com.gitee.feizns.convert.method.valueof.TwoParametersValueOfConverter Maven / Gradle / Ivy

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Java 类型，反射，属性以及实体类操作工具类。

There is a newer version: 5.5-RELEASE

package com.gitee.feizns.convert.method.valueof;

import com.gitee.feizns.convert.method.AbstractMethodConverter;
import com.gitee.feizns.convert.method.MethodSelectionStrategyList;
import com.gitee.feizns.convert.method.MethodWrapper;
import com.gitee.feizns.reflect.MethodUtils;

import java.lang.reflect.Method;
import java.util.stream.Stream;

/**
 * valueOf(Class targetType, Object args) : 双参数 valueOf 转换策略
 * @author feizns
 * @since 2019/5/27
 */
public class TwoParametersValueOfConverter extends AbstractValueOfMethodConverter {

    @Override
    protected Stream filterMethod(Stream methodStream) {
        return methodStream.filter(method -> method.getParameterCount() == 2 && method.getParameterTypes()[0] == Class.class);
    }

    @Override
    protected MethodSelectionStrategyList getSelectionStrategy(Class targetType) {
        return new MethodSelectionStrategyList(
            new MethodSelectionStrategyByParameterImpl(),
            new MethodSelectionStrategyByConverterImpl(this)
        );
    }

    //根据方法的参数最优匹配选择最优的方法
    private class MethodSelectionStrategyByParameterImpl extends AbstractMethodSelectionStrategyByParameter {

        @Override
        protected boolean isYou(Method method, Class inheritanceClz) {
            return method.getParameterTypes()[1] == inheritanceClz;
        }

        @Override
        protected MethodWrapper getInvokeStrategy(Method method, Class targetType, Object original) {
            return () -> method == null ? null : MethodUtils.invoke(method, targetType, original);
        }

    }

    //根据支持的转换器列表寻找最优的方法
    private class MethodSelectionStrategyByConverterImpl extends AbstractMethodSelectionStrategyByConverter {

        public MethodSelectionStrategyByConverterImpl(AbstractMethodConverter abstractMethodConverter) {
            super(abstractMethodConverter);
        }

        @Override
        protected Class getType(Method method) {
            return method.getParameterTypes()[1];
        }

        @Override
        protected Object invoke(Method method, Class targetType, Object original) {
            return MethodUtils.invoke(method, targetType, original);
        }

    }

}