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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Java language binding for Web IDL</title>
<link rel="stylesheet" href="WebIDL.css" type="text/css" />
<script src="section-links.js" type="application/ecmascript"></script>
<script src="dfn.js" type="application/ecmascript"></script>
<link rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-WG-NOTE" type="text/css" /></head>
<body>
<div class="head"><div><a href="http://www.w3.org/"><img src="http://www.w3.org/Icons/w3c_home" width="72" height="48" alt="W3C" /></a></div><h1>Java language binding for Web IDL</h1><h2>W3C Working Group Note <em>14 May 2013</em></h2><dl><dt>This Version:</dt><dd><a href="http://www.w3.org/TR/2013/NOTE-WebIDL-Java-20130514/">http://www.w3.org/TR/2013/NOTE-WebIDL-Java-20130514/</a></dd><dt>Current Editor’s Draft:</dt><dd><a href="http://dev.w3.org/2006/webapi/WebIDL/java.html">http://dev.w3.org/2006/webapi/WebIDL/java.html</a></dd><dt>Latest Version:</dt><dd><a href="http://www.w3.org/TR/WebIDL-Java/">http://www.w3.org/TR/WebIDL-Java/</a></dd><dt>Previous Version:</dt><dd><a href="http://www.w3.org/TR/2012/WD-WebIDL-Java-20120207/">http://www.w3.org/TR/2012/WD-WebIDL-Java-20120207/</a></dd><dt>Editor:</dt><dd><a href="http://mcc.id.au/">Cameron McCormack</a>, Mozilla Corporation <cam@mcc.id.au></dd></dl><p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2013 <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>, <a href="http://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>, <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved. W3C <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>, <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.</p></div><hr />
<div class="section">
<h2>Abstract</h2>
<p>
This document defines the Java language binding for Web IDL,
the interface definition language for the Web platform.
</p>
</div>
<div class="section">
<h2>Status of This Document</h2>
<p><em>
This section describes the status of this document at the time of
its publication. Other documents may supersede this document. A list
of current W3C publications and the latest revision of this technical
report can be found in the <a href="http://www.w3.org/TR/">W3C technical
reports index</a> at http://www.w3.org/TR/.
</em></p><p>
Please send comments about this document to
<a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>
(<a href="http://lists.w3.org/Archives/Public/public-script-coord/">archived</a>).
</p>
<p>
This document originally existed as a section in the <cite>Web IDL</cite>
specification. <a href="#ref-WEBIDL">[WEBIDL]</a> It was split out into this Working Group Note due to the prospect of it
impeding the progress of <cite>Web IDL</cite> due to having insufficient implementations and because
of a general lack of interest in the Java binding.
</p>
<p>
This document is produced by the
<a href="http://www.w3.org/2008/webapps/">Web Applications Working Group</a>, part of the
<a href="http://www.w3.org/2006/rwc/Activity">Rich Web Clients Activity</a>
in the W3C <a href="http://www.w3.org/Interaction/">Interaction Domain</a>.
Changes made to this document can be found in the
<a href="http://dev.w3.org/cvsweb/2006/webapi/WebIDL/java.xml">W3C
public CVS server</a>.
</p>
<p>
<strong>Note: The Working Group <a href="http://lists.w3.org/Archives/Public/public-webapps/2013AprJun/0398.html">reached consensus</a>
to stop work on this specification. It is being published for archival
reasons and is no longer being progressed along the W3C's Recommendation Track.</strong>
</p>
<!--
<p>
In addition to the issues marked by editorial notes in this document,
the <a href='http://www.w3.org/Bugs/Public/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&product=WebAppsWG&component=WebIDL&longdesc_type=allwordssubstr&longdesc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=allwordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&emailtype1=substring&email1=&emailtype2=substring&email2=&bug_id_type=anyexact&bug_id=&votes=&chfieldfrom=&chfieldto=Now&chfieldvalue=&cmdtype=doit&order=Reuse+same+sort+as+last+time&field0-0-0=noop&type0-0-0=noop&value0-0-0='>Web IDL component in the W3C Bugzilla instance</a>
can be used file and track bugs.
</p>
-->
<p>
Publication as a Working Group Note does not imply endorsement by the
W3C Membership. This is a draft document and may be updated, replaced
or obsoleted by other documents at any time. It is inappropriate to cite
this document as other than work in progress.
</p><p>
This document was produced by a group operating under the
<a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February
2004 W3C Patent Policy</a>. W3C maintains a
<a href="http://www.w3.org/2004/01/pp-impl/42538/status">public list of
any patent disclosures</a> made in connection with the deliverables of
the group; that page also includes instructions for disclosing a patent.
