001 /* 002 * Copyright © 2008, 2012 Pedro Agulló Soliveres. 003 * 004 * This file is part of DirectJNgine. 005 * 006 * DirectJNgine is free software: you can redistribute it and/or modify 007 * it under the terms of the GNU Lesser General Public License as published by 008 * the Free Software Foundation, either version 3 of the License. 009 * 010 * Commercial use is permitted to the extent that the code/component(s) 011 * do NOT become part of another Open Source or Commercially developed 012 * licensed development library or toolkit without explicit permission. 013 * 014 * DirectJNgine is distributed in the hope that it will be useful, 015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 017 * GNU Lesser General Public License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public License 020 * along with DirectJNgine. If not, see <http://www.gnu.org/licenses/>. 021 * 022 * This software uses the ExtJs library (http://extjs.com), which is 023 * distributed under the GPL v3 license (see http://extjs.com/license). 024 */ 025 026 package com.softwarementors.extjs.djn; 027 028 import java.util.ArrayList; 029 import java.util.List; 030 import java.util.Locale; 031 032 public final class StringUtils { 033 private StringUtils() { 034 // Disallow instantiation 035 } 036 037 public static boolean isEmpty( String value ) { 038 return value == null || value.equals( ""); 039 } 040 041 public static String concatWithSeparator(List<String> missingParameters, String separator) { 042 assert missingParameters != null; 043 assert separator != null; 044 045 if( missingParameters.isEmpty() ) { 046 return ""; 047 } 048 049 StringBuilder result = new StringBuilder(); 050 for( int i = 0; i < missingParameters.size() - 1; i++) { 051 result.append( missingParameters.get(i)); 052 result.append( separator ); 053 } 054 055 result.append( missingParameters.get( missingParameters.size() - 1)); 056 057 return result.toString(); 058 } 059 060 // Returns a list of strings form a 'delimiter' separated string. 061 // It removes whitespace from every value, and ignores empty strings 062 public static List<String> getNonBlankValues( String delimitedValues, String delimiter ) { 063 assert !StringUtils.isEmpty( delimitedValues ); 064 assert !StringUtils.isEmpty(delimiter); 065 066 List<String> result = new ArrayList<String>(); 067 String[] values = delimitedValues.split( delimiter); 068 for( String value : values ) { 069 value = value.trim(); 070 if( !value.equals( "")) { 071 result.add( value ); 072 } 073 } 074 075 return result; 076 } 077 078 public static boolean startsWithCaseInsensitive( String s1, String s2) { 079 assert s2 != null; 080 081 if( s1 == null ) { 082 return false; 083 } 084 String s1lower = s1.toLowerCase(Locale.getDefault()); 085 String s2lower = s2.toLowerCase(Locale.getDefault()); 086 return s1lower.startsWith(s2lower); 087 } 088 }