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Jave Web Validator Framework

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/*
 * Copyright 2016-2017, Youqian Yue ([email protected]).
 *
 * 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 org.devefx.validator.constraints;

import org.devefx.validator.ConstraintValidator;
import org.devefx.validator.script.annotation.Script;

@Script
public class AssertFalse implements ConstraintValidator {

    @Override
    public boolean isValid(Object value) {
        //null values are valid
        if (value == null) {
            return true;
        }
        // converter type
        Boolean bool;
        if (value instanceof Boolean) {
            bool = (Boolean)value;
        } else if (value instanceof String) {
            bool = value.equals("true");
        } else {
            throw new IllegalArgumentException("Unsupported of type [" + value.getClass().getName() + "]");
        }
        return !bool;
    }

}