ReflectionCache.java

/**
 * Copyright 2008 - 2015 The Loon Game Engine Authors
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loon
 * @author cping
 * @email：javachenpeng@yahoo.com
 * @version 0.5
 */
package loon.gwtref.client;

import com.google.gwt.core.client.GWT;

@SuppressWarnings("rawtypes")
public class ReflectionCache {
	private static IReflectionCache instance = GWT
			.create(IReflectionCache.class);

	public static Type forName(String name) throws ClassNotFoundException {
		Type type = instance.forName(convert(name));
		if (type == null) {
			throw new RuntimeException("Couldn't find Type for class '" + name
					+ "'");
		}
		return type;
	}

	public static Type getType(Class clazz) {
		if (clazz == null)
			return null;
		Type type = instance.forName(convert(clazz.getName()));
		if (type == null) {
			throw new RuntimeException("Couldn't find Type for class '"
					+ clazz.getName() + "'");
		}
		return type;
	}

	private static String convert(String className) {
		if (className.startsWith("[")) {
			int dimensions = 0;
			char c = className.charAt(0);
			String suffix = "";
			while (c == '[') {
				dimensions++;
				suffix += "[]";
				c = className.charAt(dimensions);
			}
			char t = className.charAt(dimensions);
			switch (t) {
			case 'Z':
				return "boolean" + suffix;
			case 'B':
				return "byte" + suffix;
			case 'C':
				return "char" + suffix;
			case 'L':
				return className.substring(dimensions + 1,
						className.length() - 1).replace('$', '.')
						+ suffix;
			case 'D':
				return "double" + suffix;
			case 'F':
				return "float" + suffix;
			case 'I':
				return "int" + suffix;
			case 'J':
				return "long" + suffix;
			case 'S':
				return "short" + suffix;
			default:
				throw new IllegalArgumentException("Couldn't transform '"
						+ className + "' to qualified source name");
			}
		} else {
			return className.replace('$', '.');
		}
	}

	public static Object newArray(Class componentType, int size) {
		return instance.newArray(getType(componentType), size);
	}

	public static Object getFieldValue(Field field, Object obj)
			throws IllegalAccessException {
		return instance.get(field, obj);
	}

	public static void setFieldValue(Field field, Object obj, Object value)
			throws IllegalAccessException {
		instance.set(field, obj, value);
	}

	public static Object invoke(Method method, Object obj, Object[] params) {
		return instance.invoke(method, obj, params);
	}

	public static int getArrayLength(Type type, Object obj) {
		return instance.getArrayLength(type, obj);
	}

	public static Object getArrayElement(Type type, Object obj, int i) {
		return instance.getArrayElement(type, obj, i);
	}

	public static void setArrayElement(Type type, Object obj, int i,
			Object value) {
		instance.setArrayElement(type, obj, i, value);
	}
}