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class=categoryLinkLabel_W154>Fory gRPC</span></a></div><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="categoryLink_byQd menu__link menu__link--sublist menu__link--sublist-caret" role=button aria-expanded=false href=/docs/next/development/><span title=Development class=categoryLinkLabel_W154>Development</span></a></div></ul></nav></div></div></aside><main class=docMainContainer_TBSr><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_VOVn"><div class="theme-doc-version-banner alert alert--warning margin-bottom--md" role=alert><div>This is unreleased documentation for <!-- -->Apache Fory™<!-- --> <b>dev</b> version.</div><div class=margin-top--md>For up-to-date documentation, see the <b><a href=/docs/json/android>latest version</a></b> (<!-- -->1.6.0<!-- -->).</div></div><div class=docItemContainer_Djhp><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label=Breadcrumbs><ul class=breadcrumbs><li class=breadcrumbs__item><a aria-label="Home page" class=breadcrumbs__link href=/><svg viewBox="0 0 24 24" class=breadcrumbHomeIcon_YNFT><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill=currentColor /></svg></a><li class=breadcrumbs__item><span class=breadcrumbs__link>Fory JSON</span><li class="breadcrumbs__item breadcrumbs__item--active"><span class=breadcrumbs__link>Android</span></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: dev</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type=button class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Android</h1></header><p>Fory JSON supports ordinary classes on Android API level 26 and later through the regular |
| <code>fory-json</code> artifact. Runtime JSON code generation and asynchronous compilation are disabled |
| automatically, so <code>ForyJson.builder().build()</code> uses the interpreted object mapper.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=installation-and-codec-model>Installation and Codec Model<a href=#installation-and-codec-model class=hash-link aria-label="Direct link to Installation and Codec Model" title="Direct link to Installation and Codec Model" translate=no></a></h2> |
| <p>Add Fory JSON to the application:</p> |
| <div class="language-kotlin codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-kotlin codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">dependencies </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token function" style=color:#d73a49>implementation</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string-literal singleline string" style=color:#e3116c>"org.apache.fory:fory-json:</span><span class="token string-literal singleline interpolation interpolation-punctuation punctuation" style=color:#393A34>${</span><span class="token string-literal singleline interpolation expression">foryVersion</span><span class="token string-literal singleline interpolation interpolation-punctuation punctuation" style=color:#393A34>}</span><span class="token string-literal singleline string" style=color:#e3116c>"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=custom-codecs>Custom Codecs<a href=#custom-codecs class=hash-link aria-label="Direct link to Custom Codecs" title="Direct link to Custom Codecs" translate=no></a></h2> |
| <p><code>@JsonCodec</code> has the same declaration behavior on Android and the JVM. It supports complete values, |
| direct collection and array elements, <code>Optional</code> and <code>AtomicReference</code> contents, Map keys and |
| values, ordinary getters, setter value parameters, and <code>JsonCreator</code> parameters:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>java</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>util</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">List</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">JsonCodec</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>final</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>class</span><span class="token plain"> </span><span class="token class-name">Invoice</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token annotation punctuation" style=color:#393A34>@JsonCodec</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">elementCodec </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">MoneyCodec</span><span class="token punctuation" style=color:#393A34>.</span><span class="token keyword" style=color:#00009f>class</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token class-name">List</span><span class="token generics punctuation" style=color:#393A34><</span><span class="token generics class-name">Money</span><span class="token generics punctuation" style=color:#393A34>></span><span class="token plain"> items</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>private</span><span class="token plain"> </span><span class="token class-name">Money</span><span class="token plain"> primary</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>void</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>setPrimary</span><span class="token punctuation" style=color:#393A34>(</span><span class="token annotation punctuation" style=color:#393A34>@JsonCodec</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">MoneyCodec</span><span class="token punctuation" style=color:#393A34>.</span><span class="token keyword" style=color:#00009f>class</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token class-name">Money</span><span class="token plain"> primary</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>this</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">primary </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> primary</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token class-name">Invoice</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p>Child codecs act on one direct level only. For example, <code>elementCodec</code> on <code>Money[][]</code> handles each |
