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/*
 *  Copyright 2007 The Apache Software Foundation
 *
 *  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 org.mybatis.generator.config;

import static org.mybatis.generator.internal.util.StringUtility.stringHasValue;
import static org.mybatis.generator.internal.util.messages.Messages.getString;

import java.util.List;

import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.XmlElement;

/**
 * This class is used to specify a renaming rule for columns in a table. This
 * renaming rule will be run against all column names before calculating the
 * corresponding property name. The most common use case is when columns in a
 * table are all prefixed by a certain value.
 * 
 * For example, if columns in a table are named:
 * 
 * 
 * CUST_NAME
 * CUST_ADDRESS
 * CUST_CITY
 * CUST_STATE
 * 
 * 
 * it might be annoying to have the generated properties all containing the CUST
 * prefix. This class can be used to remove the prefix by specifying
 * 
 * 
 * searchString = "^CUST"
 * replaceString=""
 * 
 * 
 * Note that internally, the generator uses the
 * java.util.regex.Matcher.replaceAll method for this function. See
 * the documentation of that method for example of the regular expression
 * language used in Java.
 * 
 * @author Jeff Butler
 * 
 */
public class ColumnRenamingRule {
    private String searchString;
    private String replaceString;

    public String getReplaceString() {
        return replaceString;
    }

    public void setReplaceString(String replaceString) {
        this.replaceString = replaceString;
    }

    public String getSearchString() {
        return searchString;
    }

    public void setSearchString(String searchString) {
        this.searchString = searchString;
    }

    public void validate(List errors, String tableName) {
        if (!stringHasValue(searchString)) {
            errors.add(getString("ValidationError.14", tableName)); //$NON-NLS-1$
        }
    }

    public XmlElement toXmlElement() {
        XmlElement xmlElement = new XmlElement("columnRenamingRule"); //$NON-NLS-1$
        xmlElement.addAttribute(new Attribute("searchString", searchString)); //$NON-NLS-1$

        if (replaceString != null) {
            xmlElement.addAttribute(new Attribute(
                    "replaceString", replaceString)); //$NON-NLS-1$
        }

        return xmlElement;
    }
}