// Copyright 2004, 2005 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.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.IComponent;
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
* @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(
PageloadMessages.requiredParameterNotBound(name, component),
component,
component.getLocation(),
null);
}
}
}