| <code>Money[]</code>, and <code>elementCodec</code> on <code>AtomicReferenceArray<Money></code> handles each <code>Money</code>. Use a complete |
| <code>value</code> codec when deeper custom behavior is required.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=generated-access-and-r8-rules>Generated Access and R8 Rules<a href=#generated-access-and-r8-rules class=hash-link aria-label="Direct link to Generated Access and R8 Rules" title="Direct link to Generated Access and R8 Rules" translate=no></a></h2> |
| <p>Add the annotation processor and mark application object models with <code>JsonType</code> to generate direct |
| field, getter, setter, Record constructor, <code>JsonCreator</code>, and <code>JsonValidator</code> operations together |
| with exact R8 rules:</p> |
| <div class="language-kotlin codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-kotlin codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">dependencies </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token function" style=color:#d73a49>annotationProcessor</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string-literal singleline string" style=color:#e3116c>"org.apache.fory:fory-annotation-processor:</span><span class="token string-literal singleline interpolation interpolation-punctuation punctuation" style=color:#393A34>${</span><span class="token string-literal singleline interpolation expression">foryVersion</span><span class="token string-literal singleline interpolation interpolation-punctuation punctuation" style=color:#393A34>}</span><span class="token string-literal singleline string" style=color:#e3116c>"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">JsonType</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">JsonValidator</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token annotation punctuation" style=color:#393A34>@JsonType</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>final</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>class</span><span class="token plain"> </span><span class="token class-name">Invoice</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>long</span><span class="token plain"> total</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token annotation punctuation" style=color:#393A34>@JsonValidator</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>void</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>validate</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">total </span><span class="token operator" style=color:#393A34><</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>0</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>throw</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token class-name">IllegalArgumentException</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"total must not be negative"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=mixins>Mixins<a href=#mixins class=hash-link aria-label="Direct link to Mixins" title="Direct link to Mixins" translate=no></a></h2> |
| <p>The same processor supports Fory JSON Mixins. A Mixin declares one exact target and is registered |
| on the <code>ForyJson</code> builder that should use it:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">ForyJson</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">JsonBase64</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>json</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">JsonMixin</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token annotation punctuation" style=color:#393A34>@JsonMixin</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">target </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">ThirdPartyInvoice</span><span class="token punctuation" style=color:#393A34>.</span><span class="token keyword" style=color:#00009f>class</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>abstract</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>class</span><span class="token plain"> </span><span class="token class-name">ThirdPartyInvoiceMixin</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token annotation punctuation" style=color:#393A34>@JsonBase64</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token punctuation" style=color:#393A34>]</span><span class="token plain"> signature</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">ForyJson</span><span class="token plain"> json </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">ForyJson</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>registerMixin</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">ThirdPartyInvoiceMixin</span><span class="token punctuation" style=color:#393A34>.</span><span class="token keyword" style=color:#00009f>class</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>build</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <p>Compile every non-empty Mixin source with <code>fory-annotation-processor</code>. The processor emits exact |
