// Copyright 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.annotations;
import java.lang.reflect.Method;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.HiveMind;
import org.apache.hivemind.Location;
import org.apache.tapestry.enhance.EnhancementOperation;
import org.apache.tapestry.spec.BindingSpecification;
import org.apache.tapestry.spec.BindingType;
import org.apache.tapestry.spec.ContainedComponent;
import org.apache.tapestry.spec.IBindingSpecification;
import org.apache.tapestry.spec.IComponentSpecification;
import org.apache.tapestry.spec.IContainedComponent;
/**
* Adds a {@link org.apache.tapestry.spec.IContainedComponent} to the
* {@link org.apache.tapestry.spec.IComponentSpecification}.
*
* @author Howard Lewis Ship
* @since 4.0
* @see Component
*/
public class ComponentAnnotationWorker implements MethodAnnotationEnhancementWorker
{
public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
Method method, Location location)
{
Component component = method.getAnnotation(Component.class);
String propertyName = AnnotationUtils.getPropertyName(method);
String type = component.type();
String copyOf = component.copyOf();
boolean hasCopyOf = HiveMind.isNonBlank(copyOf);
if (hasCopyOf)
{
if (HiveMind.isNonBlank(type))
throw new ApplicationRuntimeException(AnnotationMessages.bothTypeAndCopyOf(propertyName));
type = null;
}
else
{
if (type.equals(""))
{
Class retTypeClazz = method.getReturnType();
type = resolveComponentType(retTypeClazz);
}
copyOf = null;
}
IContainedComponent cc = new ContainedComponent();
cc.setInheritInformalParameters(component.inheritInformalParameters());
cc.setType(type);
cc.setCopyOf(copyOf);
cc.setPropertyName(propertyName);
cc.setLocation(location);
for (String binding : component.bindings())
{
addBinding(cc, binding, location);
}
String id = component.id();
if (id.equals(""))
id = propertyName;
spec.addComponent(id, cc);
if (hasCopyOf)
{
IContainedComponent source = spec.getComponent(copyOf);
if (source != null)
AnnotationUtils.copyBindings(source, cc);
}
}
protected String resolveComponentType(Class retTypeClass)
{
return retTypeClass.getSimpleName();
}
void addBinding(IContainedComponent component, String binding, Location location)
{
int equalsx = binding.indexOf('=');
if (equalsx < 1)
invalidBinding(binding);
if (equalsx + 1 >= binding.length())
invalidBinding(binding);
String name = binding.substring(0, equalsx).trim();
String value = binding.substring(equalsx + 1).trim();
IBindingSpecification bs = new BindingSpecification();
bs.setType(BindingType.PREFIXED);
bs.setValue(value);
bs.setLocation(location);
component.setBinding(name, bs);
}
protected void invalidBinding(String binding)
{
throw new ApplicationRuntimeException(AnnotationMessages.bindingWrongFormat(binding));
}
}