UpdateByExampleSelectiveElementGenerator.java

/*
 *    Copyright 2006-2026 the original author or authors.
 *
 *    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
 *
 *       https://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.runtime.mybatis3.xmlmapper.elements;

import java.util.Optional;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.runtime.mybatis3.ListUtilities;
import org.mybatis.generator.runtime.mybatis3.MyBatis3FormattingUtilities;

public class UpdateByExampleSelectiveElementGenerator extends AbstractXmlMapperElementGenerator {

    protected UpdateByExampleSelectiveElementGenerator(Builder builder) {
        super(builder);
    }

    @Override
    public Optional<XmlElement> generateElement() {
        if (!introspectedTable.getRules().generateUpdateByExampleSelective()) {
            return Optional.empty();
        }

        XmlElement answer = new XmlElement("update"); //$NON-NLS-1$

        answer.addAttribute(new Attribute(
                "id", introspectedTable.getUpdateByExampleSelectiveStatementId())); //$NON-NLS-1$

        answer.addAttribute(new Attribute("parameterType", "map")); //$NON-NLS-1$ //$NON-NLS-2$

        commentGenerator.addComment(answer);

        StringBuilder sb = new StringBuilder();
        sb.append("update "); //$NON-NLS-1$
        sb.append(introspectedTable.getAliasedFullyQualifiedRuntimeTableName());
        answer.addElement(new TextElement(sb.toString()));

        XmlElement dynamicElement = new XmlElement("set"); //$NON-NLS-1$
        answer.addElement(dynamicElement);

        for (IntrospectedColumn introspectedColumn :
                ListUtilities.filterColumnsForUpdate(introspectedTable.getAllColumns())) {
            sb.setLength(0);
            sb.append(introspectedColumn.getJavaProperty("row.")); //$NON-NLS-1$
            sb.append(" != null"); //$NON-NLS-1$
            XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
            isNotNullElement.addAttribute(new Attribute("test", sb.toString())); //$NON-NLS-1$
            dynamicElement.addElement(isNotNullElement);

            sb.setLength(0);
            sb.append(MyBatis3FormattingUtilities.getAliasedEscapedColumnName(introspectedColumn));
            sb.append(" = "); //$NON-NLS-1$
            sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn, "row.")); //$NON-NLS-1$
            sb.append(',');

            isNotNullElement.addElement(new TextElement(sb.toString()));
        }

        answer.addElement(getUpdateByExampleIncludeElement());

        return Optional.of(answer);
    }

    @Override
    public boolean callPlugins(XmlElement element) {
        return pluginAggregator.sqlMapUpdateByExampleSelectiveElementGenerated(element, introspectedTable);
    }

    public static class Builder extends AbstractGeneratorBuilder<Builder> {
        @Override
        protected Builder getThis() {
            return this;
        }

        public UpdateByExampleSelectiveElementGenerator build() {
            return new UpdateByExampleSelectiveElementGenerator(this);
        }
    }
}