Java tutorial
/* * Copyright (c) 2009 WiQuery team * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package org.odlabs.wiquery.core.commons.merge; import java.util.HashMap; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.servlet.http.HttpServletRequest; import org.apache.wicket.Application; import org.apache.wicket.IClusterable; import org.apache.wicket.RequestCycle; import org.apache.wicket.Resource; import org.apache.wicket.ResourceReference; import org.apache.wicket.markup.html.resources.CompressedResourceReference; import org.apache.wicket.protocol.http.WebRequest; import org.apache.wicket.util.io.Streams; import org.apache.wicket.util.lang.Packages; import org.apache.wicket.util.resource.IResourceStream; import org.apache.wicket.util.resource.StringResourceStream; import org.apache.wicket.util.template.PackagedTextTemplate; import org.apache.wicket.util.time.Time; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * $Id: WiQueryMergedStyleSheetResourceReference.java 1010 2011-05-13 15:22:25Z hielke.hoeve@gmail.com $ * * <p> * Merged many stylesheet {@link ResourceReference} into one {@link IResourceStream} * </p> * * @author Julien Roche * @since 1.1 * */ public class WiQueryMergedStyleSheetResourceReference extends CompressedResourceReference implements IClusterable { // Constants /** Constant of serialization */ private static final long serialVersionUID = 6038498199511603297L; /** Name of the template for our ResourceReference */ private static final String TEMPLATE_NAME = "wiquery-merged.css"; /** Content-type */ private static final String CONTENT_TYPE = "text/css"; /** Regular expression to find the url */ private static final String REGEX = "url\\(.*?\\)"; /** Logger */ private static final Logger LOGGER = LoggerFactory.getLogger(WiQueryMergedStyleSheetResourceReference.class); /** * Convert local URL for the merging stylesheet( the url will be broken, so * we have to rewrite it !!) * @param url * @param baseUrl * @return */ protected static String getCssUrl(String url, String baseUrl) { String cleaned = url.replace(" ", "").replace("'", "").replace("\"", ""); cleaned = cleaned.substring(4); // remove '(' cleaned = cleaned.substring(0, cleaned.length() - 1); // remove ')' if (cleaned.startsWith("http:") || cleaned.startsWith("https:") || cleaned.startsWith("ftp:") || cleaned.startsWith("file:")) { return "url(\"" + cleaned + "\")"; // Quotes are important for the merging process } StringBuffer buffer = new StringBuffer(); buffer.append("url(\""); buffer.append(baseUrl); buffer.append(cleaned); buffer.append("\")"); return buffer.toString(); } // Properties private PackagedTextTemplate csstemplate; private WiQueryHeaderResponse wiQueryHeaderResponse; /** * Default constructor */ public WiQueryMergedStyleSheetResourceReference(WiQueryHeaderResponse wiQueryHeaderResponse) { super(WiQueryMergedStyleSheetResourceReference.class, TEMPLATE_NAME + "_" + WiQueryHeaderResponse.getMergedResourceName(wiQueryHeaderResponse.getStylesheet())); this.wiQueryHeaderResponse = wiQueryHeaderResponse; csstemplate = new PackagedTextTemplate(WiQueryMergedStyleSheetResourceReference.class, TEMPLATE_NAME); } /** * Returns the last modified time of the {@link PackagedTextTemplate} * itself. * * @return the last modified time of the {@link PackagedTextTemplate} itself */ public Time lastModifiedTime() { return csstemplate.lastModifiedTime(); } /** * {@inheritDoc} * @see org.apache.wicket.ResourceReference#newResource() */ @Override protected Resource newResource() { return new Resource() { private static final long serialVersionUID = 1L; /** * {@inheritDoc} * @see org.apache.wicket.Resource#getResourceStream() */ public IResourceStream getResourceStream() { return newResourceStream(); } }; } private IResourceStream newResourceStream() { String temp = null; String cssUrl; String name; String old; String match; StringBuffer buffer = new StringBuffer(); HttpServletRequest request = ((WebRequest) RequestCycle.get().getRequest()).getHttpServletRequest(); String baseHost = request.getRequestURL().toString(); baseHost = baseHost.substring(0, baseHost.indexOf(request.getRequestURI())) + request.getContextPath() + "/resources/"; for (ResourceReference ref : wiQueryHeaderResponse.getStylesheet()) { // We bind the resources into the SharedResources ref.bind(Application.get()); // We insert the javascript code into the template try { IResourceStream resource = Application.get().getResourceSettings().getResourceStreamLocator() .locate(getClass(), "/" + Packages.absolutePath(ref.getScope(), "") + "/" + ref.getName()); if (resource != null) temp = Streams.readString(resource.getInputStream()); // Replace of url in the css file (regexp: url\(.*?\) ) name = ref.getName(); cssUrl = baseHost + ref.getScope().getName() + "/" + (name.indexOf("/") < 0 ? "" : name.substring(0, name.lastIndexOf("/") + 1)); Pattern p = Pattern.compile(REGEX); Matcher m = p.matcher(temp); // get a matcher object int count = 0; while (m.find()) { count++; match = m.group(); old = getCssUrl(match, cssUrl); if (!old.equals(match)) { temp = temp.replace(match, old); } } } catch (Exception e) { temp = null; e.printStackTrace(); LOGGER.error("error in merged processing", e); } if (temp != null) { buffer.append(temp).append("\r\n"); } } Map<String, Object> genCss = new HashMap<String, Object>(); genCss.put("wiqueryresources", buffer); csstemplate.interpolate(genCss); return new StringResourceStream(csstemplate.asString(), CONTENT_TYPE); } }