StringUtils.java Source code

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Here is the source code for StringUtils.java

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/*
 * Copyright (c) 2006/2007 Flipperwing Ltd. (http://www.flipperwing.com)
 *
 * 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 org.gwm.splice.client.util;

import java.util.ArrayList;

/**
 * Helper methods for Strings.
 * 
 * @author Andy Scholz (andy.scholz@gmail.com)
 *
 */
public class StringUtils {

    /**
     * Converts an array of Strings to a comma-sperated-list.
     * 
     * @param vals
     * @return
     */
    public static String arrayToCSL(String[] vals) {
        if (vals == null) {
            return null;
        }
        String csl = null;
        boolean first = true;
        for (int i = 0; i < vals.length; i++) {
            if (vals[i] != null) {
                if (first) {
                    csl = vals[i];
                    first = false;
                } else {
                    csl = "," + vals[i];
                }
            }
        }
        return csl;
    }

    /**
     * Parses a comma-seperated-list into an array;
     * 
     * @param csl
     * @return
     */
    public static String[] cslToArray(String csl) {
        if (csl == null) {
            return null;
        }
        ArrayList list = new ArrayList();
        String[] vals = csl.split(",");
        for (int i = 0; i < vals.length; i++) {
            String val = vals[i].trim();
            if (val.length() > 0) {
                list.add(val);
            }
        }
        String[] sl = new String[list.size()];
        for (int i = 0; i < sl.length; i++) {
            sl[i] = (String) list.get(i);
        }
        return sl;
        // seems GWT compiler dont like this.....
        //return (String[]) list.toArray(new String[list.size()]);
    }
}