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javassist/html/javassist/bytecode/Descriptor.html

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  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

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  3. <html lang="en">

  4. <head>

  5. <!-- Generated by javadoc (10.0.1) on Thu Jun 21 01:52:55 JST 2018 -->

  6. <title>Descriptor (Javassist API)</title>

  7. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

  8. <meta name="date" content="2018-06-21">

  9. <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">

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  24.             parent.document.title="Descriptor (Javassist API)";

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  30. var methods = {"i0":9,"i1":9,"i2":9,"i3":9,"i4":9,"i5":9,"i6":9,"i7":9,"i8":9,"i9":9,"i10":9,"i11":9,"i12":9,"i13":9,"i14":9,"i15":9,"i16":9,"i17":9,"i18":9,"i19":9,"i20":9,"i21":9,"i22":9,"i23":9,"i24":9,"i25":9,"i26":9};

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  50. <li><a href="../../overview-summary.html">Overview</a></li>

  51. <li><a href="package-summary.html">Package</a></li>

  52. <li class="navBarCell1Rev">Class</li>

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  89. <div>JavaScript is disabled on your browser.</div>

  90. </noscript>

  91. </div>

  92. <div>

  93. <ul class="subNavList">

  94. <li>Summary:&nbsp;</li>

  95. <li><a href="#nested.class.summary">Nested</a>&nbsp;|&nbsp;</li>

  96. <li>Field&nbsp;|&nbsp;</li>

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  117. <!-- ======== START OF CLASS DATA ======== -->

  118. <div class="header">

  119. <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="../../javassist/bytecode/package-summary.html">javassist.bytecode</a></div>

  120. <h2 title="Class Descriptor" class="title">Class Descriptor</h2>

  121. </div>

  122. <div class="contentContainer">

  123. <ul class="inheritance">

  124. <li>java.lang.Object</li>

  125. <li>

  126. <ul class="inheritance">

  127. <li>javassist.bytecode.Descriptor</li>

  128. </ul>

  129. </li>

  130. </ul>

  131. <div class="description">

  132. <ul class="blockList">

  133. <li class="blockList">

  134. <hr>

  135. <pre>public class <span class="typeNameLabel">Descriptor</span>

  136. extends java.lang.Object</pre>

  137. <div class="block">A support class for dealing with descriptors.

  138. 

  139.  <p>See chapter 4.3 in "The Java Virtual Machine Specification (2nd ed.)"</div>

  140. </li>

  141. </ul>

  142. </div>

  143. <div class="summary">

  144. <ul class="blockList">

  145. <li class="blockList">

  146. <!-- ======== NESTED CLASS SUMMARY ======== -->

  147. <ul class="blockList">

  148. <li class="blockList"><a name="nested.class.summary">

  149. <!--   -->

  150. </a>

  151. <h3>Nested Class Summary</h3>

  152. <table class="memberSummary" summary="Nested Class Summary table, listing nested classes, and an explanation">

  153. <caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>

  154. <tr>

  155. <th class="colFirst" scope="col">Modifier and Type</th>

  156. <th class="colSecond" scope="col">Class</th>

  157. <th class="colLast" scope="col">Description</th>

  158. </tr>

  159. <tr class="altColor">

  160. <td class="colFirst"><code>static class&nbsp;</code></td>

  161. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.Iterator.html" title="class in javassist.bytecode">Descriptor.Iterator</a></span></code></th>

  162. <td class="colLast">

  163. <div class="block">An Iterator over a descriptor.</div>

  164. </td>

  165. </tr>

  166. </table>

  167. </li>

  168. </ul>

  169. <!-- ======== CONSTRUCTOR SUMMARY ======== -->

  170. <ul class="blockList">

  171. <li class="blockList"><a name="constructor.summary">

  172. <!--   -->

  173. </a>

  174. <h3>Constructor Summary</h3>

  175. <table class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">

  176. <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>

  177. <tr>

  178. <th class="colFirst" scope="col">Constructor</th>

  179. <th class="colLast" scope="col">Description</th>

  180. </tr>

  181. <tr class="altColor">

  182. <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#Descriptor--">Descriptor</a></span>()</code></th>

