mybatis-flex/mybatis-flex-spring-boot-starter/src/main/java/com/mybatisflex/spring/boot/ConditionalOnMybatisFlexDatasource.java

/**
 * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
 * <p>
 * Licensed 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.mybatisflex.spring.boot;

import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.context.annotation.Conditional;
import org.springframework.core.env.*;
import org.springframework.core.type.AnnotatedTypeMetadata;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.Iterator;


@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Conditional(ConditionalOnMybatisFlexDatasource.OnMybatisFlexDataSourceCondition.class)
public @interface ConditionalOnMybatisFlexDatasource {

    class OnMybatisFlexDataSourceCondition implements Condition {

        @Override
        public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
            Environment env = context.getEnvironment();
            if (env instanceof AbstractEnvironment) {
                MutablePropertySources propertySources = ((AbstractEnvironment) env).getPropertySources();
                Iterator<PropertySource<?>> it = propertySources.stream().iterator();
                while (it.hasNext()) {
                    PropertySource ps = it.next();
                    if (ps instanceof MapPropertySource) {
                        for (String propertyName : ((MapPropertySource) ps).getSource().keySet()) {
                            if (propertyName.startsWith("mybatis-flex.datasource.")) {
                                return true;
                            }
                        }
                    }
                }
            }
            return false;
        }
    }

}