Merge pull request #93 from xtext/cd_fixDeps

implemented FilteringClassLoader.getResource to ensure isolation between plugin and build classloader

Author: oehme

xtext-gradle-plugin/src/main/java/org/xtext/gradle/tasks/internal/FilteringClassLoader.xtend

@@ -3,11 +3,17 @@ package org.xtext.gradle.tasks.internal
 import java.util.List
 
 class FilteringClassLoader extends ClassLoader {
+	
+	static val char DOT = '.'
+	static val char SLASH = '/'
+	
 	val List<String> includes
+	val List<String> resourceIncludes
 
 	new(ClassLoader parent, List<String> includes) {
 		super(parent)
 		this.includes = includes
+		this.resourceIncludes = includes.map[replace(DOT,SLASH)]
 	}
 
 	override loadClass(String name, boolean resolve) throws ClassNotFoundException {
@@ -27,8 +33,23 @@ class FilteringClassLoader extends ClassLoader {
 		}
 	}
 
+	override getResource(String name) {
+		val result = ClassLoader.systemClassLoader.parent?.getResource(name)
+		if (result !== null) {
+			return result
+		}
+		if (name.isValidResource) {
+			return super.getResource(name)
+		}
+		return null
+	}
+
 	private def isValidClass(String name) {
-		includes.exists[name.startsWith(it + ".")]
+		includes.exists[name.startsWith(it + DOT)]
+	}
+	
+	private def isValidResource(String name) {
+		resourceIncludes.exists[name.startsWith(it + SLASH)]
 	}
 
 }