2 * HTML via Java(tm) Language Bindings
3 * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details. apidesign.org
13 * designates this particular file as subject to the
14 * "Classpath" exception as provided by apidesign.org
15 * in the License file that accompanied this code.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. Look for COPYING file in the top folder.
19 * If not, see http://wiki.apidesign.org/wiki/GPLwithClassPathException
21 package org.apidesign.html.boot.impl;
23 import java.lang.reflect.Method;
25 import java.util.ArrayList;
26 import java.util.Collections;
27 import java.util.Enumeration;
28 import java.util.List;
29 import org.apidesign.html.boot.spi.Fn;
30 import org.objectweb.asm.Type;
34 * @author Jaroslav Tulach <jtulach@netbeans.org>
36 public final class FnUtils {
40 public static Fn define(Class<?> caller, String code, String... names) {
41 JsClassLoader cl = (JsClassLoader)caller.getClassLoader();
42 return cl.defineFn(code, names);
45 public static ClassLoader newLoader(final FindResources f, final Fn.Presenter d, ClassLoader parent) {
46 return new JsClassLoader(parent) {
48 protected URL findResource(String name) {
49 List<URL> l = res(name, true);
50 return l.isEmpty() ? null : l.get(0);
54 protected Enumeration<URL> findResources(String name) {
55 return Collections.enumeration(res(name, false));
58 private List<URL> res(String name, boolean oneIsEnough) {
59 List<URL> l = new ArrayList<URL>();
60 f.findResources(name, l, oneIsEnough);
65 protected Fn defineFn(String code, String... names) {
66 return d.defineFn(code, names);
71 static String callback(String body, ClassLoader loader) {
73 return callbackImpl(body, loader);
74 } catch (ClassNotFoundException ex) {
75 throw new IllegalStateException("Can't parse " + body, ex);
76 } catch (NoSuchMethodException ex) {
77 throw new IllegalStateException("Can't parse " + body, ex);
81 private static String callbackImpl(String body, ClassLoader loader)
82 throws ClassNotFoundException, NoSuchMethodException {
83 StringBuilder sb = new StringBuilder();
86 int next = body.indexOf(".@", pos);
88 sb.append(body.substring(pos));
91 sb.append(body.substring(pos, next));
93 int sigBeg = body.indexOf('(', next);
94 int sigEnd = body.indexOf(')', sigBeg);
96 int colon4 = body.indexOf("::", next);
98 if (sigBeg == -1 || sigEnd == -1 || colon4 == -1) {
99 throw new IllegalStateException("Malformed body " + body);
102 String fqn = body.substring(next + 2, colon4);
103 String method = body.substring(colon4 + 2, sigBeg);
104 String params = body.substring(sigBeg, sigEnd + 1);
106 Class<?> clazz = Class.forName(fqn, false, loader);
107 final Type[] argTps = Type.getArgumentTypes(params);
108 Class<?>[] argCls = new Class<?>[argTps.length];
109 for (int i = 0; i < argCls.length; i++) {
110 argCls[i] = toClass(argTps[i], loader);
112 Method m = clazz.getMethod(method, argCls);
114 sb.append("['").append(m.getName()).append("(");
116 for (Class<?> pt : m.getParameterTypes()) {
117 sb.append(sep).append(pt.getName());
126 private static Class<?> toClass(final Type t, ClassLoader loader) throws ClassNotFoundException {
127 if (t == Type.INT_TYPE) {
129 } else if (t == Type.VOID_TYPE) {
131 } else if (t == Type.BOOLEAN_TYPE) {
133 } else if (t == Type.BYTE_TYPE) {
135 } else if (t == Type.CHAR_TYPE) {
136 return Character.TYPE;
137 } else if (t == Type.SHORT_TYPE) {
139 } else if (t == Type.DOUBLE_TYPE) {
141 } else if (t == Type.FLOAT_TYPE) {
143 } else if (t == Type.LONG_TYPE) {
146 return Class.forName(t.getClassName(), false, loader);