/usr/share/doc/libdbus-java/dbus-java/dbus-javase7.html is in libdbus-java-doc 2.8-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 | <?xml version="1.0" encoding="iso-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!--http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd-->
<html xmlns="http://www.w3.org/1999/xhtml"
>
<head><title>D-Bus Types</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="generator" content="TeX4ht (http://www.cse.ohio-state.edu/~gurari/TeX4ht/)" />
<meta name="originator" content="TeX4ht (http://www.cse.ohio-state.edu/~gurari/TeX4ht/)" />
<!-- xhtml,2,html -->
<meta name="src" content="dbus-java.tex" />
<meta name="date" content="2014-02-01 19:41:00" />
<link rel="stylesheet" type="text/css" href="dbus-java.css" />
</head><body
>
<!--l. 470--><div class="crosslinks"><p class="noindent">[<a
href="dbus-javase6.html" >prev</a>] [<a
href="dbus-javase6.html#taildbus-javase6.html" >prev-tail</a>] [<a
href="#taildbus-javase7.html">tail</a>] [<a
href="dbus-java.html# " >up</a>] </p></div>
<h3 class="sectionHead"><span class="titlemark">7 </span> <a
id="x24-200007"></a>D-Bus Types</h3>
<!--l. 472--><p class="noindent" >D-Bus supports a number of types in its messages, some which Java supports natively, and
some which it doesn’t. This library provides a way of modelling the extra D-Bus
Types in Java. The full list of types and what D-Bus type they map to is in table
<a
href="#x24-310011">1<!--tex4ht:ref: table:types --></a>.
</p><!--l. 477--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.1 </span> <a
id="x24-210007.1"></a>Basic Types</h4>
<!--l. 479--><p class="noindent" >All of Java’s basic types are supported as parameters and return types to methods, and
as parameters to signals. These can be used in either their primitive or wrapper
types.
</p><!--l. 481--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">7.1.1 </span> <a
id="x24-220007.1.1"></a>Unsigned Types</h5>
<!--l. 483--><p class="noindent" >D-Bus, like C and similar languages, has a notion of unsigned numeric types. The library supplies
<span
class="cmtt-12">UInt16</span><span class="footnote-mark"><a
href="dbus-java25.html#fn14x0"><sup class="textsuperscript">14</sup></a></span><a
id="x24-22001f14"></a> ,
<span
class="cmtt-12">UInt32 </span>and <span
class="cmtt-12">UInt64 </span>classes to represent these new basic types.
</p>
<h4 class="subsectionHead"><span class="titlemark">7.2 </span> <a
id="x24-230007.2"></a>Strings</h4>
<!--l. 490--><p class="noindent" >D-Bus also supports sending Strings. When mentioned below, Strings count as a basic
type.
</p><!--l. 493--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">7.2.1 </span> <a
id="x24-240007.2.1"></a>String Comparisons</h5>
<!--l. 495--><p class="noindent" >There may be some problems with comparing strings received over D-Bus with strings
generated locally when using the String.equals method. This is due to how the Strings are
generated from a UTF8 encoding. The recommended way to compare strings which have been
sent over D-Bus is with the <span
class="cmtt-12">java.text.Collator </span>class. Figure <a
href="#x24-2400110">10<!--tex4ht:ref: fig:collator --></a> demonstrates its
use.
</p>
<hr class="figure" /><div class="figure"
>
<a
id="x24-2400110"></a>
<div class="center"
>
<!--l. 502--><p class="noindent" >
</p>
<div class="verbatim" id="verbatim-16">
String rname = remote.getName();
 <br />Collator col = Collator.getInstance();
 <br />col.setDecomposition(Collator.FULL_DECOMPOSITION);
 <br />col.setStrength(Collator.PRIMARY);
 <br />if (0 != col.compare("Name", rname))
 <br />   fail("getName return value incorrect");
</div>
<!--l. 510--><p class="nopar" ></p></div>
<br /> <div class="caption"
><span class="id">Figure 10: </span><span
class="content">Comparing strings with <span
class="cmtt-12">java.text.Collator</span>.</span></div><!--tex4ht:label?: x24-2400110 -->
</div><hr class="endfigure" />
<h4 class="subsectionHead"><span class="titlemark">7.3 </span> <a
id="x24-250007.3"></a>Arrays</h4>
<!--l. 518--><p class="noindent" >You can send arrays of any valid D-Bus Type over D-Bus. These can either be declared in Java
as arrays (e.g. <span class="obeylines-h"><span class="verb"><span
class="cmtt-12">Integer[]</span></span></span> or <span class="obeylines-h"><span class="verb"><span
class="cmtt-12">int[]</span></span></span>) or as Lists (e.g. <span class="obeylines-h"><span class="verb"><span
class="cmtt-12">List<String></span></span></span>). All lists <span
class="cmbx-12">must </span>be
parameterised with their type in the source (reflection on this is used by the library to
determine their type). Also note that arrays cannot be used as part of more complex type, only
Lists (for example <span class="obeylines-h"><span class="verb"><span
class="cmtt-12">List<List<String>></span></span></span>).
