package com.landtool.lanbase.common.utils;
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import java.io.File;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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import org.apache.commons.configuration.Configuration;
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import org.apache.commons.configuration.ConfigurationException;
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import org.apache.commons.configuration.PropertiesConfiguration;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang.StringUtils;
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import org.apache.commons.lang.WordUtils;
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import org.apache.velocity.Template;
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import org.apache.velocity.VelocityContext;
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import org.apache.velocity.app.Velocity;
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import com.landtool.lanbase.common.exception.LanbaseException;
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import com.landtool.lanbase.modules.sys.entity.SysColumn;
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import com.landtool.lanbase.modules.sys.entity.SysTable;
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/**
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* @author lanbase
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* @Description: TODO(代码生成器工具类)
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* @date 2017-6-23 15:07
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*/
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public class GeneratorUtils {
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public static List<String> getTemplates(){
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List<String> templates = new ArrayList<String>();
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templates.add("templates/generator/Entity.java.vm");
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templates.add("templates/generator/Dao.java.vm");
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templates.add("templates/generator/Dao.xml.vm");
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templates.add("templates/generator/Service.java.vm");
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templates.add("templates/generator/ServiceImpl.java.vm");
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templates.add("templates/generator/Controller.java.vm");
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templates.add("templates/generator/list.html.vm");
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templates.add("templates/generator/list.js.vm");
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return templates;
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}
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/**
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* 生成代码
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*/
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public static void generatorCode(Map<String, String> table,
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List<Map<String, String>> columns, ZipOutputStream zip){
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//配置信息
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Configuration config = getConfig();
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//表信息
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SysTable sysTable = new SysTable();
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sysTable.setTableName(table.get("tableName"));
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sysTable.setComments(table.get("tableComment"));
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//表名转换成Java类名
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String className = tableToJava(sysTable.getTableName(), config.getString("tablePrefix"));
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sysTable.setClassName(className); ////全部单词首字母大写
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sysTable.setClassname(StringUtils.uncapitalize(className)); ////首字母小写，驼峰
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//列信息
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List<SysColumn> columsList = new ArrayList<>();
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for(Map<String, String> column : columns){
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SysColumn sysColumn = new SysColumn();
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sysColumn.setColumnName(column.get("columnName"));
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sysColumn.setDataType(column.get("dataType"));
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sysColumn.setComments(column.get("columnComment"));
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sysColumn.setExtra(column.get("extra"));
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//列名转换成Java属性名
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String attrName = columnToJava(sysColumn.getColumnName());
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sysColumn.setAttrName(attrName);
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sysColumn.setAttrname(StringUtils.uncapitalize(attrName));
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//列的数据类型，转换成Java类型
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String attrType = config.getString(sysColumn.getDataType(), "unknowType");
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sysColumn.setAttrType(attrType);
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//是否主键
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// if("PRI".equalsIgnoreCase(column.get("columnKey")) && sysTable.getPk() == null){
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// sysTable.setPk(sysColumn);
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// }
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if(column.get("columnName").equalsIgnoreCase(table.get("keyColumnName")) && sysTable.getPk() == null){
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sysTable.setPk(sysColumn);
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}
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columsList.add(sysColumn);
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}
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sysTable.setColumns(columsList);
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//没主键，则第一个字段为主键
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if(sysTable.getPk() == null){
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sysTable.setPk(sysTable.getColumns().get(0));
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}
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//设置velocity资源加载器
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Properties prop = new Properties();
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prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
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Velocity.init(prop);
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String entityPrefix=config.getString("entityPrefix");
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String classNameTemp=entityPrefix+sysTable.getClassName();
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String classnameTmep=sysTable.getClassname();
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String pathPrefix=config.getString("pathPrefix");
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//封装模板数据
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Map<String, Object> map = new HashMap<>();
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map.put("tableName", sysTable.getTableName());
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map.put("comments", sysTable.getComments());
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map.put("pk", sysTable.getPk());
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map.put("className", classNameTemp);
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map.put("classname", classnameTmep);
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map.put("pathPrefix", pathPrefix);
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map.put("pathName", "/"+ sysTable.getClassname().toLowerCase()); //REST服务路径，全小写： ${pathPrefix}${pathName}/list
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map.put("columns", sysTable.getColumns());
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map.put("package", config.getString("package"));
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map.put("author", config.getString("author"));
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map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
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VelocityContext context = new VelocityContext(map);
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//获取模板列表
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List<String> templates = getTemplates();
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for(String template : templates){
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//渲染模板
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StringWriter sw = new StringWriter();
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Template tpl = Velocity.getTemplate(template, "UTF-8");
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tpl.merge(context, sw);
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try {
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//添加到zip
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zip.putNextEntry(new ZipEntry(getFileName(template, classNameTemp, classnameTmep, pathPrefix, config.getString("package"))));
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IOUtils.write(sw.toString(), zip, "UTF-8");
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IOUtils.closeQuietly(sw);
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zip.closeEntry();
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} catch (IOException e) {
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throw new LanbaseException("渲染模板失败，表名：" + sysTable.getTableName(), e);
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}
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}
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}
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/**
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* 列名转换成Java属性名
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*/
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public static String columnToJava(String columnName) {
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return WordUtils.capitalizeFully(columnName, new char[]{'_'}).replace("_", "");
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}
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/**
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* 表名转换成Java类名
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*/
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public static String tableToJava(String tableName, String tablePrefix) {
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if(StringUtils.isNotBlank(tablePrefix)){
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tableName = tableName.replace(tablePrefix, "");
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tableName = tableName.replace(tablePrefix.toLowerCase(), "");
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tableName = tableName.replace(tablePrefix.toUpperCase(), "");
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}
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return columnToJava(tableName);
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}
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/**
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* 获取配置信息
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*/
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public static Configuration getConfig(){
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try {
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return new PropertiesConfiguration("generator.properties");
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} catch (ConfigurationException e) {
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throw new LanbaseException("获取配置文件失败，", e);
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}
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}
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/**
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* 获取文件名
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*/
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public static String getFileName(String template, String className, String classname, String pathPrefix, String packageName){
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String packagePath = "main" + File.separator + "java" + File.separator;
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if(StringUtils.isNotBlank(packageName)){
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packagePath += packageName.replace(".", File.separator) + File.separator;
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}
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if(template.contains("Entity.java.vm")){
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return packagePath + "entity" + File.separator + className + ".java";
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}
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if(template.contains("Dao.java.vm")){
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return packagePath + "dao" + File.separator + className + "Dao.java";
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}
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if(template.contains("Service.java.vm")){
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return packagePath + "service" + File.separator + className + "Service.java";
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}
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if(template.contains("ServiceImpl.java.vm")){
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return packagePath + "service" + File.separator + "impl" + File.separator + className + "ServiceImpl.java";
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}
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if(template.contains("Controller.java.vm")){
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return packagePath + "controller" + File.separator + className + "Controller.java";
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}
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if(template.contains("Dao.xml.vm")){
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return "main" + File.separator + "resources" + File.separator + "mapper" + File.separator + pathPrefix + File.separator + className + "Dao.xml";
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}
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if(template.contains("list.html.vm")){
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return "main" + File.separator + "resources" + File.separator + "views" + File.separator
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+ "modules" + File.separator + pathPrefix + File.separator + classname + ".html";
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}
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if(template.contains("list.js.vm")){
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return "main" + File.separator + "resources" + File.separator + "static" + File.separator + "js" + File.separator
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+ "modules" + File.separator + pathPrefix + File.separator + classname + ".js";
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}
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return null;
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}
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}
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