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Google App Engine compliant variation of FreeMarker. FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

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/*
 * Copyright (c) 2003 The Visigoth Software Society. All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Visigoth Software Society (http://www.visigoths.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
 * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
 *    project contributors may be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
 *    nor may "FreeMarker" or "Visigoth" appear in their names
 *    without prior written permission of the Visigoth Software Society.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Visigoth Software Society. For more
 * information on the Visigoth Software Society, please see
 * http://www.visigoths.org/
 */

package freemarker.template.utility;

import freemarker.template.TemplateTransformModel;
import java.io.*;
import java.util.Map;

/**
 * 

Transformer that supports FreeMarker legacy behavior: all newlines appearing * within the transformed area will be transformed into the platform's default * newline. Unlike the old behavior, however, newlines generated by the data * model are also converted. Legacy behavior was to leave newlines in the * data model unaltered.

* *

Usage:
* From java:

*
 * SimpleHash root = new SimpleHash();
 *
 * root.put( "normalizeNewlines", new freemarker.template.utility.NormalizeNewlines() );
 *
 * ...
 * 
* *

From your FreeMarker template:

*
 * <transform normalizeNewlines>
 *   <html>
 *   <head>
 *   ...
 *   <p>This template has all newlines normalized to the current platform's
 *   default.</p>
 *   ...
 *   </body>
 *   </html>
 * </transform>
 * 
* * * @version $Id: NormalizeNewlines.java,v 1.29 2003/04/11 20:57:32 revusky Exp $ */ public class NormalizeNewlines implements TemplateTransformModel { public Writer getWriter(final Writer out, final Map args) { final StringBuffer buf = new StringBuffer(); return new Writer() { public void write(char cbuf[], int off, int len) { buf.append(cbuf, off, len); } public void flush() throws IOException { out.flush(); } public void close() throws IOException { StringReader sr = new StringReader(buf.toString()); StringWriter sw = new StringWriter(); transform(sr, sw); out.write(sw.toString()); } }; } /** * Performs newline normalization on FreeMarker output. * * @param in the input to be transformed * @param out the destination of the transformation */ public void transform(Reader in, Writer out) throws IOException { BufferedReader br = (in instanceof BufferedReader) ? (BufferedReader) in : new BufferedReader(in); PrintWriter pw = (out instanceof PrintWriter) ? (PrintWriter) out : new PrintWriter(out); String line = br.readLine(); if (line != null) { if ( line.length() > 0 ) { pw.println(line); } } while ((line = br.readLine()) != null) { pw.println(line); } } }




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