Java tutorial
/* Copyright (2007-2012) Schibsted ASA * This file is part of Possom. * * Possom 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. * * Possom 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 Possom. If not, see <http://www.gnu.org/licenses/>. */ package no.sesat.search.view.velocity; import java.io.IOException; import java.io.Writer; import java.util.List; import java.util.Arrays; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.apache.log4j.Logger; import org.apache.velocity.context.InternalContextAdapter; import org.apache.velocity.exception.MethodInvocationException; import org.apache.velocity.exception.ParseErrorException; import org.apache.velocity.exception.ResourceNotFoundException; import org.apache.velocity.runtime.directive.Directive; import org.apache.velocity.runtime.parser.node.Node; /** * * A velocity directive to bold (query) word(s) * param 1: text to replace * param 2: query * * - "og" and "i" in the query should not be bolded. * - Capitalized words should stay capitalized * - remove "," and "!" from query words * - independant word ("Billn" should not match ln) * * <code> * #boldWord('leter du etter hotell i Paris' 'hotell i paris') * returns the string: "leter du etter <b>hotell</b> i <b>Paris</b>" * </code> * * * * @version $Id$ */ public final class BoldWordDirective extends AbstractDirective { private static final Logger LOG = Logger.getLogger(BoldWordDirective.class); private static final String NAME = "boldWord"; public String getName() { return NAME; } public int getType() { return LINE; } public boolean render(final InternalContextAdapter context, final Writer writer, final Node node) throws IOException, ResourceNotFoundException, ParseErrorException, MethodInvocationException { final int argCount = node.jjtGetNumChildren(); if (argCount != 1) { String text = getArgument(context, node, 0); final String uquery = getArgument(context, node, 1); String query = org.apache.commons.lang.StringEscapeUtils.unescapeHtml(uquery); if (text == null) { writer.write(""); return true; } query = query.replaceAll("\"", "").replaceAll("'", ""); final List list = Arrays.asList(query.split("[\\p{Punct}\\p{Space}]+")); for (int i = 0; i < list.size(); i++) { if (!list.get(i).toString().toLowerCase().equals("og") && !list.get(i).toString().toLowerCase().equals("i")) { final String regexPattern = "(\\s|^)(" + list.get(i).toString() + ")(?![a-z])"; final Pattern p = Pattern.compile(regexPattern, Pattern.CASE_INSENSITIVE); final Matcher m = p.matcher(text); text = m.replaceAll(" <b>$2</b>"); } } writer.write(text); if (node.getLastToken().image.endsWith("\n")) { writer.write('\n'); } } else { final String msg = '#' + getName() + " - wrong number of arguments"; LOG.error(msg); return false; } return true; } }