File	Doc	Category	Size	Date	Package
EncodingInfo.java	API Doc	Java SE 5 API	8558	Fri Aug 26 14:56:02 BST 2005	com.sun.org.apache.xml.internal.serialize

EncodingInfo

• java.lang.Object

Fields Summary
private static Method	fgGetConverterMethod
private static Method	fgCanConvertMethod
private static boolean	fgConvertersAvailable
private Object[]	fArgsForMethod
String	ianaName
String	javaName
int	lastPrintable
Object	fCharToByteConverter
boolean	fHaveTriedCToB
Charset	nioCharset
CharsetEncoder	nioCharEncoder

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; try{ nioCharset = Charset.forName(this.javaName); if(nioCharset.canEncode()) nioCharEncoder = nioCharset.newEncoder(); }catch(IllegalCharsetNameException ie){ nioCharset = null; nioCharEncoder = null; }catch(UnsupportedCharsetException ue){ nioCharset = null; nioCharEncoder = null; }

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; if(nioCharEncoder != null) return nioCharEncoder.canEncode(ch); //We should not reach here , if we reach due to //charset not supporting encoding then fgConvertersAvailable //should take care of returning false. if(fCharToByteConverter == null) { if(fHaveTriedCToB || !fgConvertersAvailable) { // forget it; nothing we can do... return false; } if (fArgsForMethod == null) { fArgsForMethod = new Object [1]; } // try and create it: try { fArgsForMethod[0] = javaName; fCharToByteConverter = fgGetConverterMethod.invoke(null, fArgsForMethod); } catch(Exception e) { // don't try it again... fHaveTriedCToB = true; return false; } } try { fArgsForMethod[0] = new Character(ch); return ((Boolean) 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);