BaseRegularExpressionValidator.java

/**
 * Copyright (C) 2014 Stratio (http://stratio.com)
 *
 * Licensed 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 com.stratio.decision.functions.validator;

import com.stratio.decision.commons.constants.ReplyCode;
import com.stratio.decision.exception.RequestValidationException;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public abstract class BaseRegularExpressionValidator implements RequestValidation {

    private final Pattern pattern;

    public BaseRegularExpressionValidator(String regularExpression) {
        pattern = Pattern.compile(regularExpression);
    }

    public void stringMatch(String string) throws RequestValidationException {
        Matcher matcher = pattern.matcher(string);
        if (!matcher.matches()) {
            throw new RequestValidationException(ReplyCode.KO_STREAM_OPERATION_NOT_ALLOWED.getCode(),
                    getHumanReadableErrorMessage(string));
        }
    }

    public abstract String getHumanReadableErrorMessage(String stringValidated);

}