silentbalanceyh/vertx-zero

package io.horizon.uca.qr.syntax;

import io.horizon.util.HUt;

import java.util.HashSet;
import java.util.Set;

/*
 * Branch node usage, current operator must be
 * AND or OR
 */
public class QTier implements QBranch {

    private final QOp op;
    private final Set<QNode> nodes = new HashSet<>();

    private Integer level = 0;

    private QTier(final QOp op) {
        this.op = null == op ? QOp.AND : op;
    }

    static QTier create(final QOp op) {
        return new QTier(op);
    }

    @Override
    public boolean isLeaf() {
        return false;
    }


    @Override
    public QOp op() {
        return this.op;
    }

    @Override
    public QNode level(final Integer level) {
        this.level = level;
        return this;
    }

    @Override
    public Set<QNode> nodes() {
        return this.nodes;
    }

    @Override
    public QTier add(final QNode node) {
        this.nodes.add(node);
        return this;
    }

    @Override
    public String toString() {
        final StringBuilder source = new StringBuilder();
        HUt.itRepeat(this.level, () -> source.append("\t"));
        source.append("Branch").append(",");
        source.append("OP：").append(this.op).append(",");
        source.append("Node：").append("\n");
        this.nodes.forEach(node -> {
            HUt.itRepeat(this.level, () -> source.append("\t"));
            source.append(node).append("\n");
        });
        return source.toString();
    }
}