mkdir myApp && cd myApp
jhipster

? Which *type* of application would you like to create? Monolithic application (recommended for simple projects)
? What is the base name of your application? myApp
? Do you want to make it reactive with Spring WebFlux? No
? What is your default Java package name? com.mycompany.myapp
? Which *type* of authentication would you like to use? JWT authentication (stateless, with a token)
? Which *type* of database would you like to use? SQL (H2, PostgreSQL, MySQL, MariaDB, Oracle, MSSQL)
? Which *production* database would you like to use? PostgreSQL
? Which *development* database would you like to use? H2 with disk-based persistence
? Which cache do you want to use? (Spring cache abstraction) No cache - Warning, when using an SQL database, this will disable the Hibernate 2nd level cache!
? Would you like to use Maven or Gradle for building the backend? Gradle
? Do you want to use the JHipster Registry to configure, monitor and scale your application? No
? Which other technologies would you like to use? 
? Which *Framework* would you like to use for the client? React
? Do you want to generate the admin UI? Yes
? Would you like to use a Bootswatch theme (https://bootswatch.com/)? Default JHipster
? Would you like to enable internationalization support? Yes
? Please choose the native language of the application English
? Please choose additional languages to install 
? Besides JUnit and Jest, which testing frameworks would you like to use? 
? Would you like to install other generators from the JHipster Marketplace? No

entity Employee {
    FirstName       String,
    LastName        String,
    Email           String,
    PhoneNumber     String,
    HireDate        LocalDate,
    Salary          Long,
    CommisionPct    Long,
}

jhipster jdl jhipster-jdl.jdl --force

npm install -g generator-jhipster-ionic
jhipster --blueprint ionic --skip-checks --force

jhipster entities --regenerate --force

./gradlew

cd ../ionic4j/
npm install
npm start

mkdir my-blueprint; cd my-blueprint
jhipster generate-blueprint

? What is the base name of your application? my-blueprint
? What is the project name of your application? My Blueprint Application

? Do you want to generate a local blueprint inside your application? No

? Which sub-generators do you want to override? entity-client, entity-server, server
? Comma separated additional sub-generators. 

? Add a cli? Yes

? Is entity-client generator a side-by-side blueprint? Yes

? Is entity-client generator a cli command? No

? What task do you want do implement at entity-client generator? writing, postWriting

? What is the default indentation? 2

⬢ Welcome to the JHipster Project Name ⬢
? What is the base name of your application? my-blueprint
? What is the project name of your application? My Blueprint Application
? Do you want to generate a local blueprint inside your application? No
? Which sub-generators do you want to override? entity-client, entity-server, server
? Comma separated additional sub-generators. 
? Add a cli? Yes
? Is entity-client generator a side-by-side blueprint? Yes
? Is entity-client generator a cli command? No
? What task do you want do implement at entity-client generator? writing, postWriting
? Is entity-server generator a side-by-side blueprint? Yes
? Is entity-server generator a cli command? No
? What task do you want do implement at entity-server generator? writing, postWriting
? Is server generator a side-by-side blueprint? Yes
? Is server generator a cli command? No
? What task do you want do implement at server generator? writing, postWriting
? What is the default indentation? 2

npm install
sudo npm link

get [POST_WRITING_PRIORITY]() {
  return {
    async postWritingTemplateTask() {
      this.addGradleMavenRepository('https://jaspersoft.jfrog.io/jaspersoft/third-party-ce-artifacts/');
      this.addGradleDependency('implementation', 'net.sf.jasperreports', 'jasperreports:6.20.0');
    },
  };
}

