And.java

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package org.apache.doris.nereids.trees.expressions;

import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.util.ExpressionUtils;

import com.google.common.base.Preconditions;

import java.util.List;

/**
 * And predicate expression.
 */
public class And extends CompoundPredicate {
    /**
     * Desc: Constructor for CompoundPredicate.
     *
     * @param left  left child of comparison predicate
     * @param right right child of comparison predicate
     */
    public And(Expression left, Expression right) {
        super(ExpressionUtils.mergeList(
                ExpressionUtils.extractConjunction(left),
                ExpressionUtils.extractConjunction(right)), "AND");
    }

    public And(List<Expression> children) {
        super(children, "AND");
    }

    @Override
    public Expression withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() >= 2);
        return new And(children);
    }

    @Override
    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
        return visitor.visitAnd(this, context);
    }

    @Override
    public CompoundPredicate flip() {
        return new Or(children);
    }

    @Override
    public CompoundPredicate flip(List<Expression> children) {
        return new Or(children);
    }

    @Override
    public Class<? extends CompoundPredicate> flipType() {
        return Or.class;
    }

    @Override
    protected List<Expression> extract() {
        return ExpressionUtils.extractConjunction(this);
    }

    @Override
    public List<Expression> children() {
        if (flattenChildren.isEmpty()) {
            for (Expression child : children) {
                if (child instanceof And) {
                    flattenChildren.addAll(((And) child).extract());
                } else {
                    flattenChildren.add(child);
                }
            }
        }
        return flattenChildren;
    }
}