  183. <td class="colLast">&nbsp;</td>

  184. </tr>

  185. </table>

  186. </li>

  187. </ul>

  188. <!-- ========== METHOD SUMMARY =========== -->

  189. <ul class="blockList">

  190. <li class="blockList"><a name="method.summary">

  191. <!--   -->

  192. </a>

  193. <h3>Method Summary</h3>

  194. <table class="memberSummary" summary="Method Summary table, listing methods, and an explanation">

  195. <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>

  196. <tr>

  197. <th class="colFirst" scope="col">Modifier and Type</th>

  198. <th class="colSecond" scope="col">Method</th>

  199. <th class="colLast" scope="col">Description</th>

  200. </tr>

  201. <tr id="i0" class="altColor">

  202. <td class="colFirst"><code>static java.lang.String</code></td>

  203. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#appendParameter-java.lang.String-java.lang.String-">appendParameter</a></span>&#8203;(java.lang.String&nbsp;classname,

  204.                java.lang.String&nbsp;desc)</code></th>

  205. <td class="colLast">

  206. <div class="block">Appends a parameter type to the parameter list represented

  207.  by the given descriptor.</div>

  208. </td>

  209. </tr>

  210. <tr id="i1" class="rowColor">

  211. <td class="colFirst"><code>static java.lang.String</code></td>

  212. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#appendParameter-javassist.CtClass-java.lang.String-">appendParameter</a></span>&#8203;(<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>&nbsp;type,

  213.                java.lang.String&nbsp;descriptor)</code></th>

  214. <td class="colLast">

  215. <div class="block">Appends a parameter type to the parameter list represented

  216.  by the given descriptor.</div>

  217. </td>

  218. </tr>

  219. <tr id="i2" class="altColor">

  220. <td class="colFirst"><code>static int</code></td>

  221. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#arrayDimension-java.lang.String-">arrayDimension</a></span>&#8203;(java.lang.String&nbsp;desc)</code></th>

  222. <td class="colLast">

  223. <div class="block">Computes the dimension of the array represented by the given

  224.  descriptor.</div>

  225. </td>

  226. </tr>

  227. <tr id="i3" class="rowColor">

  228. <td class="colFirst"><code>static java.lang.String</code></td>

  229. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#changeReturnType-java.lang.String-java.lang.String-">changeReturnType</a></span>&#8203;(java.lang.String&nbsp;classname,

  230.                 java.lang.String&nbsp;desc)</code></th>

  231. <td class="colLast">

  232. <div class="block">Changes the return type included in the given descriptor.</div>

  233. </td>

  234. </tr>

  235. <tr id="i4" class="altColor">

  236. <td class="colFirst"><code>static int</code></td>

  237. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#dataSize-java.lang.String-">dataSize</a></span>&#8203;(java.lang.String&nbsp;desc)</code></th>

  238. <td class="colLast">

  239. <div class="block">Computes the data size specified by the given descriptor.</div>

  240. </td>

  241. </tr>

  242. <tr id="i5" class="rowColor">

  243. <td class="colFirst"><code>static boolean</code></td>

  244. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#eqParamTypes-java.lang.String-java.lang.String-">eqParamTypes</a></span>&#8203;(java.lang.String&nbsp;desc1,

  245.             java.lang.String&nbsp;desc2)</code></th>

  246. <td class="colLast">

  247. <div class="block">Returns true if the list of the parameter types of desc1 is equal to

  248.  that of desc2.</div>

  249. </td>

  250. </tr>

  251. <tr id="i6" class="altColor">

  252. <td class="colFirst"><code>static java.lang.String</code></td>

  253. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#getParamDescriptor-java.lang.String-">getParamDescriptor</a></span>&#8203;(java.lang.String&nbsp;decl)</code></th>

  254. <td class="colLast">

  255. <div class="block">Returns the signature of the given descriptor.</div>

  256. </td>

  257. </tr>

  258. <tr id="i7" class="rowColor">

  259. <td class="colFirst"><code>static <a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>[]</code></td>

