/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* 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.intellij.util.xmlb;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.JDOMUtil;
import com.intellij.util.ReflectionUtil;
import gnu.trove.THashMap;
import org.jdom.Element;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Map;
public class SkipDefaultValuesSerializationFilters extends SerializationFilterBase {
private final Map<Class<?>, Object> myDefaultBeans = new THashMap<Class<?>, Object>();
@Override
protected boolean accepts(@NotNull Accessor accessor, @NotNull Object bean, @Nullable Object beanValue) {
Object defValue = accessor.read(getDefaultBean(bean));
if (defValue instanceof Element && beanValue instanceof Element) {
return !JDOMUtil.areElementsEqual((Element)beanValue, (Element)defValue);
}
else {
return !Comparing.equal(beanValue, defValue);
}
}
@NotNull
Object getDefaultBean(@NotNull Object bean) {
Class<?> c = bean.getClass();
Object o = myDefaultBeans.get(c);
if (o == null) {
o = ReflectionUtil.newInstance(c);
configure(o);
myDefaultBeans.put(c, o);
}
return o;
}
/**
* Override to put your own default object configuration
*/
protected void configure(@NotNull Object o) {
}
}