org.apache.bval.constraints.PatternValidator Maven / Gradle / Ivy
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* 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.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* validator using a regular expression,
* based on the jsr303 Pattern constraint annotation.
*/
public class PatternValidator implements ConstraintValidator {
protected java.util.regex.Pattern pattern;
public void initialize(Pattern annotation) {
Pattern.Flag flags[] = annotation.flags();
int intFlag = 0;
for (Pattern.Flag flag : flags) {
intFlag = intFlag | flag.getValue();
}
try {
pattern = java.util.regex.Pattern.compile(annotation.regexp(), intFlag);
} catch (PatternSyntaxException e) {
throw new IllegalArgumentException("Invalid regular expression.", e);
}
}
public boolean isValid(String value, ConstraintValidatorContext context) {
return value == null || pattern.matcher(value).matches();
}
}