// Copyright 2012 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.ioc.internal.services;
import org.apache.tapestry5.ioc.MethodAdviceReceiver;
import org.apache.tapestry5.ioc.OperationTracker;
import org.apache.tapestry5.ioc.annotations.Operation;
import org.apache.tapestry5.ioc.annotations.PreventServiceDecoration;
import org.apache.tapestry5.ioc.internal.util.InternalUtils;
import org.apache.tapestry5.ioc.services.OperationAdvisor;
import org.apache.tapestry5.plastic.MethodAdvice;
import org.apache.tapestry5.plastic.MethodInvocation;
import java.lang.reflect.Method;
@PreventServiceDecoration
public class OperationAdvisorImpl implements OperationAdvisor
{
private final OperationTracker tracker;
public OperationAdvisorImpl(OperationTracker tracker)
{
this.tracker = tracker;
}
private Runnable toRunnable(final MethodInvocation invocation)
{
return new Runnable()
{
@Override
public void run()
{
invocation.proceed();
}
};
}
private class SimpleAdvice implements MethodAdvice
{
private final String description;
SimpleAdvice(String description)
{
this.description = description;
}
@Override
public void advise(MethodInvocation invocation)
{
tracker.run(description, toRunnable(invocation));
}
}
private class FormattedAdvice implements MethodAdvice
{
private final String format;
FormattedAdvice(String format)
{
this.format = format;
}
@Override
public void advise(MethodInvocation invocation)
{
Object[] parameters = extractParameters(invocation);
String description = String.format(format, parameters);
tracker.run(description, toRunnable(invocation));
}
private Object[] extractParameters(MethodInvocation invocation)
{
int count = invocation.getMethod().getParameterTypes().length;
Object[] result = new Object[count];
for (int i = 0; i < count; i++)
{
result[i] = invocation.getParameter(i);
}
return result;
}
}
@Override
public void addOperationAdvice(MethodAdviceReceiver receiver)
{
for (Method m : receiver.getInterface().getMethods())
{
Operation annotation = receiver.getMethodAnnotation(m, Operation.class);
if (annotation != null)
{
String value = annotation.value();
receiver.adviseMethod(m, createAdvice(value));
}
}
}
@Override
public MethodAdvice createAdvice(String description)
{
assert InternalUtils.isNonBlank(description);
if (description.contains("%"))
{
return new FormattedAdvice(description);
}
return new SimpleAdvice(description);
}
}