Scope.java

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// 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
// 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.
// This file is copied from
// https://github.com/apache/hive/blob/master/hplsql/src/main/java/org/apache/hive/hplsql/Scope.java
// and modified by Doris

package org.apache.doris.plsql;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

/**
 * PL/SQL block scope
 */
public class Scope {

    public enum Type {
        GLOBAL, BEGIN_END, LOOP, HANDLER, PACKAGE, ROUTINE
    }

    Map<String, Var> vars = new HashMap<>();
    ArrayList<Handler> handlers = new ArrayList<Handler>();
    Scope parent;
    Type type;
    Package pack;

    Scope(Type type) {
        this.parent = null;
        this.type = type;
        this.pack = null;
    }

    Scope(Scope parent, Type type) {
        this.parent = parent;
        this.type = type;
        this.pack = null;
    }

    Scope(Scope parent, Type type, Package pack) {
        this.parent = parent;
        this.type = type;
        this.pack = pack;
    }

    /**
     * Add a local variable
     */
    void addVariable(Var var) {
        vars.put(var.name.toUpperCase(), var);
    }

    /**
     * Add a condition handler
     */
    void addHandler(Handler handler) {
        handlers.add(handler);
    }

    /**
     * Get the parent scope
     */
    Scope getParent() {
        return parent;
    }
}