SubstringCustomConfigMethod.java

/*
 * Copyright (c) 2014 EMC Corporation
 * All Rights Reserved
 */

package com.emc.storageos.customconfigcontroller;

import java.util.List;

/**
 * A string manipulation function that returns the n to m characters in a string
 * 
 */
public class SubstringCustomConfigMethod extends CustomConfigMethod {

    public String invoke(String str, List<String> args) {
        int start = Integer.parseInt(args.get(0));
        int end = Integer.parseInt(args.get(1));
        if (start < 0) {
            start = 0;
        }
        if (end >= str.length()) {
            end = str.length();
        }
        return str.substring(start, end);
    }

}