diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/data/FoldingWriter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/data/FoldingWriter.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,155 @@
+/**
+ * Copyright (c) 2012, Ben Fortuna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  o Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ *  o 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.
+ *
+ *  o Neither the name of Ben Fortuna nor the names of any other contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR
+ * 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.
+ */
+package net.fortuna.ical4j.data;
+
+import java.io.FilterWriter;
+import java.io.IOException;
+import java.io.Writer;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * <pre>
+ * $Id$ [Apr 6, 2004]
+ * </pre>
+ *
+ * A writer that performs iCalendar folding as it writes.
+ * @author Ben Fortuna
+ */
+public class FoldingWriter extends FilterWriter {
+
+    /**
+     * reduced to 73 to be consistent with Apple iCal..
+     */
+    public static final int REDUCED_FOLD_LENGTH = 73;
+
+    /**
+     * Lines of text SHOULD NOT be longer than 75 octets, excluding the line break.
+     */
+    public static final int MAX_FOLD_LENGTH = 75;
+
+    private static final char[] FOLD_PATTERN = { '\r', '\n', ' ' };
+
+    private final Log log = LogFactory.getLog(FoldingWriter.class);
+
+    private int lineLength;
+
+    private final int foldLength;
+
+    /**
+     * @param writer a writer to write output to
+     * @param foldLength the maximum line length
+     */
+    public FoldingWriter(final Writer writer, final int foldLength) {
+        super(writer);
+        this.foldLength = Math.min(foldLength, MAX_FOLD_LENGTH);
+    }
+
+    /**
+     * @param writer a writer to write output to
+     */
+    public FoldingWriter(final Writer writer) {
+        this(writer, REDUCED_FOLD_LENGTH);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void write(final int c) throws IOException {
+
+        /*
+         * super.write(c); if (c == '\n') { lineLength = 0; } else { lineLength += 1; } if (lineLength >= FOLD_LENGTH) {
+         * super.write(FOLD_PATTERN); }
+         */
+        write(new char[] { (char) c }, 0, 1);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void write(final char[] buffer, final int offset,
+            final int length) throws IOException {
+        final int maxIndex = offset + length - 1;
+        for (int i = offset; i <= maxIndex; i++) {
+
+            // debugging..
+            if (log.isTraceEnabled()) {
+                log.trace("char [" + buffer[i] + "], line length ["
+                        + lineLength + "]");
+            }
+
+            // check for fold first so we don't unnecessarily fold after
+            // no more data..
+            if (lineLength >= foldLength) {
+                super.write(FOLD_PATTERN, 0, FOLD_PATTERN.length);
+
+                // re-initialise to 1 to account for the space in fold pattern..
+                lineLength = 1;
+            }
+
+            super.write(buffer[i]);
+
+            if (buffer[i] == '\r' || buffer[i] == '\n') {
+                lineLength = 0;
+            }
+            else {
+                lineLength += 1;
+            }
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void write(final String str, final int off, final int len)
+            throws IOException {
+        write(str.toCharArray(), off, len);
+    }
+
+    /*
+     * (non-Javadoc)
+     * @see java.io.FilterWriter#write(java.lang.String, int, int) public void write(String arg0, int arg1, int arg2)
+     * throws IOException { super.write(arg0, arg1, arg2); if (arg0.indexOf('\n') >= 0) { lineLength = 0; } else {
+     * lineLength += 1; } fold(); }
+     */
+
+    /*
+     * (non-Javadoc)
+     * @see java.io.Writer#write(java.lang.String) public void write(String arg0) throws IOException {
+     *  /* if (lineLength +
+     * arg0.length() >= FOLD_LENGTH) { super.write(arg0.substring(0,FOLD_LENGTH-lineLength-1));
+     * super.write(FOLD_PATTERN); super.write(arg0.substring(FOLD_LENGTH-lineLength)); } else { super.write(arg0); } if
+     * (arg0.indexOf('\n') >= 0) { lineLength = 0; } else { lineLength += 1; } fold(); char[] chars =
+     * arg0.toCharArray(); for (int i=0; i <chars.length; i++) { write(chars[i]); } }
+     */
+}