com.jfinal.core.paragetter.EnumGetter Maven / Gradle / Ivy

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/**
 * Copyright (c) 2011-2017, 玛雅牛 (myaniu AT gmail.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.jfinal.core.paragetter;

import com.jfinal.core.Action;
import com.jfinal.core.Controller;
import com.jfinal.kit.StrKit;

@SuppressWarnings({"unchecked", "rawtypes"})
public class EnumGetter extends ParaGetter {
	private final Class enumType;
	public EnumGetter(Class enumType, String parameterName, String defaultValue) {
		super(parameterName, defaultValue);
		this.enumType = enumType;
	}

	@Override
	public T get(Action action, Controller c) {
		String value = c.getPara(this.getParameterName());
		if(StrKit.notBlank(value)){
			return to(value);
		}
		return this.getDefaultValue();
	}

	@Override
	protected T to(String v) {
		if(StrKit.notBlank(v)){
			try{
				return (T) Enum.valueOf(this.enumType, v.trim());
			}catch(Exception e){
				return null;
			}
		}
		return null;
	}
}