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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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package org.apache.cayenne.query;

import org.apache.cayenne.ejbql.EJBQLCompiledExpression;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.map.ObjEntity;

/**
 * A metadata object for the {@link EJBQLQuery}.
 * 
 * @since 3.0
 */
class EJBQLQueryMetadata extends BaseQueryMetadata {

    private transient SQLResultSetMapping resultSetMapping;

    void setResultSetMapping(SQLResultSetMapping resultSetMapping) {
        this.resultSetMapping = resultSetMapping;
    }

    @Override
    public SQLResultSetMapping getResultSetMapping() {
        return resultSetMapping;
    }

    boolean resolve(EntityResolver resolver, EJBQLQuery query) {
        EJBQLCompiledExpression expression = query.getExpression(resolver);
        setResultSetMapping(expression.getResultSetMapping());
        
        ObjEntity root = expression.getRootDescriptor().getEntity();

        // TODO: andrus, 4/3/2007 - generate cache key based on EJBQL statement
        return super.resolve(root, resolver, null);
    }
}
