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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.qpid.agent.binding;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class BindingUtils
{
private static Log log = LogFactory.getLog(BindingUtils.class);
public static Object get(PropertyBinding property, Object managed)
{
String name = property.getName();
return get(name, managed);
}
public static void set(PropertyBinding property, Object value,
Object managed)
{
String name = property.getName();
TypeBinding type = property.getType();
try
{
Method meth = managed.getClass().getMethod(accessor("set", name),
type.getJavaClass());
meth.invoke(managed, value);
} catch (NoSuchMethodException e)
{
throw new BindingException(e);
} catch (IllegalAccessException e)
{
throw new BindingException(e);
} catch (InvocationTargetException e)
{
throw new BindingException(e.getTargetException());
}
}
public static Object[] invoke(MethodBinding method, Object managed,
Object... args)
{
log.debug(String.format("Invoking %s on %s", method.getName(), managed
.getClass()));
List<ParameterBinding> in = method.getInParameters();
List<ParameterBinding> out = method.getOutParameters();
Class<?>[] classes = new Class<?>[in.size()];
int idx = 0;
for (ParameterBinding p : in)
{
classes[idx++] = p.getType().getJavaClass();
}
Object result;
try
{
Method meth = managed.getClass().getMethod(method.getName(),
classes);
result = meth.invoke(managed, args);
} catch (NoSuchMethodException e)
{
throw new BindingException(e);
} catch (IllegalAccessException e)
{
throw new BindingException(e);
} catch (InvocationTargetException e)
{
throw new BindingException(e.getTargetException());
}
Object[] results = new Object[out.size()];
// XXX: need better way to distinguish this case
if (out.size() == 1 && out.get(0).getName().equals("result"))
{
results[0] = result;
} else
{
for (int i = 0; i < results.length; i++)
{
results[i] = get(out.get(i).getName(), result);
}
}
return results;
}
public static String accessor(String pfx, String property)
{
return pfx + Character.toUpperCase(property.charAt(0))
+ property.substring(1);
}
public static Object get(String name, Object obj)
{
Object returnValue = null;
try
{
BeanInfo info = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] pds = info.getPropertyDescriptors();
for (PropertyDescriptor pd : pds)
{
if (pd.getName().equals(name))
{
Method getMethod = pd.getReadMethod();
returnValue = getMethod.invoke(obj);
break;
}
}
} catch (Exception e)
{
throw new BindingException(e);
}
return returnValue;
}
}
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