MethodDictionary.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/objects/MethodDictionary.java
// and modified by Doris

package org.apache.doris.plsql.objects;

import org.apache.doris.plsql.exception.NoSuchPlMethodException;

import org.antlr.v4.runtime.ParserRuleContext;

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

public class MethodDictionary<T extends PlObject> {
    public static final String __GETITEM__ = "__GETITEM__";
    public static final String __SETITEM__ = "__SETITEM__";
    private final Map<String, Method<T>> dict = new HashMap<>();

    public void put(String methodName, Method<T> method) {
        dict.put(methodName.toUpperCase(), method);
    }

    public Method<T> get(ParserRuleContext ctx, String methodName) {
        Method<T> result = dict.get(methodName.toUpperCase());
        if (result == null) {
            throw new NoSuchPlMethodException(ctx, "No such method " + methodName);
        }
        return result;
    }
}