InsertSelectiveElementGenerator.java

/**
 *    Copyright 2006-2016 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
 *
 *       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.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
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.codegen.mybatis3.ListUtilities;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;
import org.mybatis.generator.config.GeneratedKey;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class InsertSelectiveElementGenerator extends
        AbstractXmlElementGenerator {

    public InsertSelectiveElementGenerator() {
        super();
    }

    @Override
    public void addElements(XmlElement parentElement) {
        XmlElement answer = new XmlElement("insert"); //$NON-NLS-1$

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

        FullyQualifiedJavaType parameterType = introspectedTable.getRules()
                .calculateAllFieldsClass();

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

        context.getCommentGenerator().addComment(answer);

        GeneratedKey gk = introspectedTable.getGeneratedKey();
        if (gk != null) {
            IntrospectedColumn introspectedColumn = introspectedTable
                .getColumn(gk.getColumn());
            // if the column is null, then it's a configuration error. The
            // warning has already been reported
            if (introspectedColumn != null) {
                if (gk.isJdbcStandard()) {
                    answer.addAttribute(new Attribute("useGeneratedKeys", "true")); //$NON-NLS-1$ //$NON-NLS-2$
                    answer.addAttribute(new Attribute("keyProperty", introspectedColumn.getJavaProperty())); //$NON-NLS-1$
                    answer.addAttribute(new Attribute("keyColumn", introspectedColumn.getActualColumnName())); //$NON-NLS-1$
                } else {
                    answer.addElement(getSelectKey(introspectedColumn, gk));
                }
            }
        }

        StringBuilder sb = new StringBuilder();

        sb.append("insert into "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
        answer.addElement(new TextElement(sb.toString()));

        XmlElement insertTrimElement = new XmlElement("trim"); //$NON-NLS-1$
        insertTrimElement.addAttribute(new Attribute("prefix", "(")); //$NON-NLS-1$ //$NON-NLS-2$
        insertTrimElement.addAttribute(new Attribute("suffix", ")")); //$NON-NLS-1$ //$NON-NLS-2$
        insertTrimElement.addAttribute(new Attribute("suffixOverrides", ",")); //$NON-NLS-1$ //$NON-NLS-2$
        answer.addElement(insertTrimElement);

        XmlElement valuesTrimElement = new XmlElement("trim"); //$NON-NLS-1$
        valuesTrimElement.addAttribute(new Attribute("prefix", "values (")); //$NON-NLS-1$ //$NON-NLS-2$
        valuesTrimElement.addAttribute(new Attribute("suffix", ")")); //$NON-NLS-1$ //$NON-NLS-2$
        valuesTrimElement.addAttribute(new Attribute("suffixOverrides", ",")); //$NON-NLS-1$ //$NON-NLS-2$
        answer.addElement(valuesTrimElement);

        for (IntrospectedColumn introspectedColumn : ListUtilities.removeIdentityAndGeneratedAlwaysColumns(introspectedTable
                .getAllColumns())) {

            if (introspectedColumn.isSequenceColumn()
                    || introspectedColumn.getFullyQualifiedJavaType().isPrimitive()) {
                // if it is a sequence column, it is not optional
                // This is required for MyBatis3 because MyBatis3 parses
                // and calculates the SQL before executing the selectKey
                
                // if it is primitive, we cannot do a null check
                sb.setLength(0);
                sb.append(MyBatis3FormattingUtilities
                    .getEscapedColumnName(introspectedColumn));
                sb.append(',');
                insertTrimElement.addElement(new TextElement(sb.toString()));

                sb.setLength(0);
                sb.append(MyBatis3FormattingUtilities
                    .getParameterClause(introspectedColumn));
                sb.append(',');
                valuesTrimElement.addElement(new TextElement(sb.toString()));

                continue;
            }            
            
            XmlElement insertNotNullElement = new XmlElement("if"); //$NON-NLS-1$
            sb.setLength(0);
            sb.append(introspectedColumn.getJavaProperty());
            sb.append(" != null"); //$NON-NLS-1$
            insertNotNullElement.addAttribute(new Attribute(
                    "test", sb.toString())); //$NON-NLS-1$

            sb.setLength(0);
            sb.append(MyBatis3FormattingUtilities
                    .getEscapedColumnName(introspectedColumn));
            sb.append(',');
            insertNotNullElement.addElement(new TextElement(sb.toString()));
            insertTrimElement.addElement(insertNotNullElement);

            XmlElement valuesNotNullElement = new XmlElement("if"); //$NON-NLS-1$
            sb.setLength(0);
            sb.append(introspectedColumn.getJavaProperty());
            sb.append(" != null"); //$NON-NLS-1$
            valuesNotNullElement.addAttribute(new Attribute(
                    "test", sb.toString())); //$NON-NLS-1$

            sb.setLength(0);
            sb.append(MyBatis3FormattingUtilities
                    .getParameterClause(introspectedColumn));
            sb.append(',');
            valuesNotNullElement.addElement(new TextElement(sb.toString()));
            valuesTrimElement.addElement(valuesNotNullElement);
        }

        if (context.getPlugins().sqlMapInsertSelectiveElementGenerated(
                answer, introspectedTable)) {
            parentElement.addElement(answer);
        }
    }
}