001/*
002 *  Copyright 2016 Anyware Services
003 *
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 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
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 org.ametys.plugins.core.impl.validator;
017
018import java.util.regex.Pattern;
019import java.util.regex.PatternSyntaxException;
020
021import org.apache.avalon.framework.configuration.Configuration;
022import org.apache.avalon.framework.configuration.ConfigurationException;
023
024import org.ametys.runtime.i18n.I18nizableText;
025import org.ametys.runtime.parameter.DefaultValidator;
026import org.ametys.runtime.parameter.Errors;
027
028/**
029 * This validator validates that the regular expression set is valid
030 *
031 */
032public class RegexpValidator extends DefaultValidator
033{
034    @Override
035    public void configure(Configuration configuration) throws ConfigurationException
036    {
037        Configuration validatorConfig = configuration.getChild("validation").getChild("custom-validator");
038        
039        _isMandatory = validatorConfig.getChild("mandatory", false) != null;
040
041        String regexp = validatorConfig.getChild("regexp").getValue(null);
042        if (regexp != null)
043        {
044            _regexp = Pattern.compile(regexp);
045        }
046        
047        Configuration textConfig = validatorConfig.getChild("invalidText", false);
048        if (textConfig != null)
049        {
050            _invalidText = I18nizableText.parseI18nizableText(textConfig, "plugin." + _pluginName);
051        }
052    }
053    
054    @Override
055    protected void validateSingleValue(Object value, Errors errors)
056    {
057        super.validateSingleValue(value, errors);
058        
059        _validateRegexp((String) value, errors);
060    }
061    
062    @Override
063    protected void validateArrayValues(Object[] values, Errors errors)
064    {
065        super.validateArrayValues(values, errors);
066        
067        for (Object value : values)
068        {
069            _validateRegexp((String) value, errors);
070        }
071    }
072    
073    private void _validateRegexp (String regexp, Errors errors)
074    {
075        if (regexp != null)
076        {
077            try
078            {
079                Pattern.compile(regexp);
080            }
081            catch (PatternSyntaxException e)
082            {
083                if (getLogger().isDebugEnabled())
084                {
085                    getLogger().debug("The regular expression '" + regexp + "' is not a valid one.");
086                }
087                
088                errors.addError(new I18nizableText("plugin.core-impl", "PLUGINS_CORE_VALIDATOR_REGEXP_FAILED"));
089            }
090        }
091    }
092}