67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SCOPED_JAVA_UNICODE_STRING_H_included
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#define SCOPED_JAVA_UNICODE_STRING_H_included
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#include <nativehelper/JNIHelp.h>
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#include "unicode/unistr.h"
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// A smart pointer that provides access to an ICU UnicodeString given a JNI
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// jstring. We give ICU a direct pointer to the characters on the Java heap.
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// It's clever enough to copy-on-write if necessary.
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class ScopedJavaUnicodeString {
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public:
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ScopedJavaUnicodeString(JNIEnv* env, jstring s) : mEnv(env), mString(s) {
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if (s == NULL) {
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jniThrowNullPointerException(mEnv, NULL);
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} else {
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mChars = env->GetStringChars(mString, NULL);
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const int32_t charCount = env->GetStringLength(mString);
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mUnicodeString.setTo(false, mChars, charCount);
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}
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}
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~ScopedJavaUnicodeString() {
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if (mString != NULL) {
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mEnv->ReleaseStringChars(mString, mChars);
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}
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}
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bool valid() const {
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return (mString != NULL);
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}
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const icu::UnicodeString& unicodeString() const {
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return mUnicodeString;
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}
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icu::UnicodeString& unicodeString() {
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return mUnicodeString;
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}
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private:
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JNIEnv* mEnv;
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jstring mString;
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const jchar* mChars;
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icu::UnicodeString mUnicodeString;
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// Disallow copy and assignment.
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ScopedJavaUnicodeString(const ScopedJavaUnicodeString&);
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void operator=(const ScopedJavaUnicodeString&);
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};
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#endif // SCOPED_JAVA_UNICODE_STRING_H_included
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