Java String Join join(boolean endSlash, Collection paths)

Description

join

License

Apache License

Declaration

public static String join(boolean endSlash, Collection<String> paths) 

Method Source Code

//package com.java2s;
/*/*from  w  w w.  java2  s. c  o  m*/
 * Copyright (C) 2012 tamtam180
 *
 * 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.
 */

import java.util.Arrays;
import java.util.Collection;

public class Main {
    public static String join(String... params) {
        if (params == null) {
            return null;
        }
        return join(false, Arrays.asList(params));
    }

    public static String join(boolean endSlash, Collection<String> paths) {
        if (paths == null || paths.isEmpty()) {
            return null;
        }

        boolean prevLastSlash = false;
        StringBuilder buffer = new StringBuilder();
        for (String param : paths) {
            if (param == null)
                continue;
            if (!prevLastSlash && !param.startsWith("/")) {
                buffer.append('/');
            }
            if (prevLastSlash && param.startsWith("/")) {
                buffer.append(param.substring(1));
            } else {
                buffer.append(param);
            }
            prevLastSlash = param.endsWith("/");
        }
        if (endSlash && !prevLastSlash) {
            buffer.append('/');
        }
        return buffer.toString();
    }
}

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