| /* |
| * 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; |
| |
| /** |
| * Java wrapper for SmartSelection native library interface. |
| * This library is used for detecting entities in text. |
| */ |
| final class SmartSelection { |
| |
| static { |
| System.loadLibrary("textclassifier"); |
| } |
| |
| /** Hints the classifier that this may be a url. */ |
| static final int HINT_FLAG_URL = 0x01; |
| /** Hints the classifier that this may be an email. */ |
| static final int HINT_FLAG_EMAIL = 0x02; |
| |
| private final long mCtx; |
| |
| /** |
| * Creates a new instance of SmartSelect predictor, using the provided model image, |
| * given as a file descriptor. |
| */ |
| SmartSelection(int fd) { |
| mCtx = nativeNew(fd); |
| } |
| |
| /** |
| * Given a string context and current selection, computes the SmartSelection suggestion. |
| * |
| * The begin and end are character indices into the context UTF8 string. selectionBegin is the |
| * character index where the selection begins, and selectionEnd is the index of one character |
| * past the selection span. |
| * |
| * The return value is an array of two ints: suggested selection beginning and end, with the |
| * same semantics as the input selectionBeginning and selectionEnd. |
| */ |
| public int[] suggest(String context, int selectionBegin, int selectionEnd) { |
| return nativeSuggest(mCtx, context, selectionBegin, selectionEnd); |
| } |
| |
| /** |
| * Given a string context and current selection, classifies the type of the selected text. |
| * |
| * The begin and end params are character indices in the context string. |
| * |
| * Returns an array of ClassificationResult objects with the probability |
| * scores for different collections. |
| */ |
| public ClassificationResult[] classifyText( |
| String context, int selectionBegin, int selectionEnd, int hintFlags) { |
| return nativeClassifyText(mCtx, context, selectionBegin, selectionEnd, hintFlags); |
| } |
| |
| /** |
| * Frees up the allocated memory. |
| */ |
| public void close() { |
| nativeClose(mCtx); |
| } |
| |
| private static native long nativeNew(int fd); |
| |
| private static native int[] nativeSuggest( |
| long context, String text, int selectionBegin, int selectionEnd); |
| |
| private static native ClassificationResult[] nativeClassifyText( |
| long context, String text, int selectionBegin, int selectionEnd, int hintFlags); |
| |
| private static native void nativeClose(long context); |
| |
| /** Classification result for classifyText method. */ |
| static final class ClassificationResult { |
| final String mCollection; |
| /** float range: 0 - 1 */ |
| final float mScore; |
| |
| ClassificationResult(String collection, float score) { |
| mCollection = collection; |
| mScore = score; |
| } |
| } |
| } |