这正是模型到文本（M2T）项目中的JET组件的用途。实际上，您甚至可以使用JET创建项目，.classpath以及所需的任何其他文件。
Jet模板如下。请注意，这些模板必须完全按照所示命名。
/templates/main.jet
<%@taglib prefix="ws" id="org.eclipse.jet.workspaceTags" %><%-- Main entry point for com.lacqui.command.xform --%><%-- Let c:iterate tags set the XPath context object. For 100% compatibility with JET 0.9.x or earlier, remove this statement --%><c:setVariable var="org.eclipse.jet.taglib.control.iterateSetsContext" select="true()"/> <c:setVariable select="/command-list" var="command-list" /> --- traverse input model, performing calculations and storing --- the results as model annotations via c:set tag <c:set select="$command-list" name="project">com.lacqui.commands</c:set> <c:set select="$command-list" name="commandPkg">com.lacqui.commands</c:set> <c:set select="$command-list" name="commandDir"><c:get select="translate($command-list/@commandPkg,'.','/')" /></c:set> <c:iterate select="$command-list/command" var="command" > - Derive the class name from the name of the command <c:set select="$command" name="classname"><c:get select="camelCase($command/@name)" />Command</c:set> <c:iterate select="$command/argument" var="argument"> <c:if test="not($argument/@optional)"> <c:set select="$argument" name="optional">false</c:set> </c:if> </c:iterate> </c:iterate> --- traverse annotated model, performing text generation actions --- such as ws:file, ws:folder and ws:project <ws:project name="{$command-list/@project}" /> <ws:file template="templates/project.jet" path="{$command-list/@project}/.project" /> <ws:file template="templates/classpath.jet" path="{$command-list/@project}/.classpath"/> <c:iterate select="$command-list/command" var="command" > <ws:file template="templates/class.jet" path="{$command-list/@project}/src/{$command-list/@commandDir}/{$command/@classname}.java" replace="true"/> </c:iterate>/templates/classpath.jet
<?xml version="1.0" encoding="UTF-8"?><classpath> <classpathentry kind="src" path="src"/> <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/> <classpathentry kind="output" path="bin"/></classpath>
/templates/project.jet
<?xml version="1.0" encoding="UTF-8"?><projectDescription> <name><c:get select="$command-list/@project" /></name> <comment></comment> <projects> </projects> <buildSpec> <buildCommand> <name>org.eclipse.jdt.core.javabuilder</name> <arguments> </arguments> </buildCommand> </buildSpec> <natures> <nature>org.eclipse.jdt.core.javanature</nature> </natures></projectDescription>
/templates/class.jet
package <c:get select="$command-list/@commandPkg" />;public class <c:get select="$command/@classname" /> extends Command { public ResponseCode execute() { Server srv = getServer();<c:iterate select="$command/capability" var="capability"> if (srv.hasCapability(Capabilities.<c:get select="$capability/@name"/>) == false) { Log.debug("Attempting non-available capability: <c:get select="$capability/@name"/>"); }</c:iterate> <c:iterate select="$command/argument" var="argument"> String <c:get select="$argument/@name"/> = getArgument("<c:get select="$argument/@name"/>");<c:if test="$argument/@optional = 'false'" > if (<c:get select="$argument/@name"/> == null) { throw new InvalidArgumentException("Require <c:get select="$argument/@name"/>"); }</c:if></c:iterate> String command = "GROUP";<c:iterate select="$command/argument" var="argument"> if (<c:get select="$argument/@name"/> != null) command += " -<c:get select="$argument/@name"/> " + <c:get select="$argument/@name"/>;</c:iterate> srv.send(command); return srv.getResponse(); }}并使用此模型：
<command-list> <command name="DATE" /> <command name="GROUP"> <capability name="LOGGER" /> <capability name="AUTHENTICATOR" /> <argument name="groupname" /> </command> <command name="ARTICLE"> <capability name="READER" /> <argument name="article-id" optional="false" /> <argument name="message-id" optional="true" /> </command></command-list>
提供了一个完整的Java项目com.lacqui.commands，其中包含三个Java文件：
package com.lacqui.commands;public class ArticleCommand extends Command { public ResponseCode execute() { Server srv = getServer(); if (srv.hasCapability(Capabilities.READER) == false) { Log.debug("Attempting non-available capability: READER"); } String article-id = getArgument("article-id"); if (article-id == null) { throw new InvalidArgumentException("Require article-id"); } String message-id = getArgument("message-id"); String command = "GROUP"; if (article-id != null) command += " -article-id " + article-id; if (message-id != null) command += " -message-id " + message-id; srv.send(command); return srv.getResponse(); }}还有这个：
package com.lacqui.commands;public class GroupCommand extends Command { public ResponseCode execute() { Server srv = getServer(); if (srv.hasCapability(Capabilities.LOGGER) == false) { Log.debug("Attempting non-available capability: LOGGER"); } if (srv.hasCapability(Capabilities.AUTHENTICATOR) == false) { Log.debug("Attempting non-available capability: AUTHENTICATOR"); } String groupname = getArgument("groupname"); if (groupname == null) { throw new InvalidArgumentException("Require groupname"); } String command = "GROUP"; if (groupname != null) command += " -groupname " + groupname; srv.send(command); return srv.getResponse(); }}
