/**
* Copyright (C) 2013-2015 all@code-story.net
*
* 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 net.codestory.http.misc;
public class UrlConcat {
public String url(String resourcePrefix, String classPrefix, String uri) {
StringBuilder urlBuilder = new StringBuilder();
appendUrl(urlBuilder, resourcePrefix);
appendUrl(urlBuilder, classPrefix);
appendUrl(urlBuilder, uri);
return urlBuilder.toString();
}
private static void appendUrl(StringBuilder appendTo, String path) {
if (path.isEmpty()) {
return;
}
if ((path.charAt(0) == '/') && endWith(appendTo, '/')) {
appendTo.append(path, 1, path.length());
} else if ((path.charAt(0) != '/') && (path.charAt(0) != '?') && !endWith(appendTo, '/')) {
appendTo.append('/').append(path);
} else {
appendTo.append(path);
}
}
private static boolean endWith(StringBuilder appendTo, char character) {
int length = appendTo.length();
return (length > 0) && (appendTo.charAt(length - 1) == character);
}
}