javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/ElementGenerator.java
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/ElementGenerator.java Thu Mar 21 15:45:42 2013 +0100
1.3 @@ -0,0 +1,175 @@
1.4 +/**
1.5 + * Back 2 Browser Bytecode Translator
1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, version 2 of the License.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License
1.18 + * along with this program. Look for COPYING file in the top folder.
1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 + */
1.21 +package org.apidesign.bck2brwsr.htmlpage;
1.22 +
1.23 +import java.io.IOException;
1.24 +import java.io.OutputStreamWriter;
1.25 +import java.io.Writer;
1.26 +import java.util.Arrays;
1.27 +import java.util.Collections;
1.28 +import java.util.HashMap;
1.29 +import java.util.Map;
1.30 +import java.util.Map.Entry;
1.31 +import java.util.ServiceLoader;
1.32 +import javax.annotation.processing.ProcessingEnvironment;
1.33 +import javax.lang.model.element.Element;
1.34 +import javax.tools.Diagnostic;
1.35 +import javax.tools.FileObject;
1.36 +import org.netbeans.modules.html.editor.lib.api.HtmlVersion;
1.37 +import org.netbeans.modules.html.editor.lib.api.model.HtmlModel;
1.38 +import org.netbeans.modules.html.editor.lib.api.model.HtmlModelProvider;
1.39 +import org.netbeans.modules.html.editor.lib.api.model.HtmlTag;
1.40 +import org.netbeans.modules.html.editor.lib.api.model.HtmlTagAttribute;
1.41 +
1.42 +/**
1.43 + *
1.44 + * @author Jan Horvath <jhorvath@netbeans.org>
1.45 + */
1.46 +public class ElementGenerator {
1.47 +
1.48 + static final Map<String, String> NAMING_EXCEPTIONS = new HashMap<String, String>() {
1.49 + {
1.50 + put("img", "Image");
1.51 + put("class", "Clazz");
1.52 + }
1.53 + };
1.54 +
1.55 + static final String javaKeywords[] = {
1.56 + "abstract", "assert", "boolean", "break", "byte", "case",
1.57 + "catch", "char", "class", "const", "continue", "default",
1.58 + "do", "double", "else", "extends", "false", "final", "finally",
1.59 + "float", "for", "goto", "if", "implements", "import",
1.60 + "instanceof", "int", "interface", "long", "native", "new",
1.61 + "null", "package", "private", "protected", "public",
1.62 + "return", "short", "static", "strictfp", "super",
1.63 + "switch", "synchronized", "this", "throw", "throws",
1.64 + "transient", "true", "try", "void", "volatile", "while"
1.65 + };
1.66 +
1.67 + private static Map<String, String> elements = new HashMap<String, String>();
1.68 + private final ProcessingEnvironment processingEnv;
1.69 + private HtmlModel model = null;
1.70 +
1.71 + ElementGenerator(ProcessingEnvironment processingEnv) {
1.72 + this.processingEnv = processingEnv;
1.73 + }
1.74 +
1.75 + String getType(String pkg, String tag, Element e) {
1.76 + String className = elements.get(tag);
1.77 + if (className == null) {
1.78 + className = createClass(pkg, tag, e);
1.79 + elements.put(tag, className);
1.80 + }
1.81 + return className;
1.82 + }
1.83 +
1.84 + private String createClass(String pkg, String tag, Element e) {
1.85 + String className = className(tag);
1.86 + Writer w;
1.87 + try {
1.88 + FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
1.89 + w = new OutputStreamWriter(java.openOutputStream());
1.90 + try {
1.91 + w.append("package " + pkg + ";\n\n");
1.92 + w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
1.93 + PredefinedFields.appendImports(w, tag);
1.94 + w.append("\n");
1.95 +
1.96 + w.append("class ").append(className).append(" extends Element {\n\n");
1.97 + w.append(" public ").append(className).append("(String id) {\n");
1.98 + w.append(" super(id);\n");
1.99 + w.append(" }\n\n");
1.100 + for (Entry<String, String> entry : getAttributes(tag).entrySet()) {
1.101 + String attrName = entry.getKey();
1.102 + String attrType = entry.getValue();
1.103 + // getter
1.104 + w.append(" public ").append(attrType).append(" ")
1.105 + .append("get").append(className(attrName)).append("() {\n");
1.106 + w.append(" return (").append(attrType).append(")getAttribute(\"")
1.107 + .append(attrName).append("\");\n");
1.108 + w.append(" }\n\n");
1.109 + // setter
1.110 + w.append(" public void ")
1.111 + .append("set").append(className(attrName)).append("(")
1.112 + .append(attrType).append(" ").append(attributeName(attrName)).append(") {\n");
1.113 + w.append(" setAttribute(\"").append(attrName).append("\", ").append(attributeName(attrName)).append(");\n");
1.114 + w.append(" }\n\n");
1.115 + }
1.116 + PredefinedFields.appendFields(w, tag);
1.117 + w.append("}\n");
1.118 + } finally {
1.119 + w.close();
1.120 + }
1.121 + } catch (IOException ex) {
1.122 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + className + ".java", e);
1.123 + return null;
1.124 + }
1.125 + return className;
1.126 + }
1.127 +
1.128 + Map<String, String> getAttributes(String tagName) {
1.129 + Map<String, String> result = new HashMap<String, String>();
1.130 +
1.131 + if (model == null) {
1.132 + // HtmlModelProvider modelProvider = Lookup.getDefault().lookup(HtmlModelProvider.class);
1.133 + ServiceLoader<HtmlModelProvider> hmpLoader =
1.134 + ServiceLoader.load(HtmlModelProvider.class, this.getClass().getClassLoader());
1.135 + for (HtmlModelProvider htmlModelProvider : hmpLoader) {
1.136 + model = htmlModelProvider.getModel(HtmlVersion.HTML5);
1.137 + if (model != null) {
1.138 + break;
1.139 + }
1.140 + }
1.141 + }
1.142 +
1.143 + if (model == null) {
1.144 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR,
1.145 + "HTML 5 model provider was not found on classpath");
1.146 + return Collections.emptyMap();
1.147 + }
1.148 + HtmlTag tag = model.getTag(tagName);
1.149 + for (HtmlTagAttribute attr : tag.getAttributes()) {
1.150 + String name = attr.getName();
1.151 + String type = Attributes.TYPES.get(name);
1.152 + if (type != null) {
1.153 + result.put(name, type);
1.154 + }
1.155 + }
1.156 +
1.157 + return result;
1.158 + }
1.159 +
1.160 + private String className(String s) {
1.161 + if (s.length() == 0) {
1.162 + return s;
1.163 + }
1.164 + String name = NAMING_EXCEPTIONS.get(s.toLowerCase());
1.165 + if (name == null) {
1.166 + name = s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase();
1.167 + }
1.168 + return name;
1.169 + }
1.170 +
1.171 + private String attributeName(String s) {
1.172 + if (Arrays.binarySearch(javaKeywords, s) >= 0) {
1.173 + return String.format("%sAttr", s);
1.174 + }
1.175 + return s;
1.176 + }
1.177 +
1.178 +}