1.1 --- a/src/net/fortuna/ical4j/data/FoldingWriter.java Thu Feb 12 18:02:00 2015 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,155 +0,0 @@
1.4 -/**
1.5 - * Copyright (c) 2012, Ben Fortuna
1.6 - * All rights reserved.
1.7 - *
1.8 - * Redistribution and use in source and binary forms, with or without
1.9 - * modification, are permitted provided that the following conditions
1.10 - * are met:
1.11 - *
1.12 - * o Redistributions of source code must retain the above copyright
1.13 - * notice, this list of conditions and the following disclaimer.
1.14 - *
1.15 - * o Redistributions in binary form must reproduce the above copyright
1.16 - * notice, this list of conditions and the following disclaimer in the
1.17 - * documentation and/or other materials provided with the distribution.
1.18 - *
1.19 - * o Neither the name of Ben Fortuna nor the names of any other contributors
1.20 - * may be used to endorse or promote products derived from this software
1.21 - * without specific prior written permission.
1.22 - *
1.23 - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.25 - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.26 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.27 - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.28 - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.29 - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.30 - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.31 - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.32 - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.33 - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.34 - */
1.35 -package net.fortuna.ical4j.data;
1.36 -
1.37 -import java.io.FilterWriter;
1.38 -import java.io.IOException;
1.39 -import java.io.Writer;
1.40 -
1.41 -import org.apache.commons.logging.Log;
1.42 -import org.apache.commons.logging.LogFactory;
1.43 -
1.44 -/**
1.45 - * <pre>
1.46 - * $Id$ [Apr 6, 2004]
1.47 - * </pre>
1.48 - *
1.49 - * A writer that performs iCalendar folding as it writes.
1.50 - * @author Ben Fortuna
1.51 - */
1.52 -public class FoldingWriter extends FilterWriter {
1.53 -
1.54 - /**
1.55 - * reduced to 73 to be consistent with Apple iCal..
1.56 - */
1.57 - public static final int REDUCED_FOLD_LENGTH = 73;
1.58 -
1.59 - /**
1.60 - * Lines of text SHOULD NOT be longer than 75 octets, excluding the line break.
1.61 - */
1.62 - public static final int MAX_FOLD_LENGTH = 75;
1.63 -
1.64 - private static final char[] FOLD_PATTERN = { '\r', '\n', ' ' };
1.65 -
1.66 - private final Log log = LogFactory.getLog(FoldingWriter.class);
1.67 -
1.68 - private int lineLength;
1.69 -
1.70 - private final int foldLength;
1.71 -
1.72 - /**
1.73 - * @param writer a writer to write output to
1.74 - * @param foldLength the maximum line length
1.75 - */
1.76 - public FoldingWriter(final Writer writer, final int foldLength) {
1.77 - super(writer);
1.78 - this.foldLength = Math.min(foldLength, MAX_FOLD_LENGTH);
1.79 - }
1.80 -
1.81 - /**
1.82 - * @param writer a writer to write output to
1.83 - */
1.84 - public FoldingWriter(final Writer writer) {
1.85 - this(writer, REDUCED_FOLD_LENGTH);
1.86 - }
1.87 -
1.88 - /**
1.89 - * {@inheritDoc}
1.90 - */
1.91 - public final void write(final int c) throws IOException {
1.92 -
1.93 - /*
1.94 - * super.write(c); if (c == '\n') { lineLength = 0; } else { lineLength += 1; } if (lineLength >= FOLD_LENGTH) {
1.95 - * super.write(FOLD_PATTERN); }
1.96 - */
1.97 - write(new char[] { (char) c }, 0, 1);
1.98 - }
1.99 -
1.100 - /**
1.101 - * {@inheritDoc}
1.102 - */
1.103 - public final void write(final char[] buffer, final int offset,
1.104 - final int length) throws IOException {
1.105 - final int maxIndex = offset + length - 1;
1.106 - for (int i = offset; i <= maxIndex; i++) {
1.107 -
1.108 - // debugging..
1.109 - if (log.isTraceEnabled()) {
1.110 - log.trace("char [" + buffer[i] + "], line length ["
1.111 - + lineLength + "]");
1.112 - }
1.113 -
1.114 - // check for fold first so we don't unnecessarily fold after
1.115 - // no more data..
1.116 - if (lineLength >= foldLength) {
1.117 - super.write(FOLD_PATTERN, 0, FOLD_PATTERN.length);
1.118 -
1.119 - // re-initialise to 1 to account for the space in fold pattern..
1.120 - lineLength = 1;
1.121 - }
1.122 -
1.123 - super.write(buffer[i]);
1.124 -
1.125 - if (buffer[i] == '\r' || buffer[i] == '\n') {
1.126 - lineLength = 0;
1.127 - }
1.128 - else {
1.129 - lineLength += 1;
1.130 - }
1.131 - }
1.132 - }
1.133 -
1.134 - /**
1.135 - * {@inheritDoc}
1.136 - */
1.137 - public final void write(final String str, final int off, final int len)
1.138 - throws IOException {
1.139 - write(str.toCharArray(), off, len);
1.140 - }
1.141 -
1.142 - /*
1.143 - * (non-Javadoc)
1.144 - * @see java.io.FilterWriter#write(java.lang.String, int, int) public void write(String arg0, int arg1, int arg2)
1.145 - * throws IOException { super.write(arg0, arg1, arg2); if (arg0.indexOf('\n') >= 0) { lineLength = 0; } else {
1.146 - * lineLength += 1; } fold(); }
1.147 - */
1.148 -
1.149 - /*
1.150 - * (non-Javadoc)
1.151 - * @see java.io.Writer#write(java.lang.String) public void write(String arg0) throws IOException {
1.152 - * /* if (lineLength +
1.153 - * arg0.length() >= FOLD_LENGTH) { super.write(arg0.substring(0,FOLD_LENGTH-lineLength-1));
1.154 - * super.write(FOLD_PATTERN); super.write(arg0.substring(FOLD_LENGTH-lineLength)); } else { super.write(arg0); } if
1.155 - * (arg0.indexOf('\n') >= 0) { lineLength = 0; } else { lineLength += 1; } fold(); char[] chars =
1.156 - * arg0.toCharArray(); for (int i=0; i <chars.length; i++) { write(chars[i]); } }
1.157 - */
1.158 -}