</p><!--l. 525--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.4 </span> <a
id="x24-260007.4"></a>Maps</h4>
<!--l. 527--><p class="noindent" >D-Bus supports a dictionary type analogous to the Java Map type. This has the additional
restriction that only basic types can be used as the key (including String). Any valid
D-Bus type can be the value. As with lists, maps must be fully parameterised. (e.g.
<span class="obeylines-h"><span class="verb"><span
class="cmtt-12">Map<Integer,</span><span
class="cmtt-12"> String></span></span></span>).
</p><!--l. 533--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.5 </span> <a
id="x24-270007.5"></a>Variants</h4>
<!--l. 535--><p class="noindent" >D-Bus has support for a Variant type. This is similar to declaring that a method takes a parameter of
type <span
class="cmtt-12">Object</span>, in that a Variant may contain any other type. Variants can either be declared using the
<span
class="cmtt-12">Variant</span><span class="footnote-mark"><a
href="dbus-java26.html#fn15x0"><sup class="textsuperscript">15</sup></a></span><a
id="x24-27001f15"></a>
class, or as a Type Variable. In the latter case the value is automatically unwrapped and passed
to the function. Variants in compound types (Arrays, Maps, etc) must be declared using
the Variant class with the full type passed to the Variant constructor and manually
unwrapped.
</p><!--l. 544--><p class="indent" > Both these methods use variants:
</p>
<div class="verbatim" id="verbatim-17">
public void display(Variant v);
 <br />public <T> int hash(T v);
</div>
<!--l. 549--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.6 </span> <a
id="x24-280007.6"></a>Structs</h4>
<!--l. 553--><p class="noindent" >D-Bus has a struct type, which is a collection of other types. Java does
not have an analogue of this other than fields in classes, and due to the
limitation of Java reflection this is not sufficient. The library declares a
<span
class="cmtt-12">Struct</span><span class="footnote-mark"><a
href="dbus-java27.html#fn16x0"><sup class="textsuperscript">16</sup></a></span><a
id="x24-28001f16"></a>
class which can be used to create structs. To define a struct you extend the <span
class="cmtt-12">Struct </span>class and
define fields for each member of the struct. These fields then need to be annotated in the order
which they appear in the struct (class fields do not have a defined order). You must also define
a single constructor which takes the contents of he struct in order. This is best demonstrated
by an example. Figure <a
href="#x24-2800211">11<!--tex4ht:ref: fig:struct --></a> shows a Struct definition, and figure <a
href="#x24-2800312">12<!--tex4ht:ref: fig:structmethod --></a> shows this being used as a
parameter to a method.
</p>
<hr class="figure" /><div class="figure"
>
<a
id="x24-2800211"></a>
<div class="center"
>
<!--l. 565--><p class="noindent" >
</p>
<div class="verbatim" id="verbatim-18">
package org.freedesktop.dbus.test;
 <br />
 <br />import org.freedesktop.dbus.DBusException;
 <br />import org.freedesktop.dbus.Position;
 <br />import org.freedesktop.dbus.Struct;
 <br />
 <br />public final class TestStruct extends Struct
 <br />{
 <br />   @Position(0)
 <br />   public final String a;
 <br />   @Position(1)
 <br />   public final int b;
 <br />   @Position(2)
 <br />   public final String c;
 <br />   public Struct3(String a, int b, String c)
 <br />   {
 <br />      this.a = a;
 <br />      this.b = b;
 <br />      this.c = c;
 <br />   }
 <br />}
</div>
<!--l. 588--><p class="nopar" ></p></div>
<br /> <div class="caption"
><span class="id">Figure 11: </span><span
class="content">A Struct with three elements</span></div><!--tex4ht:label?: x24-2800211 -->
</div><hr class="endfigure" />
<hr class="figure" /><div class="figure"
>
<a
id="x24-2800312"></a>
<div class="center"
>
<!--l. 595--><p class="noindent" >
</p>
<div class="verbatim" id="verbatim-19">
public void do(TestStruct data);
</div>
<!--l. 598--><p class="nopar" ></p></div>
<br /> <div class="caption"
><span class="id">Figure 12: </span><span
class="content">A struct as a parameter to a method</span></div><!--tex4ht:label?: x24-2800312 -->
</div><hr class="endfigure" />
<!--l. 605--><p class="indent" > Section <a
href="dbus-javase10.html#x32-3500010">10<!--tex4ht:ref: sec:create --></a> describes how these can be automatically generated from D-Bus introspection
data.
