org.nustaq.serialization.serializers.FSTCPEnumSetSerializer Maven / Gradle / Ivy
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A fast java serialization drop in-replacement and some serialization based utils such as Structs and OffHeap Memory.
/*
* Copyright 2014 Ruediger Moeller.
*
* 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 org.nustaq.serialization.serializers;
import org.nustaq.serialization.FSTBasicObjectSerializer;
import org.nustaq.serialization.FSTClazzInfo;
import org.nustaq.serialization.FSTObjectInput;
import org.nustaq.serialization.FSTObjectOutput;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.EnumSet;
/**
* Created with IntelliJ IDEA.
* User: ruedi
* Date: 11.11.12
* Time: 04:09
*
* EnumSet Serializer for Cross Platform serialization. Writes full Strings instead of ordinals
*
*/
public class FSTCPEnumSetSerializer extends FSTBasicObjectSerializer {
Field elemType;
@Override
public void writeObject(FSTObjectOutput out, Object toWrite, FSTClazzInfo clzInfo, FSTClazzInfo.FSTFieldInfo referencedBy, int streamPosition) throws IOException {
EnumSet enset = (EnumSet) toWrite;
int count = 0;
out.writeInt(enset.size());
if ( enset.isEmpty() ) { //WTF only way to determine enumtype ..
EnumSet compl = EnumSet.complementOf(enset);
out.writeClassTag(compl.iterator().next().getClass());
} else {
for (Object element : enset) {
if ( count == 0 ) {
out.writeStringUTF(element.getClass().getName());
}
out.writeStringUTF(element.toString());
count++;
}
}
}
/**
* @return true if FST can skip a search for same instances in the serialized ObjectGraph. This speeds up reading and writing and makes
* sense for short immutable such as Integer, Short, Character, Date, .. . For those classes it is more expensive (CPU, size) to do a lookup than to just
* write the Object twice in case.
*/
@Override
public boolean alwaysCopy() {
return false;
}
@Override
public Object instantiate(Class objectClass, FSTObjectInput in, FSTClazzInfo serializationInfo, FSTClazzInfo.FSTFieldInfo referencee, int streamPosition) throws Exception {
int len = in.readInt();
Class elemCl = in.getClassForName( in.readStringUTF() );
EnumSet enSet = EnumSet.noneOf(elemCl);
in.registerObject(enSet,streamPosition,serializationInfo, referencee); // IMPORTANT, else tracking double objects will fail
for (int i = 0; i < len; i++) {
String val = in.readStringUTF();
enSet.add(Enum.valueOf(elemCl,val));
}
return enSet;
}
}
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