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<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2020"><meta name="generator" content="DITA-OT"><meta name="description" content="You can use the dita.conductor.lib.import extension point to add an additional Java library to the DITA-OT classpath parameter."><meta name="keywords" content="deprecated features, property, dost.class.path, plug-ins, Java, Java, classpath, classpath, XSLT"><link rel="stylesheet" type="text/css" href="../css/commonltr.css"><link rel="stylesheet" type="text/css" href="../css/dita-ot-doc.css"><title>Adding a Java library to the classpath</title></head><body id="plugin-javalib"><header role="banner"><div class="header">
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<p>DITA Open Toolkit</p>
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<hr>
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</div></header><nav role="toc"><ul><li><a href="../index.html">DITA Open Toolkit 3.6</a></li><li><a href="../release-notes/index.html">Release Notes</a></li><li><a href="../topics/installing-client.html">Installing DITA-OT</a></li><li><a href="../topics/building-output.html">Building output</a></li><li><a href="../topics/input-formats.html">Authoring formats</a></li><li><a href="../topics/output-formats.html">Output formats</a></li><li><a href="../parameters/index.html">Parameters</a></li><li><a href="../topics/html-customization.html">Customizing HTML</a></li><li><a href="../topics/pdf-customization.html">Customizing PDF</a></li><li><a href="../topics/adding-plugins.html">Adding plug-ins</a></li><li><a href="../topics/custom-plugins.html">Creating plug-ins</a><ul><li><a href="../topics/plugin-benefits.html">Plug-in benefits</a></li><li><a href="../topics/plugin-configfile.html">Plug-in descriptor file</a></li><li><a href="../topics/plugin-coding-conventions.html">Coding conventions</a></li><li><a href="../topics/plugin-dependencies.html">Plug-in dependencies</a></li><li><a href="../topics/plugin-use-cases.html">Plug-in use cases</a><ul><li><a href="../topics/plugin-set-parameters.html">Setting parameters</a></li><li><a href="../topics/plugin-anttarget.html">Adding a new Ant target</a></li><li><a href="../topics/plugin-antpreprocess.html">Adding a pre-processing step</a></li><li><a href="../topics/plugin-newtranstype.html">Adding a new output format</a></li><li><a href="../topics/plugin-xsltparams.html">Adding new parameters</a></li><li><a href="../topics/plugin-overridestyle.html">Overriding XSLT steps</a></li><li class="active"><a href="../topics/plugin-javalib.html">Adding a Java library</a></li><li><a href="../topics/plugin-messages.html">Adding new messages</a></li><li><a href="../topics/plugin-newextensions.html">New extension points</a></li><li><a href="../topics/plugin-xmlcatalog.html">Extending an XML catalog file</a></li><li><a href="../topics/plugin-rewrite-rules.html">Rewriting file names</a></li><li><a href="../topics/implement-saxon-customizations.html">Saxon customizations</a></li></ul></li><li><a href="../topics/html-customization-plugins.html">Custom HTML plug-ins</a></li><li><a href="../topics/pdf-customization-plugins.html">Custom PDF plug-ins</a></li><li><a href="../topics/globalization.html">Globalizing DITA content</a></li><li><a href="../topics/migration.html">Migrating customizations</a></li></ul></li><li><a href="../topics/troubleshooting-overview.html">Troubleshooting</a></li><li><a href="../reference/index.html">Reference</a></li><li><a href="../topics/dita-and-dita-ot-resources.html">Resources</a></li></ul></nav><main role="main"><article role="article" aria-labelledby="ariaid-title1">
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<h1 class="title topictitle1" id="ariaid-title1">Adding a Java library to the <span class="keyword parmname">classpath</span></h1>
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<div class="body taskbody"><p class="shortdesc">You can use the <code class="ph codeph">dita.conductor.lib.import</code> extension point to add an additional Java
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library to the DITA-OT <span class="keyword parmname">classpath</span> parameter.</p>
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<section class="section context"><div class="tasklabel"><h2 class="sectiontitle tasklabel">About this task</h2></div>
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<p class="p">As of DITA-OT 3.1, the Java class path is managed automatically, meaning you do not (and should not) use
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explicit references to Java class paths in your build scripts. In particular, the old
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<code class="ph codeph">dost.class.path</code> property has been deprecated and should not be used. If you are migrating
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older plug-ins that manage their class path directly, you should remove any explicit class path configuration.
