| /* |
| * Copyright 2010 Google Inc. |
| * |
| * 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.google.gwt.validation.client.constraints; |
| |
| import java.math.BigDecimal; |
| |
| import javax.validation.ConstraintValidator; |
| import javax.validation.constraints.Digits; |
| |
| /** |
| * Abstract {@link Digits} constraint validator implementation for a |
| * <code>T</code>. |
| * |
| * @param <T> the type of object to validate |
| */ |
| public abstract class AbstractDigitsValidator<T> implements |
| ConstraintValidator<Digits, T> { |
| |
| private int fraction; |
| private int integer; |
| |
| @Override |
| public final void initialize(Digits constraintAnnotation) { |
| if (!(constraintAnnotation.fraction() >= 0)) { |
| throw new IllegalArgumentException( |
| "@Digits.fraction must be a nonnegative nubmer"); |
| } |
| if (!(constraintAnnotation.integer() >= 0)) { |
| throw new IllegalArgumentException( |
| "@Digits.integer must be a nonnegative nubmer"); |
| } |
| fraction = constraintAnnotation.fraction(); |
| integer = constraintAnnotation.integer(); |
| } |
| |
| protected final boolean isValid(BigDecimal bigValue) { |
| int integerLength = bigValue.precision() - bigValue.scale(); |
| if (integerLength > integer) { |
| return false; |
| } |
| int fractionalLength = bigValue.scale() < 0 ? 0 : bigValue.scale(); |
| return fractionalLength <= fraction; |
| } |
| } |