com.art4ul.jcoon.handlers.RequestParamAnnotationBeforeHandler.java Source code

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Here is the source code for com.art4ul.jcoon.handlers.RequestParamAnnotationBeforeHandler.java

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/*
 * Copyright (C) 2014 Artsem Semianenka (http://art4ul.com/)
 *
 * 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 com.art4ul.jcoon.handlers;

import com.art4ul.jcoon.annotations.infrastructure.Before;
import com.art4ul.jcoon.annotations.infrastructure.ProcessAnnotation;
import com.art4ul.jcoon.context.Context;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ValueConstants;

import java.lang.annotation.Annotation;

@ProcessAnnotation(RequestParam.class)
@Before
class RequestParamAnnotationBeforeHandler implements ParamAnnotationHandler {

    @Override
    public void doHandle(Context context, Annotation annotation, Object paramValue) {
        RequestParam requestParam = (RequestParam) annotation;
        if (requestParam.value() != null && !requestParam.value().isEmpty()) {

            // Check null and set default value
            String param;
            if (paramValue == null) {
                if (requestParam.defaultValue() != ValueConstants.DEFAULT_NONE) {
                    param = requestParam.defaultValue();
                } else {
                    param = "";
                }
            } else {
                param = paramValue.toString();
            }

            context.addHttpParam(requestParam.value(), param);
        }

    }
}