StringTokenizer.java

/*
* Copyright 2010-2011 Research In Motion Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package blackberry.common.util;

/**
 * @author yiwu
 * 
 *         A string tokenizer.
 */
public class StringTokenizer {
    private String _toParse;
    private final String _token;

    /**
     * Constructs the string tokenizer.
     * 
     * @param s
     *            The string
     * @param token
     *            The token
     */
    public StringTokenizer( final String s, final String token ) {
        _toParse = s;
        _token = token;
    }

    /**
     * Returns if there is more token.
     * 
     * @return <code>true</code> if yes; otherwise returns <code>false</code>
     */
    public boolean hasMoreTokens() {
        return _toParse.length() != 0;
    }

    /**
     * Returns the next token.
     * 
     * @return The next token
     */
    public String nextToken() {
        final int index = _toParse.indexOf( _token );
        String result = null;
        if( index != -1 ) {
            result = _toParse.substring( 0, index );
            _toParse = _toParse.substring( index + 1 );
        } else if( _toParse.length() != 0 ) {
            result = _toParse;
            _toParse = "";
        }
        return result;
    }

    /**
     * Returns the string to be parsed.
     * 
     * @return The string
     */
    public String toString() {
        return _toParse;
    }
}