/*
*******************************************************************************
* Copyright (C) 2003-2008, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package com.ibm.icu.dev.test.stringprep;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.MissingResourceException;
import com.ibm.icu.text.StringPrepParseException;
import com.ibm.icu.text.StringPrep;
import com.ibm.icu.text.UCharacterIterator;
/**
* @author ram
*
* This is a dumb implementation of NFS4 profiles. It is a direct port of
* C code, does not use Object Oriented principles. Quick and Dirty implementation
* for testing.
*/
public final class NFS4StringPrep {
private StringPrep nfscss = null;
private StringPrep nfscsi = null;
private StringPrep nfscis = null;
private StringPrep nfsmxp = null;
private StringPrep nfsmxs = null;
//singleton instance
private static final NFS4StringPrep prep = new NFS4StringPrep();
private NFS4StringPrep (){
ClassLoader loader = NFS4StringPrep.class.getClassLoader();
try{
InputStream nfscsiFile = loader.getResourceAsStream("com/ibm/icu/dev/data/testdata/nfscsi.spp");
nfscsi = new StringPrep(nfscsiFile);
nfscsiFile.close();
InputStream nfscssFile = loader.getResourceAsStream("com/ibm/icu/dev/data/testdata/nfscss.spp");
nfscss = new StringPrep(nfscssFile);
nfscssFile.close();
InputStream nfscisFile = loader.getResourceAsStream("com/ibm/icu/dev/data/testdata/nfscis.spp");
nfscis = new StringPrep(nfscisFile);
nfscisFile.close();
InputStream nfsmxpFile = loader.getResourceAsStream("com/ibm/icu/dev/data/testdata/nfsmxp.spp");
nfsmxp = new StringPrep(nfsmxpFile);
nfsmxpFile.close();
InputStream nfsmxsFile = loader.getResourceAsStream("com/ibm/icu/dev/data/testdata/nfsmxs.spp");
nfsmxs = new StringPrep(nfsmxsFile);
nfsmxsFile.close();
}catch(IOException e){
throw new MissingResourceException(e.toString(),"","");
}
}
private static byte[] prepare(byte[] src, StringPrep strprep)
throws StringPrepParseException, UnsupportedEncodingException{
String s = new String(src, "UTF-8");
UCharacterIterator iter = UCharacterIterator.getInstance(s);
StringBuffer out = strprep.prepare(iter,StringPrep.DEFAULT);
return out.toString().getBytes("UTF-8");
}
public static byte[] cs_prepare(byte[] src, boolean isCaseSensitive)
throws StringPrepParseException, UnsupportedEncodingException{
if(isCaseSensitive == true ){
return prepare(src, prep.nfscss);
}else{
return prepare(src, prep.nfscsi);
}
}
public static byte[] cis_prepare(byte[] src)
throws IOException, StringPrepParseException, UnsupportedEncodingException{
return prepare(src, prep.nfscis);
}
/* sorted array for binary search*/
private static final String[] special_prefixes={
"ANONYMOUS",
"AUTHENTICATED",
"BATCH",
"DIALUP",
"EVERYONE",
"GROUP",
"INTERACTIVE",
"NETWORK",
"OWNER",
};
/* binary search the sorted array */
private static final int findStringIndex(String[] sortedArr,String target){
int left, middle, right,rc;
left =0;
right= sortedArr.length-1;
while(left <= right){
middle = (left+right)/2;
rc= sortedArr[middle].compareTo(target);
if(rc<0){
left = middle+1;
}else if(rc >0){
right = middle -1;
}else{
return middle;
}
}
return -1;
}
private static final char AT_SIGN = '@';
public static byte[] mixed_prepare(byte[] src)
throws IOException, StringPrepParseException, UnsupportedEncodingException{
String s = new String(src, "UTF-8");
int index = s.indexOf(AT_SIGN);
StringBuffer out = new StringBuffer();
if(index > -1){
/* special prefixes must not be followed by suffixes! */
String prefixString = s.substring(0,index);
int i= findStringIndex(special_prefixes, prefixString);
String suffixString = s.substring(index+1, s.length());
if(i>-1 && !suffixString.equals("")){
throw new StringPrepParseException("Suffix following a special index", StringPrepParseException.INVALID_CHAR_FOUND);
}
UCharacterIterator prefix = UCharacterIterator.getInstance(prefixString);
UCharacterIterator suffix = UCharacterIterator.getInstance(suffixString);
out.append(prep.nfsmxp.prepare(prefix,StringPrep.DEFAULT));
out.append(AT_SIGN); // add the delimiter
out.append(prep.nfsmxs.prepare(suffix, StringPrep.DEFAULT));
}else{
UCharacterIterator iter = UCharacterIterator.getInstance(s);
out.append(prep.nfsmxp.prepare(iter,StringPrep.DEFAULT));
}
return out.toString().getBytes("UTF-8");
}
}