2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.emul.reflect;
20 import java.lang.reflect.Array;
21 import java.lang.reflect.Constructor;
22 import java.lang.reflect.Method;
23 import java.util.Enumeration;
24 import org.apidesign.bck2brwsr.core.Exported;
25 import org.apidesign.bck2brwsr.core.JavaScriptBody;
27 /** Utilities to work on methods.
29 * @author Jaroslav Tulach <jtulach@netbeans.org>
31 public abstract class MethodImpl {
32 public static MethodImpl INSTANCE;
35 Class.forName(Method.class.getName());
36 } catch (ClassNotFoundException ex) {
37 throw new IllegalStateException(ex);
41 protected abstract Method create(Class<?> declaringClass, String name, Object data, String sig);
42 protected abstract Constructor create(Class<?> declaringClass, Object data, String sig);
46 // bck2brwsr implementation
49 @JavaScriptBody(args = {"clazz", "prefix", "cnstr"},
51 + "var c = clazz.cnstr;\n"
52 + "if (!cnstr) c = c.prototype;\n"
53 + "var arr = new Array();\n"
54 + "function check(m) {\n"
55 + " if (m.indexOf(prefix) === 0) {\n"
56 + " if (!c[m].cls) return;\n"
58 + " arr.push(c[m]);\n"
59 + " arr.push(c[m].cls.$class);\n"
65 + "check('wait__V');\n"
66 + "check('wait__VJ');\n"
67 + "check('wait__VJI');\n"
68 + "check('equals__ZLjava_lang_Object_2');\n"
69 + "check('toString__Ljava_lang_String_2');\n"
70 + "check('hashCode__I');\n"
71 + "check('getClass__Ljava_lang_Class_2');\n"
72 + "check('notify__V');\n"
73 + "check('notifyAll__V');\n"
75 private static native Object[] findMethodData(
76 Class<?> clazz, String prefix, boolean cnstr);
78 public static Constructor findConstructor(
79 Class<?> clazz, Class<?>... parameterTypes) {
80 Object[] data = findMethodData(clazz, "cons__", true);
81 BIG: for (int i = 0; i < data.length; i += 3) {
82 String sig = ((String) data[i]).substring(6);
83 Class<?> cls = (Class<?>) data[i + 2];
84 Constructor tmp = INSTANCE.create(cls, data[i + 1], sig);
85 Class<?>[] tmpParms = tmp.getParameterTypes();
86 if (parameterTypes.length != tmpParms.length) {
89 for (int j = 0; j < tmpParms.length; j++) {
90 if (!parameterTypes[j].equals(tmpParms[j])) {
99 public static Constructor[] findConstructors(Class<?> clazz, int mask) {
100 Object[] namesAndData = findMethodData(clazz, "", true);
102 for (int i = 0; i < namesAndData.length; i += 3) {
103 String sig = (String) namesAndData[i];
104 Object data = namesAndData[i + 1];
105 if (!sig.startsWith("cons__")) {
108 sig = sig.substring(6);
109 Class<?> cls = (Class<?>) namesAndData[i + 2];
110 final Constructor m = INSTANCE.create(cls, data, sig);
111 if ((m.getModifiers() & mask) == 0) {
114 namesAndData[cnt++] = m;
116 Constructor[] arr = new Constructor[cnt];
117 for (int i = 0; i < cnt; i++) {
118 arr[i] = (Constructor) namesAndData[i];
122 public static Method findMethod(
123 Class<?> clazz, String name, Class<?>... parameterTypes) {
124 Object[] data = findMethodData(clazz, name + "__", false);
125 BIG: for (int i = 0; i < data.length; i += 3) {
126 String sig = ((String) data[i]).substring(name.length() + 2);
127 Class<?> cls = (Class<?>) data[i + 2];
128 Method tmp = INSTANCE.create(cls, name, data[i + 1], sig);
129 Class<?>[] tmpParms = tmp.getParameterTypes();
130 if (parameterTypes.length != tmpParms.length) {
133 for (int j = 0; j < tmpParms.length; j++) {
134 if (!parameterTypes[j].equals(tmpParms[j])) {
143 public static Method[] findMethods(Class<?> clazz, int mask) {
144 Object[] namesAndData = findMethodData(clazz, "", false);
146 for (int i = 0; i < namesAndData.length; i += 3) {
147 String sig = (String) namesAndData[i];
148 Object data = namesAndData[i + 1];
149 int middle = sig.indexOf("__");
153 if (sig.startsWith("$") && sig.endsWith("$")) {
154 // produced by Closure compiler in debug mode
155 // needs to be ignored
158 String name = sig.substring(0, middle);
159 sig = sig.substring(middle + 2);
160 Class<?> cls = (Class<?>) namesAndData[i + 2];
161 final Method m = INSTANCE.create(cls, name, data, sig);
162 if ((m.getModifiers() & mask) == 0) {
165 namesAndData[cnt++] = m;
167 Method[] arr = new Method[cnt];
168 for (int i = 0; i < cnt; i++) {
169 arr[i] = (Method) namesAndData[i];
174 @Exported static String toSignature(Method m) {
175 StringBuilder sb = new StringBuilder();
176 sb.append(m.getName()).append("__");
177 appendType(sb, m.getReturnType());
178 Class<?>[] arr = m.getParameterTypes();
179 for (int i = 0; i < arr.length; i++) {
180 appendType(sb, arr[i]);
182 return sb.toString();
185 private static void appendType(StringBuilder sb, Class<?> type) {
186 if (type == Integer.TYPE) {
190 if (type == Long.TYPE) {
194 if (type == Double.TYPE) {
198 if (type == Float.TYPE) {
202 if (type == Byte.TYPE) {
206 if (type == Boolean.TYPE) {
210 if (type == Short.TYPE) {
214 if (type == Void.TYPE) {
218 if (type == Character.TYPE) {
222 if (type.isArray()) {
224 appendType(sb, type.getComponentType());
227 sb.append('L').append(type.getName().replace('.', '_'));
231 public static int signatureElements(String sig) {
232 Enumeration<Class> en = signatureParser(sig);
234 while (en.hasMoreElements()) {
241 public static Enumeration<Class> signatureParser(final String sig) {
242 class E implements Enumeration<Class> {
248 while (sig.charAt(len - 1) == '$') {
253 public boolean hasMoreElements() {
257 public Class nextElement() {
258 switch (sig.charAt(pos++)) {
276 return Character.TYPE;
279 int up = sig.indexOf("_2", pos);
280 String type = sig.substring(pos, up);
282 return Class.forName(type.replace('_', '.'));
283 } catch (ClassNotFoundException ex) {
284 throw new IllegalStateException(ex);
287 char nch = sig.charAt(pos++);
288 assert nch == '3' : "Can't find '3' at " + sig.substring(pos - 1);
289 final Class compType = nextElement();
290 return Array.newInstance(compType, 0).getClass();
293 throw new UnsupportedOperationException(sig + " at " + pos);