/*
 * Copyright 2019-2023 The Polypheny Project
 *
 * 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.polypheny.db.cypher.clause;

import javax.annotation.Nullable;
import org.polypheny.db.algebra.AlgNode;
import org.polypheny.db.algebra.type.AlgDataTypeField;
import org.polypheny.db.cypher.cypher2alg.CypherToAlgConverter.CypherContext;
import org.polypheny.db.cypher.cypher2alg.CypherToAlgConverter.RexType;
import org.polypheny.db.languages.ParserPos;
import org.polypheny.db.rex.RexNode;
import org.polypheny.db.util.Pair;


public class CypherStarReturn extends CypherReturn {

    protected CypherStarReturn( ParserPos pos ) {
        super( pos );
    }


    @Override
    public boolean isStar() {
        return true;
    }


    @Override
    @Nullable
    public Pair<String, RexNode> getRex( CypherContext context, RexType type ) {
        AlgNode node = context.peek();

        for ( AlgDataTypeField field : node.getRowType().getFieldList() ) {
            context.add( Pair.of( field.getName(), context.rexBuilder.makeInputRef( field.getType(), field.getIndex() ) ) );
        }

        return null;
    }

}