An individual who has actual knowledge of a patent which the individual
believes contains
<a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
Claim(s)</a> must disclose the information in accordance with
<a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
6 of the W3C Patent Policy</a>.
</p>
</div>
<div id="toc">
<h2>Table of Contents</h2>
<div class="toc"><ul><li><a href="#introduction">1. Introduction</a><ul><li><a href="#conventions">1.1. Typographic conventions</a></li></ul></li><li><a href="#conformance">2. Conformance</a></li><li><a href="#java-binding">3. Java binding</a><ul><li><a href="#java-names">3.1. Names</a></li><li><a href="#java-type-mapping">3.2. Java type mapping</a><ul><li><a href="#java-any">3.2.1. any</a></li><li><a href="#java-void">3.2.2. void</a></li><li><a href="#java-boolean">3.2.3. boolean</a></li><li><a href="#java-byte">3.2.4. byte</a></li><li><a href="#java-octet">3.2.5. octet</a></li><li><a href="#java-short">3.2.6. short</a></li><li><a href="#java-unsigned-short">3.2.7. unsigned short</a></li><li><a href="#java-long">3.2.8. long</a></li><li><a href="#java-unsigned-long">3.2.9. unsigned long</a></li><li><a href="#java-long-long">3.2.10. long long</a></li><li><a href="#java-unsigned-long-long">3.2.11. unsigned long long</a></li><li><a href="#java-float">3.2.12. float</a></li><li><a href="#java-unrestricted-float">3.2.13. unrestricted float</a></li><li><a href="#java-double">3.2.14. double</a></li><li><a href="#java-unrestricted-double">3.2.15. unrestricted double</a></li><li><a href="#java-DOMString">3.2.16. DOMString</a></li><li><a href="#java-object">3.2.17. object</a></li><li><a href="#java-interface">3.2.18. Interface types</a></li><li><a href="#java-dictionary">3.2.19. Dictionary types</a></li><li><a href="#java-enumeration">3.2.20. Enumeration types</a></li><li><a href="#java-callback-function">3.2.21. Callback function types</a></li><li><a href="#java-nullable-type">3.2.22. Nullable types — <var>T</var>?</a></li><li><a href="#java-sequence">3.2.23. Sequences — sequence<<var>T</var>></a></li><li><a href="#java-array">3.2.24. Arrays — <var>T</var>[]</a></li><li><a href="#java-union">3.2.25. Union types</a></li><li><a href="#java-Date">3.2.26. Date</a></li></ul></li><li><a href="#java-extended-attributes">3.3. Java-specific extended attributes</a><ul><li><a href="#JavaPackage">3.3.1. [JavaPackage]</a></li></ul></li><li><a href="#java-interfaces">3.4. Interfaces</a><ul><li><a href="#java-constants">3.4.1. Constants</a></li><li><a href="#java-operations">3.4.2. Operations</a></li><li><a href="#java-attributes">3.4.3. Attributes</a></li></ul></li><li><a href="#java-callback-functions">3.5. Callback functions</a></li><li><a href="#java-platform-objects">3.6. Platform objects implementing interfaces</a></li><li><a href="#java-user-objects">3.7. User objects implementing callback interfaces</a></li><li><a href="#java-exceptions">3.8. Exceptions</a><ul><li><a href="#java-exception-constants">3.8.1. Constants</a></li><li><a href="#java-exception-fields">3.8.2. Exception fields</a></li></ul></li><li><a href="#java-exception-throwing">3.9. Throwing exceptions</a></li></ul></li><li><a href="#extensibility">4. Extensibility</a></li><li><a href="#referencing">5. Referencing this specification</a></li><li><a href="#acknowledgements">6. Acknowledgements</a></li></ul><ul><li><a href="#references">A. References</a><ul><li><a href="#normative-references">A.1. Normative references</a></li></ul></li><li><a href="#changes">B. Changes</a></li></ul></div>
</div>
<div id="sections">
<div id="introduction" class="section">
<h2>1. Introduction</h2>
<p class="norm">This section is informative.</p>
<p>
This document defines a Web IDL language binding for Java 5. <a href="#ref-WEBIDL">[WEBIDL]</a> <a href="#ref-JLS3">[JLS3]</a>
</p>
<div id="conventions" class="section">
<h3>1.1. Typographic conventions</h3>
<p>
The following typographic conventions are used in this document:
</p>
<ul>
<li>Defining instances of terms: <dfn id="dfn-example-term">example term</dfn></li>
<li>Links to terms defined in this document: <a class="dfnref" href="#dfn-example-term">example term</a></li>
<li>Links to terms defined in other documents: <a class="dfnref external" href="#dfn-example-term">example term</a></li>
<li>IDL and Java types: <span class="idltype">ExampleType</span></li>
<li>Code snippets: <code>a = b + obj.f()</code></li>
<li>Unicode characters: <span class="char">U+0030 DIGIT ZERO ("0")</span></li>
<li>Extended attributes: <span class="xattr">[ExampleExtendedAttribute]</span></li>
<li>Variable names in prose and algorithms: <var>exampleVariableName</var>.</li>
<li>Non-normative notes: <div class="note"><div class="noteHeader">Note</div><p>This is a note.</p></div></li>
<li>Non-normative examples: <div class="example"><div class="exampleHeader">Example</div><p>This is an example.</p></div></li>
<!--
<li>Normative warnings: <div class='warning'><p>This is a warning.</p></div></li>
-->
<li>Code blocks: <div class="block"><div class="blockTitleDiv"><span class="blockTitle">IDL</span></div><div class="blockContent"><pre class="code"><code class="idl-code"><span class="comment">// This is an IDL code block.</span>
interface Example {
attribute long something;
};</code></pre></div></div>
<div class="block"><div class="blockTitleDiv"><span class="blockTitle">Java</span></div><div class="blockContent"><pre class="code"><code class="java-code"><span class="comment">// This is a Java code block.</span>
Document doc = element.getOwnerDocument();</code></pre></div></div></li>
</ul>
</div>
</div>
<div id="conformance" class="section">
<h2>2. Conformance</h2>
<p>
Everything in this specification is normative except for diagrams,
examples, notes and sections marked as being informative.