</p>
<h4 class="subsectionHead"><span class="titlemark">7.7 </span> <a
id="x24-290007.7"></a>Objects</h4>
<!--l. 610--><p class="noindent" >You can pass references to exportable objects round using their object paths. To do
this in Java you declare a type of <span
class="cmtt-12">DBusInterface</span>. When the library receive- an
object path it will automatically convert it into the object you are exporting with
that object path. You can pass remote objects back to their processes in a similar
fashion.
</p><!--l. 616--><p class="indent" > Using a parameter of type <span
class="cmtt-12">DBusInterface </span>can cause the automatic creation of a proxy
object using introspection. If the remote app does not support introspection, or the object does
not exist at the time you receive the message then this will fail. In that case the parameter can
be declared to be of type <span
class="cmtt-12">Path</span>. In this case no automatic creation will be performed and you
can get the path as a string with either the <span
class="cmtt-12">getPath </span>or <span
class="cmtt-12">toString </span>methods on the <span
class="cmtt-12">Path</span>
object.
</p><!--l. 625--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.8 </span> <a
id="x24-300007.8"></a>Multiple Return Values</h4>
<!--l. 627--><p class="noindent" >D-Bus also allows functions to return multiple values, a concept not supported
by Java. This has been solved in a fashion similar to the struct, using a
<span
class="cmtt-12">Tuple</span><span class="footnote-mark"><a
href="dbus-java28.html#fn17x0"><sup class="textsuperscript">17</sup></a></span><a
id="x24-30001f17"></a>
class. Tuples are defined as generic tuples which can be parameterised for different types and
just need to be defined of the appropriate length. This can be seen in figure <a
href="#x24-3000213">13<!--tex4ht:ref: fig:tuple --></a> and a
call in figure <a
href="#x24-3000314">14<!--tex4ht:ref: fig:tuplemethod --></a>. Again, these can be automatically generated from introspection
data.
</p>
<hr class="figure" /><div class="figure"
>
<a
id="x24-3000213"></a>
<div class="center"
>
<!--l. 636--><p class="noindent" >
</p>
<div class="verbatim" id="verbatim-20">
import org.freedesktop.dbus.Tuple;
 <br />
 <br />public final class TestTuple<A, B, C> extends Tuple
 <br />{
 <br />   public final A a;
 <br />   public final B b;
 <br />   public final C c;
 <br />   public TestTuple(A a, B b, C c)
 <br />   {
 <br />      this.a = a;
 <br />      this.b = b;
 <br />      this.c = c;
 <br />   }
 <br />}
</div>
<!--l. 652--><p class="nopar" ></p></div>
<br /> <div class="caption"
><span class="id">Figure 13: </span><span
class="content">A 3-tuple</span></div><!--tex4ht:label?: x24-3000213 -->
</div><hr class="endfigure" />
<hr class="figure" /><div class="figure"
>
<a
id="x24-3000314"></a>
<div class="center"
>
<!--l. 659--><p class="noindent" >
</p>
<div class="verbatim" id="verbatim-21">
public ThreeTuple<String, Integer, Boolean> status(int item);
</div>
<!--l. 662--><p class="nopar" ></p></div>
<br /> <div class="caption"
><span class="id">Figure 14: </span><span
class="content">A Tuple being returned from a method</span></div><!--tex4ht:label?: x24-3000314 -->
</div><hr class="endfigure" />
<h4 class="subsectionHead"><span class="titlemark">7.9 </span> <a
id="x24-310007.9"></a>Full list of types</h4>
<!--l. 670--><p class="noindent" >Table <a
href="#x24-310011">1<!--tex4ht:ref: table:types --></a> contains a full list of all the Java types and their corresponding D-Bus types.