  260. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#getParameterTypes-java.lang.String-javassist.ClassPool-">getParameterTypes</a></span>&#8203;(java.lang.String&nbsp;desc,

  261.                  <a href="../../javassist/ClassPool.html" title="class in javassist">ClassPool</a>&nbsp;cp)</code></th>

  262. <td class="colLast">

  263. <div class="block">Returns the <code>CtClass</code> objects representing the parameter

  264.  types specified by the given descriptor.</div>

  265. </td>

  266. </tr>

  267. <tr id="i8" class="altColor">

  268. <td class="colFirst"><code>static <a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a></code></td>

  269. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#getReturnType-java.lang.String-javassist.ClassPool-">getReturnType</a></span>&#8203;(java.lang.String&nbsp;desc,

  270.              <a href="../../javassist/ClassPool.html" title="class in javassist">ClassPool</a>&nbsp;cp)</code></th>

  271. <td class="colLast">

  272. <div class="block">Returns the <code>CtClass</code> object representing the return

  273.  type specified by the given descriptor.</div>

  274. </td>

  275. </tr>

  276. <tr id="i9" class="rowColor">

  277. <td class="colFirst"><code>static java.lang.String</code></td>

  278. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#insertParameter-java.lang.String-java.lang.String-">insertParameter</a></span>&#8203;(java.lang.String&nbsp;classname,

  279.                java.lang.String&nbsp;desc)</code></th>

  280. <td class="colLast">

  281. <div class="block">Inserts a parameter type at the beginning of the parameter

  282.  list represented

  283.  by the given descriptor.</div>

  284. </td>

  285. </tr>

  286. <tr id="i10" class="altColor">

  287. <td class="colFirst"><code>static java.lang.String</code></td>

  288. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#insertParameter-javassist.CtClass-java.lang.String-">insertParameter</a></span>&#8203;(<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>&nbsp;type,

  289.                java.lang.String&nbsp;descriptor)</code></th>

  290. <td class="colLast">

  291. <div class="block">Inserts a parameter type at the beginning of the parameter

  292.  list represented

  293.  by the given descriptor.</div>

  294. </td>

  295. </tr>

  296. <tr id="i11" class="rowColor">

  297. <td class="colFirst"><code>static int</code></td>

  298. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#numOfParameters-java.lang.String-">numOfParameters</a></span>&#8203;(java.lang.String&nbsp;desc)</code></th>

  299. <td class="colLast">

  300. <div class="block">Returns the number of the prameters included in the given

  301.  descriptor.</div>

  302. </td>

  303. </tr>

  304. <tr id="i12" class="altColor">

  305. <td class="colFirst"><code>static java.lang.String</code></td>

  306. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#of-java.lang.String-">of</a></span>&#8203;(java.lang.String&nbsp;classname)</code></th>

  307. <td class="colLast">

  308. <div class="block">Converts to a descriptor from a Java class name</div>

  309. </td>

  310. </tr>

  311. <tr id="i13" class="rowColor">

  312. <td class="colFirst"><code>static java.lang.String</code></td>

  313. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#of-javassist.CtClass-">of</a></span>&#8203;(<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>&nbsp;type)</code></th>

  314. <td class="colLast">

  315. <div class="block">Returns the descriptor representing the given type.</div>

  316. </td>

  317. </tr>

  318. <tr id="i14" class="altColor">

  319. <td class="colFirst"><code>static java.lang.String</code></td>

  320. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#ofConstructor-javassist.CtClass:A-">ofConstructor</a></span>&#8203;(<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>[]&nbsp;paramTypes)</code></th>

  321. <td class="colLast">

  322. <div class="block">Returns the descriptor representing a constructor receiving

  323.  the given parameter types.</div>

  324. </td>

  325. </tr>

  326. <tr id="i15" class="rowColor">

  327. <td class="colFirst"><code>static java.lang.String</code></td>

  328. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/Descriptor.html#ofMethod-javassist.CtClass-javassist.CtClass:A-">ofMethod</a></span>&#8203;(<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>&nbsp;returnType,

  329.         <a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>[]&nbsp;paramTypes)</code></th>

