| // Copyright 2004 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.pageload; |
| |
| import java.util.Iterator; |
| |
| import org.apache.tapestry.ApplicationRuntimeException; |
| import org.apache.tapestry.IComponent; |
| import org.apache.tapestry.Tapestry; |
| import org.apache.tapestry.spec.IComponentSpecification; |
| import org.apache.tapestry.spec.IParameterSpecification; |
| |
| /** |
| * Verify whether all required parameters in the examined component are bound, |
| * and if they are not, throw an exception. |
| * |
| * @author mindbridge |
| * @version $Id$ |
| * @since 3.0 |
| */ |
| public class VerifyRequiredParametersVisitor implements IComponentVisitor |
| { |
| /** |
| * @see org.apache.tapestry.pageload.IComponentVisitor#visitComponent(org.apache.tapestry.IComponent) |
| */ |
| public void visitComponent(IComponent component) |
| { |
| IComponentSpecification spec = component.getSpecification(); |
| |
| Iterator i = spec.getParameterNames().iterator(); |
| |
| while (i.hasNext()) |
| { |
| String name = (String) i.next(); |
| IParameterSpecification parameterSpec = spec.getParameter(name); |
| |
| if (parameterSpec.isRequired() && component.getBinding(name) == null) |
| throw new ApplicationRuntimeException( |
| Tapestry.format( |
| "PageLoader.required-parameter-not-bound", |
| name, |
| component.getExtendedId()), |
| component, |
| component.getLocation(), |
| null); |
| } |
| } |
| |
| } |