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com.mercadopago.core.MPValidator Maven / Gradle / Ivy
package com.mercadopago.core;
import com.mercadopago.core.annotations.validation.NotNull;
import com.mercadopago.core.annotations.validation.Numeric;
import com.mercadopago.core.annotations.validation.Size;
import com.mercadopago.exceptions.MPValidationException;
import org.apache.commons.lang3.math.NumberUtils;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Vector;
/**
* Mercado Pago SDK
* Validator class
*
* Created by Eduardo Paoletta on 11/21/16.
*/
public class MPValidator {
/**
* Evaluates every field of an obj using Validation annotations
*
* @param objectToValidate Object to be evaluated
* @param
* @return
* @throws MPValidationException
*/
public static boolean validate(T objectToValidate) throws MPValidationException {
Collection colViolations = validate(new Vector(), objectToValidate);
if (!colViolations.isEmpty()) {
throw new MPValidationException(colViolations);
}
return true;
}
/**
* Auxiliar recursive method for evaluate an obj
*
* @param colViolations Collection of ValidateViolations
* @param objectToValidate Object to be evaluated
* @return
*/
private static Collection validate(Collection colViolations, Object objectToValidate) {
String className = objectToValidate.getClass().getSimpleName();
Field[] fields = MPCoreUtils.getAllFields(objectToValidate.getClass());
for(Field field : fields) {
Annotation[] annotations = field.getAnnotations();
if (annotations != null) {
Object value = null;
try {
field.setAccessible(true);
value = field.get(objectToValidate);
} catch (Exception ex) {
colViolations.add(new ValidationViolation(className, field.getName(), "is not accesible"));
}
if (value != null &&
value.getClass().getCanonicalName().indexOf("com.mercadopago.resources.datastructures.") == 0 &&
!value.getClass().getName().contains("$")) {
colViolations = validate(colViolations, value);
} else if (value != null &&
value.getClass().getCanonicalName().equals("java.util.ArrayList")) {
for (Object arrayItem : (ArrayList)value) {
colViolations = validate(colViolations, arrayItem);
}
} else {
for (Annotation annotation : annotations) {
if (annotation instanceof NotNull) {
if (value == null) {
colViolations.add(new ValidationViolation(className, field.getName(), "can not be 'null'"));
}
} else if (annotation instanceof Numeric) {
if (value != null) {
if (!NumberUtils.isNumber(value.toString())) {
colViolations.add(new ValidationViolation(className, field.getName(), "is not a valid number", value));
} else {
Float floatValue = Float.parseFloat(value.toString());
String stringValue = NumberUtils.createBigDecimal(value.toString()).toString();
Numeric numeric = (Numeric) annotation;
if (numeric.min() > floatValue) {
colViolations.add(new ValidationViolation(className, field.getName(), "falls short of the minimum value", stringValue, numeric.min()));
}
if (numeric.max() < floatValue) {
colViolations.add(new ValidationViolation(className, field.getName(), "exceeds the maximum value", stringValue, numeric.max()));
}
if (numeric.fractionDigits() > -1) {
if (stringValue.contains(".") &&
stringValue.substring(String.valueOf((floatValue)).indexOf(".") + 1).length() > numeric.fractionDigits()) {
colViolations.add(new ValidationViolation(className, field.getName(), "exceeds the maximum decimal digits", stringValue, numeric.fractionDigits()));
}
}
}
}
} else if (annotation instanceof Size) {
if (value != null) {
String stringValue = value.toString();
Size size = (Size) annotation;
if (size.min() > -1 &&
stringValue.length() < size.min()) {
colViolations.add(new ValidationViolation(className, field.getName(), "fall short of the minimum length", stringValue.length(), size.min()));
}
if (size.max() > -1 &&
stringValue.length() > size.max()) {
colViolations.add(new ValidationViolation(className, field.getName(), "exceed the maximum length value", stringValue.length(), size.max()));
}
}
}
}
}
}
}
return colViolations;
}
}
