2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef SCOPED_JAVA_UNICODE_STRING_H_included
18 #define SCOPED_JAVA_UNICODE_STRING_H_included
21 #include "unicode/unistr.h"
23 // A smart pointer that provides access to an ICU UnicodeString given a JNI
24 // jstring. We give ICU a direct pointer to the characters on the Java heap.
25 // It's clever enough to copy-on-write if necessary.
26 class ScopedJavaUnicodeString {
28 ScopedJavaUnicodeString(JNIEnv* env, jstring s) : mEnv(env), mString(s) {
29 mChars = env->GetStringChars(mString, NULL);
30 const int32_t charCount = env->GetStringLength(mString);
31 mUnicodeString.setTo(false, mChars, charCount);
34 ~ScopedJavaUnicodeString() {
35 mEnv->ReleaseStringChars(mString, mChars);
38 const UnicodeString& unicodeString() const {
39 return mUnicodeString;
42 UnicodeString& unicodeString() {
43 return mUnicodeString;
50 UnicodeString mUnicodeString;
52 // Disallow copy and assignment.
53 ScopedJavaUnicodeString(const ScopedJavaUnicodeString&);
54 void operator=(const ScopedJavaUnicodeString&);
57 #endif // SCOPED_JAVA_UNICODE_STRING_H_included