package org.infinispan.objectfilter.impl.hql;
import org.hibernate.hql.ast.spi.AstProcessingChain;
import org.hibernate.hql.ast.spi.AstProcessor;
import org.hibernate.hql.ast.spi.QueryRendererProcessor;
import org.hibernate.hql.ast.spi.QueryResolverProcessor;
import org.hibernate.hql.ast.spi.SingleEntityQueryBuilder;
import org.infinispan.objectfilter.impl.hql.predicate.FilterPredicateFactory;
import org.infinispan.objectfilter.impl.syntax.BooleanExpr;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Map;
/**
* @author anistor@redhat.com
* @since 7.0
*/
public final class FilterProcessingChain<TypeMetadata> implements AstProcessingChain<FilterParsingResult> {
private final QueryResolverProcessor resolverProcessor;
private final QueryRendererProcessor rendererProcessor;
private final FilterRendererDelegate rendererDelegate;
private FilterProcessingChain(QueryResolverProcessor resolverProcessor, QueryRendererProcessor rendererProcessor, FilterRendererDelegate rendererDelegate) {
this.resolverProcessor = resolverProcessor;
this.rendererProcessor = rendererProcessor;
this.rendererDelegate = rendererDelegate;
}
@Override
public Iterator<AstProcessor> iterator() {
return Arrays.asList(resolverProcessor, rendererProcessor).iterator();
}
@Override
public FilterParsingResult getResult() {
return rendererDelegate.getResult();
}
public static <TypeMetadata> FilterProcessingChain<TypeMetadata> build(ObjectPropertyHelper<TypeMetadata> propertyHelper, Map<String, Object> namedParameters) {
QueryResolverProcessor resolverProcessor = new QueryResolverProcessor(new FilterQueryResolverDelegate(propertyHelper));
SingleEntityQueryBuilder<BooleanExpr> queryBuilder = SingleEntityQueryBuilder.getInstance(new FilterPredicateFactory(propertyHelper.getEntityNamesResolver()), propertyHelper);
FilterRendererDelegate rendererDelegate = new FilterRendererDelegate(propertyHelper, queryBuilder, namedParameters);
QueryRendererProcessor rendererProcessor = new QueryRendererProcessor(rendererDelegate);
return new FilterProcessingChain<TypeMetadata>(resolverProcessor, rendererProcessor, rendererDelegate);
}
}