| /* |
| * 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 org.apache.bval.constraints; |
| |
| import javax.validation.ConstraintValidator; |
| import javax.validation.ConstraintValidatorContext; |
| import javax.validation.constraints.Digits; |
| import java.math.BigDecimal; |
| |
| /** |
| * Validates that the <code>String</code> being validated consists of digits, |
| * and matches the pattern defined in the constraint. |
| */ |
| public class DigitsValidatorForString implements ConstraintValidator<Digits, String> { |
| |
| private int integral; |
| private int fractional; |
| |
| public int getIntegral() { |
| return integral; |
| } |
| |
| public void setIntegral(int integral) { |
| this.integral = integral; |
| } |
| |
| public int getFractional() { |
| return fractional; |
| } |
| |
| public void setFractional(int fractional) { |
| this.fractional = fractional; |
| } |
| |
| public void initialize(Digits annotation) { |
| this.integral = annotation.integer(); |
| this.fractional = annotation.fraction(); |
| if (integral < 0) { |
| throw new IllegalArgumentException( |
| "The length of the integer part cannot be negative."); |
| } |
| if (fractional < 0) { |
| throw new IllegalArgumentException( |
| "The length of the fraction part cannot be negative."); |
| } |
| } |
| |
| public boolean isValid(String str, ConstraintValidatorContext context) { |
| //null values are valid |
| if (str == null) { |
| return true; |
| } |
| |
| BigDecimal bigDecimal = getBigDecimalValue(str); |
| if (bigDecimal == null) { |
| return false; |
| } |
| |
| int intLength = bigDecimal.precision() - bigDecimal.scale(); |
| if (integral >= intLength) { |
| int factionLength = bigDecimal.scale() < 0 ? 0 : bigDecimal.scale(); |
| return fractional >= factionLength; |
| } else { |
| return false; |
| } |
| } |
| |
| private BigDecimal getBigDecimalValue(String str) { |
| BigDecimal bd; |
| try { |
| bd = new BigDecimal(str); |
| } catch (NumberFormatException nfe) { |
| return null; |
| } |
| return bd; |
| } |
| } |