| /* |
| * Copyright (C) 2017 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.FloatRange; |
| import android.annotation.IntRange; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.LocaleList; |
| import android.util.ArrayMap; |
| import android.view.textclassifier.TextClassifier.EntityType; |
| |
| import com.android.internal.util.Preconditions; |
| |
| import java.util.Locale; |
| import java.util.Map; |
| |
| /** |
| * Information about where text selection should be. |
| */ |
| public final class TextSelection { |
| |
| private final int mStartIndex; |
| private final int mEndIndex; |
| @NonNull private final EntityConfidence<String> mEntityConfidence; |
| @NonNull private final String mLogSource; |
| @NonNull private final String mVersionInfo; |
| |
| private TextSelection( |
| int startIndex, int endIndex, @NonNull EntityConfidence<String> entityConfidence, |
| @NonNull String logSource, @NonNull String versionInfo) { |
| mStartIndex = startIndex; |
| mEndIndex = endIndex; |
| mEntityConfidence = new EntityConfidence<>(entityConfidence); |
| mLogSource = logSource; |
| mVersionInfo = versionInfo; |
| } |
| |
| /** |
| * Returns the start index of the text selection. |
| */ |
| public int getSelectionStartIndex() { |
| return mStartIndex; |
| } |
| |
| /** |
| * Returns the end index of the text selection. |
| */ |
| public int getSelectionEndIndex() { |
| return mEndIndex; |
| } |
| |
| /** |
| * Returns the number of entities found in the classified text. |
| */ |
| @IntRange(from = 0) |
| public int getEntityCount() { |
| return mEntityConfidence.getEntities().size(); |
| } |
| |
| /** |
| * Returns the entity at the specified index. Entities are ordered from high confidence |
| * to low confidence. |
| * |
| * @throws IndexOutOfBoundsException if the specified index is out of range. |
| * @see #getEntityCount() for the number of entities available. |
| */ |
| @NonNull |
| public @EntityType String getEntity(int index) { |
| return mEntityConfidence.getEntities().get(index); |
| } |
| |
| /** |
| * Returns the confidence score for the specified entity. The value ranges from |
| * 0 (low confidence) to 1 (high confidence). 0 indicates that the entity was not found for the |
| * classified text. |
| */ |
| @FloatRange(from = 0.0, to = 1.0) |
| public float getConfidenceScore(@EntityType String entity) { |
| return mEntityConfidence.getConfidenceScore(entity); |
| } |
| |
| /** |
| * Returns a tag for the source classifier used to generate this result. |
| * @hide |
| */ |
| @NonNull |
| public String getSourceClassifier() { |
| return mLogSource; |
| } |
| |
| /** |
| * Returns information about the classifier model used to generate this TextSelection. |
| * @hide |
| */ |
| @NonNull |
| public String getVersionInfo() { |
| return mVersionInfo; |
| } |
| |
| @Override |
| public String toString() { |
| return String.format(Locale.US, |
| "TextSelection {%d, %d, %s}", mStartIndex, mEndIndex, mEntityConfidence); |
| } |
| |
| /** |
| * Builder used to build {@link TextSelection} objects. |
| */ |
| public static final class Builder { |
| |
| private final int mStartIndex; |
| private final int mEndIndex; |
| @NonNull private final Map<String, Float> mEntityConfidence = new ArrayMap<>(); |
| @NonNull private String mLogSource = ""; |
| @NonNull private String mVersionInfo = ""; |
| |
| /** |
| * Creates a builder used to build {@link TextSelection} objects. |
| * |
| * @param startIndex the start index of the text selection. |
| * @param endIndex the end index of the text selection. Must be greater than startIndex |
| */ |
| public Builder(@IntRange(from = 0) int startIndex, @IntRange(from = 0) int endIndex) { |
| Preconditions.checkArgument(startIndex >= 0); |
| Preconditions.checkArgument(endIndex > startIndex); |
| mStartIndex = startIndex; |
| mEndIndex = endIndex; |
| } |
| |
| /** |
| * Sets an entity type for the classified text and assigns a confidence score. |
| * |
| * @param confidenceScore a value from 0 (low confidence) to 1 (high confidence). |
| * 0 implies the entity does not exist for the classified text. |
| * Values greater than 1 are clamped to 1. |
| */ |
| public Builder setEntityType( |
| @NonNull @EntityType String type, |
| @FloatRange(from = 0.0, to = 1.0) float confidenceScore) { |
| mEntityConfidence.put(type, confidenceScore); |
| return this; |
| } |
| |
| /** |
| * Sets a tag for the source classifier used to generate this result. |
| * @hide |
| */ |
| Builder setLogSource(@NonNull String logSource) { |
| mLogSource = Preconditions.checkNotNull(logSource); |
| return this; |
| } |
| |
| /** |
| * Sets information about the classifier model used to generate this TextSelection. |
| * @hide |
| */ |
| Builder setVersionInfo(@NonNull String versionInfo) { |
| mVersionInfo = Preconditions.checkNotNull(versionInfo); |
| return this; |
| } |
| |
| /** |
| * Builds and returns {@link TextSelection} object. |
| */ |
| public TextSelection build() { |
| return new TextSelection( |
| mStartIndex, mEndIndex, new EntityConfidence<>(mEntityConfidence), mLogSource, |
| mVersionInfo); |
| } |
| } |
| |
| /** |
| * Optional input parameters for generating TextSelection. |
| */ |
| public static final class Options { |
| |
| private LocaleList mDefaultLocales; |
| private boolean mDarkLaunchAllowed; |
| |
| /** |
| * @param defaultLocales ordered list of locale preferences that may be used to disambiguate |
| * the provided text. If no locale preferences exist, set this to null or an empty |
| * locale list. |
| */ |
| public Options setDefaultLocales(@Nullable LocaleList defaultLocales) { |
| mDefaultLocales = defaultLocales; |
| return this; |
| } |
| |
| /** |
| * @return ordered list of locale preferences that can be used to disambiguate |
| * the provided text. |
| */ |
| @Nullable |
| public LocaleList getDefaultLocales() { |
| return mDefaultLocales; |
| } |
| |
| /** |
| * @param allowed whether or not the TextClassifier should return selection suggestions |
| * when "dark launched". When a TextClassifier is dark launched, it can suggest |
| * selection changes that should not be used to actually change the user's selection. |
| * Instead, the suggested selection is logged, compared with the user's selection |
| * interaction, and used to generate quality metrics for the TextClassifier. |
| * |
| * @hide |
| */ |
| public void setDarkLaunchAllowed(boolean allowed) { |
| mDarkLaunchAllowed = allowed; |
| } |
| |
| /** |
| * Returns true if the TextClassifier should return selection suggestions when |
| * "dark launched". Otherwise, returns false. |
| * |
| * @hide |
| */ |
| public boolean isDarkLaunchAllowed() { |
| return mDarkLaunchAllowed; |
| } |
| } |
| } |