1.1 --- a/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/reflect/MethodImpl.java Tue Feb 26 14:55:55 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,224 +0,0 @@
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.emul.reflect;
1.22 -
1.23 -import java.lang.reflect.Array;
1.24 -import java.lang.reflect.Method;
1.25 -import java.util.Enumeration;
1.26 -import org.apidesign.bck2brwsr.core.JavaScriptBody;
1.27 -
1.28 -/** Utilities to work on methods.
1.29 - *
1.30 - * @author Jaroslav Tulach <jtulach@netbeans.org>
1.31 - */
1.32 -public abstract class MethodImpl {
1.33 - public static MethodImpl INSTANCE;
1.34 - static {
1.35 - try {
1.36 - Class.forName(Method.class.getName());
1.37 - } catch (ClassNotFoundException ex) {
1.38 - throw new IllegalStateException(ex);
1.39 - }
1.40 - }
1.41 -
1.42 - protected abstract Method create(Class<?> declaringClass, String name, Object data, String sig);
1.43 -
1.44 -
1.45 - //
1.46 - // bck2brwsr implementation
1.47 - //
1.48 -
1.49 - @JavaScriptBody(args = {"clazz", "prefix"},
1.50 - body = ""
1.51 - + "var c = clazz.cnstr.prototype;"
1.52 - + "var arr = new Array();\n"
1.53 - + "for (m in c) {\n"
1.54 - + " if (m.indexOf(prefix) === 0) {\n"
1.55 - + " if (!c[m].cls) continue;\n"
1.56 - + " arr.push(m);\n"
1.57 - + " arr.push(c[m]);\n"
1.58 - + " arr.push(c[m].cls.$class);\n"
1.59 - + " }"
1.60 - + "}\n"
1.61 - + "return arr;")
1.62 - private static native Object[] findMethodData(
1.63 - Class<?> clazz, String prefix);
1.64 -
1.65 - public static Method findMethod(
1.66 - Class<?> clazz, String name, Class<?>... parameterTypes) {
1.67 - Object[] data = findMethodData(clazz, name + "__");
1.68 - BIG: for (int i = 0; i < data.length; i += 3) {
1.69 - String sig = ((String) data[i]).substring(name.length() + 2);
1.70 - Class<?> cls = (Class<?>) data[i + 2];
1.71 - Method tmp = INSTANCE.create(cls, name, data[i + 1], sig);
1.72 - Class<?>[] tmpParms = tmp.getParameterTypes();
1.73 - if (parameterTypes.length != tmpParms.length) {
1.74 - continue;
1.75 - }
1.76 - for (int j = 0; j < tmpParms.length; j++) {
1.77 - if (!parameterTypes[j].equals(tmpParms[j])) {
1.78 - continue BIG;
1.79 - }
1.80 - }
1.81 - return tmp;
1.82 - }
1.83 - return null;
1.84 - }
1.85 -
1.86 - public static Method[] findMethods(Class<?> clazz, int mask) {
1.87 - Object[] namesAndData = findMethodData(clazz, "");
1.88 - int cnt = 0;
1.89 - for (int i = 0; i < namesAndData.length; i += 3) {
1.90 - String sig = (String) namesAndData[i];
1.91 - Object data = namesAndData[i + 1];
1.92 - int middle = sig.indexOf("__");
1.93 - if (middle == -1) {
1.94 - continue;
1.95 - }
1.96 - String name = sig.substring(0, middle);
1.97 - sig = sig.substring(middle + 2);
1.98 - Class<?> cls = (Class<?>) namesAndData[i + 2];
1.99 - final Method m = INSTANCE.create(cls, name, data, sig);
1.100 - if ((m.getModifiers() & mask) == 0) {
1.101 - continue;
1.102 - }
1.103 - namesAndData[cnt++] = m;
1.104 - }
1.105 - Method[] arr = new Method[cnt];
1.106 - for (int i = 0; i < cnt; i++) {
1.107 - arr[i] = (Method) namesAndData[i];
1.108 - }
1.109 - return arr;
1.110 - }
