = in.readInt();

        mUseDefaultTextClassifier = in.readBoolean();

        mSystemTcMetadata = in.readParcelable(null);

    }



    @Override
@@ -189,6 +186,7 @@ public final class SelectionEvent implements Parcelable { 
        if (mWidgetVersion != null) {

            dest.writeString(mWidgetVersion);

        }

        // TODO: remove mPackageName once aiai does not need it

        dest.writeString(mPackageName);

        dest.writeString(mWidgetType);

        dest.writeInt(mInvocationMethod);
@@ -205,8 +203,7 @@ public final class SelectionEvent implements Parcelable { 
        dest.writeInt(mEnd);

        dest.writeInt(mSmartStart);

        dest.writeInt(mSmartEnd);

        dest.writeInt(mUserId);

        dest.writeBoolean(mUseDefaultTextClassifier);

        dest.writeParcelable(mSystemTcMetadata, flags);

    }



    @Override
@@ -409,45 +406,26 @@ public final class SelectionEvent implements Parcelable { 
     */

    @NonNull

    public String getPackageName() {

        return mPackageName;

        return mSystemTcMetadata != null ? mSystemTcMetadata.getCallingPackageName() : "";

    }



    /**

     * Sets the id of this event's user.

     * <p>

     * Package-private for SystemTextClassifier's use.

     */

    void setUserId(@UserIdInt int userId) {

        mUserId = userId;

    }



    /**

     * Returns the id of this event's user.

     * @hide

     */

    @UserIdInt

    public int getUserId() {

        return mUserId;

    }



    /**

     * Sets whether to use the default text classifier to handle this request.

     * This will be ignored if it is not the system text classifier to handle this request.

     * Sets the information about the {@link SystemTextClassifier} that sent this request.

     *

     * @hide

     */

    void setUseDefaultTextClassifier(boolean useDefaultTextClassifier) {

        mUseDefaultTextClassifier = useDefaultTextClassifier;

    void setSystemTextClassifierMetadata(@Nullable SystemTextClassifierMetadata systemTcMetadata) {

        mSystemTcMetadata = systemTcMetadata;

    }



    /**

     * Returns whether to use the default text classifier to handle this request. This

     * will be ignored if it is not the system text classifier to handle this request.

     * Returns the information about the {@link SystemTextClassifier} that sent this request.

     *

     * @hide

     */

    public boolean getUseDefaultTextClassifier() {

        return mUseDefaultTextClassifier;

    @Nullable

    public SystemTextClassifierMetadata getSystemTextClassifierMetadata() {

        return mSystemTcMetadata;

    }



    /**
@@ -476,7 +454,7 @@ public final class SelectionEvent implements Parcelable { 
        mPackageName = context.getPackageName();

        mWidgetType = context.getWidgetType();

        mWidgetVersion = context.getWidgetVersion();

        mUserId = context.getUserId();

        mSystemTcMetadata = context.getSystemTextClassifierMetadata();

    }



    /**
@@ -663,10 +641,9 @@ public final class SelectionEvent implements Parcelable { 
    @Override

    public int hashCode() {

        return Objects.hash(mAbsoluteStart, mAbsoluteEnd, mEventType, mEntityType,

                mWidgetVersion, mPackageName, mUserId, mWidgetType, mInvocationMethod, mResultId,

                mWidgetVersion, mPackageName, mWidgetType, mInvocationMethod, mResultId,

                mEventTime, mDurationSinceSessionStart, mDurationSincePreviousEvent,

                mEventIndex, mSessionId, mStart, mEnd, mSmartStart, mSmartEnd,

                mUseDefaultTextClassifier);

                mEventIndex, mSessionId, mStart, mEnd, mSmartStart, mSmartEnd, mSystemTcMetadata);

    }



    @Override
@@ -685,7 +662,6 @@ public final class SelectionEvent implements Parcelable { 
                && Objects.equals(mEntityType, other.mEntityType)

                && Objects.equals(mWidgetVersion, other.mWidgetVersion)

                && Objects.equals(mPackageName, other.mPackageName)

                && mUserId == other.mUserId

                && Objects.equals(mWidgetType, other.mWidgetType)

