Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

public class Main {
    /**
     * @param source
     * @return Identifier that stands for tag name or tag attribute at the start
     *         of specified string.
     */
    public static String getIdentifier(String source) {
        if (source.length() == 0) {
            return null;
        }

        StringBuilder buffer = new StringBuilder();
        int index = 0;
        int len = source.length();
        boolean charOk;
        do {
            char ch = source.charAt(index);
            charOk = (index == 0 && Character.isJavaIdentifierStart(ch))
                    || (Character.isJavaIdentifierPart(ch) || ch == '-' || ch == ':' || ch == '.');
            if (charOk) {
                buffer.append(ch);
            }
            index++;
        } while (charOk && index < len);

        String identifier = buffer.toString();
        return identifier.length() > 0 ? identifier : null;
    }
}