1.111 - static String toSignature(Method m) {
1.112 - StringBuilder sb = new StringBuilder();
1.113 - sb.append(m.getName()).append("__");
1.114 - appendType(sb, m.getReturnType());
1.115 - Class<?>[] arr = m.getParameterTypes();
1.116 - for (int i = 0; i < arr.length; i++) {
1.117 - appendType(sb, arr[i]);
1.118 - }
1.119 - return sb.toString();
1.120 - }
1.121 -
1.122 - private static void appendType(StringBuilder sb, Class<?> type) {
1.123 - if (type == Integer.TYPE) {
1.124 - sb.append('I');
1.125 - return;
1.126 - }
1.127 - if (type == Long.TYPE) {
1.128 - sb.append('J');
1.129 - return;
1.130 - }
1.131 - if (type == Double.TYPE) {
1.132 - sb.append('D');
1.133 - return;
1.134 - }
1.135 - if (type == Float.TYPE) {
1.136 - sb.append('F');
1.137 - return;
1.138 - }
1.139 - if (type == Byte.TYPE) {
1.140 - sb.append('B');
1.141 - return;
1.142 - }
1.143 - if (type == Boolean.TYPE) {
1.144 - sb.append('Z');
1.145 - return;
1.146 - }
1.147 - if (type == Short.TYPE) {
1.148 - sb.append('S');
1.149 - return;
1.150 - }
1.151 - if (type == Void.TYPE) {
1.152 - sb.append('V');
1.153 - return;
1.154 - }
1.155 - if (type == Character.TYPE) {
1.156 - sb.append('C');
1.157 - return;
1.158 - }
1.159 - if (type.isArray()) {
1.160 - sb.append("_3");
1.161 - appendType(sb, type.getComponentType());
1.162 - return;
1.163 - }
1.164 - sb.append('L').append(type.getName().replace('.', '_'));
1.165 - sb.append("_2");
1.166 - }
1.167 -
1.168 - public static int signatureElements(String sig) {
1.169 - Enumeration<Class> en = signatureParser(sig);
1.170 - int cnt = 0;
1.171 - while (en.hasMoreElements()) {
1.172 - en.nextElement();
1.173 - cnt++;
1.174 - }
1.175 - return cnt;
1.176 - }
1.177 -
1.178 - public static Enumeration<Class> signatureParser(final String sig) {
1.179 - class E implements Enumeration<Class> {
1.180 - int pos;
1.181 -
1.182 - public boolean hasMoreElements() {
1.183 - return pos < sig.length();
1.184 - }
1.185 -
1.186 - public Class nextElement() {
1.187 - switch (sig.charAt(pos++)) {
1.188 - case 'I':
1.189 - return Integer.TYPE;
1.190 - case 'J':
1.191 - return Long.TYPE;
1.192 - case 'D':
1.193 - return Double.TYPE;
1.194 - case 'F':
1.195 - return Float.TYPE;
1.196 - case 'B':
1.197 - return Byte.TYPE;
1.198 - case 'Z':
1.199 - return Boolean.TYPE;
1.200 - case 'S':
1.201 - return Short.TYPE;
1.202 - case 'V':
1.203 - return Void.TYPE;
1.204 - case 'C':
1.205 - return Character.TYPE;
1.206 - case 'L':
1.207 - try {
1.208 - int up = sig.indexOf("_2", pos);
1.209 - String type = sig.substring(pos, up);
1.210 - pos = up + 2;
1.211 - return Class.forName(type.replace('_', '.'));
1.212 - } catch (ClassNotFoundException ex) {
1.213 - throw new IllegalStateException(ex);
1.214 - }
1.215 - case '_': {
1.216 - char nch = sig.charAt(pos++);
1.217 - assert nch == '3' : "Can't find '3' at " + sig.substring(pos - 1);
1.218 - final Class compType = nextElement();
1.219 - return Array.newInstance(compType, 0).getClass();
1.220 - }
1.221 - }
1.222 - throw new UnsupportedOperationException(sig + " at " + pos);
1.223 - }
1.224 - }
1.225 - return new E();
1.226 - }
1.227 -}