package org.infinispan.query.impl.externalizers;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Set;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.SortField.Type;
import org.infinispan.commons.marshall.AbstractExternalizer;
import org.infinispan.commons.util.Util;
/**
* WARNING: this Externalizer implementation drops some state associated to the SortField instance.
*
* A CUSTOM Sort Type is unsupported, and it is also not possible to use a custom Field Parser
* or options related to missing value sorting.
*/
public class LuceneSortFieldExternalizer extends AbstractExternalizer<SortField> {
@Override
public Set<Class<? extends SortField>> getTypeClasses() {
return Util.<Class<? extends SortField>>asSet(SortField.class);
}
@Override
public SortField readObject(final ObjectInput input) throws IOException, ClassNotFoundException {
return readObjectStatic(input);
}
@Override
public void writeObject(final ObjectOutput output, final SortField sortField) throws IOException {
writeObjectStatic(output, sortField);
}
@Override
public Integer getId() {
return ExternalizerIds.LUCENE_SORT_FIELD;
}
static void writeObjectStatic(final ObjectOutput output, final SortField sortField) throws IOException {
output.writeUTF(sortField.getField());
output.writeObject(sortField.getType());
output.writeBoolean(sortField.getReverse());
}
public static SortField readObjectStatic(final ObjectInput input) throws IOException, ClassNotFoundException {
final String fieldName = input.readUTF();
final Type sortType = (Type) input.readObject();
final boolean reverseSort = input.readBoolean();
return new SortField(fieldName, sortType, reverseSort);
}
}