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package com.vaadin.tests;
import javax.swing.text.DateFormatter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.lang.reflect.Executable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Locale;
import org.apache.commons.lang.SerializationUtils;
import org.junit.Test;
import com.vaadin.server.SerializableSupplier;
import com.vaadin.ui.Grid;
import com.vaadin.ui.renderers.LocalDateRenderer;
import com.vaadin.ui.renderers.LocalDateTimeRenderer;
import static java.lang.reflect.Modifier.isPublic;
import static java.lang.reflect.Modifier.isStatic;
import static junit.framework.TestCase.assertNotNull;
public class TestTemporalSerialization {
@Test
public void smokeTestRendererSerialization()
throws IOException, ClassNotFoundException {
Grid<Object> grid = new Grid<>();
grid.addColumn(
o -> new Date(o.hashCode()).toInstant()
.atZone(ZoneId.systemDefault()).toLocalDate(),
new LocalDateRenderer());
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(
outputStream);
objectOutputStream.writeObject(grid);
ByteArrayInputStream inputStream = new ByteArrayInputStream(
outputStream.toByteArray());
Grid readGrid = (Grid) new ObjectInputStream(inputStream).readObject();
assertNotNull(readGrid.getColumns().get(0));
}
@Test
public void testLocalDateRenderer() throws IllegalAccessException,
InstantiationException, InvocationTargetException {
testSerialization(LocalDateRenderer.class);
}
@Test
public void testLocalDateTimeRenderer() throws IllegalAccessException,
InstantiationException, InvocationTargetException {
testSerialization(LocalDateTimeRenderer.class);
}
@Test(expected = AssertionError.class)
public void testAssertionFail() {
new LocalDateRenderer(new NonSerializableThing());
}
private static class NonSerializableThing
implements SerializableSupplier<DateTimeFormatter> {
public NonSerializableThing() {
}
private DateTimeFormatter useless = DateTimeFormatter.ofPattern("Y");
@Override
public DateTimeFormatter get() {
return useless;
}
}
private void testSerialization(Class<?> rendererClass)
throws IllegalAccessException, InvocationTargetException,
InstantiationException {
for (Constructor<?> constructor : rendererClass.getConstructors()) {
if (!isPublic(constructor.getModifiers()))
continue;
Object[] params = simulateParams(constructor);
if (params != null) {
Object o = constructor.newInstance(params);
checkSerialization(constructor, o);
}
}
for (Method method : rendererClass.getMethods()) {
if (!isPublic(method.getModifiers())
|| !isStatic(method.getModifiers())) {
continue;
}
if (!method.getReturnType().isAssignableFrom(rendererClass)) {
continue;
}
Object[] params = simulateParams(method);
if (params != null) {
Object o = method.invoke(simulateParams(method));
checkSerialization(method, o);
}
}
}
private Object[] simulateParams(Executable executable) {
Parameter[] parameters = executable.getParameters();
Object[] args = new Object[parameters.length];
for (int i = 0; i < parameters.length; i++) {
Parameter parameter = parameters[i];
Class<?> type = parameter.getType();
if (type.isAssignableFrom(String.class)) {
args[i] = "";
} else if (type.isAssignableFrom(Locale.class)) {
args[i] = Locale.US;
} else if (type.isAssignableFrom(SerializableSupplier.class)) {
Type genericType = ((ParameterizedType) parameter
.getParameterizedType()).getActualTypeArguments()[0];
args[i] = (SerializableSupplier) () -> {
try {
return ((Class) genericType).newInstance();
} catch (Exception e) {
throw new AssertionError(e);
}
};
} else if (type.isAssignableFrom(DateFormatter.class)
|| type.isAssignableFrom(DateTimeFormatter.class)) {
assertNotNull(
"Non-deprecated code has non-serializable parameter: "
+ executable.toGenericString(),
executable.getAnnotation(Deprecated.class));
return null;
} else {
throw new IllegalArgumentException(
"Unsupported parameter type: " + type.getName());
}
}
return args;
}
private void checkSerialization(Executable method, Object o) {
try {
byte[] serialize = SerializationUtils.serialize((Serializable) o);
SerializationUtils.deserialize(serialize);
} catch (Throwable e) {
throw new AssertionError(method.toGenericString(), e);
}
}
}
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