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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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 com.vaadin.data.util;
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.Field;
import org.junit.Assert;
import org.junit.Test;
/**
* Test for MethodProperty: don't allocate unnecessary Object arrays.
*
* @since 7.2
* @author Vaadin Ltd
*/
public class MethodPropertyMemoryConsumption {
@Test
public void testSetArguments() throws NoSuchFieldException,
SecurityException, IllegalArgumentException, IllegalAccessException {
TestBean bean = new TestBean();
TestMethodProperty<String> property = new TestMethodProperty<String>(
bean, "name");
Object[] getArgs = property.getGetArgs();
Object[] setArgs = property.getSetArgs();
Field getArgsField = TestMethodProperty.class
.getDeclaredField("getArgs");
getArgsField.setAccessible(true);
Field setArgsField = TestMethodProperty.class
.getDeclaredField("setArgs");
setArgsField.setAccessible(true);
Assert.assertSame("setArguments method sets non-default instance"
+ " of empty Object array for getArgs",
getArgsField.get(property), getArgs);
Assert.assertSame("setArguments method sets non-default instance"
+ " of empty Object array for setArgs",
setArgsField.get(property), setArgs);
}
@Test
public void testDefaultCtor() {
TestBean bean = new TestBean();
TestMethodProperty<String> property = new TestMethodProperty<String>(
bean, "name");
Object[] getArgs = property.getGetArgs();
Object[] setArgs = property.getSetArgs();
TestBean otherBean = new TestBean();
TestMethodProperty<String> otherProperty = new TestMethodProperty<String>(
otherBean, "name");
Assert.assertSame("setArguments method uses different instance"
+ " of empty Object array for getArgs", getArgs,
otherProperty.getGetArgs());
Assert.assertSame("setArguments method uses different instance"
+ " of empty Object array for setArgs", setArgs,
otherProperty.getSetArgs());
}
@Test
public void testDefaultArgsSerialization() throws IOException,
ClassNotFoundException {
TestBean bean = new TestBean();
TestMethodProperty<String> property = new TestMethodProperty<String>(
bean, "name");
ByteArrayOutputStream sourceOutStream = new ByteArrayOutputStream();
ObjectOutputStream outStream = new ObjectOutputStream(sourceOutStream);
outStream.writeObject(property);
ObjectInputStream inputStream = new ObjectInputStream(
new ByteArrayInputStream(sourceOutStream.toByteArray()));
Object red = inputStream.readObject();
TestMethodProperty<?> deserialized = (TestMethodProperty<?>) red;
Assert.assertNotNull("Deseriliation doesn't call setArguments method",
deserialized.getGetArgs());
Assert.assertNotNull("Deseriliation doesn't call setArguments method",
deserialized.getSetArgs());
}
public static class TestMethodProperty<T> extends MethodProperty<T> {
public TestMethodProperty(Object instance, String beanPropertyName) {
super(instance, beanPropertyName);
}
@Override
public void setArguments(Object[] getArgs, Object[] setArgs,
int setArgumentIndex) {
super.setArguments(getArgs, setArgs, setArgumentIndex);
this.getArgs = getArgs;
this.setArgs = setArgs;
}
Object[] getGetArgs() {
return getArgs;
}
Object[] getSetArgs() {
return setArgs;
}
private transient Object[] getArgs;
private transient Object[] setArgs;
}
public static class TestBean implements Serializable {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
}
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