get [POST_WRITING_PRIORITY]() {
  return {
    async postWritingTemplateTask() {
      const primaryKeyName = this.entity.primaryKey.name;
      const entityInstance = this.entity.entityInstance;
      const entityApiUrl = this.entity.entityApiUrl;
      const entityFolderName = this.entity.entityFolderName;
      const entityFileName = this.entity.entityFileName;
      this.editFile(
        `src/main/webapp/app/entities/` + entityFolderName + `/` + entityFileName + `.reducer.ts`,
        content => content.replace(
                  `// slice`,
                  `export const downloadEntitiesPdf = createAsyncThunk(
                    '${entityInstance}/fetch_entity_pdf',
                    async (id? : number) => {
                      return await axios.get(\`\${apiUrl}/report/\${id ? id : ''}\`, { responseType: 'blob' }).then(response => {
                        const link = document.createElement('a');
                        link.href = URL.createObjectURL(new Blob([response.data]));
                        link.download = "${entityApiUrl}.pdf";
                        link.click();
                        URL.revokeObjectURL(link.href);
                      })
                    },
                    { serializeError: serializeAxiosError }
                  );
                  // slice`),
      );
      this.editFile(
        `src/main/webapp/app/entities/` + entityFolderName + `/` + entityFileName + `.tsx`,
        content => content.replace(
                  `getEntities,`,
                  `getEntities, downloadEntitiesPdf`),
        content => content.replace(
                  `const handleSyncList = () => {`,
                  `const handleDownloadPdf = (${primaryKeyName}?: number) => { dispatch(downloadEntitiesPdf(${primaryKeyName})); };
                    const handleSyncList = () => {`),
        content => content.replace(
                  `<div className="btn-group flex-btn-group-container">`,
                  `<div className="btn-group flex-btn-group-container">
                  <Button color="warning" size="sm" data-cy="entityReportsButton" onClick={() => void handleDownloadPdf(${entityInstance}.${primaryKeyName})}>
                  <FontAwesomeIcon icon="save" /> <span className="d-none d-md-inline" >PDF</span>
                  </Button>`)
      );
    },
  };
}

package <%= entityAbsolutePackage %>.web.rest.report;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.web.bind.annotation.*;
import org.springframework.http.ResponseEntity;
    
import <%= entityAbsolutePackage %>.domain.<%= entityClass %>;
import <%= entityAbsolutePackage %>.repository.<%= entityClass %>Repository;
import <%= entityAbsolutePackage %>.web.rest.errors.BadRequestAlertException;

@RestController
@RequestMapping("/api")
public class Report<%= entityClass %>Resource {

    private static final String ENTITY_NAME = "<%= entityInstance %>";

    @Value("${jhipster.clientApp.name}")
    private String applicationName;

    private final <%= entityClass %>Repository <%= entityInstance %>Repository;

    public Report<%= entityClass %>Resource(<%= entityClass %>Repository <%= entityInstance %>Repository ) {
        this.<%= entityInstance %>Repository = <%= entityInstance %>Repository;
    }

    private byte[] exportReportToPdf(Resource resource, Map<String, Object> parameters, List<?> fields)
            throws IOException, JRException {
        try (InputStream in = resource.getInputStream();) {
            return JasperExportManager.exportReportToPdf(
                JasperFillManager.fillReport(JasperCompileManager.compileReport(in), parameters, new JRBeanCollectionDataSource(fields))
            );
        }
    }
    
