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annotate libinterp/octave-value/ov-java.h @ 15767:e665645fb402

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only register java type if using java * ov.cc: Only include ov-java.h if HAVE_JAVA. (install_types): Only call octave_java::register_type if HAVE_JAVA. From Andreas Weber <andreas.weber@hs-offenburg.de>.
author John W. Eaton <jwe@octave.org>
date Wed, 12 Dec 2012 08:38:22 -0500
parents f96faf028d90
children e61405133a76
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 2007 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if !defined (octave_java_h)
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24 #define octave_java_h 1
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25
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26 #include <jni.h>
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27
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28 #include <oct-obj.h>
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29 #include <ov.h>
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30
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31 #ifdef JAVAPKG_BUILD
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32 # define JAVAPKG_API OCTAVE_EXPORT
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33 #else
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34 # define JAVAPKG_API OCTAVE_IMPORT
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35 #endif
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36
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37 template <class T>
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38 class java_local_ref
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39 {
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40 public:
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41
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42 java_local_ref (JNIEnv *_env)
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43 : jobj (0), detached (false), env (_env) { }
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44
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45 java_local_ref (JNIEnv *_env, T obj)
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46 : jobj (obj), detached (false), env (_env) { }
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47
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48 ~java_local_ref (void) { release (); }
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49
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50 T& operator= (T obj)
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51 {
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52 release ();
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53 jobj = obj;
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54 detached = false;
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55 return jobj;
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56 }
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57
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58 operator bool () const { return (jobj != 0); }
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59 operator T () { return jobj; }
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60
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61 void detach (void) { detached = true; }
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62
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63 private:
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64
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65 void release (void)
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66 {
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67 if (env && jobj && ! detached)
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68 env->DeleteLocalRef (jobj);
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69
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70 jobj = 0;
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71 }
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72
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73 java_local_ref (void)
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74 : jobj (0), detached (false), env (0)
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75 { }
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76
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77 protected:
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78 T jobj;
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79 bool detached;
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80 JNIEnv *env;
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81 };
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82
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83 typedef java_local_ref<jobject> jobject_ref;
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84 typedef java_local_ref<jclass> jclass_ref;
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85 typedef java_local_ref<jstring> jstring_ref;
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86 typedef java_local_ref<jobjectArray> jobjectArray_ref;
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87 typedef java_local_ref<jintArray> jintArray_ref;
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88 typedef java_local_ref<jbyteArray> jbyteArray_ref;
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89 typedef java_local_ref<jdoubleArray> jdoubleArray_ref;
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90 typedef java_local_ref<jthrowable> jthrowable_ref;
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91
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92 extern JAVAPKG_API std::string
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93 jstring_to_string (JNIEnv* jni_env, jstring s);
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94
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95 extern JAVAPKG_API std::string
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96 jstring_to_string (JNIEnv* jni_env, jobject obj);
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97
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98 extern JAVAPKG_API octave_value
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99 box (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
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100
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101 extern JAVAPKG_API octave_value
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102 box_more (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
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103
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104 extern JAVAPKG_API int
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105 unbox (JNIEnv* jni_env, const octave_value& val, jobject_ref& jobj,
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106 jclass_ref& jcls);
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107
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108 extern JAVAPKG_API int
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109 unbox (JNIEnv* jni_env, const octave_value_list& args,
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110 jobjectArray_ref& jobjs, jobjectArray_ref& jclss);
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111
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112 extern JAVAPKG_API bool Vjava_convert_matrix;
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113
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114 extern JAVAPKG_API bool Vjava_unsigned_conversion;
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115
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116 extern JAVAPKG_API bool Vjava_debug;
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117
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118 class JAVAPKG_API octave_java : public octave_base_value
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119 {
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120 public:
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121
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122 octave_java (void)
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123 : octave_base_value (), java_object (0), java_class (0)
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124 { }
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125
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126 octave_java (const octave_java& jobj)
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127 : octave_base_value (jobj), java_object (0), java_class (0)
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128 {
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129 init (jobj.java_object, jobj.java_class);
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130 }
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131
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132 octave_java (const jobject& obj, jclass cls = 0)
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133 : octave_base_value (), java_object (0)
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134 {
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135 init (obj, cls);
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136 }
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137
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138 ~octave_java (void) { release (); }
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139
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140 jobject to_java (void) const { return java_object; }
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141 jclass to_class (void) const { return java_class; }
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142
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143 std::string java_class_name (void) const { return java_type; }
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144
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145 octave_base_value* clone (void) const { return new octave_java (*this); }
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146 octave_base_value* empty_clone (void) const { return new octave_java (); }
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147
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148 bool is_defined (void) const { return true; }
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149
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150 bool is_map (void) const { return true; }
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151
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152 string_vector map_keys (void) const;
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153
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154 dim_vector dims (void) const;
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155
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156 void print (std::ostream& os, bool pr_as_read_syntax = false) const
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157 {
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158 os << "<Java object: " << java_type << ">";
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159 newline(os);
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160 }
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161
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162 void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const
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163 {
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164 print(os, pr_as_read_syntax);
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165 }
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166
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167 octave_value_list
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168 subsref (const std::string& type,
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169 const std::list<octave_value_list>& idx, int nargout);
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170
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171 octave_value
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172 subsref (const std::string& type, const std::list<octave_value_list>& idx)
