Example usage for java.text RuleBasedCollator getCollationElementIterator

Introduction

In this page you can find the example usage for java.text RuleBasedCollator getCollationElementIterator.

Prototype

public CollationElementIterator getCollationElementIterator(CharacterIterator source) 

Source Link

Document

Returns a CollationElementIterator for the given CharacterIterator.

Usage

From source file:Search.java

public static int indexOf(String source, String pattern) {
    RuleBasedCollator rbc = (RuleBasedCollator) Collator.getInstance();
    rbc.setStrength(Collator.SECONDARY);

    CollationElementIterator textCEI;
    CollationElementIterator patCEI;
    textCEI = rbc.getCollationElementIterator(source);
    patCEI = rbc.getCollationElementIterator(pattern);

    // e1 will contain the collation element for the source
    // e2 will contain the collation element for the pattern
    int e1, e2;//from  w w w  .j  a  v  a  2 s .  c o  m
    int startMatch = -1;

    // initialize e2 with the first collation element in the pattern
    e2 = patCEI.next();

    while ((e1 = textCEI.next()) != CollationElementIterator.NULLORDER) {
        if (e1 == e2) { // if the elements match
            if (startMatch == -1)
                startMatch = textCEI.getOffset();
            e2 = patCEI.next(); // increment to the next element
            if (e2 == CollationElementIterator.NULLORDER)
                break;
        } else { // elements do not match
            if (startMatch != -1) {
                patCEI.reset();
                e2 = patCEI.next();
                startMatch = -1;
            }
        }
    }
    return startMatch;
}

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