| R8 rules and any pair-specific target operations that the built <code>ForyJson</code> instance can use. Registered codecs, |
| effective type codecs, and built-in mappings keep their normal codec-selection precedence. An empty Mixin |
| produces no generated output.</p> |
| <p>A Mixin may place <code>JsonValidator</code> on a public abstract zero-argument <code>void</code> method that exactly |
| matches a public target method. The generated pair calls that target method directly. The target |
| does not need <code>JsonType</code> solely for a Mixin validator.</p> |
| <p>The target does not need <code>JsonType</code> merely because it has a Mixin. <code>JsonMixin</code> is itself the |
| processor entry point for the pair. If a target also uses <code>JsonType</code>, the built <code>ForyJson</code> instance selects the |
| pair-specific companion for a non-empty registered Mixin instead of combining the overlay with the |
| target's direct companion.</p> |
| <p>Only one source is enabled for an exact target in one built <code>ForyJson</code> instance. A later registration for that |
| target replaces an earlier registration on the builder, and <code>build()</code> snapshots the selected |
| mapping. The processor may generate artifacts for multiple source alternatives; the built instance uses |
| only the last registered source.</p> |
| <p>Use the processor-generated R8 rules for non-empty Mixins instead of broad package keep rules.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=reflection-based-models>Reflection-Based Models<a href=#reflection-based-models class=hash-link aria-label="Direct link to Reflection-Based Models" title="Direct link to Reflection-Based Models" translate=no></a></h2> |
| <p>Ordinary non-Record classes that omit <code>JsonType</code> can supply equivalent exact rules themselves unless |
| they declare <code>JsonValidator</code>. Direct validators require the processor-generated calls from |
| <code>JsonType</code>; do not replace them with reflection rules. Retain every model constructor, field, |
| method, generic signature, declaration annotation, and parameter annotation used by Fory JSON, |
| plus the public no-argument constructor of every annotation-selected codec. For a model without a |
| validator:</p> |
| <div class="language-proguard codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-proguard codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">-keepattributes Signature,RuntimeVisibleAnnotations,RuntimeVisibleParameterAnnotations</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">-keepattributes AnnotationDefault,MethodParameters,InnerClasses,EnclosingMethod</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">-keep,allowoptimization class com.example.Invoice {</span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> public <init>();</span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> public java.util.List items;</span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> public void setPrimary(com.example.Money);</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">}</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">-keep,allowoptimization,allowobfuscation class com.example.MoneyCodec {</span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> public <init>();</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">}</span><br/></div></code></pre></div></div> |
| <p>The same exact-rule approach supports every <code>JsonCodec</code> member; it is not limited to complete-value |
| codecs. <code>JsonType</code> is not required for codec selection on an ordinary class.</p> |
| <p>For <code>@JsonType</code> models, generated operations and R8 rules also cover effective <code>JsonValidator</code> |
| methods, <code>JsonValue</code> fields and effective methods, fixed <code>JsonRawValue</code> and <code>JsonBase64</code> fields and |
| getters, <code>JsonFormat</code> date/time fields, their runtime annotations, and the Base64 codec constructor. |
| Without <code>@JsonType</code>, the value, raw, Base64, format, and codec annotations still work through |
| reflection, but a release-minified application must keep the exact annotated members, annotation |
| attributes, and codec constructor itself. A <code>JsonValue</code> method may use a non-JavaBean name, so its |
| manual rule must name that method explicitly. <code>JsonFormat</code> keeps the same direct-field and |
| one-wrapper-level behavior as on the JVM, including <code>timezone</code> for <code>Instant</code>, <code>ZonedDateTime</code>, and |
| <code>OffsetDateTime</code>.</p> |
| <p>Android Fory JSON requires a retained no-argument constructor for an ordinary mutable class; it may |
| be non-public when Android reflection can make it accessible. <code>JsonCreator</code> constructor-backed |
| classes follow the normal creator rules instead. Retain every field and method used for reflection, |
| or use an application codec when a model cannot satisfy those requirements. <code>JsonUnwrapped</code> |
| supports mutable classes, creator-backed classes, and Records through their normal property and |