</p>
<p>
The keywords “<span class="rfc2119">MUST</span>”,
“<span class="rfc2119">MUST NOT</span>”,
“<span class="rfc2119">REQUIRED</span>”,
“<span class="rfc2119">SHALL</span>”,
“<span class="rfc2119">SHALL NOT</span>”,
“<span class="rfc2119">SHOULD</span>”,
“<span class="rfc2119">SHOULD NOT</span>”,
“<span class="rfc2119">RECOMMENDED</span>”,
“<span class="rfc2119">MAY</span>” and
“<span class="rfc2119">OPTIONAL</span>” in this document are to be
interpreted as described in
<cite><a href="http://tools.ietf.org/html/rfc2119">Key words for use in RFCs to
Indicate Requirement Levels</a></cite>
<a href="#ref-RFC2119">[RFC2119]</a>.
</p>
<p>
The following conformance class is defined by this specification:
</p>
<dl>
<dt><dfn id="dfn-conforming-java-implementation">conforming Java implementation</dfn></dt>
<dd>
<p>
A user agent is considered to be a
<a class="dfnref" href="#dfn-conforming-java-implementation">conforming Java implementation</a>
relative to a <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-conforming-idl-fragment">conforming
IDL fragment</a> if it satisfies all of the <span class="rfc2119">MUST</span>-,
<span class="rfc2119">REQUIRED</span>- and <span class="rfc2119">SHALL</span>-level
criteria in this specification that apply to implementations for the Java
language binding.
</p>
</dd>
</dl>
</div>
<div id="java-binding" class="section">
<h2>3. Java binding</h2>
<p>
This section describes how definitions written with Web IDL <a href="#ref-WEBIDL">[WEBIDL]</a>
correspond to particular constructs in Java 5 <a href="#ref-JLS3">[JLS3]</a>.
</p>
<div id="java-names" class="section">
<h3>3.1. Names</h3>
<p>
Since Java has a number of reserved words in the language, some identifiers
of Java constructs corresponding to IDL definitions need to be escaped
to avoid conflicts. A name is <dfn id="dfn-java-escaped">Java escaped</dfn>
as follows:
</p>
<ul>
<li>
If the name is a Java reserved word, then the Java escaped name is the
name prefixed with a <span class="char">U+005F LOW LINE ("_")</span>
character.
</li>
<li>
Otherwise, the name is not a Java reserved word. The Java escaped name
is simply the name.
</li>
</ul>
<div class="note"><div class="noteHeader">Note</div>
<p>
At the time of publication, the list of Java reserved words is the following:
<code>abstract</code>,
<code>assert</code>,
<code>boolean</code>,
<code>break</code>,
<code>byte</code>,
<code>case</code>,
<code>catch</code>,
<code>char</code>,
<code>class</code>,
<code>const</code>,
<code>continue</code>,
<code>default</code>,
<code>do</code>,
<code>double</code>,
<code>else</code>,
<code>enum</code>,
<code>extends</code>,
<code>final</code>,
<code>finally</code>,
<code>float</code>,
<code>for</code>,
<code>goto</code>,
<code>if</code>,
<code>implements</code>,
<code>import</code>,
<code>instanceof</code>,
<code>int</code>,
<code>interface</code>,
<code>long</code>,
<code>native</code>,
<code>new</code>,
<code>package</code>,
<code>private</code>,
<code>protected</code>,
<code>public</code>,
<code>return</code>,
<code>short</code>,
<code>static</code>,
<code>strictfp</code>,
<code>super</code>,
<code>switch</code>,
<code>synchronized</code>,
<code>this</code>,
<code>throw</code>,
<code>throws</code>,
<code>transient</code>,
<code>try</code>,
<code>void</code>,
<code>volatile</code>,
<code>while</code>.
