/******************************************************************************* * Copyright (c) 2011 Luaj.org. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. ******************************************************************************/ package org.luaj.vm2.lib.jse; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import org.luaj.vm2.LuaValue; /** * LuaValue that represents a Java class. * <p> * Will respond to get() and set() by returning field values, or java methods. * <p> * This class is not used directly. * It is returned by calls to {@link CoerceJavaToLua#coerce(Object)} * when a Class is supplied. * @see CoerceJavaToLua * @see CoerceLuaToJava */ public class JavaClass extends JavaInstance implements CoerceJavaToLua.Coercion { static final Map classes = Collections.synchronizedMap(new HashMap()); static final LuaValue NEW = valueOf("new"); Map fields; Map methods; public static JavaClass forClass(Class c) { JavaClass j = (JavaClass) classes.get(c); if ( j == null ) classes.put( c, j = new JavaClass(c) ); return j; } JavaClass(Class c) { super(c); this.jclass = this; } public LuaValue coerce(Object javaValue) { return this; } Field getField(LuaValue key) { if ( fields == null ) { Map m = new HashMap(); Field[] f = ((Class)m_instance).getFields(); for ( int i=0; i<f.length; i++ ) { Field fi = f[i]; if ( Modifier.isPublic(fi.getModifiers()) ) { m.put( LuaValue.valueOf(fi.getName()), fi ); try { if (!fi.isAccessible()) fi.setAccessible(true); } catch (SecurityException s) { } } } fields = m; } return (Field) fields.get(key); } LuaValue getMethod(LuaValue key) { if ( methods == null ) { Map namedlists = new HashMap(); Method[] m = ((Class)m_instance).getMethods(); for ( int i=0; i<m.length; i++ ) { Method mi = m[i]; if ( Modifier.isPublic( mi.getModifiers()) ) { String name = mi.getName(); List list = (List) namedlists.get(name); if ( list == null ) { namedlists.put(name, list = new ArrayList()); } JavaMethod method = JavaMethod.forMethod(mi); if(method != null) {//FIXME by song, 做保护 list.add(method); } } } Map map = new HashMap(); Constructor[] c = ((Class)m_instance).getConstructors(); List list = new ArrayList(); for ( int i=0; i<c.length; i++ ) if ( Modifier.isPublic(c[i].getModifiers()) ) list.add( JavaConstructor.forConstructor(c[i]) ); switch ( list.size() ) { case 0: break; case 1: map.put(NEW, list.get(0)); break; default: map.put(NEW, JavaConstructor.forConstructors( (JavaConstructor[])list.toArray(new JavaConstructor[list.size()]) ) ); break; } for ( Iterator it=namedlists.entrySet().iterator(); it.hasNext(); ) { Entry e = (Entry) it.next(); String name = (String) e.getKey(); List methods = (List) e.getValue(); map.put( LuaValue.valueOf(name), methods.size()==1? methods.get(0): JavaMethod.forMethods( (JavaMethod[])methods.toArray(new JavaMethod[methods.size()])) ); } methods = map; } return (LuaValue) methods.get(key); } public LuaValue getConstructor() { return getMethod(NEW); } }