Java ID Value Create toIdentifier(String name)

Description

convert a name to Java-compatible identifier name.

License

Open Source License

Declaration

public static String toIdentifier(String name) 

Method Source Code

//package com.java2s;
/*// w  w w. j  ava 2  s.  c o  m
 * @(#)$Id$
 *
 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */

public class Main {
    /** convert a name to Java-compatible identifier name. */
    public static String toIdentifier(String name) {
        return xmlNameToJavaName("field", name);
    }

    /**
     * convert XML names (like element names) to the corresponding Java names.
     * 
     * This method should perform conversion like ("abc"->"Abc").
     * 
     * @param role
     *      the role of this expression. One of "field","interface", and "class".
     */
    public static String xmlNameToJavaName(String role, String xmlName) {
        // TODO
        if (role.equals("class"))
            return convertToCamelNotation(xmlName, true);

        if (role.equals("interface"))
            return "I" + convertToCamelNotation(xmlName, true);

        return convertToCamelNotation(xmlName, false);
    }

    /**
     * converts a given string to the camel notation.
     */
    private static String convertToCamelNotation(String name, boolean capitalizeFirstLetter) {
        StringBuffer r = new StringBuffer();
        boolean capitalize = capitalizeFirstLetter;

        int len = name.length();
        for (int i = 0; i < len; i++) {
            char ch = name.charAt(i);
            if (isValidCharacterAsIdentifier(ch, r.length() == 0)) {
                if (capitalize)
                    r.append(Character.toUpperCase(ch));
                else
                    r.append(ch);
                capitalize = false;
            } else {
                // invalid character. Skip it, but capitalize the next valid char.
                capitalize = true;
            }
        }
        return r.toString();
    }

    /**
     * decides if the specified character is a valid character as an identifier.
     */
    private static boolean isValidCharacterAsIdentifier(char ch, boolean isFirstChar) {
        if ("$_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".indexOf(ch) >= 0)
            return true;

        if (!isFirstChar && "1234567890".indexOf(ch) >= 0)
            return true;

        return false;
    }
}

Related

1. toId(String id)
2. toId(String name)
3. toId(String text)
4. toIdableName(String xpath)
5. toIdentifier(String input)
6. toIdentifier(String name, StringBuffer fieldName)
7. toIdentifier(String str)
8. toIdentifier(String text)
9. toIdentifierString(long val)