Refactoring: Enably -> IT Mill Toolkit

svn changeset:92/svn branch:toolkit

1 files changed, 319 insertions, 0 deletions

diff --git a/src/com/itmill/toolkit/terminal/web/ServletThemeSource.java b/src/com/itmill/toolkit/terminal/web/ServletThemeSource.java
new file mode 100644
index 0000000000..c2db9c92bd
--- /dev/null
+++ b/src/com/itmill/toolkit/terminal/web/ServletThemeSource.java
@@ -0,0 +1,319 @@
+/* *************************************************************************
+ 
+                               IT Mill Toolkit 
+
+               Development of Browser User Intarfaces Made Easy
+
+                    Copyright (C) 2000-2006 IT Mill Ltd
+                     
+   *************************************************************************
+
+   This product is distributed under commercial license that can be found
+   from the product package on license/license.txt. Use of this product might 
+   require purchasing a commercial license from IT Mill Ltd. For guidelines 
+   on usage, see license/licensing-guidelines.html
+
+   *************************************************************************
+   
+   For more information, contact:
+   
+   IT Mill Ltd                           phone: +358 2 4802 7180
+   Ruukinkatu 2-4                        fax:   +358 2 4802 7181
+   20540, Turku                          email:  info@itmill.com
+   Finland                               company www: www.itmill.com
+   
+   Primary source for information and releases: www.itmill.com
+
+   ********************************************************************** */
+
+
+package com.itmill.toolkit.terminal.web;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.ref.SoftReference;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.Map;
+
+import javax.servlet.ServletContext;
+
+/** Theme source for reading themes from a JAR archive.
+ *  At this time only jar files are supported and an archive
+ *  may not contain any recursive archives.
+ * @author IT Mill Ltd.
+ * @version @VERSION@
+ * @since 3.0
+ */
+public class ServletThemeSource implements ThemeSource {
+
+	private ServletContext context;
+	private Theme theme;
+	private String path;
+	private WebAdapterServlet webAdapterServlet;
+	private Cache resourceCache = new Cache();
+
+	/** Collection of subdirectory entries */
+	private Collection subdirs = new LinkedList();
+	private URL descFile;
+
+	/** Creates a new instance of ThemeRepository by reading the themes
+	 * from a local directory.
+	 * @param file Path to the JAR archive .
+	 * @param path Path inside the archive to be processed.
+	 * @throws FileNotFoundException if no theme files are found
+	 */
+	public ServletThemeSource(
+		ServletContext context,
+		WebAdapterServlet webAdapterServlet,
+		String path)
+		throws IOException, ThemeException {
+
+		this.theme = null;
+		this.webAdapterServlet = webAdapterServlet;
+		this.context = context;
+
+		// Format path
+		this.path = path;
+		if ((this.path.length() > 0) && !this.path.endsWith("/")) {
+			this.path = this.path + "/";
+		}
+		if ((this.path.length() > 0) && !this.path.startsWith("/")) {
+			this.path = "/" +this.path;
+		}
+		
+		// Load description file
+		this.descFile = context.getResource(this.path + Theme.DESCRIPTIONFILE);
+		InputStream entry =
+			context.getResourceAsStream(this.path + Theme.DESCRIPTIONFILE);
+		try {
+			if (entry != null) {
+				try {
+					this.theme = new Theme(entry);
+				} catch (Exception e) {
+					throw new ThemeException(
+						"ServletThemeSource: Failed to load '"
+							+ path
+							+ "': "
+							+ e);
+				}
+				entry.close();
+
+				// Debug info
+				if (webAdapterServlet.isDebugMode()) {
+					Log.debug("Added ServletThemeSource: " + this.path);
+				}
+
+			} else {
+				throw new IllegalArgumentException(
+					"ServletThemeSource: Invalid theme resource: " + path);
+			}
+		} finally {
+			if (entry != null)
+				entry.close();
+		}
+	}
+
+	/**
+	 * @see com.itmill.toolkit.terminal.web.ThemeSource#getXSLStreams(Theme, WebBrowser)
+	 */
+	public Collection getXSLStreams(Theme theme, WebBrowser type)
+		throws ThemeException {
+		Collection xslFiles = new LinkedList();
+
+		// If this directory contains a theme 
+		// return XSL from this theme	
+		if (this.theme != null) {
+
+			if (webAdapterServlet.isDebugMode()) {
