dubbo Converter 源码
dubbo Converter 代码
文件路径：/dubbo-common/src/main/java/org/apache/dubbo/common/convert/Converter.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.
*/
package org.apache.dubbo.common.convert;
import org.apache.dubbo.common.extension.ExtensionScope;
import org.apache.dubbo.common.extension.SPI;
import org.apache.dubbo.common.lang.Prioritized;
import static org.apache.dubbo.common.utils.ClassUtils.isAssignableFrom;
import static org.apache.dubbo.common.utils.TypeUtils.findActualTypeArgument;
/**
* A class to convert the source-typed value to the target-typed value
*
* @param <S> The source type
* @param <T> The target type
* @since 2.7.6
*/
@SPI(scope = ExtensionScope.FRAMEWORK)
@FunctionalInterface
public interface Converter<S, T> extends Prioritized {
/**
* Accept the source type and target type or not
*
* @param sourceType the source type
* @param targetType the target type
* @return if accepted, return <code>true</code>, or <code>false</code>
*/
default boolean accept(Class<?> sourceType, Class<?> targetType) {
return isAssignableFrom(sourceType, getSourceType()) && isAssignableFrom(targetType, getTargetType());
}
/**
* Convert the source-typed value to the target-typed value
*
* @param source the source-typed value
* @return the target-typed value
*/
T convert(S source);
/**
* Get the source type
*
* @return non-null
*/
default Class<S> getSourceType() {
return findActualTypeArgument(getClass(), Converter.class, 0);
}
/**
* Get the target type
*
* @return non-null
*/
default Class<T> getTargetType() {
return findActualTypeArgument(getClass(), Converter.class, 1);
}
}
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