InterfaceRenderer Full java source on the tutorial

Code of InterfaceRenderer

package org.jproggy.examples.intfgen.snippetory; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.util.Collection; import java.util.HashSet; import java.util.Set; import java.util.TreeSet; import org.jproggy.snippetory.Template; import org.jproggy.snippetory.TemplateContext; public class InterfaceRenderer { private Set<String> types = new TreeSet<String>(); private Collection<String> availablePackages = new HashSet<String>(); public static void main(String[] args) throws Exception { Class<?> intf = Class.forName(args[1]); Template intfTpl = new TemplateContext().parseResource(args[0]); new InterfaceRenderer().render(intf, intfTpl); intfTpl.render(System.out); } public void render(Class<?> intf, Template intfTpl) throws Exception { availablePackages.add("java.lang"); availablePackages.add(intf.getPackage().getName()); intfTpl.set("name", intf.getSimpleName()); intfTpl.set("package", intf.getPackage().getName()); for (Class<?> parent : intf.getInterfaces()) { registerType(parent); intfTpl.append("parents", parent.getSimpleName()); } for (Field field : intf.getDeclaredFields()) { renderField(intfTpl, field); } for (Method method : intf.getDeclaredMethods()) { renderMethod(intfTpl.get("method"), method); } renderImports(intfTpl, types); // allow rendering multiple classes availablePackages.clear(); types.clear(); } private void renderField(Template intfTpl, Field field) throws Exception { Class<?> type = field.getType(); registerType(type); String fieldTplName = fieldTplName(type); if (fieldTplName != null) { Template fieldTpl = intfTpl.get(fieldTplName); fieldTpl.set("name", field.getName()); fieldTpl.set("type", type.getSimpleName()); fieldTpl.set("value", field.get(null)); fieldTpl.render(); } } private String fieldTplName(Class<?> type) { if (String.class.equals(type)) { return "string_field"; } if (Number.class.isAssignableFrom(type) || type.isPrimitive()) return "num_field"; return null; } private void renderMethod(Template methodTpl, Method method) { Class<?> returnType = method.getReturnType(); registerType(returnType); methodTpl.set("name", method.getName()); methodTpl.set("return_type", returnType.getSimpleName()); for (int i = 0; i < method.getParameterTypes().length; i++) { Class<?> type = method.getParameterTypes()[i]; registerType(type); Template parameter = methodTpl.get("parameters"); parameter.set("type", type.getSimpleName()); parameter.set("i", i); parameter.render(); } for (Class<?> ex : method.getExceptionTypes()) { registerType(ex); methodTpl.append("exceptions", ex.getSimpleName()); } methodTpl.render(); } private static void renderImports(Template intfTpl, Set<String> types) { String oldPrefix = ""; for (String type : types) { String prefix = type.split("\\.")[0]; if (!oldPrefix.equals(prefix)) { if (!"".equals(oldPrefix)) intfTpl.append("imports", "\n"); oldPrefix = prefix; } intfTpl.get("imports").set("import", type).render(); } } private void registerType(Class<?> type) { if (!type.isPrimitive() && !Void.TYPE.equals(type) && !availablePackages.contains(type.getPackage().getName())) { types.add(type.getName()); } } }