001/*
002 *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.mybatisflex.core.query;
017
018import com.mybatisflex.core.constant.SqlOperator;
019import com.mybatisflex.core.util.LambdaGetter;
020import com.mybatisflex.core.util.LambdaUtil;
021
022import java.util.HashMap;
023
024/**
025 * @author michael
026 */
027public class SqlOperators extends HashMap<String, SqlOperator> {
028
029    private static final SqlOperators EMPTY = new SqlOperators() {
030        @Override
031        public SqlOperator put(String key, SqlOperator value) {
032            throw new IllegalArgumentException("Can not set SqlOperator for \"empty\" SqlOperators");
033        }
034    };
035
036    public static SqlOperators empty() {
037        return EMPTY;
038    }
039
040    public static SqlOperators of() {
041        return new SqlOperators();
042    }
043
044    public static <T> SqlOperators of(LambdaGetter<T> getter, SqlOperator operator) {
045        SqlOperators map = new SqlOperators(1);
046        map.put(LambdaUtil.getFieldName(getter), operator);
047        return map;
048    }
049
050    public static <T> SqlOperators of(String fieldName, SqlOperator operator) {
051        SqlOperators map = new SqlOperators(1);
052        map.put(fieldName, operator);
053        return map;
054    }
055
056    public SqlOperators() {
057    }
058
059    public SqlOperators(int initialCapacity) {
060        super(initialCapacity);
061    }
062
063    public SqlOperators(SqlOperators sqlOperators) {
064        this.putAll(sqlOperators);
065    }
066
067
068    public <T> SqlOperators set(LambdaGetter<T> getter, SqlOperator operator) {
069        this.put(LambdaUtil.getFieldName(getter), operator);
070        return this;
071    }
072
073    public SqlOperators set(String fieldName, SqlOperator operator) {
074        this.put(fieldName, operator);
075        return this;
076    }
077
078    public SqlOperators set(QueryColumn column, SqlOperator operator) {
079        this.put(column.getName(), operator);
080        return this;
081    }
082
083}