</p>
</div>
</div>
<div id="java-type-mapping" class="section">
<h3>3.2. Java type mapping</h3>
<p>
This section describes how types in the IDL map to types
in Java.
</p>
<p>
Each sub-section below describes how values of a given IDL type
are represented in Java. For each IDL type, it is described how
Java values are <dfn id="dfn-convert-java-to-idl-value">converted to an IDL value</dfn>
when passed as an argument to a Java method (corresponding
to an <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-operation">operation</a> or
<a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-attribute">attribute</a>). Conversely,
it is described how IDL values of that type are
<dfn id="dfn-convert-idl-to-java-value">converted to Java values</dfn>
when being used as the value of a Java final variable (corresponding
to a <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-constant">constant</a>) or when
returned from a Java method (corresponding to an operation,
attribute or <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-exception-field">exception field</a>).
</p>
<div id="java-any" class="section">
<h4>3.2.1. any</h4>
<p>
The <a class="idltype external" href="http://heycam.github.io/webidl/#idl-any">any</a> IDL type corresponds to a
Java <span class="javatype">java.lang.Object</span> value.
</p>
<p>
How to <a class="dfnref" href="#dfn-convert-java-to-idl-value">convert a Java value</a>
to an IDL <span class="idltype">any</span> value depends on the
type of the Java value:
</p>
<dl class="switch">
<dt>A <span class="javatype">java.lang.Boolean</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>booleanValue()</code> method on the
<span class="javatype">java.lang.Boolean</span> object to an IDL
<span class="idltype">boolean</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Byte</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>byteValue()</code> method on the
<span class="javatype">java.lang.Byte</span> object to an IDL
<span class="idltype">byte</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Short</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>shortValue()</code> method on the
<span class="javatype">java.lang.Short</span> object to an IDL
<span class="idltype">short</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Integer</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>intValue()</code> method on the
<span class="javatype">java.lang.Integer</span> object to an IDL
<span class="idltype">long</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Long</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>longValue()</code> method on the
<span class="javatype">java.lang.Long</span> object to an IDL
<span class="idltype">long long</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Float</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>floatValue()</code> method on the
<span class="javatype">java.lang.Float</span> object to an IDL
<span class="idltype">float</span> value.
</dd>
<dt>A <span class="javatype">java.lang.Double</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the result of calling the <code>doubleValue()</code> method on the
<span class="javatype">java.lang.Double</span> object to an IDL
<span class="idltype">double</span> value.
</dd>
<dt>A <span class="javatype">java.lang.String</span> object</dt>
<dd>
The IDL value is obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the <span class="javatype">java.lang.String</span> object to an IDL
<span class="idltype">DOMString</span> value.
</dd>
<dt>An array object</dt>
<dd>
The IDL value is the <a href="http://heycam.github.io/webidl/#idl-sequence" class="external">IDL sequence</a> obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the Java array object to a sequence, as described in
<a href="#java-sequence">section 3.2.23</a> below.
</dd>
<dt>An object that implements a <a class="dfnref" href="#dfn-java-array-interface">Java array interface</a></dt>
<dd>
The IDL value is the <a href="http://heycam.github.io/webidl/#idl-array" class="external">IDL array</a> obtained
by <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
the Java object to an array, as described in
<a href="#java-array">section 3.2.24</a> below.
</dd>
<dt>An object of any other class</dt>
<dd>
The IDL value is an <span class="idltype">object</span> value
that references the same object.
</dd>
<dt><span class="javavalue">null</span></dt>
<dd>
The IDL value is the <span class="idlvalue">null</span>
<span class="idltype">object?</span> value.
