这正是模型到文本(M2T)项目中的JET组件所做的。实际上,您甚至可以使用JET创建项目,.classpath和任何其他需要的文件。
Jet模板如下。请注意,这些模板必须完全按照所示进行命名。
/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();
}
}
,并利用该模型:
<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>
给人命名包含三个Java文件com.lacqui.commands一个完整的Java项目:
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();
}
}
这:
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();
}
}
你为什么不只是编写一个批处理文件/ shell脚本来完成这一切的吗?一行两个参数 - >完成!我这样问是因为我个人不知道你会如何(如果可能的话)在eclipse中做这件事,而且看起来你在这里很容易使用。 – thatidiotguy 2012-08-10 15:32:33
我希望它成为构建过程的一部分,以便如果我更改我的模板或XML,它将重新生成 – 2012-08-10 18:18:26
@thatidiotguy您可以将ant脚本作为项目属性的一部分集成到构建过程中,它位于“构建器”下。我不知道是否有批处理/ shell脚本支持,但我也没有看过。 – 2012-08-15 17:07:12