InsertElementGenerator.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.ArrayList;
import java.util.List;
import java.util.Optional;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.OutputUtilities;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
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 InsertElementGenerator extends AbstractXmlMapperElementGenerator {

    private final boolean isSimple;

    protected InsertElementGenerator(Builder builder) {
        super(builder);
        this.isSimple = builder.isSimple;
    }

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

        FullyQualifiedJavaType parameterType;
        if (isSimple) {
            parameterType = new FullyQualifiedJavaType(introspectedTable.getBaseRecordType());
        } else {
            parameterType = introspectedTable.getRules().calculateAllFieldsClass();
        }

        StringBuilder insertClause = new StringBuilder();

        insertClause.append("insert into "); //$NON-NLS-1$
        insertClause.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
        insertClause.append(" ("); //$NON-NLS-1$

        StringBuilder valuesClause = new StringBuilder();
        valuesClause.append("values ("); //$NON-NLS-1$

        List<String> valuesClauses = new ArrayList<>();
        List<IntrospectedColumn> columns =
                ListUtilities.filterColumnsForInsert(introspectedTable.getAllColumns());
        XmlElement answer = buildInitialInsert(introspectedTable.getInsertStatementId(), parameterType);
        for (int i = 0; i < columns.size(); i++) {
            IntrospectedColumn introspectedColumn = columns.get(i);

            insertClause.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
            valuesClause.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
            if (i + 1 < columns.size()) {
                insertClause.append(", "); //$NON-NLS-1$
                valuesClause.append(", "); //$NON-NLS-1$
            }

            if (valuesClause.length() > 80) {
                answer.addElement(new TextElement(insertClause.toString()));
                insertClause.setLength(0);
                OutputUtilities.xmlIndent(insertClause, 1);

                valuesClauses.add(valuesClause.toString());
                valuesClause.setLength(0);
                OutputUtilities.xmlIndent(valuesClause, 1);
            }
        }

        insertClause.append(')');
        answer.addElement(new TextElement(insertClause.toString()));

        valuesClause.append(')');
        valuesClauses.add(valuesClause.toString());

        for (String clause : valuesClauses) {
            answer.addElement(new TextElement(clause));
        }

        return Optional.of(answer);
    }

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

    public static class Builder extends AbstractGeneratorBuilder<Builder> {
        private boolean isSimple;

        public Builder isSimple(boolean isSimple) {
            this.isSimple = isSimple;
            return this;
        }

        @Override
        protected Builder getThis() {
            return this;
        }

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