  330. <td class="colLast">

  331. <div class="block">Returns the descriptor representing a method that receives

  332.  the given parameter types and returns the given type.</div>

  333. </td>

  334. </tr>

  335. <tr id="i16" class="altColor">

  336. <td class="colFirst"><code>static java.lang.String</code></td>

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  788. <a name="numOfParameters-java.lang.String-">

  789. <!--   -->

  790. </a>

  791. <ul class="blockList">

  792. <li class="blockList">

  793. <h4>numOfParameters</h4>

  794. <pre>public static&nbsp;int&nbsp;numOfParameters&#8203;(java.lang.String&nbsp;desc)</pre>

  795. <div class="block">Returns the number of the prameters included in the given

  796.  descriptor.</div>

  797. <dl>

  798. <dt><span class="paramLabel">Parameters:</span></dt>

  799. <dd><code>desc</code> - descriptor</dd>

  800. </dl>

  801. </li>

  802. </ul>

  803. <a name="toCtClass-java.lang.String-javassist.ClassPool-">

  804. <!--   -->

  805. </a>

  806. <ul class="blockList">

  807. <li class="blockList">

  808. <h4>toCtClass</h4>

  809. <pre>public static&nbsp;<a href="../../javassist/CtClass.html" title="class in javassist">CtClass</a>&nbsp;toCtClass&#8203;(java.lang.String&nbsp;desc,

  810.                                 <a href="../../javassist/ClassPool.html" title="class in javassist">ClassPool</a>&nbsp;cp)

  811.                          throws <a href="../../javassist/NotFoundException.html" title="class in javassist">NotFoundException</a></pre>

  812. <div class="block">Returns a <code>CtClass</code> object representing the type

  813.  specified by the given descriptor.

  814. 

  815.  <p>This method works even if the package-class separator is

  816.  not <code>/</code> but <code>.</code> (period).  For example,

  817.  it accepts <code>Ljava.lang.Object;</code>

  818.  as well as <code>Ljava/lang/Object;</code>.</div>

  819. <dl>

  820. <dt><span class="paramLabel">Parameters:</span></dt>

  821. <dd><code>desc</code> - descriptor.</dd>

  822. <dd><code>cp</code> - the class pool used for obtaining

  823.              a <code>CtClass</code> object.</dd>

  824. <dt><span class="throwsLabel">Throws:</span></dt>

  825. <dd><code><a href="../../javassist/NotFoundException.html" title="class in javassist">NotFoundException</a></code></dd>

  826. </dl>

  827. </li>

  828. </ul>

  829. <a name="arrayDimension-java.lang.String-">

  830. <!--   -->

  831. </a>

  832. <ul class="blockList">

  833. <li class="blockList">

  834. <h4>arrayDimension</h4>

  835. <pre>public static&nbsp;int&nbsp;arrayDimension&#8203;(java.lang.String&nbsp;desc)</pre>

  836. <div class="block">Computes the dimension of the array represented by the given

  837.  descriptor.  For example, if the descriptor is <code>"[[I"</code>,

  838.  then this method returns 2.</div>

  839. <dl>

  840. <dt><span class="paramLabel">Parameters:</span></dt>

  841. <dd><code>desc</code> - the descriptor.</dd>

  842. <dt><span class="returnLabel">Returns:</span></dt>

  843. <dd>0        if the descriptor does not represent an array type.</dd>

  844. </dl>

  845. </li>

  846. </ul>

  847. <a name="toArrayComponent-java.lang.String-int-">

  848. <!--   -->

  849. </a>

  850. <ul class="blockList">

  851. <li class="blockList">

  852. <h4>toArrayComponent</h4>

  853. <pre>public static&nbsp;java.lang.String&nbsp;toArrayComponent&#8203;(java.lang.String&nbsp;desc,

  854.                                                 int&nbsp;dim)</pre>

  855. <div class="block">Returns the descriptor of the type of the array component.