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173 {
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174 octave_value_list retval = subsref (type, idx, 1);
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175 return (retval.length () > 0 ? retval(0) : octave_value ());
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176 }
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177
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178 octave_value subsasgn (const std::string& type,
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179 const std::list<octave_value_list>& idx,
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180 const octave_value& rhs);
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181
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182 octave_value convert_to_str_internal (bool pad, bool force, char type) const;
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183
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184 bool is_string (void) const
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185 {
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186 JNIEnv *current_env = thread_jni_env ();
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187
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188 if (current_env && java_object)
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189 {
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190 jclass_ref cls (current_env, current_env->FindClass ("java/lang/String"));
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191 return current_env->IsInstanceOf (java_object, cls);
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192 }
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193
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194 return false;
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195 }
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196
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197 static JNIEnv* thread_jni_env (void);
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198
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199 octave_value do_java_invoke (JNIEnv* jni_env, const std::string& name,
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200 const octave_value_list& args);
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201
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202 octave_value
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203 do_java_invoke (const std::string& name, const octave_value_list& args)
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204 {
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205 return do_java_invoke(thread_jni_env (), name, args);
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206 }
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207
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208 static octave_value
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209 do_java_invoke (JNIEnv* jni_env, const std::string& class_name,
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210 const std::string& name, const octave_value_list& args);
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211
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212 static octave_value
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213 do_java_invoke (const std::string& class_name, const std::string& name,
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214 const octave_value_list& args)
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215 {
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216 return do_java_invoke(thread_jni_env (), class_name, name, args);
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217 }
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218
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219 static octave_value
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220 do_java_create (JNIEnv* jni_env, const std::string& name,
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221 const octave_value_list& args);
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222
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223 static octave_value
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224 do_java_create (const std::string& name, const octave_value_list& args)
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225 {
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226 return do_java_create (thread_jni_env (), name, args);
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227 }
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228
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229 octave_value do_java_get (JNIEnv* jni_env, const std::string& name);
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230
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231 octave_value do_java_get (const std::string& name)
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232 {
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233 return do_java_get (thread_jni_env (), name);
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234 }
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235
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236 static octave_value
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237 do_java_get (JNIEnv* jni_env, const std::string& class_name,
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238 const std::string& name);
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239
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240 static octave_value
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241 do_java_get (const std::string& class_name, const std::string& name)
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242 {
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243 return do_java_get (thread_jni_env (), class_name, name);
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244 }
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245
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246 octave_value do_java_set (JNIEnv* jni_env, const std::string& name,
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247 const octave_value& val);
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248
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249 octave_value do_java_set (const std::string& name, const octave_value& val)
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250 {
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251 return do_java_set (thread_jni_env (), name, val);
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252 }
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253
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254 static octave_value
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255 do_java_set (JNIEnv* jni_env, const std::string& class_name,
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256 const std::string& name, const octave_value& val);
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257
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258 static octave_value
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259 do_java_set (const std::string& class_name, const std::string& name,
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260 const octave_value& val)
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261 {
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262 return do_java_set (thread_jni_env (), class_name, name, val);
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263 }
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264
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265 private:
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266
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267 void init (jobject jobj, jclass jcls)
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268 {
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269 JNIEnv *current_env = thread_jni_env ();
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270
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271 if (current_env)
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272 {
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273 if (jobj)
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274 java_object = current_env->NewGlobalRef (jobj);
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275
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276 if (jcls)
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277 java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jcls));
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278 else if (java_object)
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279 {
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280 jclass_ref ocls (current_env, current_env->GetObjectClass (java_object));
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281 java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jclass (ocls)));
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282 }
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283
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284 if (java_class)
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285 {
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286 jclass_ref clsCls (current_env, current_env->GetObjectClass (java_class));
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287 jmethodID mID = current_env->GetMethodID (clsCls, "getCanonicalName", "()Ljava/lang/String;");
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288 jobject_ref resObj (current_env, current_env->CallObjectMethod (java_class, mID));
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289 java_type = jstring_to_string (current_env, resObj);
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290 }
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291 }
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292 }
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293
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294 void release (void)
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295 {
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296 JNIEnv *current_env = thread_jni_env ();
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297
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298 if (current_env)
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299 {
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300 if (java_object)
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301 current_env->DeleteGlobalRef (java_object);
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302
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303 if (java_class)
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304 current_env->DeleteGlobalRef (java_class);
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305
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306 java_object = 0;
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307 java_class = 0;
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308 }
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309 }
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310
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311 private:
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312
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313 DECLARE_OCTAVE_ALLOCATOR
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314
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315 DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
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316
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317 jobject java_object;
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318
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319 jclass java_class;
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320
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321 std::string java_type;
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322 };
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323
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324 #endif