net.firejack.platform.core.validation.NonEmptyCollectionProcessor.java Source code

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Here is the source code for net.firejack.platform.core.validation.NonEmptyCollectionProcessor.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 net.firejack.platform.core.validation;

import net.firejack.platform.core.validation.annotation.NonEmptyCollection;
import net.firejack.platform.core.validation.annotation.ValidationMode;
import net.firejack.platform.core.validation.constraint.vo.Constraint;
import net.firejack.platform.core.validation.exception.ImproperValidationArgumentException;
import net.firejack.platform.core.validation.exception.RuleValidationException;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

@Component
public class NonEmptyCollectionProcessor implements IMessageRuleProcessor {

    public List<ValidationMessage> validate(Method readMethod, String property, Object value, ValidationMode mode)
            throws RuleValidationException {
        List<ValidationMessage> validationMessages = new ArrayList<ValidationMessage>();
        Annotation annotation = readMethod.getAnnotation(NonEmptyCollection.class);
        if (annotation != null) {
            NonEmptyCollection notEmptyCollection = (NonEmptyCollection) annotation;
            String parameterName = StringUtils.isNotBlank(notEmptyCollection.parameterName())
                    ? notEmptyCollection.parameterName()
                    : property;
            if (value == null) {
                validationMessages.add(new ValidationMessage(property, notEmptyCollection.msgKey(), parameterName));
            }
            if (!(value instanceof Collection)) {
                throw new ImproperValidationArgumentException("Argument should be of type java.util.Collection");
            }
            if (((Collection) value).size() == 0) {
                validationMessages.add(new ValidationMessage(property, notEmptyCollection.msgKey(), parameterName));
            }
        }
        return validationMessages;
    }

    @Override
    public List<Constraint> generate(Method readMethod, String property, Map<String, String> params) {
        return null;
    }

}