001/**
002 * Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * <p>
008 * http://www.apache.org/licenses/LICENSE-2.0
009 * <p>
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package io.jboot.components.valid.interceptor;
017
018import com.jfinal.aop.Interceptor;
019import com.jfinal.aop.Invocation;
020import com.jfinal.kit.Ret;
021import io.jboot.components.valid.ValidUtil;
022import io.jboot.utils.ClassUtil;
023
024import javax.validation.constraints.Pattern;
025import java.lang.reflect.Parameter;
026
027public class PatternInterceptor implements Interceptor {
028
029    @Override
030    public void intercept(Invocation inv) {
031        Parameter[] parameters = inv.getMethod().getParameters();
032        for (int index = 0; index < parameters.length; index++) {
033            Pattern pattern = parameters[index].getAnnotation(Pattern.class);
034            if (pattern == null) {
035                continue;
036            }
037
038            Object validObject = inv.getArg(index);
039            if (validObject == null || !matches(pattern, validObject.toString())) {
040                String reason = parameters[index].getName() + " is null or not matches the regex at method: " + ClassUtil.buildMethodString(inv.getMethod());
041                Ret paras = Ret.by("regexp", pattern.regexp());
042                ValidUtil.throwValidException(parameters[index].getName(), pattern.message(), paras, reason);
043            }
044        }
045
046
047        inv.invoke();
048    }
049
050    private static boolean matches(Pattern pattern, String value) {
051        Pattern.Flag[] flags = pattern.flags();
052        if (flags.length == 0) {
053            return value.matches(pattern.regexp());
054        }
055
056        int intFlag = 0;
057        for (Pattern.Flag flag : flags) {
058            intFlag = intFlag | flag.getValue();
059        }
060
061        java.util.regex.Pattern p = java.util.regex.Pattern.compile(pattern.regexp(), intFlag);
062        return p.matcher(value).matches();
063
064    }
065
066
067}