Java tutorial
/* * Copyright (C) 2013 Iorga Group * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see [http://www.gnu.org/licenses/]. */ package com.iorga.webappwatcher.util; import java.util.ArrayList; import java.util.List; import java.util.regex.Pattern; import org.apache.commons.lang.StringUtils; public final class PatternListParameterHandler<T> extends BasicParameterHandler<T, List<Pattern>> { public PatternListParameterHandler(final Class<T> ownerClass, final String fieldName) { super(ownerClass, fieldName); } @Override protected List<Pattern> convertFromString(final String value) { final List<Pattern> patterns = new ArrayList<Pattern>(); final String[] includes = value.split(","); for (final String include : includes) { if (StringUtils.isNotBlank(include)) { patterns.add(Pattern.compile(include)); } } return patterns; } @Override protected String convertToString(final List<Pattern> value) { if (value == null) { return ""; } final StringBuilder stringBuilder = new StringBuilder(); boolean first = true; for (final Pattern pattern : value) { if (!first) { stringBuilder.append(','); } else { first = false; } stringBuilder.append(pattern.pattern()); } return stringBuilder.toString(); } @Override public boolean isFieldSetIfBlank() { return true; } }