</dd>
</dl>
<p>
How to <a class="dfnref" href="#dfn-convert-idl-to-java-value">convert</a>
an IDL <span class="idltype">any</span> value to a Java
<span class="javatype">java.lang.Object</span> value depends on the
<a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-specific-type">specific type</a> of the IDL value:
</p>
<dl class="switch">
<dt>A value of a <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-primitive-type">primitive type</a></dt>
<dd>
<p>
The Java value is the result of
<a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
the IDL value of the given type to a Java value, and then passing
that value to the static method according to the following table:
</p>
<table class="vert">
<tr>
<th>IDL type</th>
<th>Method</th>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-boolean">boolean</a></td>
<td><code>java.lang.Boolean.valueOf(boolean)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-byte">byte</a></td>
<td><code>java.lang.Byte.valueOf(byte)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a></td>
<td><code>java.lang.Byte.valueOf(byte)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-short">short</a></td>
<td><code>java.lang.Short.valueOf(short)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a></td>
<td><code>java.lang.Short.valueOf(short)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-long">long</a></td>
<td><code>java.lang.Integer.valueOf(int)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a></td>
<td><code>java.lang.Integer.valueOf(int)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-long-long">long long</a></td>
<td><code>java.lang.Long.valueOf(long)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a></td>
<td><code>java.lang.Long.valueOf(long)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-float">float</a></td>
<td><code>java.lang.Float.valueOf(float)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-unrestricted-float">unrestricted float</a></td>
<td><code>java.lang.Float.valueOf(float)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-double">double</a></td>
<td><code>java.lang.Double.valueOf(double)</code></td>
</tr>
<tr>
<td><a class="idltype external" href="http://heycam.github.io/webidl/#idl-unrestricted-double">unrestricted double</a></td>
<td><code>java.lang.Double.valueOf(double)</code></td>
</tr>
</table>
</dd>
<dt>An IDL value of any other type</dt>
<dd>
To obtain a Java value, the rules for converting the <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-specific-type">specific type</a>
of the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-any">any</a> value as described
in the remainder of this section are performed.
</dd>
</dl>
</div>
<div id="java-void" class="section">
<h4>3.2.2. void</h4>
<p>
The only place that the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-void">void</a> type may appear
in IDL is as the <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-return-type">return type</a>
of an <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-operation">operation</a>. Methods on Java objects
that implement an operation whose IDL specifies a <a class="idltype external" href="http://heycam.github.io/webidl/#idl-void">void</a>
return type <span class="rfc2119">MUST</span> be declared to have a return type of <span class="javatype">void</span>.
</p>
</div>
<div id="java-boolean" class="section">
<h4>3.2.3. boolean</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-boolean">boolean</a> values are represented by
Java <span class="javatype">boolean</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">boolean</span> value to an IDL value
is the IDL <span class="idltype">boolean</span>
that represents the same truth value as the Java
<span class="javatype">boolean</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">boolean</span> value to a Java
value is the Java <span class="javatype">boolean</span> that
represents the same truth value as the IDL
<span class="idltype">boolean</span>.
</p>
</div>
<div id="java-byte" class="section">
<h4>3.2.4. byte</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-byte">byte</a> values are
represented by Java <span class="javatype">byte</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">byte</span> value to an IDL value
is the IDL <span class="idltype">byte</span>
that represents the same numeric value as the Java
<span class="javatype">byte</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">byte</span> value to a Java
value is the Java <span class="javatype">byte</span> that
represents the same numeric value as the IDL
<span class="idltype">byte</span>.
</p>
</div>
<div id="java-octet" class="section">
<h4>3.2.5. octet</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> values are represented by
Java <span class="javatype">byte</span> values. Note that while
the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> type is unsigned, with a
range of [0, 255], the Java <span class="javatype">byte</span> type
is signed, with a range of [−128, 127].
</p>
<p>
<a class="dfnref" href="#dfn-convert-idl-to-java-value">Conversion</a>
of an <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> value to a
<span class="javatype">byte</span> is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> value to convert.</li>
<li>If <var>x</var> < 128, return the <span class="javatype">byte</span> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> ≥ 128. Return the <span class="javatype">byte</span> whose value is <var>x</var> − 256.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as having the
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> value stored in
an <span class="javatype">int</span> and casting it to a
<span class="javatype">byte</span>.
</p>
</div>
<p>
<a class="dfnref" href="#dfn-convert-java-to-idl-value">Conversion</a>
of a <span class="javatype">byte</span> to an
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> is performed as
follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the <span class="javatype">byte</span> value to decode.</li>
<li>If <var>x</var> ≥ 0, return the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> < 0. Return the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-octet">octet</a> whose value is <var>x</var> + 256.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as performing a bit-wise AND of the
<span class="javatype">byte</span> value with the
<span class="javatype">int</span> constant
<span class="javavalue">0xff</span>.
</p>
</div>
</div>
<div id="java-short" class="section">
<h4>3.2.6. short</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-short">short</a> values are
represented by Java <span class="javatype">short</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">short</span> value to an IDL value
is the IDL <span class="idltype">short</span>
that represents the same numeric value as the Java
<span class="javatype">short</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">short</span> value to a Java
value is the Java <span class="javatype">short</span> that
represents the same numeric value as the IDL
<span class="idltype">short</span>.
