1/*
2 * Copyright 2009, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "MyJavaVM.h"
28
29#include <JNIUtility.h>
30#include <jni.h>
31
32static JNIEnv* s_env;
33static JavaVM* s_jvm;
34
35// JavaVM functions
36jint vm_attachCurrentThread(JavaVM*, JNIEnv** env, void*) {
37    *env = s_env;
38    return JNI_OK;
39}
40
41// JNIEnv functions
42jobject env_callObjectMethodV(JNIEnv*, jobject, jmethodID, va_list) {
43    return MY_JOBJECT;
44}
45void env_callVoidMethodV(JNIEnv*, jobject, jmethodID, va_list) {}
46void env_deleteRef(JNIEnv*, jobject) {}
47jboolean env_exceptionCheck(JNIEnv*) {
48    return false;
49}
50jclass env_findClass(JNIEnv*, const char*) {
51    return (jclass) 1;
52}
53jbyte* env_getByteArrayElements(JNIEnv*, jbyteArray, jboolean*) {
54    return NULL;
55}
56jmethodID env_getMethodID(JNIEnv*, jclass, const char*, const char*) {
57    return (jmethodID) 1;
58}
59jclass env_getObjectClass(JNIEnv*, jobject) {
60    return (jclass) 1;
61}
62static const char* s_fakeString = "Fake Java String";
63const jchar* env_getStringChars(JNIEnv*, jstring, jboolean* isCopy) {
64    if (isCopy)
65        *isCopy = false;
66    return (const jchar*)s_fakeString;
67}
68jsize env_getStringLength(JNIEnv*, jstring) {
69    return sizeof(s_fakeString) - 1;
70}
71jbyteArray env_newByteArray(JNIEnv*, jsize) {
72    return (jbyteArray) 1;
73}
74jobject env_newRef(JNIEnv*, jobject obj) {
75    return obj;
76}
77jobject env_newObjectV(JNIEnv*, jclass, jmethodID, va_list) {
78    return MY_JOBJECT;
79}
80jstring env_newString(JNIEnv*, const jchar*, jsize) {
81    return (jstring) 1;
82}
83void env_releaseByteArrayElements(JNIEnv*, jbyteArray, jbyte*, jint) {}
84void env_releaseStringChars(JNIEnv*, jstring, const jchar*) {}
85void env_setByteArrayRegion(JNIEnv*, jbyteArray, jsize, jsize, const jbyte*) {}
86void env_setIntField(JNIEnv*, jobject, jfieldID, jint) {}
87
88void InitializeJavaVM() {
89    // First, create the fake vm
90    s_jvm = new JavaVM;
91    JNIInvokeInterface* i = new JNIInvokeInterface;
92    memset(i, 0, sizeof(JNIInvokeInterface));
93    s_jvm->functions = i;
94
95    // Now, assign the functions of the vm to our fake ones.
96    i->AttachCurrentThread      = vm_attachCurrentThread;
97
98    // Create the fake env next
99    s_env = new JNIEnv;
100    JNINativeInterface* n = new JNINativeInterface;
101    memset(n, 0, sizeof(JNINativeInterface));
102    s_env->functions = n;
103
104    // Point the functions we care about to out fake ones.
105    n->CallObjectMethodV        = env_callObjectMethodV;
106    n->CallVoidMethodV          = env_callVoidMethodV;
107    n->DeleteLocalRef           = env_deleteRef;
108    n->DeleteGlobalRef          = env_deleteRef;
109    n->DeleteWeakGlobalRef      = env_deleteRef;
110    n->ExceptionCheck           = env_exceptionCheck;
111    n->FindClass                = env_findClass;
112    n->GetByteArrayElements     = env_getByteArrayElements;
113    n->GetMethodID              = env_getMethodID;
114    n->GetObjectClass           = env_getObjectClass;
115    n->GetStringChars           = env_getStringChars;
116    n->GetStringLength          = env_getStringLength;
117    n->NewByteArray             = env_newByteArray;
118    n->NewLocalRef              = env_newRef;
119    n->NewGlobalRef             = env_newRef;
120    n->NewWeakGlobalRef         = env_newRef;
121    n->NewObjectV               = env_newObjectV;
122    n->NewString                = env_newString;
123    n->ReleaseByteArrayElements = env_releaseByteArrayElements;
124    n->ReleaseStringChars       = env_releaseStringChars;
125    n->SetByteArrayRegion       = env_setByteArrayRegion;
126    n->SetIntField              = env_setIntField;
127
128    // Tell WebCore about the vm
129    JSC::Bindings::setJavaVM(s_jvm);
130}
131