net.firejack.platform.core.validation.NotMatchProcessor.java Source code

Introduction

Here is the source code for net.firejack.platform.core.validation.NotMatchProcessor.java

Source

/*
 * 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 net.firejack.platform.core.validation;

import net.firejack.platform.core.utils.MessageResolver;
import net.firejack.platform.core.validation.annotation.NotMatch;
import net.firejack.platform.core.validation.annotation.ValidationMode;
import net.firejack.platform.core.validation.constraint.vo.Constraint;
import net.firejack.platform.core.validation.constraint.vo.RuleParameter;
import net.firejack.platform.core.validation.exception.ImproperValidationArgumentException;
import net.firejack.platform.core.validation.exception.RuleValidationException;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

@Component
public class NotMatchProcessor implements IMessageRuleProcessor {
    private static final Logger logger = Logger.getLogger(NotMatchProcessor.class);
    public static final String[] words = new String[] { "abstract", "continue", "for", "new", "switch", "assert",
            "default", "goto", "package", "synchronized", "boolean", "do", "if", "private", "this", "break",
            "double", "implements", "protected", "throw", "byte", "else", "import", "public", "throws", "case",
            "enum", "instanceof", "return", "transient", "catch", "extends", "int", "short", "try", "char", "final",
            "interface", "static", "void", "class", "finally", "long", "strictfp", "volatile", "const", "float",
            "native", "super", "while" };
    private Map<String, Pattern> cachedPatterns;

    /**
     * @return
     */
    public Map<String, Pattern> getCachedPatterns() {
        if (cachedPatterns == null) {
            cachedPatterns = new HashMap<String, Pattern>();
        }
        return cachedPatterns;
    }

    @Override
    public List<ValidationMessage> validate(Method readMethod, String property, Object value, ValidationMode mode)
            throws RuleValidationException {
        List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
        NotMatch notMatchAnnotation = readMethod.getAnnotation(NotMatch.class);
        if (notMatchAnnotation != null && StringUtils.isNotBlank(notMatchAnnotation.expression())) {
            Class<?> returnType = readMethod.getReturnType();
            if (returnType == String.class) {
                Pattern pattern = getCachedPatterns().get(notMatchAnnotation.expression());
                if (pattern == null) {
                    try {
                        pattern = Pattern.compile(notMatchAnnotation.expression());
                        getCachedPatterns().put(notMatchAnnotation.expression(), pattern);
                    } catch (PatternSyntaxException e) {
                        logger.error(e.getMessage(), e);
                        throw new ImproperValidationArgumentException(
                                "Pattern expression should have correct syntax.");
                    }
                }
                if (value != null) {
                    String sValue = (String) value;
                    if (StringUtils.isNotBlank(sValue) && pattern.matcher(sValue).matches()) {
                        messages.add(new ValidationMessage(property, notMatchAnnotation.msgKey(),
                                notMatchAnnotation.parameterName()));
                    }
                }
            }
        }

        if (notMatchAnnotation != null && !notMatchAnnotation.javaWords()) {
            Class<?> returnType = readMethod.getReturnType();
            if (returnType == String.class && StringUtils.isNotBlank((String) value)) {
                String s = (String) value;
                for (String word : words) {
                    if (word.equals(s)) {
                        messages.add(new ValidationMessage(property, notMatchAnnotation.msgKey(), word));
                    }
                }
            }
        }

        return messages;
    }

    @Override
    public List<Constraint> generate(Method readMethod, String property, Map<String, String> params) {
        List<Constraint> constraints = null;
        NotMatch notMatch = readMethod.getAnnotation(NotMatch.class);
        if (notMatch != null) {
            Constraint constraint = new Constraint(notMatch.annotationType().getSimpleName());
            String errorMessage = MessageResolver.messageFormatting(notMatch.msgKey(), Locale.ENGLISH, property,
                    notMatch.example()); //TODO need to set real locale
            constraint.setErrorMessage(errorMessage);
            List<RuleParameter> ruleParameters = new ArrayList<RuleParameter>();

            String expression = notMatch.expression();
            if (StringUtils.isNotBlank(expression)) {
                RuleParameter expressionParam = new RuleParameter("expression", expression);
                ruleParameters.add(expressionParam);
            }

            if (!notMatch.javaWords()) {
                RuleParameter ruleParameter = new RuleParameter("words", words);
                ruleParameters.add(ruleParameter);
            }

            if (!ruleParameters.isEmpty()) {
                constraints = new ArrayList<Constraint>();
                constraint.setParams(ruleParameters);
                constraints.add(constraint);
            }
        }
        return constraints;
    }

}