com.github.datalking.common.convert.descriptor.ParameterDescriptor Maven / Gradle / Ivy

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package com.github.datalking.common.convert.descriptor;

import com.github.datalking.common.GenericCollectionTypeResolver;
import com.github.datalking.common.MethodParameter;

import java.lang.annotation.Annotation;

/**
 * @author yaoo on 5/10/18
 */
public class ParameterDescriptor extends AbstractDescriptor {

    private final MethodParameter methodParameter;

    public ParameterDescriptor(MethodParameter methodParameter) {
        super(methodParameter.getParameterType());
        this.methodParameter = methodParameter;
    }

    private ParameterDescriptor(Class type, MethodParameter methodParameter) {
        super(type);
        this.methodParameter = methodParameter;
    }

    @Override
    public Annotation[] getAnnotations() {
        if (this.methodParameter.getParameterIndex() == -1) {
            return TypeDescriptor.nullSafeAnnotations(this.methodParameter.getMethodAnnotations());
        }
        else {
            return TypeDescriptor.nullSafeAnnotations(this.methodParameter.getParameterAnnotations());
        }
    }

    @Override
    protected Class resolveCollectionElementType() {
        return GenericCollectionTypeResolver.getCollectionParameterType(this.methodParameter);
    }

    @Override
    protected Class resolveMapKeyType() {
        return GenericCollectionTypeResolver.getMapKeyParameterType(this.methodParameter);
    }

    @Override
    protected Class resolveMapValueType() {
        return GenericCollectionTypeResolver.getMapValueParameterType(this.methodParameter);
    }

    @Override
    protected AbstractDescriptor nested(Class type, int typeIndex) {
        MethodParameter methodParameter = new MethodParameter(this.methodParameter);
        methodParameter.increaseNestingLevel();
        methodParameter.setTypeIndexForCurrentLevel(typeIndex);
        return new ParameterDescriptor(type, methodParameter);
    }

}