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If your plug-in was not already using the <code class="ph codeph">dita.conductor.lib.import</code> extension point to
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integrate its JAR dependencies you must add it.</p>
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<p class="p">The effective DITA-OT class path is the combination of the JAR files in the main <span class="ph filepath">lib/</span>
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directory and the plug-in-contributed JARs, which are listed in <span class="ph filepath">config/env.sh</span>. The
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<span class="ph filepath">env.sh</span> file is updated automatically when plug-ins are installed or removed.</p>
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</section>
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<section><div class="tasklabel"><h2 class="sectiontitle tasklabel">Procedure</h2></div><ol class="ol steps"><li class="li step stepexpand">
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<span class="ph cmd">If necessary, compile the Java code into a JAR file.</span>
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</li><li class="li step stepexpand">
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<span class="ph cmd">Create a <span class="ph filepath">plugin.xml</span> file that contains the following code:</span>
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<div class="itemgroup info"><pre class="pre codeblock language-xml normalize-space show-line-numbers show-whitespace"><code><plugin id="<var class="keyword varname">plugin-id</var>">
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<feature extension="dita.conductor.lib.import" file="<var class="keyword varname">file</var>"/>
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</plugin></code></pre>where:
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<ul class="ul">
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<li class="li"><var class="keyword varname">plugin-id</var> is the plug-in identifier, for example,
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<code class="ph codeph">com.example.addjar</code>.</li>
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<li class="li"><var class="keyword varname">file</var> is the name of the JAR file, for example,
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<span class="ph filepath">myJavaLibrary.jar</span>. </li>
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</ul></div>
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</li><li class="li step stepexpand">
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<span class="ph cmd">Install the plug-in.</span>
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</li></ol></section>
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<section class="section result"><div class="tasklabel"><h2 class="sectiontitle tasklabel">Results</h2></div>The Ant or XSLT code now can make use of the Java code.</section>
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<section class="example"><div class="tasklabel"><h2 class="sectiontitle tasklabel">Example</h2></div>
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<p class="p">In the following extended example, the <span class="ph filepath">myJavaLibrary.jar</span> file performs a validation step
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during processing, and you want it to run immediately before the <code class="ph codeph">conref </code>step.</p>
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<p class="p">To accomplish this, you will need to use several features:</p>
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<ul class="ul">
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<li class="li">The JAR file must be added to the classpath.</li>
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<li class="li">The Ant target must be added to the dependency chain for conref.</li>
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<li class="li">An Ant target must be created that uses this class, and integrated into the code.</li>
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</ul>
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<p class="p">The files might look like the following:</p>
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<figure class="fig fignone"><figcaption><span class="fig--title-label">Figure 1. </span><span class="ph filepath">plugin.xml</span> file</figcaption>
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<pre class="pre codeblock language-xml normalize-space show-line-numbers show-whitespace"><code><?xml version="1.0" encoding="UTF-8"?>
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<plugin id="com.example.samplejava">
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<em class="ph i"><!-- Add the JAR file to the DITA-OT CLASSPATH --></em>
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<strong class="ph b"><feature extension="dita.conductor.lib.import"
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file="com.example.sampleValidation.jar"/></strong>
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<em class="ph i"><!-- Integrate the Ant code --></em>
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<feature extension="ant.import" file="calljava-antcode.xml"/>
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<em class="ph i"><!-- Define the Ant target to call, and when (before conref) --></em>
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<feature extension="depend.preprocess.conref.pre"
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value="validateWithJava"/>
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</plugin></code></pre>
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</figure>
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<figure class="fig fignone"><figcaption><span class="fig--title-label">Figure 2. </span><span class="ph filepath">calljava-antcode.xml</span> file</figcaption>
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<pre class="pre codeblock language-xml normalize-space show-line-numbers show-whitespace"><code><?xml version="1.0" encoding="UTF-8"?>
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<project default="validateWithJava">
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<target name="validateWithJava">
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<java classname="com.example.sampleValidation">
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<!-- The class was added to the DITA-OT classpath -->
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</java>
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</target>
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</project></code></pre>
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</figure>
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</section>
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</div>
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<nav role="navigation" class="related-links"><div class="familylinks"><div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../topics/plugin-use-cases.html" title="Plug-ins allow you to extend the functionality of DITA-OT. This might entail adding support for specialized document types, integrating processing overrides, or defining new output transformations.">Plug-in use cases</a></div></div><div class="linklist reltasks"><strong>Related tasks</strong><br><ul class="linklist"><li class="linklist"><a class="link" href="../topics/plugins-installing.html" title="Use the dita install subcommand to install plug-ins.">Installing plug-ins</a></li></ul></div><div class="linklist relref"><strong>Related reference</strong><br><ul class="linklist"><li class="linklist"><a class="link" href="../extension-points/plugin-extension-points-general.html" title="These extension points enable you to extend DITA-OT. You can add Ant targets or imports; add a Java library to the classpath parameter; add a new transformation type; extend a catalog file; add new diagnostic messages, and more.">General extension points</a></li></ul></div></nav></article></main></body></html> |