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      1 /*
      2  * Copyright (C) 2003, 2004, 2005, 2007, 2009 Apple Inc. All rights reserved.
      3  * Copyright 2010, The Android Open Source Project
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "JavaMethodJobject.h"
     29 
     30 #if ENABLE(JAVA_BRIDGE)
     31 
     32 #include "JavaString.h"
     33 
     34 #if USE(JSC)
     35 #include <runtime/JSObject.h>
     36 #include <runtime/ScopeChain.h>
     37 #endif
     38 #include <wtf/text/StringBuilder.h>
     39 
     40 using namespace JSC;
     41 using namespace JSC::Bindings;
     42 
     43 JavaMethodJobject::JavaMethodJobject(JNIEnv* env, jobject aMethod)
     44 {
     45     // Get return type name
     46     jstring returnTypeName = 0;
     47     if (jobject returnType = callJNIMethod<jobject>(aMethod, "getReturnType", "()Ljava/lang/Class;")) {
     48         returnTypeName = static_cast<jstring>(callJNIMethod<jobject>(returnType, "getName", "()Ljava/lang/String;"));
     49         if (!returnTypeName)
     50             returnTypeName = env->NewStringUTF("<Unknown>");
     51         env->DeleteLocalRef(returnType);
     52     }
     53     m_returnTypeClassName = JavaString(env, returnTypeName);
     54     m_returnType = javaTypeFromClassName(m_returnTypeClassName.utf8());
     55     env->DeleteLocalRef(returnTypeName);
     56 
     57     // Get method name
     58     jstring methodName = static_cast<jstring>(callJNIMethod<jobject>(aMethod, "getName", "()Ljava/lang/String;"));
     59     if (!methodName)
     60         methodName = env->NewStringUTF("<Unknown>");
     61     m_name = JavaString(env, methodName);
     62     env->DeleteLocalRef(methodName);
     63 
     64     // Get parameters
     65     if (jarray jparameters = static_cast<jarray>(callJNIMethod<jobject>(aMethod, "getParameterTypes", "()[Ljava/lang/Class;"))) {
     66         unsigned int numParams = env->GetArrayLength(jparameters);
     67 
     68         for (unsigned int i = 0; i < numParams; i++) {
     69             jobject aParameter = env->GetObjectArrayElement(static_cast<jobjectArray>(jparameters), i);
     70             jstring parameterName = static_cast<jstring>(callJNIMethod<jobject>(aParameter, "getName", "()Ljava/lang/String;"));
     71             if (!parameterName)
     72                 parameterName = env->NewStringUTF("<Unknown>");
     73             m_parameters.append(JavaString(env, parameterName).impl());
     74             env->DeleteLocalRef(aParameter);
     75             env->DeleteLocalRef(parameterName);
     76         }
     77         env->DeleteLocalRef(jparameters);
     78     }
     79 
     80     // Created lazily.
     81     m_signature = 0;
     82 
     83     jclass modifierClass = env->FindClass("java/lang/reflect/Modifier");
     84     int modifiers = callJNIMethod<jint>(aMethod, "getModifiers", "()I");
     85     m_isStatic = static_cast<bool>(callJNIStaticMethod<jboolean>(modifierClass, "isStatic", "(I)Z", modifiers));
     86     env->DeleteLocalRef(modifierClass);
     87 }
     88 
     89 JavaMethodJobject::~JavaMethodJobject()
     90 {
     91     if (m_signature)
     92         fastFree(m_signature);
     93 }
     94 
     95 // JNI method signatures use '/' between components of a class name, but
     96 // we get '.' between components from the reflection API.
     97 static void appendClassName(StringBuilder& builder, const char* className)
     98 {
     99 #if USE(JSC)
    100     ASSERT(JSLock::lockCount() > 0);
    101 #endif
    102 
    103     char* c = fastStrDup(className);
    104 
    105     char* result = c;
    106     while (*c) {
    107         if (*c == '.')
    108             *c = '/';
    109         c++;
    110     }
    111 
    112     builder.append(result);
    113 
    114     fastFree(result);
    115 }
    116 
    117 const char* JavaMethodJobject::signature() const
    118 {
    119     if (!m_signature) {
    120 #if USE(JSC)
    121         JSLock lock(SilenceAssertionsOnly);
    122 #endif
    123 
    124         StringBuilder signatureBuilder;
    125         signatureBuilder.append('(');
    126         for (unsigned int i = 0; i < m_parameters.size(); i++) {
    127             CString javaClassName = parameterAt(i).utf8();
    128             JavaType type = javaTypeFromClassName(javaClassName.data());
    129             if (type == JavaTypeArray)
    130                 appendClassName(signatureBuilder, javaClassName.data());
    131             else {
    132                 signatureBuilder.append(signatureFromJavaType(type));
    133                 if (type == JavaTypeObject
    134 // ANDROID
    135                     || type == JavaTypeString
    136 // ANDROID
    137                     ) {
    138                     appendClassName(signatureBuilder, javaClassName.data());
    139                     signatureBuilder.append(';');
    140                 }
    141             }
    142         }
    143         signatureBuilder.append(')');
    144 
    145         const char* returnType = m_returnTypeClassName.utf8();
    146         if (m_returnType == JavaTypeArray)
    147             appendClassName(signatureBuilder, returnType);
    148         else {
    149             signatureBuilder.append(signatureFromJavaType(m_returnType));
    150             if (m_returnType == JavaTypeObject
    151 // ANDROID
    152                 || m_returnType == JavaTypeString
    153 // ANDROID
    154                 ) {
    155                 appendClassName(signatureBuilder, returnType);
    156                 signatureBuilder.append(';');
    157             }
    158         }
    159 
    160         String signatureString = signatureBuilder.toString();
    161         m_signature = fastStrDup(signatureString.utf8().data());
    162     }
    163 
    164     return m_signature;
    165 }
    166 
    167 #endif // ENABLE(JAVA_BRIDGE)
    168