</p>
</div>
<div id="java-unsigned-short" class="section">
<h4>3.2.7. unsigned short</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> values are
represented by Java <span class="javatype">short</span> values. Note that while
the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> type is unsigned, with a
range of [0, 65535], the Java <span class="javatype">short</span> type
is signed, with a range of [−32768, 32767].
</p>
<p>
<a class="dfnref" href="#dfn-convert-idl-to-java-value">Conversion</a>
of an IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> value to a
Java <span class="javatype">short</span> is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> value to convert.</li>
<li>If <var>x</var> < 32768, return the Java <span class="javatype">short</span> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> ≥ 32768. Return the Java <span class="javatype">short</span> whose value is <var>x</var> − 65536.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as having the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> value stored in
an <span class="javatype">int</span> and casting it to a <span class="javatype">short</span>.
</p>
</div>
<p>
<a class="dfnref" href="#dfn-convert-java-to-idl-value">Conversion</a>
of a Java <span class="javatype">short</span> to an IDL
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> value
is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the Java <span class="javatype">short</span> value to decode.</li>
<li>If <var>x</var> ≥ 0, return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> < 0. Return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-short">unsigned short</a> whose value is <var>x</var> + 65536.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as performing a bit-wise AND of the <span class="javatype">short</span> value
with the <span class="javatype">int</span> constant <span class="javavalue">0xffff</span>.
</p>
</div>
</div>
<div id="java-long" class="section">
<h4>3.2.8. long</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-long">long</a> values are
represented by Java <span class="javatype">int</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">int</span> value to an IDL value
is the IDL <span class="idltype">long</span>
that represents the same numeric value as the Java
<span class="javatype">int</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">long</span> value to a Java
value is the Java <span class="javatype">int</span> that
represents the same numeric value as the IDL
<span class="idltype">short</span>.
</p>
</div>
<div id="java-unsigned-long" class="section">
<h4>3.2.9. unsigned long</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> values are
represented by Java <span class="javatype">int</span> values. Note that while
the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> type is unsigned, with a
range of [0, 4294967295], the Java <span class="javatype">int</span> type
is signed, with a range of [−2147483648, 2147483647].
</p>
<p>
<a class="dfnref" href="#dfn-convert-idl-to-java-value">Conversion</a>
of an IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> value to a
Java <span class="javatype">int</span> is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> value to convert.</li>
<li>If <var>x</var> < 2147483648, return the Java <span class="javatype">int</span> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> ≥ 2147483648. Return the Java <span class="javatype">int</span> whose value is <var>x</var> − 4294967296.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as having the <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> value stored in
a Java <span class="javatype">long</span> and casting it to an <span class="javatype">int</span>.
</p>
</div>
<p>
<a class="dfnref" href="#dfn-convert-java-to-idl-value">Conversion</a>
of a Java <span class="javatype">int</span> to an IDL
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> value
is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the Java <span class="javatype">int</span> value to decode.</li>
<li>If <var>x</var> ≥ 0, return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> < 0. Return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long">unsigned long</a> whose value is <var>x</var> + 4294967296.</li>
</ol>
<div class="note"><div class="noteHeader">Note</div>
<p>
In Java this is the same as performing a bit-wise AND of the <span class="javatype">int</span> value
with the <span class="javatype">long</span> constant <span class="javavalue">0xffffffffL</span>.
</p>
</div>
</div>
<div id="java-long-long" class="section">
<h4>3.2.10. long long</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-long-long">long long</a> values are
represented by Java <span class="javatype">long</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">long</span> value to an IDL value
is the IDL <span class="idltype">long long</span>
that represents the same numeric value as the Java
<span class="javatype">long</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">long long</span> value to a Java
value is the Java <span class="javatype">long</span> that
represents the same numeric value as the IDL
<span class="idltype">long long</span>.
</p>
</div>
<div id="java-unsigned-long-long" class="section">
<h4>3.2.11. unsigned long long</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> values are
represented by Java <span class="javatype">long</span> values. Note that while
the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> type is unsigned, with a
range of [0, 18446744073709551615], the Java <span class="javatype">long</span> type
is signed, with a range of [−9223372036854775808, 9223372036854775807].
</p>
<p>
<a class="dfnref" href="#dfn-convert-idl-to-java-value">Conversion</a>
of an IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> value to a
Java <span class="javatype">long</span> is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> value to convert.</li>
<li>If <var>x</var> < 18446744073709551616, return the Java <span class="javatype">long</span> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> ≥ 18446744073709551616. Return the Java <span class="javatype">long</span> whose value is <var>x</var> − 18446744073709551615.</li>
</ol>
<p>
<a class="dfnref" href="#dfn-convert-java-to-idl-value">Conversion</a>
of a Java <span class="javatype">long</span> to an IDL
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> value
is performed as follows:
</p>
<ol class="algorithm">
<li>Let <var>x</var> be the Java <span class="javatype">long</span> value to decode.</li>
<li>If <var>x</var> ≥ 0, return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> whose value is <var>x</var>.</li>
<li>Otherwise <var>x</var> < 0. Return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unsigned-long-long">unsigned long long</a> whose value is <var>x</var> + 18446744073709551615.</li>
</ol>
</div>
<div id="java-float" class="section">
<h4>3.2.12. float</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-float">float</a> values are
represented by Java <span class="javatype">float</span> values.
