| // Copyright 2008, 2010 The Apache Software Foundation |
| // |
| // 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. |
| |
| package org.apache.tapestry5.internal.services; |
| |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.ioc.services.ClassFabUtils; |
| import org.apache.tapestry5.ioc.services.ClassFactory; |
| import org.apache.tapestry5.ioc.services.TypeCoercer; |
| import org.apache.tapestry5.services.ComponentLayer; |
| import org.apache.tapestry5.services.InvalidationListener; |
| |
| import java.util.Map; |
| |
| public class ComponentClassCacheImpl implements ComponentClassCache, InvalidationListener |
| { |
| private final Map<String, Class> cache = CollectionFactory.newConcurrentMap(); |
| |
| private final ClassFactory classFactory; |
| |
| private final TypeCoercer typeCoercer; |
| |
| public ComponentClassCacheImpl(@ComponentLayer |
| ClassFactory classFactory, TypeCoercer typeCoercer) |
| { |
| this.classFactory = classFactory; |
| this.typeCoercer = typeCoercer; |
| } |
| |
| public void objectWasInvalidated() |
| { |
| cache.clear(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public Object defaultValueForType(String className) |
| { |
| Class clazz = forName(className); |
| |
| if (!clazz.isPrimitive()) |
| return null; |
| |
| // Remembering that 0 coerces to boolean false, this covers all the primitive |
| // types (boolean, int, short, etc.) |
| return typeCoercer.coerce(0, clazz); |
| } |
| |
| public Class forName(String className) |
| { |
| Class result = cache.get(className); |
| |
| if (result == null) |
| { |
| result = lookupClassForType(className); |
| |
| cache.put(className, result); |
| } |
| |
| return result; |
| } |
| |
| private Class lookupClassForType(String className) |
| { |
| if (className.equals("void")) |
| return void.class; |
| |
| if (ClassFabUtils.isPrimitiveType(className)) |
| return ClassFabUtils.getPrimitiveType(className); |
| |
| // This step is necessary to handle primitives arrays. |
| |
| String jvmName = ClassFabUtils.toJVMBinaryName(className); |
| |
| ClassLoader componentLoader = classFactory.getClassLoader(); |
| |
| try |
| { |
| return Class.forName(jvmName, true, componentLoader); |
| } |
| catch (ClassNotFoundException ex) |
| { |
| throw new RuntimeException(ex); |
| } |
| } |
| } |