001/* 002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the Eclipse Public License v1.0 006 * which accompanies this distribution, and is available at 007 * http://www.eclipse.org/legal/epl-v10.html 008 * 009 * Contributors: 010 * bstefanescu 011 * 012 * $Id$ 013 */ 014 015package org.nuxeo.ecm.platform.rendering.wiki; 016 017import java.io.BufferedReader; 018import java.io.File; 019import java.io.IOException; 020import java.io.InputStream; 021import java.io.InputStreamReader; 022import java.io.Reader; 023import java.io.StringReader; 024import java.io.StringWriter; 025import java.io.Writer; 026import java.net.URL; 027import java.util.Map; 028 029import org.apache.commons.io.IOUtils; 030import org.nuxeo.ecm.core.api.model.Property; 031import org.nuxeo.ecm.platform.rendering.api.RenderingException; 032import org.nuxeo.ecm.platform.rendering.fm.FreemarkerEngine; 033import org.nuxeo.ecm.platform.rendering.fm.adapters.ComplexPropertyTemplate; 034import org.nuxeo.ecm.platform.rendering.wiki.extensions.FreemarkerMacro; 035import org.wikimodel.wem.WikiParserException; 036 037import freemarker.core.Environment; 038import freemarker.template.SimpleScalar; 039import freemarker.template.TemplateDirectiveBody; 040import freemarker.template.TemplateDirectiveModel; 041import freemarker.template.TemplateException; 042import freemarker.template.TemplateModel; 043import freemarker.template.TemplateModelException; 044 045/** 046 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 047 */ 048public class WikiTransformer implements TemplateDirectiveModel { 049 050 protected final WikiSerializer serializer; 051 052 public WikiTransformer() { 053 this(new WikiSerializer()); 054 } 055 056 public WikiTransformer(WikiSerializer serializer) { 057 this.serializer = serializer; 058 this.serializer.registerMacro(new FreemarkerMacro()); 059 // TODO implement and register a JEXL extension 060 } 061 062 public WikiSerializer getSerializer() { 063 return serializer; 064 } 065 066 public void transform(Reader reader, Writer writer) throws RenderingException { 067 try { 068 serializer.serialize(reader, writer); 069 } catch (IOException | WikiParserException e) { 070 throw new RenderingException(e); 071 } 072 } 073 074 public void transform(URL url, Writer writer) throws RenderingException { 075 Reader reader = null; 076 try { 077 InputStream in = url.openStream(); 078 reader = new BufferedReader(new InputStreamReader(in)); 079 transform(reader, writer); 080 } catch (IOException e) { 081 throw new RenderingException(e); 082 } finally { 083 IOUtils.closeQuietly(reader); 084 } 085 } 086 087 @Override 088 @SuppressWarnings("rawtypes") 089 public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body) 090 throws TemplateException, IOException { 091 092 // TODO: not used for now. 093 String syntax = null; 094 SimpleScalar scalar = (SimpleScalar) params.get("syntax"); 095 if (scalar != null) { 096 syntax = scalar.getAsString(); 097 } 098 099 scalar = (SimpleScalar) params.get("src"); 100 String src = null; 101 if (scalar != null) { 102 src = scalar.getAsString(); 103 } 104 105 ComplexPropertyTemplate complex = (ComplexPropertyTemplate) params.get("property"); 106 Property property = null; 107 if (complex != null) { 108 property = (Property) complex.getAdaptedObject(null); 109 } 110 111 FreemarkerEngine engine = (FreemarkerEngine) env.getCustomAttribute(FreemarkerEngine.RENDERING_ENGINE_KEY); 112 if (engine == null) { 113 throw new TemplateModelException("Not in a nuxeo rendering context"); 114 } 115 116 try { 117 if (property != null) { 118 // TODO XXX implement property support (with caching) 119 throw new UnsupportedOperationException("Not Yet Implemented"); 120 // URL url = PropertyURL.getURL(ctxModel.getDocument(), property.getPath()); 121 // tr.transform(url, env.getOut(), ctxModel.getContext()); 122 } else if (src == null) { 123 if (body == null) { 124 throw new TemplateModelException( 125 "Transform directive must have either a content either a valid 'src' attribute"); 126 } 127 // render body to get back the result 128 StringWriter writer = new StringWriter(); 129 body.render(writer); 130 String content = writer.getBuffer().toString(); 131 transform(new StringReader(content), env.getOut()); 132 } else { 133 if (src.contains(":/")) { 134 URL url = engine.getResourceLocator().getResourceURL(src); 135 if (url != null) { 136 transform(url, env.getOut()); 137 } else { 138 throw new IllegalArgumentException("Cannot resolve the src attribute: " + src); 139 } 140 } else { 141 File file = engine.getResourceLocator().getResourceFile(src); 142 if (file != null) { 143 transform(file.toURI().toURL(), env.getOut()); 144 } else { 145 throw new IllegalArgumentException("Cannot resolve the src attribute: " + src); 146 } 147 } 148 } 149 } catch (RenderingException e) { 150 throw new TemplateException("Running wiki transformer failed", e, env); 151 } 152 } 153 154}