seata-go/pkg/saga/statemachine/engine/expr/expression_factory_manager.go

/*
 * 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.
 */

package expr

import (
	"maps"
	"strings"
)

const DefaultExpressionType = "Default"

type ExpressionFactoryManager struct {
	expressionFactoryMap map[string]ExpressionFactory
}

func NewExpressionFactoryManager() *ExpressionFactoryManager {
	return &ExpressionFactoryManager{
		expressionFactoryMap: make(map[string]ExpressionFactory),
	}
}

func (e *ExpressionFactoryManager) GetExpressionFactory(expressionType string) ExpressionFactory {
	if strings.TrimSpace(expressionType) == "" {
		expressionType = DefaultExpressionType
	}
	return e.expressionFactoryMap[expressionType]
}

func (e *ExpressionFactoryManager) SetExpressionFactoryMap(expressionFactoryMap map[string]ExpressionFactory) {
	maps.Copy(e.expressionFactoryMap, expressionFactoryMap)
}

func (e *ExpressionFactoryManager) PutExpressionFactory(expressionType string, factory ExpressionFactory) {
	e.expressionFactoryMap[expressionType] = factory
}