| /* |
| * 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 java.lang.annotation.Annotation; |
| import java.util.function.Function; |
| import java.util.regex.Pattern; |
| import java.util.regex.PatternSyntaxException; |
| |
| import javax.validation.ConstraintValidator; |
| import javax.validation.ConstraintValidatorContext; |
| import javax.validation.constraints.Pattern.Flag; |
| |
| import org.apache.bval.util.Validate; |
| |
| public abstract class AbstractPatternValidator<A extends Annotation, T extends CharSequence> |
| implements ConstraintValidator<A, T> { |
| |
| public interface PatternDescriptor { |
| String regexp(); |
| |
| Flag[] flags(); |
| } |
| |
| private final Function<A, PatternDescriptor> toDescriptor; |
| |
| protected Pattern pattern; |
| |
| protected AbstractPatternValidator(Function<A, PatternDescriptor> toDescriptor) { |
| super(); |
| this.toDescriptor = Validate.notNull(toDescriptor); |
| } |
| |
| @Override |
| public void initialize(A constraintAnnotation) { |
| ConstraintValidator.super.initialize(constraintAnnotation); |
| |
| final PatternDescriptor pd = toDescriptor.apply(constraintAnnotation); |
| |
| final Flag flags[] = pd.flags(); |
| int intFlag = 0; |
| for (Flag flag : flags) { |
| intFlag = intFlag | flag.getValue(); |
| } |
| try { |
| pattern = Pattern.compile(pd.regexp(), intFlag); |
| } catch (PatternSyntaxException e) { |
| throw new IllegalArgumentException("Invalid regular expression.", e); |
| } |
| } |
| |
| @Override |
| public boolean isValid(T value, ConstraintValidatorContext context) { |
| return value == null || pattern.matcher(value).matches(); |
| } |
| } |