Revert "Remove unintended changes from last commit"

This reverts commit 1ba806b185.

spring-webmvc/src/main/java/org/springframework/web/servlet/resource/LessResourceTransformer.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2002-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.web.servlet.resource;
+
+import java.io.IOException;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.lesscss.LessCompiler;
+import org.lesscss.LessException;
+import org.springframework.core.io.Resource;
+import org.springframework.util.StringUtils;
+
+
+/**
+ *
+ * @author Jeremy Grelle
+ * @since 4.0
+ */
+public class LessResourceTransformer implements ResourceTransformer {
+
+	private static final String LESS_EXT = "less";
+
+	private final LessCompiler compiler = new LessCompiler();
+
+
+	@Override
+	public Resource transform(Resource original) throws IOException {
+		TransformedResource transformed;
+		try {
+			String content = "";
+			if (original instanceof TransformedResource) {
+				content = ((TransformedResource) original).getContentAsString();
+			}
+			else {
+				content = this.compiler.compile(original.getFile());
+			}
+			transformed = new TransformedResource(original.getFilename().replace(
+					"." + LESS_EXT, ""), content.getBytes("UTF-8"), original.lastModified());
+		}
+		catch (LessException ex) {
+			//TODO - Nicely print out the compilation error
+			ex.printStackTrace();
+			return null;
+		}
+		return transformed;
+	}
+
+	@Override
+	public boolean willTransform(HttpServletRequest request, Resource original) {
+		return LESS_EXT.equals(StringUtils.getFilenameExtension(original.getFilename()));
+	}
+
+}