bridges/source/jni_uno/jni_helper.h

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   9  * This file incorporates work covered by the following license notice:
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  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_BRIDGES_SOURCE_JNI_UNO_JNI_HELPER_H
  21 #define INCLUDED_BRIDGES_SOURCE_JNI_UNO_JNI_HELPER_H
  22
  23 #include <sal/config.h>
  24
  25 #include <memory>
  26
  27 #include "jni_base.h"
  28 #include "jni_info.h"
  29
  30
  31 namespace jni_uno
  32 {
  33
  34 inline void jstring_to_ustring(
  35     JNI_context const & jni, rtl_uString ** out_ustr, jstring jstr )
  36 {
  37     if (0 == jstr)
  38     {
  39         rtl_uString_new( out_ustr );
  40     }
  41     else
  42     {
  43         jsize len = jni->GetStringLength( jstr );
  44         std::unique_ptr< rtl_mem > mem(
  45             rtl_mem::allocate(
  46                 sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) ) );
  47         rtl_uString * ustr = reinterpret_cast<rtl_uString *>(mem.get());
  48         jni->GetStringRegion( jstr, 0, len, (jchar *) ustr->buffer );
  49         jni.ensure_no_exception();
  50         ustr->refCount = 1;
  51         ustr->length = len;
  52         ustr->buffer[ len ] = '\0';
  53         mem.release();
  54         if (0 != *out_ustr)
  55             rtl_uString_release( *out_ustr );
  56         *out_ustr = ustr;
  57     }
  58 }
  59
  60 inline OUString jstring_to_oustring(
  61     JNI_context const & jni, jstring jstr )
  62 {
  63     rtl_uString * ustr = 0;
  64     jstring_to_ustring( jni, &ustr, jstr );
  65     return OUString( ustr, SAL_NO_ACQUIRE );
  66 }
  67
  68 inline jstring ustring_to_jstring(
  69     JNI_context const & jni, rtl_uString const * ustr )
  70 {
  71     jstring jstr = jni->NewString( (jchar const *) ustr->buffer, ustr->length );
  72     jni.ensure_no_exception();
  73     return jstr;
  74 }
  75
  76
  77 // if inException, does not handle exceptions, in which case returned value will
  78 // be null if exception occurred:
  79 inline jclass find_class(
  80     JNI_context const & jni, char const * class_name, bool inException = false )
  81 {
  82     // find_class may be called before the JNI_info is set:
  83     jclass c=0;
  84     jmethodID m;
  85     JNI_info const * info = jni.get_info();
  86     if (info == 0) {
  87         jni.getClassForName(&c, &m);
  88         if (c == 0) {
  89             if (inException) {
  90                 return 0;
  91             }
  92             jni.ensure_no_exception();
  93         }
  94     } else {
  95         c = info->m_class_Class;
  96         m = info->m_method_Class_forName;
  97     }
  98     return jni.findClass(class_name, c, m, inException);
  99 }
 100
 101
 102 inline jobject create_type( JNI_context const & jni, jclass clazz )
 103 {
 104     JNI_info const * jni_info = jni.get_info();
 105     jvalue arg;
 106     arg.l = clazz;
 107     jobject jo_type = jni->NewObjectA(
 108         jni_info->m_class_Type, jni_info->m_ctor_Type_with_Class, &arg );
 109     jni.ensure_no_exception();
 110     return jo_type;
 111 }
 112
 113 inline jobject create_type(
 114     JNI_context const & jni, typelib_TypeDescriptionReference * type )
 115 {
 116     JNI_info const * jni_info = jni.get_info();
 117     jvalue args[ 2 ];
 118     // get type class
 119     args[ 0 ].i = type->eTypeClass;
 120     JLocalAutoRef jo_type_class(
 121         jni, jni->CallStaticObjectMethodA(
 122             jni_info->m_class_TypeClass,
 123             jni_info->m_method_TypeClass_fromInt, args ) );
 124     jni.ensure_no_exception();
 125     // construct type
 126     JLocalAutoRef jo_type_name(
 127         jni, ustring_to_jstring( jni, type->pTypeName ) );
 128     args[ 0 ].l = jo_type_name.get();
 129     args[ 1 ].l = jo_type_class.get();
 130     jobject jo_type = jni->NewObjectA(
 131         jni_info->m_class_Type,
 132         jni_info->m_ctor_Type_with_Name_TypeClass, args );
 133     jni.ensure_no_exception();
 134     return jo_type;
 135 }
 136
 137 inline jobject compute_oid( JNI_context const & jni, jobject jo )
 138 {
 139     JNI_info const * jni_info = jni.get_info();
 140     jvalue arg;
 141     arg.l= jo;
 142     jobject jo_oid = jni->CallStaticObjectMethodA(
 143         jni_info->m_class_UnoRuntime,
 144         jni_info->m_method_UnoRuntime_generateOid, &arg );
 145     jni.ensure_no_exception();
 146     return jo_oid;
 147 }
 148
 149 }
 150
 151 #endif
 152
 153 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */