| // Copyright 2006, 2007 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.tapestry.ioc.internal; |
| |
| import org.apache.tapestry.ioc.Configuration; |
| import org.apache.tapestry.ioc.def.ContributionDef; |
| import org.slf4j.Logger; |
| |
| /** |
| * Performs some validation before delegating to another Configuration. |
| */ |
| public class ValidatingConfigurationWrapper<T> implements Configuration<T> |
| { |
| private final String serviceId; |
| |
| private final ContributionDef contributionDef; |
| |
| private final Logger logger; |
| |
| private final Configuration<T> delegate; |
| |
| private final Class expectedType; |
| |
| // Need a strategy for determing the right order for this mass of parameters! |
| |
| public ValidatingConfigurationWrapper(String serviceId, Logger logger, Class expectedType, |
| ContributionDef contributionDef, Configuration<T> delegate) |
| { |
| this.serviceId = serviceId; |
| this.logger = logger; |
| this.expectedType = expectedType; |
| this.contributionDef = contributionDef; |
| this.delegate = delegate; |
| } |
| |
| public void add(T object) |
| { |
| if (object == null) |
| { |
| logger.warn(IOCMessages.contributionWasNull(serviceId, contributionDef)); |
| return; |
| } |
| |
| // Sure, we say it is type T ... but is it really? |
| |
| if (!expectedType.isInstance(object)) |
| { |
| logger.warn(IOCMessages.contributionWrongValueType( |
| serviceId, |
| contributionDef, |
| object.getClass(), |
| expectedType)); |
| return; |
| } |
| |
| delegate.add(object); |
| } |
| |
| } |