JHotDraw的IO问题

您好！请教一个问题：jhotdraw7.6中samples中draw实例中有个file菜单中有个“open”的功能，可以根据xml文件生成图形，请问这个功能的代码在哪儿？谢谢

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你好，我用的是7.5的版本，我想应该是一样的。

实现机制：
draw的存储接口是DOMStorable，负责drawing的IO操作；所有继承或实现该接口的子类都必须实现了read和write方法，即实现具体类的读入和写出责任。AbstractAttributedFigure和Drawing都继承该接口。

读取文件的顺序为：

openAction读入文件，调用DrawView的read方法读取该文件；DrawView中维护多个inputFormat，每个inputFormat负责读取特定的Figure；当调用read方法时，DrawView尝试让所有的inputFormat读取该文件，但只要有一个inputFormat读取成功就停止。

至于DrawView装载了多少InputFromat，可以参考org.jhotdraw.samples.draw.DrawView.createDrawing()：

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- <a>
- <fontFace>
  <font id="1" name="宋体" style="0" size="20" /> 
  </fontFace>
- <fontSize>
  <double id="2">20.0</double> 
  </fontSize>
  </a>
  <transition name="到拟稿" to="拟稿" /> 
  </start-state>
- <task-node id="3" x="42" y="148" w="60" h="40" name="拟稿">
- <a>
- <text>
  <string id="4">拟稿</string> 
  </text>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="到审批" to="审批" /> 
- <task name="拟稿">
  <description>draft</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  </task-node>
- <task-node id="5" x="40" y="238" w="60" h="40" name="审批">
- <a>
- <text>
  <string id="6">审批</string> 
  </text>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="到判断" to="判断" /> 
- <task name="审批">
  <description>examine</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  </task-node>
- <task-node id="7" x="40" y="346" w="60" h="40" name="成文">
- <a>
- <text>
  <string id="8">成文</string> 
  </text>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="到传阅" to="传阅" /> 
- <task name="成文">
  <description>write</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  </task-node>
- <task-node id="9" x="187" y="344" w="60" h="40" name="传阅">
- <a>
- <text>
  <string id="a">传阅</string> 
  </text>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="到归档" to="归档" /> 
- <task name="传阅">
  <description>read</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  </task-node>
- <decision id="b" x="179" y="232" w="60" h="40" name="判断">
- <a>
- <fillColor>
  <color id="c" rgba="#ffffff00" /> 
  </fillColor>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="同意" to="成文" /> 
  <transition name="不同意" to="拟稿" /> 
  <handler /> 
  </decision>
- <end-state id="d" x="462" y="337" w="60" h="40" name="结束">
- <a>
- <fillColor>
  <color id="e" rgba="#ffff0000" /> 
  </fillColor>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  </end-state>
- <task-node id="f" x="313" y="343" w="60" h="40" name="归档">
- <a>
- <text>
  <string id="10">归档</string> 
  </text>
- <fontFace>
  <font ref="1" /> 
  </fontFace>
- <fontSize>
  <double ref="2" /> 
  </fontSize>
  </a>
  <transition name="到结束" to="结束" /> 
- <task name="归档">
  <description>file</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  </task-node>
- <transition id="11">
- <points>
  <p colinear="true" x="70.41414141414141" y="89.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="71.58585858585859" y="147.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="12">
- <Owner>
  <start-state ref="0" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="13">
- <Owner>
  <task-node ref="3" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color id="14" rgba="#ff000000" /> 
  </strokeColor>
- <strokeWidth>
  <double id="15">1.0</double> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="16">
- <points>
  <p colinear="true" x="71.54444444444445" y="188.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="70.45555555555555" y="237.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="17">
- <Owner>
  <task-node ref="3" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="18">
- <Owner>
  <task-node ref="5" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="19">
- <points>
  <p colinear="true" x="100.5" y="256.68345323741005" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="178.5" y="253.31654676258992" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="1a">
- <Owner>
  <task-node ref="5" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="1b">
- <Owner>
  <decision ref="b" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="1c">
- <points>
  <p colinear="true" x="178.5" y="233.2992700729927" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="102.5" y="186.7007299270073" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="1d">
- <Owner>
  <decision ref="b" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="1e">
- <Owner>
  <task-node ref="3" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="1f">
- <points>
  <p colinear="true" x="184.00438596491227" y="272.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="94.99561403508773" y="345.5" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="20">
- <Owner>
  <decision ref="b" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="21">
- <Owner>
  <task-node ref="7" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="22">
- <points>
  <p colinear="true" x="100.5" y="365.5850340136054" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="186.5" y="364.4149659863946" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="23">
- <Owner>
  <task-node ref="7" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="24">
- <Owner>
  <task-node ref="9" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="25">
- <points>
  <p colinear="true" x="247.5" y="363.7579365079365" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="312.5" y="363.2420634920635" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="26">
- <Owner>
  <task-node ref="9" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="27">
- <Owner>
  <task-node ref="f" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
- <transition id="28">
- <points>
  <p colinear="true" x="373.5" y="361.7718120805369" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  <p colinear="true" x="461.5" y="358.2281879194631" c1x="0" c1y="0" c2x="0" c2y="0" /> 
  </points>
- <startConnector>
- <rConnector id="29">
- <Owner>
  <task-node ref="f" /> 
  </Owner>
  </rConnector>
  </startConnector>
- <endConnector>
- <rConnector id="2a">
- <Owner>
  <end-state ref="d" /> 
  </Owner>
  </rConnector>
  </endConnector>
- <a>
- <strokeColor>
  <color ref="14" /> 
  </strokeColor>
- <strokeWidth>
  <double ref="15" /> 
  </strokeWidth>
  </a>
  </transition>
  </figures>
  </drawing>

修改成文一下形式的xml文件
  <?xml version="1.0" encoding="UTF-8" ?> 
- <process-definition xmlns="" name="document">
- <start-state name="开始">
  <transition to="拟稿" /> 
  </start-state>
- <task-node name="拟稿">
- <task name="拟稿">
  <description>draft</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  <transition to="审批" /> 
  </task-node>
- <task-node name="归档">
- <task name="归档">
  <description>file</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  <transition to="结束" /> 
  </task-node>
- <task-node name="传阅">
- <task name="传阅">
  <description>read</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  <transition to="归档" /> 
  </task-node>
- <task-node name="成文">
- <task name="成文">
  <description>write</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  <transition to="传阅" /> 
  </task-node>
- <task-node name="审批">
- <task name="审批">
  <description>examine</description> 
  <assignment /> 
- <controller>
  <variable access="read,write" name="documentId" /> 
  </controller>
  </task>
  <transition to="判断" /> 
  </task-node>
- <decision name="判断">
  <handler /> 
  <transition to="成文" name="同意" /> 
  <transition to="拟稿" name="不同意" /> 
  </decision>
  <end-state name="结束" /> 
  </process-definition>

请问需要修改哪些文件啊？  
我也在整，不过过程中还有不少的问题