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 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package com.sun.codemodel.internal.util;

import java.io.FilterWriter;
import java.io.IOException;
import java.io.Writer;

Writer that escapes characters that are unsafe as Javadoc comments. Such characters include '<' and '&'. 
 Note that this class doesn't escape other Unicode characters that are typically unsafe. For example, &#x611B; (A kanji that means "love") can be considered as unsafe because javac with English Windows cannot accept this character in the source code. 

If the application needs to escape such characters as well, then
they are on their own.
Author:

     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)/**
 * {@link Writer} that escapes characters that are unsafe
 * as Javadoc comments.
 *
 * Such characters include '&lt;' and '&amp;'.
 *
 * <p>
 * Note that this class doesn't escape other Unicode characters
 * that are typically unsafe. For example, {@literal &#x611B;} (A kanji
 * that means "love") can be considered as unsafe because
 * javac with English Windows cannot accept this character in the
 * source code.
 *
 * <p>
 * If the application needs to escape such characters as well, then
 * they are on their own.
 *
 * @author
 *      Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public class JavadocEscapeWriter extends FilterWriter {

    public JavadocEscapeWriter( Writer next ) {
        super(next);
    }

    public void write(int ch) throws IOException {
        if(ch=='<')
            out.write("&lt;");
        else
        if(ch=='&')
            out.write("&amp;");
        else
        if(ch=='>')
            out.write("&gt;");
        else
            out.write(ch);
    }

    public void write(char[] buf, int off, int len) throws IOException {
        for( int i=0; i<len; i++ )
            write(buf[off+i]);
    }

    public void write(char[] buf) throws IOException {
        write(buf,0,buf.length);
    }

    public void write(String buf, int off, int len) throws IOException {
        write( buf.toCharArray(), off, len );
    }

    public void write(String buf) throws IOException {
        write( buf.toCharArray(), 0, buf.length() );
    }

}