+				Log.info("ServletThemeSource: Loading theme: " + theme);
+			}
+
+			// Reload the description file
+			InputStream entry =
+				context.getResourceAsStream(this.path + Theme.DESCRIPTIONFILE);
+			try {
+				if (entry != null) {
+					this.theme = new Theme(entry);
+				}
+			} catch (Exception e) {
+				throw new ThemeException(
+					"ServletThemeSource: Failed to load '" + path + "': " + e);
+			} finally {
+				if (entry != null)
+					try {
+						entry.close();
+					} catch (IOException ignored) {
+					}
+			}
+
+			Collection fileNames = theme.getFileNames(type);
+			// Add all XSL file streams
+			for (Iterator i = fileNames.iterator(); i.hasNext();) {
+				String entryName = (String) i.next();
+				entry =
+					context.getResourceAsStream(
+						(this.path + entryName));
+				xslFiles.add(new XSLStream(entryName,entry));
+			}
+
+		}
+		return xslFiles;
+	}
+
+	/** Return modication time of the description file.
+	 * @see com.itmill.toolkit.terminal.web.ThemeSource#getModificationTime()
+	 */
+	public long getModificationTime() {
+		long modTime = 0;
+		try {
+			URLConnection conn = this.descFile.openConnection();
+			modTime = conn.getLastModified();
+		} catch (Exception ignored) {
+			// In case of exceptions, return zero
+		}
+		return modTime;
+	}
+
+	/**
+	 * @see com.itmill.toolkit.terminal.web.ThemeSource#getResource(String)
+	 */
+	public InputStream getResource(String resourceId)
+		throws ThemeSource.ThemeException {
+
+		// Check the id
+		String name = this.getName();
+		int namelen = name.length();
+		if (resourceId == null
+			|| !resourceId.startsWith(name + "/")
+			|| resourceId.length() <= (namelen + 1)) {
+			return null;
+		}
+
+		// Find the resource
+		String streamName = this.path + resourceId.substring(namelen + 1);
+		InputStream stream = context.getResourceAsStream(streamName);
+		if (stream != null)
+			try {
+
+				// Try cache
+				byte[] data = (byte[]) resourceCache.get(stream);
+				if (data != null)
+					return new ByteArrayInputStream(data);
+
+				// Read data
+				int bufSize = 1024;
+				ByteArrayOutputStream out = new ByteArrayOutputStream(bufSize);
+				byte[] buf = new byte[bufSize];
+				int n = 0;
+				while ((n = stream.read(buf)) >= 0) {
+					out.write(buf, 0, n);
+				}
+				try{
+					stream.close();
+				} catch (IOException ignored){
+				}
+				data = out.toByteArray();
+
+				// Cache data
+				resourceCache.put(stream, data);
+				return new ByteArrayInputStream(data);
+			} catch (IOException e) {
+			}
+
+		throw new ThemeSource.ThemeException(
+			"Resource " + resourceId + " not found.");
+	}
+
+	/**
+	* @see com.itmill.toolkit.terminal.web.ThemeSource#getThemes()
+	*/
+	public Collection getThemes() {
+		Collection themes = new LinkedList();
+		if (this.theme != null) {
+			themes.add(this.theme);
+		}
+		return themes;
+	}
+
+	/**
+	* @see com.itmill.toolkit.terminal.web.ThemeSource#getName()
+	*/
+	public String getName() {
+		return this.theme.getName();
+	}
+
+	/**																											 
+	* @see com.itmill.toolkit.terminal.web.ThemeSource#getThemeByName(String)
+	*/
+	public Theme getThemeByName(String name) {
+		Collection themes = this.getThemes();
+		for (Iterator i = themes.iterator(); i.hasNext();) {
+			Theme t = (Theme) i.next();
+			if (name != null && name.equals(t.getName()))
+				return t;
+		}
+		return null;
+	}
+
+	/**
+	 * @author IT Mill Ltd.
+		 * @version @VERSION@
+		 * @since 3.0
+		 */
+	private class Cache {
+
+		private Map data = new HashMap();
+
+		public void put(Object key, Object value) {
+			data.put(
+				key,
+				new SoftReference(new CacheItem(value, key.toString())));
+		}
+
+		public Object get(Object key) {
+			SoftReference ref = (SoftReference) data.get(key);
+			if (ref != null)
+				return ((CacheItem) ref.get()).getData();
+			return null;
+		}
+
+		public void clear() {
+			data.clear();
+		}
+	}
+
+	/**
+	 * @author IT Mill Ltd.
+	 * @version @VERSION@
+	 * @since 3.0
+	 */
+	private class CacheItem {
+
+		private Object data;
+		private String name;
+
+		public CacheItem(Object data, String name) {
+			this.name = name;
+			this.data = data;
+		}
+
+		public Object getData() {
+			return this.data;
+		};
+
+		public void finalize() throws Throwable {
+			this.data = null;
+			this.name = null;
+			super.finalize();
+		}
+
+	}
+
+}