com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection.SpringWebJavaMethodParameterMetadata.java Source code

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Here is the source code for com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection.SpringWebJavaMethodParameterMetadata.java

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/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2016 Tiago de Freitas Lima
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/
package com.github.ljtfreitas.restify.http.spring.contract.metadata.reflection;

import java.util.Optional;

import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestParam;

import com.github.ljtfreitas.restify.http.contract.metadata.EndpointMethodParameterSerializer;
import com.github.ljtfreitas.restify.http.contract.metadata.reflection.JavaType;
import com.github.ljtfreitas.restify.http.contract.metadata.reflection.JavaTypeResolver;
import com.github.ljtfreitas.restify.http.spring.contract.metadata.SpringWebEndpointMethodParameterSerializer;

public class SpringWebJavaMethodParameterMetadata {

    private final JavaType type;
    private final String name;
    private final PathVariable pathParameter;
    private final RequestHeader headerParameter;
    private final RequestBody bodyParameter;
    private final RequestParam queryParameter;
    private final Class<? extends EndpointMethodParameterSerializer> serializerType;

    public SpringWebJavaMethodParameterMetadata(java.lang.reflect.Parameter javaMethodParameter) {
        this(javaMethodParameter, javaMethodParameter.getDeclaringExecutable().getDeclaringClass());
    }

    public SpringWebJavaMethodParameterMetadata(java.lang.reflect.Parameter javaMethodParameter,
            Class<?> targetClassType) {
        this.type = JavaType.of(new JavaTypeResolver(targetClassType).parameterizedTypeOf(javaMethodParameter));

        this.pathParameter = AnnotationUtils
                .synthesizeAnnotation(javaMethodParameter.getAnnotation(PathVariable.class), javaMethodParameter);

        this.headerParameter = AnnotationUtils
                .synthesizeAnnotation(javaMethodParameter.getAnnotation(RequestHeader.class), javaMethodParameter);

        this.bodyParameter = AnnotationUtils
                .synthesizeAnnotation(javaMethodParameter.getAnnotation(RequestBody.class), javaMethodParameter);

        this.queryParameter = AnnotationUtils
                .synthesizeAnnotation(javaMethodParameter.getAnnotation(RequestParam.class), javaMethodParameter);

        this.name = Optional.ofNullable(pathParameter).map(PathVariable::value).filter(s -> !s.trim().isEmpty())
                .orElseGet(() -> Optional.ofNullable(headerParameter).map(RequestHeader::value)
                        .filter(s -> !s.trim().isEmpty())
                        .orElseGet(() -> Optional.ofNullable(queryParameter).map(RequestParam::value)
                                .filter(s -> !s.trim().isEmpty())
                                .orElseGet(() -> Optional.ofNullable(javaMethodParameter.getName()).orElseThrow(
                                        () -> new IllegalStateException("Could not get the name of the parameter "
                                                + javaMethodParameter)))));

        this.serializerType = SpringWebEndpointMethodParameterSerializer.of(this);
    }

    public String name() {
        return name;
    }

    public JavaType javaType() {
        return type;
    }

    public boolean path() {
        return pathParameter != null;
    }

    public boolean body() {
        return bodyParameter != null;
    }

    public boolean header() {
        return headerParameter != null;
    }

    public boolean query() {
        return queryParameter != null;
    }

    public Class<? extends EndpointMethodParameterSerializer> serializer() {
        return serializerType;
    }
}