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package com.vaadin.data.util;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.vaadin.data.Property;
import com.vaadin.util.SerializerHelper;
/**
* Property descriptor that is able to create simple {@link MethodProperty}
* instances for a bean, using given accessors.
*
* @param <BT>
* bean type
*
* @since 6.6
*/
public class MethodPropertyDescriptor<BT> implements
VaadinPropertyDescriptor<BT> {
private static final Logger logger = Logger
.getLogger(MethodPropertyDescriptor.class.getName());
private final String name;
private Class<?> propertyType;
private transient Method readMethod;
private transient Method writeMethod;
/**
* Creates a property descriptor that can create MethodProperty instances to
* access the underlying bean property.
*
* @param name
* of the property
* @param propertyType
* type (class) of the property
* @param readMethod
* getter {@link Method} for the property
* @param writeMethod
* setter {@link Method} for the property or null if read-only
* property
*/
public MethodPropertyDescriptor(String name, Class<?> propertyType,
Method readMethod, Method writeMethod) {
this.name = name;
this.propertyType = propertyType;
this.readMethod = readMethod;
this.writeMethod = writeMethod;
}
/* Special serialization to handle method references */
private void writeObject(java.io.ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
SerializerHelper.writeClass(out, propertyType);
if (writeMethod != null) {
out.writeObject(writeMethod.getName());
SerializerHelper.writeClass(out, writeMethod.getDeclaringClass());
SerializerHelper.writeClassArray(out,
writeMethod.getParameterTypes());
} else {
out.writeObject(null);
out.writeObject(null);
out.writeObject(null);
}
if (readMethod != null) {
out.writeObject(readMethod.getName());
SerializerHelper.writeClass(out, readMethod.getDeclaringClass());
SerializerHelper.writeClassArray(out,
readMethod.getParameterTypes());
} else {
out.writeObject(null);
out.writeObject(null);
out.writeObject(null);
}
}
/* Special serialization to handle method references */
private void readObject(java.io.ObjectInputStream in) throws IOException,
ClassNotFoundException {
in.defaultReadObject();
try {
@SuppressWarnings("unchecked")
// business assumption; type parameters not checked at runtime
Class<BT> class1 = (Class<BT>) SerializerHelper.readClass(in);
propertyType = class1;
String name = (String) in.readObject();
Class<?> writeMethodClass = SerializerHelper.readClass(in);
Class<?>[] paramTypes = SerializerHelper.readClassArray(in);
if (name != null) {
writeMethod = writeMethodClass.getMethod(name, paramTypes);
} else {
writeMethod = null;
}
name = (String) in.readObject();
Class<?> readMethodClass = SerializerHelper.readClass(in);
paramTypes = SerializerHelper.readClassArray(in);
if (name != null) {
readMethod = readMethodClass.getMethod(name, paramTypes);
} else {
readMethod = null;
}
} catch (SecurityException e) {
logger.log(Level.SEVERE, "Internal deserialization error", e);
} catch (NoSuchMethodException e) {
logger.log(Level.SEVERE, "Internal deserialization error", e);
}
};
public String getName() {
return name;
}
public Class<?> getPropertyType() {
return propertyType;
}
public Property createProperty(Object bean) {
return new MethodProperty<Object>(propertyType, bean, readMethod,
writeMethod);
}
}
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