bindings/jni/jni_runtime.h

   1 /*
   2  * Copyright (C) 2003 Apple Computer, Inc.  All rights reserved.
   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  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. 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 APPLE COMPUTER, INC. ``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 #ifndef _JNI_RUNTIME_H_
  27 #define _JNI_RUNTIME_H_
  28
  29 #if ENABLE(JAVA_BINDINGS)
  30
  31 #include <jni_utility.h>
  32 #include <jni_instance.h>
  33
  34
  35 namespace KJS
  36 {
  37
  38 namespace Bindings
  39 {
  40
  41 typedef const char* RuntimeType;
  42
  43 class JavaString
  44 {
  45 public:
  46     JavaString()
  47     {
  48         JSLock lock;
  49         _rep = UString().rep();
  50     }
  51
  52     void _commonInit (JNIEnv *e, jstring s)
  53     {
  54         int _size = e->GetStringLength (s);
  55         const jchar *uc = getUCharactersFromJStringInEnv (e, s);
  56         {
  57             JSLock lock;
  58             _rep = UString((UChar *)uc,_size).rep();
  59         }
  60         releaseUCharactersForJStringInEnv (e, s, uc);
  61     }
  62
  63     JavaString (JNIEnv *e, jstring s) {
  64         _commonInit (e, s);
  65     }
  66
  67     JavaString (jstring s) {
  68         _commonInit (getJNIEnv(), s);
  69     }
  70
  71     ~JavaString()
  72     {
  73         JSLock lock;
  74         _rep = 0;
  75     }
  76
  77     const char *UTF8String() const {
  78         if (_utf8String.c_str() == 0) {
  79             JSLock lock;
  80             _utf8String = UString(_rep).UTF8String();
  81         }
  82         return _utf8String.c_str();
  83     }
  84     const jchar *uchars() const { return (const jchar *)_rep->data(); }
  85     int length() const { return _rep->size(); }
  86     UString ustring() const { return UString(_rep); }
  87
  88 private:
  89     RefPtr<UString::Rep> _rep;
  90     mutable CString _utf8String;
  91 };
  92
  93 class JavaParameter
  94 {
  95 public:
  96     JavaParameter () : _JNIType(invalid_type) {};
  97     JavaParameter (JNIEnv *env, jstring type);
  98     virtual ~JavaParameter() { }
  99
 100     RuntimeType type() const { return _type.UTF8String(); }
 101     JNIType getJNIType() const { return _JNIType; }
 102
 103 private:
 104     JavaString _type;
 105     JNIType _JNIType;
 106 };
 107
 108
 109 class JavaField : public Field
 110 {
 111 public:
 112     JavaField (JNIEnv *env, jobject aField);
 113
 114     virtual JSValue *valueFromInstance(ExecState *exec, const Instance *instance) const;
 115     virtual void setValueToInstance(ExecState *exec, const Instance *instance, JSValue *aValue) const;
 116
 117     virtual const char *name() const { return _name.UTF8String(); }
 118     virtual RuntimeType type() const { return _type.UTF8String(); }
 119
 120     JNIType getJNIType() const { return _JNIType; }
 121
 122 private:
 123     void dispatchSetValueToInstance(ExecState *exec, const JavaInstance *instance, jvalue javaValue, const char *name, const char *sig) const;
 124     jvalue dispatchValueFromInstance(ExecState *exec, const JavaInstance *instance, const char *name, const char *sig, JNIType returnType) const;
 125
 126     JavaString _name;
 127     JavaString _type;
 128     JNIType _JNIType;
 129     RefPtr<JObjectWrapper> _field;
 130 };
 131
 132
 133 class JavaMethod : public Method
 134 {
 135 public:
 136     JavaMethod(JNIEnv* env, jobject aMethod);
 137     ~JavaMethod();
 138
 139     virtual const char *name() const { return _name.UTF8String(); };
 140     RuntimeType returnType() const { return _returnType.UTF8String(); };
 141     JavaParameter* parameterAt(int i) const { return &_parameters[i]; };
 142     int numParameters() const { return _numParameters; };
 143
 144     const char *signature() const;
 145     JNIType JNIReturnType() const;
 146
 147     jmethodID methodID (jobject obj) const;
 148
 149     bool isStatic() const { return _isStatic; }
 150
 151 private:
 152     JavaParameter* _parameters;
 153     int _numParameters;
 154     JavaString _name;
 155     mutable char* _signature;
 156     JavaString _returnType;
 157     JNIType _JNIReturnType;
 158     mutable jmethodID _methodID;
 159     bool _isStatic;
 160 };
 161
 162 class JavaArray : public Array
 163 {
 164 public:
 165     JavaArray(jobject array, const char* type, PassRefPtr<RootObject>);
 166     virtual ~JavaArray();
 167
 168     RootObject* rootObject() const;
 169
 170     virtual void setValueAt(ExecState *exec, unsigned int index, JSValue *aValue) const;
 171     virtual JSValue *valueAt(ExecState *exec, unsigned int index) const;
 172     virtual unsigned int getLength() const;
 173
 174     jobject javaArray() const { return _array->_instance; }
 175
 176     static JSValue* convertJObjectToArray (ExecState* exec, jobject anObject, const char* type, PassRefPtr<RootObject>);
 177
 178 private:
 179     RefPtr<JObjectWrapper> _array;
 180     unsigned int _length;
 181     const char *_type;
 182 };
 183
 184 } // namespace Bindings
 185
 186 } // namespace KJS
 187
 188 #endif // ENABLE(JAVA_BINDINGS)
 189
 190 #endif // _JNI_RUNTIME_H_