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TopNByExamplePlugin.java
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package com.revengemission.plugins.mybatis;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.Document;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import java.util.List;
/**
* TopN
*/
public class TopNByExamplePlugin extends AbstractXmbgPlugin {
private static final String FIELD_NAME = "topN";
private static final String CLIENT_METHOD_NAME = "topOneByExample";
private static final String CLIENT_METHOD_NAME2 = "topNByExample";
@Override
public boolean validate(List<String> warnings) {
return true;
}
@Override
public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
Field field = new Field(FIELD_NAME, FullyQualifiedJavaType.getIntInstance());
field.setVisibility(JavaVisibility.PRIVATE);
field.setInitializationString("5");
topLevelClass.addField(field);
char c = FIELD_NAME.charAt(0);
String camelName = Character.toUpperCase(c) + FIELD_NAME.substring(1);
Method method = new Method("set" + camelName);
method.setVisibility(JavaVisibility.PUBLIC);
method.addParameter(new Parameter(FullyQualifiedJavaType.getIntInstance(), FIELD_NAME));
method.addBodyLine("this." + FIELD_NAME + "=" + FIELD_NAME + ";");
topLevelClass.addMethod(method);
method = new Method("get" + camelName);
method.setVisibility(JavaVisibility.PUBLIC);
method.setReturnType(FullyQualifiedJavaType.getIntInstance());
method.addBodyLine("return " + FIELD_NAME + ";");
topLevelClass.addMethod(method);
return super.modelExampleClassGenerated(topLevelClass, introspectedTable);
}
@Override
public boolean clientGenerated(Interface interfaze, IntrospectedTable introspectedTable) {
{
Method method = new Method(CLIENT_METHOD_NAME);
method.setAbstract(true);
method.addParameter(new Parameter(new FullyQualifiedJavaType(introspectedTable.getExampleType()), "example"));
method.setReturnType(new FullyQualifiedJavaType(getEntityName(introspectedTable)));
interfaze.addMethod(method);
}
{
Method method = new Method(CLIENT_METHOD_NAME2);
method.setAbstract(true);
method.addParameter(new Parameter(new FullyQualifiedJavaType(introspectedTable.getExampleType()), "example"));
method.setReturnType(new FullyQualifiedJavaType("List<" + getEntityName(introspectedTable) + ">"));
interfaze.addMethod(method);
}
return true;
}
@Override
public boolean sqlMapDocumentGenerated(Document document, IntrospectedTable introspectedTable) {
XmlElement parentElement = document.getRootElement();
{
XmlElement selectTopOneElement = new XmlElement("select");
selectTopOneElement.addAttribute(new Attribute("id", CLIENT_METHOD_NAME));
selectTopOneElement.addAttribute(new Attribute("parameterType", introspectedTable.getExampleType()));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
selectTopOneElement.addAttribute(new Attribute("resultMap", "ResultMapWithBLOBs"));
} else {
selectTopOneElement.addAttribute(new Attribute("resultMap", "BaseResultMap"));
}
addTopOneLimitStatement(selectTopOneElement, introspectedTable);
addTopOneSqlserverStatement(selectTopOneElement, introspectedTable);
addTopOneDB2Statement(selectTopOneElement, introspectedTable);
parentElement.addElement(selectTopOneElement);
}
{
XmlElement selectTopNElement = new XmlElement("select");
selectTopNElement.addAttribute(new Attribute("id", CLIENT_METHOD_NAME2));
selectTopNElement.addAttribute(new Attribute("parameterType", introspectedTable.getExampleType()));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
selectTopNElement.addAttribute(new Attribute("resultMap", "ResultMapWithBLOBs"));
} else {
selectTopNElement.addAttribute(new Attribute("resultMap", "BaseResultMap"));
}
addTopNLimitStatement(selectTopNElement, introspectedTable);
addTopNSqlserverStatement(selectTopNElement, introspectedTable);
addTopNDB2Statement(selectTopNElement, introspectedTable);
parentElement.addElement(selectTopNElement);
}
return super.sqlMapDocumentGenerated(document, introspectedTable);
}
void addTopOneLimitStatement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'mysql' or _databaseId == 'postgresql' or _databaseId == 'sqlite'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
XmlElement orderByElement = new XmlElement("if");
orderByElement.addAttribute(new Attribute("test", "orderByClause != null"));
orderByElement.addElement(new TextElement("order by ${orderByClause}"));
topOneElement.addElement(orderByElement);
topOneElement.addElement(new TextElement("limit 1"));
parentElement.addElement(topOneElement);
}
void addTopNLimitStatement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'mysql' or _databaseId == 'postgresql' or _databaseId == 'sqlite'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
XmlElement orderByElement = new XmlElement("if");
orderByElement.addAttribute(new Attribute("test", "orderByClause != null"));
orderByElement.addElement(new TextElement("order by ${orderByClause}"));
topOneElement.addElement(orderByElement);
topOneElement.addElement(new TextElement("limit ${topN}"));
parentElement.addElement(topOneElement);
}
void addTopOneSqlserverStatement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'sqlserver'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select top 1 <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select top 1 <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
XmlElement orderByElement = new XmlElement("if");
orderByElement.addAttribute(new Attribute("test", "orderByClause != null"));
orderByElement.addElement(new TextElement("order by ${orderByClause}"));
topOneElement.addElement(orderByElement);
parentElement.addElement(topOneElement);
}
void addTopNSqlserverStatement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'sqlserver'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select top ${topN} <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select top ${topN} <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
XmlElement orderByElement = new XmlElement("if");
orderByElement.addAttribute(new Attribute("test", "orderByClause != null"));
orderByElement.addElement(new TextElement("order by ${orderByClause}"));
topOneElement.addElement(orderByElement);
parentElement.addElement(topOneElement);
}
void addTopOneDB2Statement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'db2'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
topOneElement.addElement(new TextElement("fetch first 1 only"));
parentElement.addElement(topOneElement);
}
void addTopNDB2Statement(XmlElement parentElement, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();
XmlElement topOneElement = new XmlElement("if");
topOneElement.addAttribute(new Attribute("test", "_databaseId == 'db2'"));
if (!introspectedTable.getBLOBColumns().isEmpty()) {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" />, <include refid=\"Blob_Column_List\" /> from " + tableName + " mt"));
} else {
topOneElement.addElement(new TextElement("select <include refid=\"Base_Column_List\" /> from " + tableName + " mt"));
}
topOneElement.addElement(new TextElement("<include refid=\"Example_Where_Clause\" />"));
topOneElement.addElement(new TextElement("fetch first ${topN} only"));
parentElement.addElement(topOneElement);
}
}