springfox.documentation.swagger.readers.parameter.ParameterAllowableReader.java Source code

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Here is the source code for springfox.documentation.swagger.readers.parameter.ParameterAllowableReader.java

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/*
 *
 *  Copyright 2015 the original author or authors.
 *
 *  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
 *
 *         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 springfox.documentation.swagger.readers.parameter;

import io.swagger.annotations.ApiParam;
import org.springframework.core.MethodParameter;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import springfox.documentation.schema.Enums;
import springfox.documentation.service.AllowableValues;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.ParameterBuilderPlugin;
import springfox.documentation.spi.service.contexts.ParameterContext;
import springfox.documentation.swagger.common.SwaggerPluginSupport;
import springfox.documentation.swagger.schema.ApiModelProperties;

import java.lang.annotation.Annotation;

import static com.google.common.base.Strings.*;

@Component("swaggerParameterAllowableReader")
@Order(SwaggerPluginSupport.SWAGGER_PLUGIN_ORDER)
public class ParameterAllowableReader implements ParameterBuilderPlugin {

    @Override
    public void apply(ParameterContext context) {
        MethodParameter methodParameter = context.methodParameter();
        AllowableValues allowableValues = null;
        String allowableValueString = findAnnotatedAllowableValues(methodParameter);
        if (!isNullOrEmpty(allowableValueString)) {
            allowableValues = ApiModelProperties.allowableValueFromString(allowableValueString);
        } else {
            if (methodParameter.getParameterType().isEnum()) {
                allowableValues = Enums.allowableValues(methodParameter.getParameterType());
            }
            if (methodParameter.getParameterType().isArray()) {
                allowableValues = Enums.allowableValues(methodParameter.getParameterType().getComponentType());
            }
        }
        context.parameterBuilder().allowableValues(allowableValues);
    }

    @Override
    public boolean supports(DocumentationType delimiter) {
        return SwaggerPluginSupport.pluginDoesApply(delimiter);
    }

    private String findAnnotatedAllowableValues(MethodParameter methodParameter) {
        Annotation[] methodAnnotations = methodParameter.getParameterAnnotations();
        if (null != methodAnnotations) {
            for (Annotation annotation : methodAnnotations) {
                if (annotation instanceof ApiParam) {
                    return ((ApiParam) annotation).allowableValues();
                }
            }
        }
        return null;
    }
}