</p>
<p>
A Java <span class="javatype">float</span> value <var>V</var> is <a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <span class="idltype">float</span> value as follows:
</p>
<ol class="algorithm">
<li>
If <var>V</var> is non-finite, then throw a <span class="javatype">java.lang.IllegalArgumentException</span>.
</li>
<li>
Otherwise, the IDL <span class="idltype">float</span> value is the one
that represents the same IEEE 754 single precision floating point value as <var>V</var>.
</li>
</ol>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">float</span> value to a Java
value is the Java <span class="javatype">float</span> that
represents the same IEEE 754 single precision floating point value as the IDL
<span class="idltype">float</span>.
</p>
</div>
<div id="java-unrestricted-float" class="section">
<h4>3.2.13. unrestricted float</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unrestricted-float">unrestricted float</a> values are
represented by Java <span class="javatype">float</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">float</span> value to an IDL <span class="idltype">unrestricted float</span>
value is the one that represents the same IEEE 754 single precision floating point value as the Java
<span class="javatype">float</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">unrestricted float</span> value to a Java
value is the Java <span class="javatype">float</span> that
represents the same IEEE 754 single precision floating point value as the IDL
<span class="idltype">unrestricted float</span>.
</p>
</div>
<div id="java-double" class="section">
<h4>3.2.14. double</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-double">double</a> values are
represented by Java <span class="javatype">double</span> values.
</p>
<p>
A Java <span class="javatype">double</span> value <var>V</var> is <a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <span class="idltype">double</span> value as follows:
</p>
<ol class="algorithm">
<li>
If <var>V</var> is non-finite, then throw a <span class="javatype">java.lang.IllegalArgumentException</span>.
</li>
<li>
Otherwise, the IDL <span class="idltype">double</span> value is the one
that represents the same IEEE 754 double precision floating point value as <var>V</var>.
</li>
</ol>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">double</span> value to a Java
value is the Java <span class="javatype">double</span> that
represents the same IEEE 754 double precision floating point value as the IDL
<span class="idltype">double</span>.
</p>
</div>
<div id="java-unrestricted-double" class="section">
<h4>3.2.15. unrestricted double</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-unrestricted-double">unrestricted double</a> values are
represented by Java <span class="javatype">double</span> values.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a>
a Java <span class="javatype">double</span> value to an IDL <span class="idltype">unrestricted double</span>
value is the one that represents the same IEEE 754 double precision floating point value as the Java
<span class="javatype">double</span>.
</p>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">unrestricted double</span> value to a Java
value is the Java <span class="javatype">double</span> that
represents the same IEEE 754 double precision floating point value as the IDL
<span class="idltype">unrestricted double</span>.
</p>
</div>
<div id="java-DOMString" class="section">
<h4>3.2.16. DOMString</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-DOMString">DOMString</a> values are
represented by Java <span class="javatype">java.lang.String</span> reference
values.
</p>
<p>
A Java <span class="javatype">java.lang.String</span> reference value is
<a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <span class="idltype">DOMString</span> value as follows:
</p>
<ul>
<li>If the value is <span class="javavalue">null</span>, then throw a <span class="javatype">java.lang.NullPointerException</span>.</li>
<li>
Otherwise, return the IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-DOMString">DOMString</a>
value that represents the same sequence of <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-code-unit">code units</a> as the one
the Java <span class="javatype">java.lang.String</span> value
represents.
</li>
</ul>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">DOMString</span> value to a Java
<span class="javatype">java.lang.String</span> value is a
<span class="javatype">java.lang.String</span>
object that represents the same sequence of characters that the
IDL <span class="idltype">DOMString</span> represents.
</p>
</div>
<div id="java-object" class="section">
<h4>3.2.17. object</h4>
<p>
IDL <a class="idltype external" href="http://heycam.github.io/webidl/#idl-object">object</a> values are
represented by Java <span class="javatype">java.lang.Object</span> reference
values.
</p>
<p>
A Java <span class="javatype">java.lang.Object</span> reference value is
<a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <span class="idltype">object</span> value as follows:
</p>
<ul>
<li>If the value is <span class="javavalue">null</span>, then throw a <span class="javatype">java.lang.NullPointerException</span>.</li>
<li>
Otherwise, return the IDL <span class="idltype">object</span> value that
is a reference to the same object.