  856.  For example, if the given descriptor is

  857.  <code>"[[Ljava/lang/String;"</code> and the given dimension is 2,

  858.  then this method returns <code>"Ljava/lang/String;"</code>.</div>

  859. <dl>

  860. <dt><span class="paramLabel">Parameters:</span></dt>

  861. <dd><code>desc</code> - the descriptor.</dd>

  862. <dd><code>dim</code> - the array dimension.</dd>

  863. </dl>

  864. </li>

  865. </ul>

  866. <a name="dataSize-java.lang.String-">

  867. <!--   -->

  868. </a>

  869. <ul class="blockList">

  870. <li class="blockList">

  871. <h4>dataSize</h4>

  872. <pre>public static&nbsp;int&nbsp;dataSize&#8203;(java.lang.String&nbsp;desc)</pre>

  873. <div class="block">Computes the data size specified by the given descriptor.

  874.  For example, if the descriptor is "D", this method returns 2.

  875. 

  876.  <p>If the descriptor represents a method type, this method returns

  877.  (the size of the returned value) - (the sum of the data sizes

  878.  of all the parameters).  For example, if the descriptor is

  879.  <code>"(I)D"</code>, then this method returns 1 (= 2 - 1).</div>

  880. <dl>

  881. <dt><span class="paramLabel">Parameters:</span></dt>

  882. <dd><code>desc</code> - descriptor</dd>

  883. </dl>

  884. </li>

  885. </ul>

  886. <a name="paramSize-java.lang.String-">

  887. <!--   -->

  888. </a>

  889. <ul class="blockList">

  890. <li class="blockList">

  891. <h4>paramSize</h4>

  892. <pre>public static&nbsp;int&nbsp;paramSize&#8203;(java.lang.String&nbsp;desc)</pre>

  893. <div class="block">Computes the data size of parameters.

  894.  If one of the parameters is double type, the size of that parameter

  895.  is 2 words.  For example, if the given descriptor is

  896.   <code>"(IJ)D"</code>, then this method returns 3.  The size of the

  897.  return type is not computed.</div>

  898. <dl>

  899. <dt><span class="paramLabel">Parameters:</span></dt>

  900. <dd><code>desc</code> - a method descriptor.</dd>

  901. </dl>

  902. </li>

  903. </ul>

  904. <a name="toString-java.lang.String-">

  905. <!--   -->

  906. </a>

  907. <ul class="blockListLast">

  908. <li class="blockList">

  909. <h4>toString</h4>

  910. <pre>public static&nbsp;java.lang.String&nbsp;toString&#8203;(java.lang.String&nbsp;desc)</pre>

  911. <div class="block">Returns a human-readable representation of the

  912.  given descriptor.  For example, <code>Ljava/lang/Object;</code>

  913.  is converted into <code>java.lang.Object</code>.

  914.  <code>(I[I)V</code> is converted into <code>(int, int[])</code>

  915.  (the return type is ignored).</div>

  916. </li>

  917. </ul>

  918. </li>

  919. </ul>

  920. </li>

  921. </ul>

  922. </div>

  923. </div>

  924. <!-- ========= END OF CLASS DATA ========= -->

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  934. <li><a href="../../overview-summary.html">Overview</a></li>

  935. <li><a href="package-summary.html">Package</a></li>

  936. <li class="navBarCell1Rev">Class</li>

  937. <li><a href="class-use/Descriptor.html">Use</a></li>

  938. <li><a href="package-tree.html">Tree</a></li>

  939. <li><a href="../../deprecated-list.html">Deprecated</a></li>

  940. <li><a href="../../index-all.html">Index</a></li>

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  969. </div>

  970. <div>

  971. <ul class="subNavList">

  972. <li>Summary:&nbsp;</li>

  973. <li><a href="#nested.class.summary">Nested</a>&nbsp;|&nbsp;</li>

  974. <li>Field&nbsp;|&nbsp;</li>

  975. <li><a href="#constructor.summary">Constr</a>&nbsp;|&nbsp;</li>

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  988. <!-- ======== END OF BOTTOM NAVBAR ======= -->

  989. <p class="legalCopy"><small><i>Javassist, a Java-bytecode translator toolkit.<br>

  990. Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.</i></small></p>

  991. </body>

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