                && mInvocationMethod == other.mInvocationMethod

                && Objects.equals(mResultId, other.mResultId)
@@ -698,7 +674,7 @@ public final class SelectionEvent implements Parcelable { 
                && mEnd == other.mEnd

                && mSmartStart == other.mSmartStart

                && mSmartEnd == other.mSmartEnd

                && mUseDefaultTextClassifier == other.mUseDefaultTextClassifier;

                && mSystemTcMetadata == other.mSystemTcMetadata;

    }



    @Override
@@ -706,15 +682,14 @@ public final class SelectionEvent implements Parcelable { 
        return String.format(Locale.US,

                "SelectionEvent {absoluteStart=%d, absoluteEnd=%d, eventType=%d, entityType=%s, "

                        + "widgetVersion=%s, packageName=%s, widgetType=%s, invocationMethod=%s, "

                        + "userId=%d, resultId=%s, eventTime=%d, durationSinceSessionStart=%d, "

                        + "resultId=%s, eventTime=%d, durationSinceSessionStart=%d, "

                        + "durationSincePreviousEvent=%d, eventIndex=%d,"

                        + "sessionId=%s, start=%d, end=%d, smartStart=%d, smartEnd=%d, "

                        + "mUseDefaultTextClassifier=%b}",

                        + "systemTcMetadata=%s}",

                mAbsoluteStart, mAbsoluteEnd, mEventType, mEntityType,

                mWidgetVersion, mPackageName, mWidgetType, mInvocationMethod,

                mUserId, mResultId, mEventTime, mDurationSinceSessionStart,

                mDurationSincePreviousEvent, mEventIndex,

                mSessionId, mStart, mEnd, mSmartStart, mSmartEnd, mUseDefaultTextClassifier);

                mResultId, mEventTime, mDurationSinceSessionStart, mDurationSincePreviousEvent,

                mEventIndex, mSessionId, mStart, mEnd, mSmartStart, mSmartEnd, mSystemTcMetadata);

    }



    public static final @android.annotation.NonNull Creator<SelectionEvent> CREATOR = new Creator<SelectionEvent>() {

core/java/android/view/textclassifier/SystemTextClassifier.java

+31 −38
Original line number Diff line number Diff line
@@ -18,7 +18,6 @@ package android.view.textclassifier; 


import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.UserIdInt;

import android.annotation.WorkerThread;

import android.content.Context;

import android.os.Bundle;
@@ -39,7 +38,8 @@ import java.util.concurrent.CountDownLatch; 
import java.util.concurrent.TimeUnit;



/**

 * Proxy to the system's default TextClassifier.

 * proxy to the request to TextClassifierService via the TextClassificationManagerService.

 *

 * @hide

 */

@VisibleForTesting(visibility = Visibility.PACKAGE)
@@ -50,14 +50,19 @@ public final class SystemTextClassifier implements TextClassifier { 
    private final ITextClassifierService mManagerService;

    private final TextClassificationConstants mSettings;

    private final TextClassifier mFallback;

    private final String mPackageName;

    // NOTE: Always set this before sending a request to the manager service otherwise the manager

    // service will throw a remote exception.

    @UserIdInt

    private final int mUserId;

    private final boolean mUseDefault;

    private TextClassificationSessionId mSessionId;

    // NOTE: Always set this before sending a request to the manager service otherwise the

    // manager service will throw a remote exception.

    @NonNull

    private final SystemTextClassifierMetadata mSystemTcMetadata;



    /**

     * Constructor of {@link SystemTextClassifier}

     *

     * @param context the context of the request.

     * @param settings TextClassifier specific settings.

     * @param useDefault whether to use the default text classifier to handle this request

     */

    public SystemTextClassifier(

            Context context,

            TextClassificationConstants settings,
@@ -66,9 +71,11 @@ public final class SystemTextClassifier implements TextClassifier { 
                ServiceManager.getServiceOrThrow(Context.TEXT_CLASSIFICATION_SERVICE));

        mSettings = Objects.requireNonNull(settings);

        mFallback = TextClassifier.NO_OP;

        mPackageName = Objects.requireNonNull(context.getOpPackageName());

        mUserId = context.getUserId();

        mUseDefault = useDefault;

        // NOTE: Always set this before sending a request to the manager service otherwise the

        // manager service will throw a remote exception.

