/** Adds the contracting string into the collation table. */
private final void addContractOrder(String groupChars, int anOrder, boolean fwd) {
if (contractTable == null) {
contractTable = new Vector(INITIALTABLESIZE);
}
// initial character
int ch = groupChars.codePointAt(0);
/*
char ch0 = groupChars.charAt(0);
int ch = Character.isHighSurrogate(ch0)?
Character.toCodePoint(ch0, groupChars.charAt(1)):ch0;
*/
// See if the initial character of the string already has a contract table.
int entry = mapping.elementAt(ch);
Vector entryTable = getContractValuesImpl(entry - RBCollationTables.CONTRACTCHARINDEX);
if (entryTable == null) {
// We need to create a new table of contract entries for this base char
int tableIndex = RBCollationTables.CONTRACTCHARINDEX + contractTable.size();
entryTable = new Vector(INITIALTABLESIZE);
contractTable.addElement(entryTable);
// Add the initial character's current ordering first. then
// update its mapping to point to this contract table
entryTable.addElement(new EntryPair(groupChars.substring(0, Character.charCount(ch)), entry));
mapping.setElementAt(ch, tableIndex);
}
// Now add (or replace) this string in the table
int index = RBCollationTables.getEntry(entryTable, groupChars, fwd);
if (index != RBCollationTables.UNMAPPED) {
EntryPair pair = (EntryPair) entryTable.elementAt(index);
pair.value = anOrder;
} else {
EntryPair pair = (EntryPair) entryTable.lastElement();
// NOTE: This little bit of logic is here to speed CollationElementIterator
// .nextContractChar(). This code ensures that the longest sequence in
// this list is always the _last_ one in the list. This keeps
// nextContractChar() from having to search the entire list for the longest
// sequence.
if (groupChars.length() > pair.entryName.length()) {
entryTable.addElement(new EntryPair(groupChars, anOrder, fwd));
} else {
entryTable.insertElementAt(new EntryPair(groupChars, anOrder, fwd), entryTable.size() - 1);
}
}
// If this was a forward mapping for a contracting string, also add a
// reverse mapping for it, so that CollationElementIterator.previous
// can work right
if (fwd && groupChars.length() > 1) {
addContractFlags(groupChars);
addContractOrder(new StringBuffer(groupChars).reverse().toString(), anOrder, false);
}
}
/**
* If the given string has been specified as a contracting string in this collation table, return
* its ordering. Otherwise return UNMAPPED.
*/
private int getContractOrder(String groupChars) {
int result = RBCollationTables.UNMAPPED;
if (contractTable != null) {
int ch = groupChars.codePointAt(0);
/*
char ch0 = groupChars.charAt(0);
int ch = Character.isHighSurrogate(ch0)?
Character.toCodePoint(ch0, groupChars.charAt(1)):ch0;
*/
Vector entryTable = getContractValues(ch);
if (entryTable != null) {
int index = RBCollationTables.getEntry(entryTable, groupChars, true);
if (index != RBCollationTables.UNMAPPED) {
EntryPair pair = (EntryPair) entryTable.elementAt(index);
result = pair.value;
}
}
}
return result;
}
