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package com.sun.xml.bind.marshaller;
import java.io.IOException;
import java.io.Writer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
/**
* Uses JDK1.4 NIO functionality to escape characters smartly.
*
* @since 1.0.1
* @author
* Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
*/
public class NioEscapeHandler implements CharacterEscapeHandler {
private final CharsetEncoder encoder;
// exposing those variations upset javac 1.3.1, since it needs to
// know about those classes to determine which overloaded version
// of the method it wants to use. So comment it out for the compatibility.
// public NioEscapeHandler(CharsetEncoder _encoder) {
// this.encoder = _encoder;
// if(encoder==null)
// throw new NullPointerException();
// }
//
// public NioEscapeHandler(Charset charset) {
// this(charset.newEncoder());
// }
public NioEscapeHandler(String charsetName) {
// this(Charset.forName(charsetName));
this.encoder = Charset.forName(charsetName).newEncoder();
}
public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out) throws IOException {
int limit = start+length;
for (int i = start; i < limit; i++) {
switch (ch[i]) {
case '&':
out.write("&");
break;
case '<':
out.write("<");
break;
case '>':
out.write(">");
break;
case '\"':
if (isAttVal) {
out.write(""");
} else {
out.write('\"');
}
break;
default:
if( encoder.canEncode(ch[i]) ) {
out.write(ch[i]);
} else {
out.write("&#");
out.write(Integer.toString(ch[i]));
out.write(';');
}
}
}
}
}