SWF-513

conversion utility that invokes the xsl

spring-webflow/src/main/java/org/springframework/webflow/engine/model/builder/xml/WebFlowUpgrader.java

@@ -0,0 +1,65 @@
+package org.springframework.webflow.engine.model.builder.xml;
+
+import java.io.IOException;
+import java.io.StringWriter;
+
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
+
+import com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory;
+
+public class WebFlowUpgrader {
+
+	private static final String XSL_NAME = "spring-webflow-1.0-to-2.0.xsl";
+	private Transformer transformer;
+
+	public static void main(String[] args) {
+		if (args.length < 1) {
+			System.err.println("The name of the file to convert is required");
+			System.exit(-1);
+		}
+		WebFlowUpgrader converter = new WebFlowUpgrader();
+		String result = converter.convert(new FileSystemResource(args[0]));
+		System.out.println(result);
+	}
+
+	public String convert(Resource flowResource) {
+		StringWriter output = new StringWriter();
+		try {
+			Source source = new StreamSource(flowResource.getInputStream());
+			Result result = new StreamResult(output);
+			transform(source, result);
+		} catch (TransformerException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return output.toString();
+	}
+
+	public synchronized void transform(Source source, Result result) throws TransformerConfigurationException,
+			TransformerException, IOException {
+		getTransformer().transform(source, result);
+	}
+
+	private Transformer getTransformer() throws TransformerConfigurationException, IOException {
+		if (transformer == null) {
+			Resource xslResource = new ClassPathResource(XSL_NAME, getClass());
+			TransformerFactory factory = TransformerFactory.newInstance();
+			Source source = new StreamSource(xslResource.getInputStream());
+			transformer = factory.newTransformer(source);
+			transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");
+		}
+		return transformer;
+	}
+}