com.tdclighthouse.commons.simpleform.validation.validator.item.PatternMatchValidator.java Source code

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Here is the source code for com.tdclighthouse.commons.simpleform.validation.validator.item.PatternMatchValidator.java

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/*
 *  Copyright 2012 Finalist B.V.
 * 
 *  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.tdclighthouse.commons.simpleform.validation.validator.item;

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

import org.apache.commons.lang.StringUtils;

import com.tdclighthouse.commons.simpleform.html.FormItem;
import com.tdclighthouse.commons.simpleform.validation.FormItemValidator;

/**
 * @author Ebrahim Aharpour
 * 
 */
public class PatternMatchValidator extends ConditionalValidator implements FormItemValidator {

    @Override
    public boolean validate(FormItem item, String param) {
        if (isConditionalValidator(param, CONDITIONAL_VALIDATION)) {
            if (isConditionSatisfied(item, param, CONDITIONAL_VALIDATION)) {
                return performValidation(item, param);
            } else {
                item.setErrorMessage(null);
                return true;
            }
        } else {
            return performValidation(item, param);
        }
    }

    private boolean performValidation(FormItem item, String param) {
        boolean result = true;
        item.setErrorMessage(null);
        String value = item.getValue();
        if (!StringUtils.isBlank(value)) {
            value = value.trim();
            Pattern pattern = Pattern.compile(param);
            Matcher matcher = pattern.matcher(value);
            if (matcher.find()) {
                result = ((matcher.start() == 0) && (matcher.end() == value.length()));
            } else {
                result = false;
                item.setErrorMessage(getMessage());
            }
        }
        return result;
    }

    protected String getMessage() {
        return "simpleform.validation.pattern.does.not.match";
    }

}