From: Jani Laakso <jani.laakso@itmill.com>
Date: Thu, 5 Apr 2007 12:44:01 +0000 (+0000)
Subject: Sample directory helper class.
X-Git-Tag: 6.7.0.beta1~6462
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=215211a582e7321d9a8c64d6e21b83e1e0574a4c;p=vaadin-framework.git

Sample directory helper class.


svn changeset:1170/svn branch:trunk
---

diff --git a/src/com/itmill/toolkit/demo/util/SampleDirectory.java b/src/com/itmill/toolkit/demo/util/SampleDirectory.java
new file mode 100644
index 0000000000..95faf970c8
--- /dev/null
+++ b/src/com/itmill/toolkit/demo/util/SampleDirectory.java
@@ -0,0 +1,69 @@
+package com.itmill.toolkit.demo.util;
+
+import java.io.File;
+
+import com.itmill.toolkit.Application;
+import com.itmill.toolkit.terminal.SystemError;
+import com.itmill.toolkit.ui.Label;
+import com.itmill.toolkit.ui.Panel;
+
+/**
+ * Provides sample directory based on application directory. If this fails then
+ * sampleDirectory property is read. If no sample directory is resolved, then a
+ * panel displaying error message is added to main window.
+ * 
+ * @author IT Mill Ltd.
+ * 
+ */
+public class SampleDirectory {
+
+	/**
+	 * Get sample directory.
+	 * 
+	 * @param application
+	 * @return file pointing to sample directory
+	 */
+	public static File getDirectory(Application application) {
+		String errorMessage = "Access to application "
+				+ "context base directory failed, "
+				+ "possible security constraint with Application "
+				+ "Server or Servlet Container.<br />";
+		File file = application.getContext().getBaseDirectory();
+		if ((file == null) || (!file.canRead())
+				|| (file.getAbsolutePath() == null)) {
+			// cannot access example directory, possible security issue with
+			// Application Server or Servlet Container
+			// Try to read sample directory from web.xml parameter
+			if (application.getProperty("sampleDirectory") != null) {
+				file = new File(application.getProperty("sampleDirectory"));
+				if ((file != null) && (file.canRead())
+						&& (file.getAbsolutePath() != null)) {
+					// Success using property
+					return file;
+				}
+				// Failure using property
+				errorMessage += "Failed also to access sample directory <b>["
+						+ application.getProperty("sampleDirectory")
+						+ "]</b> defined in <b>sampleDirectory property</b>.";
+			} else {
+				// Failure using application context base dir, no property set
+				errorMessage += "<b>Note: </b>You can set this manually in "
+						+ "web.xml by defining " + "sampleDirectory property.";
+			}
+		} else {
+			// Success using application context base dir
+			return file;
+		}
+		// Add failure notification as an Panel to main window
+		Panel errorPanel = new Panel("Demo application error");
+		errorPanel.setStyle("strong");
+		errorPanel.setComponentError(new SystemError(
+				"Cannot provide sample directory"));
+		errorPanel.addComponent(new Label(errorMessage, Label.CONTENT_XHTML));
+		// Remove all components from applications main window
+		application.getMainWindow().getLayout().removeAllComponents();
+		// Add error panel
+		application.getMainWindow().getLayout().addComponent(errorPanel);
+		return null;
+	}
+}