java_util_regex_Pattern.cpp revision bef9ec33e1368f57c731fce63b6a8c61628c64b0 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
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
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17#define LOG_TAG "Pattern"
18
19#include <stdlib.h>
20
21#include "JNIHelp.h"
22#include "JniConstants.h"
23#include "ScopedJavaUnicodeString.h"
24#include "jni.h"
25#include "unicode/parseerr.h"
26#include "unicode/regex.h"
27
28// ICU documentation: http://icu-project.org/apiref/icu4c/classRegexPattern.html
29
30static RegexPattern* toRegexPattern(jint addr) {
31    return reinterpret_cast<RegexPattern*>(static_cast<uintptr_t>(addr));
32}
33
34static void throwPatternSyntaxException(JNIEnv* env, UErrorCode status, jstring pattern, UParseError error) {
35    static jmethodID method = env->GetMethodID(JniConstants::patternSyntaxExceptionClass,
36            "<init>", "(Ljava/lang/String;Ljava/lang/String;I)V");
37    jstring message = env->NewStringUTF(u_errorName(status));
38    jclass exceptionClass = JniConstants::patternSyntaxExceptionClass;
39    jobject exception = env->NewObject(exceptionClass, method, message, pattern, error.offset);
40    env->Throw(reinterpret_cast<jthrowable>(exception));
41}
42
43static void Pattern_closeImpl(JNIEnv*, jclass, jint addr) {
44    delete toRegexPattern(addr);
45}
46
47static jint Pattern_compileImpl(JNIEnv* env, jclass, jstring javaRegex, jint flags) {
48    flags |= UREGEX_ERROR_ON_UNKNOWN_ESCAPES;
49
50    UErrorCode status = U_ZERO_ERROR;
51    UParseError error;
52    error.offset = -1;
53
54    ScopedJavaUnicodeString regex(env, javaRegex);
55    UnicodeString& regexString(regex.unicodeString());
56    RegexPattern* result = RegexPattern::compile(regexString, flags, error, status);
57    if (!U_SUCCESS(status)) {
58        throwPatternSyntaxException(env, status, javaRegex, error);
59    }
60    return static_cast<jint>(reinterpret_cast<uintptr_t>(result));
61}
62
63static JNINativeMethod gMethods[] = {
64    NATIVE_METHOD(Pattern, closeImpl, "(I)V"),
65    NATIVE_METHOD(Pattern, compileImpl, "(Ljava/lang/String;I)I"),
66};
67int register_java_util_regex_Pattern(JNIEnv* env) {
68    return jniRegisterNativeMethods(env, "java/util/regex/Pattern", gMethods, NELEM(gMethods));
69}
70