        mSystemTcMetadata = new SystemTextClassifierMetadata(

                Objects.requireNonNull(context.getOpPackageName()), context.getUserId(),

                useDefault);

    }



    /**
@@ -80,9 +87,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        Objects.requireNonNull(request);

        Utils.checkMainThread();

        try {

            request.setCallingPackageName(mPackageName);

            request.setUserId(mUserId);

            request.setUseDefaultTextClassifier(mUseDefault);

            request.setSystemTextClassifierMetadata(mSystemTcMetadata);

            final BlockingCallback<TextSelection> callback =

                    new BlockingCallback<>("textselection");

            mManagerService.onSuggestSelection(mSessionId, request, callback);
@@ -105,9 +110,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        Objects.requireNonNull(request);

        Utils.checkMainThread();

        try {

            request.setCallingPackageName(mPackageName);

            request.setUserId(mUserId);

            request.setUseDefaultTextClassifier(mUseDefault);

            request.setSystemTextClassifierMetadata(mSystemTcMetadata);

            final BlockingCallback<TextClassification> callback =

                    new BlockingCallback<>("textclassification");

            mManagerService.onClassifyText(mSessionId, request, callback);
@@ -137,9 +140,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        }



        try {

            request.setCallingPackageName(mPackageName);

            request.setUserId(mUserId);

            request.setUseDefaultTextClassifier(mUseDefault);

            request.setSystemTextClassifierMetadata(mSystemTcMetadata);

            final BlockingCallback<TextLinks> callback =

                    new BlockingCallback<>("textlinks");

            mManagerService.onGenerateLinks(mSessionId, request, callback);
@@ -159,8 +160,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        Utils.checkMainThread();



        try {

            event.setUserId(mUserId);

            event.setUseDefaultTextClassifier(mUseDefault);

            event.setSystemTextClassifierMetadata(mSystemTcMetadata);

            mManagerService.onSelectionEvent(mSessionId, event);

        } catch (RemoteException e) {

            Log.e(LOG_TAG, "Error reporting selection event.", e);
@@ -173,12 +173,11 @@ public final class SystemTextClassifier implements TextClassifier { 
        Utils.checkMainThread();



        try {

            final TextClassificationContext tcContext = event.getEventContext() == null

                    ? new TextClassificationContext.Builder(mPackageName, WIDGET_TYPE_UNKNOWN)

                            .build()

            final TextClassificationContext tcContext =

                    event.getEventContext() == null ? new TextClassificationContext.Builder(

                            mSystemTcMetadata.getCallingPackageName(), WIDGET_TYPE_UNKNOWN).build()

                            : event.getEventContext();

            tcContext.setUserId(mUserId);

            tcContext.setUseDefaultTextClassifier(mUseDefault);

            tcContext.setSystemTextClassifierMetadata(mSystemTcMetadata);

            event.setEventContext(tcContext);

            mManagerService.onTextClassifierEvent(mSessionId, event);

        } catch (RemoteException e) {
@@ -192,9 +191,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        Utils.checkMainThread();



        try {

            request.setCallingPackageName(mPackageName);

            request.setUserId(mUserId);

            request.setUseDefaultTextClassifier(mUseDefault);

            request.setSystemTextClassifierMetadata(mSystemTcMetadata);

            final BlockingCallback<TextLanguage> callback =

                    new BlockingCallback<>("textlanguage");

            mManagerService.onDetectLanguage(mSessionId, request, callback);
@@ -214,9 +211,7 @@ public final class SystemTextClassifier implements TextClassifier { 
        Utils.checkMainThread();



        try {

            request.setCallingPackageName(mPackageName);

            request.setUserId(mUserId);

            request.setUseDefaultTextClassifier(mUseDefault);

            request.setSystemTextClassifierMetadata(mSystemTcMetadata);

            final BlockingCallback<ConversationActions> callback =

                    new BlockingCallback<>("conversation-actions");

            mManagerService.onSuggestConversationActions(mSessionId, request, callback);
@@ -256,10 +251,8 @@ public final class SystemTextClassifier implements TextClassifier { 
        printWriter.println("SystemTextClassifier:");

        printWriter.increaseIndent();

        printWriter.printPair("mFallback", mFallback);

        printWriter.printPair("mPackageName", mPackageName);

        printWriter.printPair("mSessionId", mSessionId);

        printWriter.printPair("mUserId", mUserId);

        printWriter.printPair("mUseDefault",  mUseDefault);

        printWriter.printPair("mSystemTcMetadata",  mSystemTcMetadata);

        printWriter.decreaseIndent();

        printWriter.println();

