001 /* 002 * Created on Jun 25, 2009 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 * 014 * Copyright @2009-2010 the original author or authors. 015 */ 016 package org.fest.swing.util; 017 018 import java.util.regex.Pattern; 019 020 import org.fest.util.Arrays; 021 022 /** 023 * Understands utility methods for regular expression patterns. 024 * 025 * @author Alex Ruiz 026 */ 027 public final class Patterns { 028 029 /** 030 * Formats the given array of regular expression patterns. 031 * <p> 032 * For example, the array 033 * <pre> 034 * Pattern[] patterns = { Pattern.compile("hello"), Pattern.compile("world") }; 035 * </pre> 036 * will be formatted as 037 * <pre> 038 * ['hello', 'world'] 039 * </pre> 040 * </p> 041 * @param patterns the array of patterns to format. 042 * @return the <code>String</code> containing the formatted array. 043 * @throws NullPointerException if the given array of patterns is <code>null</code>. 044 * @throws NullPointerException if any of the patterns in the given array is <code>null</code>. 045 */ 046 public static String format(Pattern[] patterns) { 047 if (patterns == null) throw new NullPointerException("The array of patterns should not be null"); 048 int patternCount = patterns.length; 049 String[] patternsAsText = new String[patternCount]; 050 for (int i = 0; i < patternCount; i++) 051 patternsAsText[i] = patternValueOf(patterns[i]); 052 return Arrays.format(patternsAsText); 053 } 054 055 private static String patternValueOf(Pattern pattern) { 056 if (pattern == null) throw new NullPointerException("The array of patterns should not contain null values"); 057 return pattern.pattern(); 058 } 059 060 private Patterns() {} 061 062 }