| construction paths. When the containing model and its unwrapped children use <code>JsonType</code>, their |
| generated companions supply those operations.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=records>Records<a href=#records class=hash-link aria-label="Direct link to Records" title="Direct link to Records" translate=no></a></h2> |
| <p>Android-desugared Records require processor-generated operations from either a direct <code>@JsonType</code> |
| declaration or a compiled exact <code>@JsonMixin</code> pair. Manual R8 rules alone cannot reconstruct Record |
| component order because Android does not provide the Java Record reflection APIs. This also applies |
| to a Record whose complete representation is a <code>JsonValue</code> String: the generated companion |
| identifies the propagated component accessor and calls an annotated one-String canonical |
| constructor directly. Generated child codecs act on one level exactly as they do on the JVM. Every |
| Record in a <code>JsonUnwrapped</code> path needs its own direct <code>JsonType</code> declaration or compiled exact |
| <code>JsonMixin</code> pair. Use a complete value codec for deeper nested behavior.</div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="row margin-top--sm theme-doc-footer-edit-meta-row"><div class="col noPrint_WFHX"><a href=https://github.com/apache/fory-site/tree/main/docs/json/android.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg fill=currentColor height=20 width=20 viewBox="0 0 40 40" class=iconEdit_Z9Sw aria-hidden=true><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"/></g></svg>Edit this page</a></div><div class="col lastUpdated_JAkA"></div></div></footer></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href=/docs/next/json/custom-codecs><div class=pagination-nav__sublabel>Previous</div><div class=pagination-nav__label>Custom Codecs</div></a><a class="pagination-nav__link pagination-nav__link--next" href=/docs/next/json/graalvm><div class=pagination-nav__sublabel>Next</div><div class=pagination-nav__label>GraalVM Native Image</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href=#installation-and-codec-model class="table-of-contents__link toc-highlight">Installation and Codec Model</a><li><a href=#custom-codecs class="table-of-contents__link toc-highlight">Custom Codecs</a><li><a href=#generated-access-and-r8-rules class="table-of-contents__link toc-highlight">Generated Access and R8 Rules</a><li><a href=#mixins class="table-of-contents__link toc-highlight">Mixins</a><li><a href=#reflection-based-models class="table-of-contents__link toc-highlight">Reflection-Based Models</a><li><a href=#records class="table-of-contents__link toc-highlight">Records</a></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="theme-layout-footer-column col footer__col"><div class=footer__title>Community</div><ul class="footer__items clean-list"><li class=footer__item><a href=https://lists.apache.org/list.html?dev@fory.apache.org target=_blank rel="noopener noreferrer" class=footer__link-item>Mailing list<svg width=13.5 height=13.5 aria-label="(opens in new tab)" class=iconExternalLink_nPIU><use href=#theme-svg-external-link /></svg></a><li class=footer__item><a href=https://join.slack.com/t/fory-project/shared_invite/zt-1u8soj4qc-ieYEu7ciHOqA2mo47llS8A target=_blank rel="noopener noreferrer" class=footer__link-item>Slack<svg width=13.5 height=13.5 aria-label="(opens in new tab)" class=iconExternalLink_nPIU><use href=#theme-svg-external-link /></svg></a><li class=footer__item><a href=https://twitter.com/ApacheFory target=_blank rel="noopener noreferrer" class=footer__link-item>Twitter<svg width=13.5 height=13.5 aria-label="(opens in new tab)" class=iconExternalLink_nPIU><use href=#theme-svg-external-link /></svg></a></ul></div><div class="theme-layout-footer-column col footer__col"><div class=footer__title>Docs</div><ul class="footer__items clean-list"><li class=footer__item><a class=footer__link-item href=/docs/start/>Install</a><li class=footer__item><a class=footer__link-item href=/docs/start/>Usage</a><li class=footer__item><a class=footer__link-item href=/docs/benchmarks/>Benchmark</a></ul></div><div class="theme-layout-footer-column col footer__col"><div class=footer__title>Repositories</div><ul class="footer__items clean-list"><li class=footer__item><a href=https://github.com/apache/fory target=_blank rel="noopener noreferrer" class=footer__link-item>Apache Fory™<svg width=13.5 height=13.5 aria-label="(opens in new tab)" class=iconExternalLink_nPIU><use href=#theme-svg-external-link /></svg></a><li class=footer__item><a href=https://github.com/apache/fory-site target=_blank rel="noopener noreferrer" class=footer__link-item>Website<svg width=13.5 height=13.5 aria-label="(opens in new tab)" class=iconExternalLink_nPIU><use href=#theme-svg-external-link /></svg></a></ul></div></div><div class="footer__bottom text--center"><div class=margin-bottom--sm><a href=https://apache.org/ rel="noopener noreferrer" class=footerLogoLink_BH7S><img src=/img/asf_logo.svg alt="ASF Logo" class="footer__logo themedComponent_mlkZ themedComponent--light_NVdE" width=200 /><img src=/img/asf_logo.svg alt="ASF Logo" class="footer__logo themedComponent_mlkZ themedComponent--dark_xIcU" width=200 /></a></div><div class=footer__copyright><div> |
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