</p>
<div class="table">
<!--l. 673--><p class="indent" > <a
id="x24-310011"></a></p><hr class="float" /><div class="float"
>
<div class="center"
>
<!--l. 673--><p class="noindent" >
</p>
<div class="tabular"> <table id="TBL-2" class="tabular"
cellspacing="0" cellpadding="0" rules="groups"
><colgroup id="TBL-2-1g"><col
id="TBL-2-1" /></colgroup><colgroup id="TBL-2-2g"><col
id="TBL-2-2" /></colgroup><tr
style="vertical-align:baseline;" id="TBL-2-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-1-1"
class="td11"><span
class="cmbx-12">Java Type </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-1-2"
class="td11"><span
class="cmbx-12">D-Bus Type </span></td>
</tr><tr
class="hline"><td><hr /></td><td><hr /></td></tr><tr
style="vertical-align:baseline;" id="TBL-2-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-1"
class="td11">Byte </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-2"
class="td11">DBUS_TYPE_BYTE </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-1"
class="td11">byte </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-2"
class="td11">DBUS_TYPE_BYTE </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-4-1"
class="td11">Boolean </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-4-2"
class="td11">DBUS_TYPE_BOOLEAN </td></tr><tr
style="vertical-align:baseline;" id="TBL-2-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-5-1"
class="td11">boolean </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-5-2"
class="td11">DBUS_TYPE_BOOLEAN</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-6-1"
class="td11">Short </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-6-2"
class="td11">DBUS_TYPE_INT16 </td></tr><tr
style="vertical-align:baseline;" id="TBL-2-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-7-1"
class="td11">short </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-7-2"
class="td11">DBUS_TYPE_INT16</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-8-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-8-1"
class="td11">UInt16 </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-8-2"
class="td11">DBUS_TYPE_UINT16 </td></tr><tr
style="vertical-align:baseline;" id="TBL-2-9-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-9-1"
class="td11">int </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-9-2"
class="td11">DBUS_TYPE_INT32</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-10-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-10-1"
class="td11">Integer </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-10-2"
class="td11">DBUS_TYPE_INT32 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-11-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-11-1"
class="td11">UInt32 </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-11-2"
class="td11">DBUS_TYPE_UINT32 </td></tr><tr
style="vertical-align:baseline;" id="TBL-2-12-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-12-1"
class="td11">long </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-12-2"
class="td11">DBUS_TYPE_INT64</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-13-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-13-1"
class="td11">Long </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-13-2"
class="td11">DBUS_TYPE_INT64 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-14-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-14-1"
class="td11">UInt64 </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-14-2"
class="td11">DBUS_TYPE_UINT64 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-15-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-15-1"
class="td11">double </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-15-2"
class="td11">DBUS_TYPE_DOUBLE </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-16-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-16-1"
class="td11">Double </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-16-2"
class="td11">DBUS_TYPE_DOUBLE </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-17-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-17-1"
class="td11">String </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-17-2"
class="td11">DBUS_TYPE_STRING </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-18-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-18-1"
class="td11">Path </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-18-2"
class="td11">DBUS_TYPE_OBJECT_PATH</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-19-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-19-1"
class="td11"><span
class="cmmi-12"><</span>T<span
class="cmmi-12">> </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-2-19-2"
class="td11">DBUS_TYPE_VARIANT </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-20-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-20-1"
class="td11">Variant </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-20-2"
class="td11">DBUS_TYPE_VARIANT </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-21-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-21-1"
class="td11">? extends Struct </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-21-2"
class="td11">DBUS_TYPE_STRUCT </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-22-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-22-1"
class="td11">?[ ] </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-22-2"
class="td11">DBUS_TYPE_ARRAY </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-23-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-23-1"
class="td11">? extends List </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-23-2"
class="td11">DBUS_TYPE_ARRAY </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-24-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-24-1"
class="td11">? extends Map </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-24-2"
class="td11">DBUS_TYPE_DICT </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-25-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-25-1"
class="td11">? extends DBusInterface</td><td style="white-space:nowrap; text-align:left;" id="TBL-2-25-2"
class="td11">DBUS_TYPE_OBJECT_PATH</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-26-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-26-1"
class="td11">Type[ ] </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-26-2"
class="td11">DBUS_TYPE_SIGNATURE </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-2-27-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-27-1"
class="td11"> </td></tr></table></div></div>
<br /> <div class="caption"
><span class="id">Table 1: </span><span
class="content">Mapping between Java types and D-Bus types</span></div><!--tex4ht:label?: x24-310011 -->
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">7.9.1 </span> <a
id="x24-320007.9.1"></a>float</h5>
<!--l. 710--><p class="noindent" >Currently the D-Bus reference implementation does not support a native single-precision
floating point type. Along with the C# implementation of the protocol, the Java
implementation supports this extension to the protocol. By default, however, the library
operates in compatibility mode and converts all floats to the double type. To disable
compatibility mode export the environment variable <span
class="cmtt-12">DBUS</span><span
class="cmtt-12">_JAVA</span><span
class="cmtt-12">_FLOATS=true</span>.
</p>
<!--l. 717--><div class="crosslinks"><p class="noindent">[<a
href="dbus-javase6.html" >prev</a>] [<a
href="dbus-javase6.html#taildbus-javase6.html" >prev-tail</a>] [<a
href="dbus-javase7.html" >front</a>] [<a
href="dbus-java.html# " >up</a>] </p></div>
<!--l. 717--><p class="indent" > <a
id="taildbus-javase7.html"></a> </p>
</body></html>
|