File	Doc	Category	Size	Date	Package
EncodingInfo.java	API Doc	Java SE 6 API	10844	Tue Jun 10 00:23:06 BST 2008	com.sun.org.apache.xml.internal.serialize

EncodingInfo

• java.lang.Object

Fields Summary
private Object[]	fArgsForMethod
String	ianaName
String	javaName
int	lastPrintable
Object	fCharsetEncoder
Object	fCharToByteConverter
boolean	fHaveTriedCToB
boolean	fHaveTriedCharsetEncoder

Constructors Summary
public EncodingInfo(String ianaName, String javaName, int lastPrintable) Creates new EncodingInfo instance. this.ianaName = ianaName; this.javaName = EncodingMap.getIANA2JavaMapping(ianaName); this.lastPrintable = lastPrintable;

Methods Summary
public java.lang.String	getIANAName() Returns a MIME charset name of this encoding. return this.ianaName;
public java.io.Writer	getWriter(java.io.OutputStream output) Returns a writer for this encoding based on an output stream. return A suitable writer exception UnsupportedEncodingException There is no convertor to support this encoding // this should always be true! if (javaName != null) return new OutputStreamWriter(output, javaName); javaName = EncodingMap.getIANA2JavaMapping(ianaName); if(javaName == null) // use UTF-8 as preferred encoding return new OutputStreamWriter(output, "UTF8"); return new OutputStreamWriter(output, javaName);
public boolean	isPrintable(char ch) Checks whether the specified character is printable or not in this encoding. param ch a code point (0-0x10ffff) if (ch <= this.lastPrintable) { return true; } return isPrintable0(ch);
private boolean	isPrintable0(char ch) Checks whether the specified character is printable or not in this encoding. This method accomplishes this using a java.nio.CharsetEncoder. If NIO isn't available it will attempt use a sun.io.CharToByteConverter. param ch a code point (0-0x10ffff) // Attempt to get a CharsetEncoder for this encoding. if (fCharsetEncoder == null && CharsetMethods.fgNIOCharsetAvailable && !fHaveTriedCharsetEncoder) { if (fArgsForMethod == null) { fArgsForMethod = new Object [1]; } // try and create the CharsetEncoder try { fArgsForMethod[0] = javaName; Object charset = CharsetMethods.fgCharsetForNameMethod.invoke(null, fArgsForMethod); if (((Boolean) CharsetMethods.fgCharsetCanEncodeMethod.invoke(charset, (Object[]) null)).booleanValue()) { fCharsetEncoder = CharsetMethods.fgCharsetNewEncoderMethod.invoke(charset, (Object[]) null); } // This charset cannot be used for encoding, don't try it again... else { fHaveTriedCharsetEncoder = true; } } catch (Exception e) { // don't try it again... fHaveTriedCharsetEncoder = true; } } // Attempt to use the CharsetEncoder to determine whether the character is printable. if (fCharsetEncoder != null) { try { fArgsForMethod[0] = new Character(ch); return ((Boolean) CharsetMethods.fgCharsetEncoderCanEncodeMethod.invoke(fCharsetEncoder, fArgsForMethod)).booleanValue(); } catch (Exception e) { // obviously can't use this charset encoder; possibly a JDK bug fCharsetEncoder = null; fHaveTriedCharsetEncoder = false; } } // As a last resort try to use a sun.io.CharToByteConverter to // determine whether this character is printable. We will always // reach here on JDK 1.3 or below. if (fCharToByteConverter == null) { if (fHaveTriedCToB || !CharToByteConverterMethods.fgConvertersAvailable) { // forget it; nothing we can do... return false; } if (fArgsForMethod == null) { fArgsForMethod = new Object [1]; } // try and create the CharToByteConverter try { fArgsForMethod[0] = javaName; fCharToByteConverter = CharToByteConverterMethods.fgGetConverterMethod.invoke(null, fArgsForMethod); } catch (Exception e) { // don't try it again... fHaveTriedCToB = true; return false; } } try { fArgsForMethod[0] = new Character(ch); return ((Boolean) CharToByteConverterMethods.fgCanConvertMethod.invoke(fCharToByteConverter, fArgsForMethod)).booleanValue(); } catch (Exception e) { // obviously can't use this converter; probably some kind of // security restriction fCharToByteConverter = null; fHaveTriedCToB = false; return false; }
public static void	testJavaEncodingName(java.lang.String name) final byte [] bTest = {(byte)'v", (byte)'a", (byte)'l", (byte)'i", (byte)'d"}; String s = new String(bTest, name);