br.com.caelum.vraptor.util.StringUtils Maven / Gradle / Ivy
/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.util;
import com.thoughtworks.xstream.InitializationException;
import java.util.ArrayList;
import java.util.List;
import javax.enterprise.inject.Vetoed;
/**
* Utility methods to handle strings
*
* @author Lucas Cavalcanti
*/
@Vetoed
public final class StringUtils {
private StringUtils(){
throw new InitializationException("Not allowed to initialize");
}
public static String decapitalize(String name) {
if (name.length() == 1) {
return name.toLowerCase();
}
return Character.toLowerCase(name.charAt(0)) + name.substring(1);
}
public static String capitalize(String name) {
if (name.length() == 1) {
return name.toUpperCase();
}
return Character.toUpperCase(name.charAt(0)) + name.substring(1);
}
public static String lowercaseFirst(String name) {
// common case: SomeClass -> someClass
if(name.length() > 1 && Character.isLowerCase(name.charAt(1))) {
return decapitalize(name);
}
// different case: URLClassLoader -> urlClassLoader
for (int i = 1; i < name.length(); i++) {
if(Character.isLowerCase(name.charAt(i))) {
return name.substring(0, i-1).toLowerCase()+name.substring(i-1, name.length());
}
}
// all uppercase: URL -> url
return name.toLowerCase();
}
public static String[] extractParameters(String uri) {
//yeah, regexes are the root of all evil... so falling back to bracket matching!!! =)
List params = new ArrayList<>();
StringBuilder param = new StringBuilder();
int brackets = 0;
for (int i = 0; i < uri.length(); i++) {
char character = uri.charAt(i);
if (character == '{') {
brackets++;
if (brackets == 1) {
continue;
}
} else if (character == '}') {
brackets--;
if (brackets == 0) {
params.add(param.toString());
param = new StringBuilder();
}
}
if (brackets > 0) {
param.append(character);
}
}
return params.toArray(new String[params.size()]);
}
}