    }
@@ -275,7 +268,7 @@ public final class SystemTextClassifier implements TextClassifier { 
            @NonNull TextClassificationSessionId sessionId) {

        mSessionId = Objects.requireNonNull(sessionId);

        try {

            classificationContext.setUserId(mUserId);

            classificationContext.setSystemTextClassifierMetadata(mSystemTcMetadata);

            mManagerService.onCreateTextClassificationSession(classificationContext, mSessionId);

        } catch (RemoteException e) {

            Log.e(LOG_TAG, "Error starting a new classification session.", e);

core/java/android/view/textclassifier/SystemTextClassifierMetadata.aidl

0 → 100644
+19 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 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.view.textclassifier;



parcelable SystemTextClassifierMetadata;
 
 No newline at end of file

core/java/android/view/textclassifier/SystemTextClassifierMetadata.java

0 → 100644
+121 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 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.view.textclassifier;



import android.annotation.NonNull;

import android.annotation.UserIdInt;

import android.os.Parcel;

import android.os.Parcelable;



import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.annotations.VisibleForTesting.Visibility;



import java.util.Locale;

import java.util.Objects;



/**

 * SystemTextClassifier specific information.

 * <p>

 * This contains information requires for the TextClassificationManagerService to process the

 * requests from the application, e.g. user id, calling package name and etc. Centrialize the data

 * into this class helps to extend the scalability if we want to add new fields.

 * @hide

 */

@VisibleForTesting(visibility = Visibility.PACKAGE)

public final class SystemTextClassifierMetadata implements Parcelable {



    /* The name of the package that sent the TC request. */

    @NonNull

    private final String mCallingPackageName;

    /* The id of the user that sent the TC request. */

    @UserIdInt

    private final int mUserId;

    /* Whether to use the default text classifier to handle the request. */

    private final boolean mUseDefaultTextClassifier;



    public SystemTextClassifierMetadata(@NonNull String packageName, @UserIdInt int userId,

            boolean useDefaultTextClassifier) {

        Objects.requireNonNull(packageName);

        mCallingPackageName = packageName;

        mUserId = userId;

        mUseDefaultTextClassifier = useDefaultTextClassifier;

    }



    /**

     * Returns the id of the user that sent the TC request.

     */

    @UserIdInt

    public int getUserId() {

        return mUserId;

    }



    /**

     * Returns the name of the package that sent the TC request.

     * This returns {@code null} if no calling package name is set.

     */

    @NonNull

    public String getCallingPackageName() {

        return mCallingPackageName;

    }



    /**

     * Returns whether to use the default text classifier to handle TC request.

     */

    public boolean useDefaultTextClassifier() {

        return mUseDefaultTextClassifier;

    }



    @Override

    public String toString() {

        return String.format(Locale.US,

                "SystemTextClassifierMetadata {callingPackageName=%s, userId=%d, "

                        + "useDefaultTextClassifier=%b}",

                mCallingPackageName, mUserId, mUseDefaultTextClassifier);

    }



    private static SystemTextClassifierMetadata readFromParcel(Parcel in) {

        final String packageName = in.readString();

        final int userId = in.readInt();

        final boolean useDefaultTextClassifier = in.readBoolean();

        return new SystemTextClassifierMetadata(packageName, userId, useDefaultTextClassifier);

    }



    @Override

    public int describeContents() {

        return 0;

    }



    @Override

    public void writeToParcel(Parcel dest, int flags) {

        dest.writeString(mCallingPackageName);

        dest.writeInt(mUserId);

        dest.writeBoolean(mUseDefaultTextClassifier);

    }



    public static final @NonNull Creator<SystemTextClassifierMetadata> CREATOR =

            new Creator<SystemTextClassifierMetadata>() {

        @Override

        public SystemTextClassifierMetadata createFromParcel(Parcel in) {

            return readFromParcel(in);

        }



        @Override

        public SystemTextClassifierMetadata[] newArray(int size) {

            return new SystemTextClassifierMetadata[size];

        }

    };

}