org.tinygroup.springmvc.support.ConventionRestfulWebArgumentResolver.java Source code

Introduction

Here is the source code for org.tinygroup.springmvc.support.ConventionRestfulWebArgumentResolver.java

Source

/**
 *  Copyright (c) 1997-2013, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.springmvc.support;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.PropertyEditorRegistrySupport;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebArgumentResolver;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.servlet.HandlerMapping;
import org.tinygroup.springmvc.coc.impl.RestfulConventionHandlerMethodResolver;

import java.beans.PropertyEditor;
import java.util.Map;

/**
 * Restful??
 * 
 */
public class ConventionRestfulWebArgumentResolver extends PropertyEditorRegistrySupport
        implements WebArgumentResolver {

    public ConventionRestfulWebArgumentResolver() {
        registerDefaultEditors();
    }

    @SuppressWarnings("unchecked")
    public Object resolveArgument(MethodParameter methodParameter, NativeWebRequest webRequest) throws Exception {

        if (!isConventionalRestful(webRequest)) {
            return UNRESOLVED;
        }
        // and the paramName is id
        if (!StringUtils.equals("id", methodParameter.getParameterName())) {
            return UNRESOLVED;
        }

        Map<String, String> uriTemplateVariables = null;
        if (BeanUtils.isSimpleProperty(methodParameter.getParameterType())) {
            uriTemplateVariables = (Map<String, String>) webRequest
                    .getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST);
        }
        if (uriTemplateVariables != null) {
            String val = uriTemplateVariables.get(methodParameter.getParameterName());
            if (val != null && String.class.equals(methodParameter.getParameterType())) {
                return val;
            } else if (val != null) {
                PropertyEditor editor = getDefaultEditor(methodParameter.getParameterType());
                if (editor != null) {
                    editor.setAsText(val);
                    return editor.getValue();
                }
            }
        }
        return UNRESOLVED;
    }

    private boolean isConventionalRestful(NativeWebRequest webRequest) {
        Object obj = webRequest.getAttribute(RestfulConventionHandlerMethodResolver.RESTFUL_CONVENTION_VIEW_PATH,
                RequestAttributes.SCOPE_REQUEST);
        return obj == null ? false : true;
    }
}