</li>
</ul>
<p>
The result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a>
an IDL <span class="idltype">object</span> value to a Java
value is a Java <span class="javatype">java.lang.Object</span> value
that is a reference to the same object.
</p>
</div>
<div id="java-interface" class="section">
<h4>3.2.18. Interface types</h4>
<p>
IDL <a href="http://heycam.github.io/webidl/#idl-interface" class="external">interface type</a> values are
represented by Java references of the corresponding Java interface type.
(See <a href="#java-interfaces">section 3.4</a> below
for how IDL <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-interface">interfaces</a> have
corresponding Java interfaces.)
</p>
<p>
A Java value <var>V</var> is
<a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <a href="http://heycam.github.io/webidl/#idl-interface" class="external">interface type</a> value
by running the following algorithm (where <var>I</var> is the <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-interface">interface</a>):
</p>
<ol class="algorithm">
<li>If <var>V</var> is a <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-platform-object">platform object</a> that implements <var>I</var>,
then return the IDL <a href="http://heycam.github.io/webidl/#idl-interface" class="external">interface type</a> value that represents a reference to that platform object.</li>
<li>Otherwise, throw a <span class="javatype">java.lang.IllegalArgumentException</span>.</li>
</ol>
<p>
<a class="dfnref" href="#dfn-convert-idl-to-java-value">Conversions from</a> IDL
<a href="http://heycam.github.io/webidl/#idl-interface" class="external">interface type</a> values to Java values
are performed in the same way as that for the IDL
<a class="idltype external" href="http://heycam.github.io/webidl/#idl-object">object</a> type.
</p>
</div>
<div id="java-dictionary" class="section">
<h4>3.2.19. Dictionary types</h4>
<p>
IDL <a href="http://heycam.github.io/webidl/#idl-dictionary" class="external">dictionary type</a> values are
represented by Java references to objects of the
<span class="javatype">java.util.HashMap<java.lang.String,java.lang.Object></span> class.
Each <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-dictionary-member">dictionary member</a> that is
<a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-present">present</a>
corresponds to an entry in the <span class="javatype">HashMap</span>.
</p>
<p>
A Java <span class="javatype">java.util.HashMap<java.lang.String,java.lang.Object></span> reference value
<var>O</var> is
<a class="dfnref" href="#dfn-convert-java-to-idl-value">converted</a>
to an IDL <a href="http://heycam.github.io/webidl/#idl-dictionary" class="external">dictionary type</a> value
by running the following algorithm (where <var>D</var> is the <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-dictionary">dictionary</a>):
</p>
<ol class="algorithm">
<li>If <var>O</var> is <span class="javavalue">null</span>, then throw a <span class="javatype">java.lang.NullPointerException</span>.</li>
<li>Let <var>dict</var> be an empty dictionary value of type <var>D</var>;
every <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-dictionary-member">dictionary member</a>
is initially considered to be <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-present">not present</a>.</li>
<li>Let <var>dictionaries</var> be a list consisting of <var>D</var> and all of <var>D</var>’s <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-inherited-dictionaries">inherited dictionaries</a>,
in order from least to most derived.</li>
<li>For each dictionary <var>dictionary</var> in <var>dictionaries</var>, in order:
<ol>
<li>For each dictionary member <var>member</var> declared on <var>dictionary</var>, in order:
<ol>
<li>Let <var>key</var> be the <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-identifier">identifier</a> of <var>member</var>.</li>
<li>Let <var>javaKey</var> be the result of <a class="dfnref" href="#dfn-convert-idl-to-java-value">converting</a> <var>key</var> to a <span class="javatype">java.lang.String</span>.</li>
<li>Let <var>present</var> be the result of calling the <code>containsKey</code> method on <var>O</var> with <var>javaKey</var> as the only argument.</li>
<li>If <var>present</var> is true, then:
<ol>
<li>Let <var>value</var> be the result of calling the <code>get</code> method on <var>O</var> <var>javaKey</var> as the only argument.</li>
<li>Let <var>idlValue</var> be the result of <a class="dfnref" href="#dfn-convert-java-to-idl-value">converting</a> <var>value</var> to an IDL value whose type is the type <var>member</var> is declared to be of.</li>
<li>Set the dictionary member on <var>dict</var> with key name <var>key</var> to the value <var>idlValue</var>. This dictionary member is considered to be <a class="dfnref external" href="http://heycam.github.io/webidl/#dfn-present">present</a>.</li>
</ol>
</li>
</ol>
</li>
</ol>
</li>
<li>Return <var>dict</var>.</li>
</ol>
<p>
An IDL <a href="http://heycam.github.io/webidl/#idl-dictionary" class="external">dictionary type</a> value <var>V</var> is