patch didn't work properly.

source modifications only applied if class actually missing


git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@115047 13f79535-47bb-0310-9956-ffa450edef68

eclipse/src/plugin-resources/templates/classpath.jelly

@@ -31,11 +31,20 @@
     <maven:makeRelativePath var="srcDir" basedir="${basedir}" path="${pom.build.sourceDirectory}"/>
     <j:set var="excluding" value=""/>
     <j:forEach var="sm" items="${pom.build.sourceModifications}">
-      <j:forEach var="exclude" items="${sm.excludes}">
-        <j:set var="excluding" value="${excluding},${exclude}"/>
-      </j:forEach>
+      <ant:available property="classPresent" classname="${sm.className}"/>
+      <j:if test="${classPresent != 'true'}">
+        <j:forEach var="exclude" items="${sm.excludes}">
+          <j:choose>
+            <j:when test="${excluding.length() == 0}">
+              <j:set var="excluding" value="${exclude}"/>
+            </j:when>
+            <j:otherwise>
+              <j:set var="excluding" value="${excluding},${exclude}"/>
+            </j:otherwise>
+          </j:choose>
+        </j:forEach>
+      </j:if>
     </j:forEach>
-    <j:set var="excluding">${excluding.substring(1)}</j:set> 
     <classpathentry kind="src" path="${srcDir}" excluding="${excluding}" />
   </j:if>