cherry.example.web.util.ViewNameUtil.java Source code

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Here is the source code for cherry.example.web.util.ViewNameUtil.java

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/*
 * Copyright 2015 agwlvssainokuni
 *
 * 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 cherry.example.web.util;

import java.lang.reflect.Method;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder.MethodInvocationInfo;
import org.springframework.web.util.UriComponentsBuilder;

public class ViewNameUtil {

    public static String fromMethodCall(Object invocationInfo) {

        MethodInvocationInfo info = (MethodInvocationInfo) invocationInfo;
        Method method = info.getControllerMethod();
        Class<?> type = method.getDeclaringClass();

        UriComponentsBuilder ucb = UriComponentsBuilder.newInstance();
        String typePath = getMappedPath(type.getAnnotation(RequestMapping.class));
        if (StringUtils.isNotEmpty(typePath)) {
            ucb.path(typePath);
        }

        String methodPath = getMappedPath(method.getAnnotation(RequestMapping.class));
        if (StringUtils.isNotEmpty(methodPath)) {
            ucb.pathSegment(methodPath);
        }

        String path = ucb.build().getPath();
        if (path.startsWith("/")) {
            return path.substring(1);
        }
        return path;
    }

    public static String getMappedPath(RequestMapping mapping) {
        String[] path = mapping.value();
        if (CollectionUtils.sizeIsEmpty(path)) {
            return null;
        }
        return path[0];
    }

}