package org.infinispan.query.impl;
import java.util.LinkedList;
import java.util.List;
import org.infinispan.AdvancedCache;
import org.infinispan.query.ProjectionConstants;
import org.infinispan.query.backend.KeyTransformationHandler;
/**
* Converts between Infinispan and HSearch projection fields.
*
* @author <a href="mailto:mluksa@redhat.com">Marko Luksa</a>
*/
public class ProjectionConverter {
private final AdvancedCache<?, ?> cache;
private final KeyTransformationHandler keyTransformationHandler;
private final String[] hibernateSearchFields;
private final List<Integer> indexesOfKey = new LinkedList<Integer>();
public ProjectionConverter(String[] fields, AdvancedCache<?, ?> cache, KeyTransformationHandler keyTransformationHandler) {
this.cache = cache;
this.keyTransformationHandler = keyTransformationHandler;
hibernateSearchFields = fields.clone();
for (int i = 0; i < hibernateSearchFields.length; i++) {
String field = hibernateSearchFields[i];
if (field.equals(ProjectionConstants.KEY)) {
hibernateSearchFields[i] = ProjectionConstants.ID;
indexesOfKey.add(i);
}
}
}
public String[] getHSearchProjection() {
return hibernateSearchFields;
}
public Object[] convert(Object[] projection) {
for (Integer index : indexesOfKey) {
projection[index] = keyTransformationHandler.stringToKey((String) projection[index], cache.getClassLoader());
}
return projection;
}
}