DefaultValueChecker.java

/**
 * 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.seyren.core.service.checker;

import java.math.BigDecimal;

import javax.inject.Named;

import com.seyren.core.domain.AlertType;

@Named
public class DefaultValueChecker implements ValueChecker {
    
    @Override
    public AlertType checkValue(BigDecimal value, BigDecimal warn, BigDecimal error) {
        
        boolean isHighValueWorse = isTheValueBeingHighWorse(warn, error);
        
        if (isBeyondThreshold(value, error, isHighValueWorse)) {
            return AlertType.ERROR;
        } else if (isBeyondThreshold(value, warn, isHighValueWorse)) {
            return AlertType.WARN;
        }
        
        return AlertType.OK;
        
    }
    
    private boolean isBeyondThreshold(BigDecimal value, BigDecimal threshold, boolean isHighValueWorse) {
        if (isHighValueWorse) {
            return value.compareTo(threshold) >= 0;
        }
        return value.compareTo(threshold) <= 0;
    }
    
    private boolean isTheValueBeingHighWorse(BigDecimal warn, BigDecimal error) {
        return warn.compareTo(error) <= 0;
    }
    
}