    @GetMapping("/<%= entityApiUrl %>/report/{id}")
    public ResponseEntity<byte[]> get<%= entityClass %>(@PathVariable <%= primaryKey.type %> id) throws IOException, JRException {
        Optional<<%= entityClass %>> <%= entityInstance %> = <%= entityInstance %>Repository.findById(id);
        if (<%= entityInstance %>.isEmpty()) {
            throw new BadRequestAlertException("Entity not found", ENTITY_NAME, "idnotfound");
        }
        Resource resource = new ClassPathResource("./reports/report_<%= entityClass %>.jrxml");
        byte[] bytes = exportReportToPdf(resource, new HashMap<String, Object>(), Arrays.asList(<%= entityInstance %>.get()));
        return ResponseEntity.ok().body(bytes);
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="emproyee" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="e666857c-a4c1-4758-9020-f97c81327097">
	<queryString>
	</queryString>
<%_ for (const field of fields) {
	const fieldName = field.fieldName; _%>
	<%_ if (field.fieldTypeUUID) { _%>
	<field name="<%= fieldName %>" class="java.util.UUID"/>
	<%_ } else if (field.fieldTypeLong) { _%>
	<field name="<%= fieldName %>" class="java.lang.Long"/>
	<%_ } else if (field.fieldTypeInteger) { _%>
	<field name="<%= fieldName %>" class="java.lang.Integer"/>
	<%_ } else if (field.fieldTypeFloat) { _%>
	<field name="<%= fieldName %>" class="java.lang.Float"/>
	<%_ } else if (field.fieldTypeDouble) { _%>
	<field name="<%= fieldName %>" class="java.lang.Double"/>
	<%_ } else if (field.fieldTypeBigDecimal) { _%>
	<field name="<%= fieldName %>" class="java.math.BigDecimal"/>
	<%_ } else if (field.fieldTypeLocalDate) { _%>
	<field name="<%= fieldName %>" class="java.time.LocalDate"/>    
	<%_ } else if (field.fieldTypeInstant) { _%>
	<field name="<%= fieldName %>" class="java.time.Instant"/>
	<%_ } else if (field.fieldTypeDuration) { _%>
	<field name="<%= fieldName %>" class="java.time.Duration"/>    
	<%_ } else if (field.fieldTypeZonedDateTime) { _%>
	<field name="<%= fieldName %>" class="java.time.ZonedDateTime"/>    
	<%_ } else if (field.fieldTypeBoolean) { _%>
	<field name="<%= fieldName %>" class="java.lang.Boolean"/>
	<%_ } else if (field.fieldTypeString) { _%>
	<field name="<%= fieldName %>" class="java.lang.String"/>
	<%_ } else if (field.fieldIsEnum) { _%>
	<field name="<%= fieldName %>" class="<%= entityAbsolutePackage %>.domain.enumeration.<%= field.javaFieldType %>"/>
	<%_ } _%>
<%_ } _%>
	<pageHeader>
		<band height="30">
		<staticText>
			<reportElement x="0" y="0" width="550" height="30"/>
			<textElement textAlignment="Center" verticalAlignment="Middle">
				<font size="20"/>
			</textElement>
			<text><%= entityClass %></text>
		</staticText>
		</band>
	</pageHeader>
	<detail>
		<band height="750" splitType="Stretch">
<%_ var counter = 0; 
	var height = Math.min( Math.floor( 750 / fields.length ), 60 ); _%>
<%_ for (const field of fields) {
	const fieldName = field.fieldName; _%>
		<textField textAdjust="ScaleFont">
			<reportElement x="0" y="<%= counter * height %>" width="200" height="<%= height %>"/>
			<box>
				<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
				<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
				<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
				<rightPen lineWidth="2.0" lineStyle="Double" lineColor="#000000"/>
			</box>
			<textElement textAlignment="Center" verticalAlignment="Middle">
				<font size="16"/>
			</textElement>
			<textFieldExpression><![CDATA["<%= fieldName %>"]]></textFieldExpression>
		</textField>
		<textField textAdjust="ScaleFont" isBlankWhenNull="true">
			<reportElement x="200" y="<%= counter * height %>" width="350" height="<%= height %>"/>
			<box>
				<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
				<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
				<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
			</box>
			<textElement textAlignment="Left" verticalAlignment="Middle">
				<font size="14"/>
			</textElement>
			<textFieldExpression><![CDATA[$F{<%= fieldName %>}]]></textFieldExpression>
		</textField>
	<% counter++; %>
<%_ } _%>  
		</band>
	</detail>
</jasperReport>

import { constants } from 'generator-jhipster';
const { SERVER_MAIN_SRC_DIR, SERVER_MAIN_RES_DIR } = constants;

get [WRITING_PRIORITY]() {
  return {
    async writingTemplateTask() {
      await this.writeFiles({
        sections: {
          files: [
            {
              path: SERVER_MAIN_SRC_DIR,
              templates: [
                { file: 'package/web/rest/report/ReportEntityResource.java', renameTo: generator => `${generator.entityAbsoluteFolder}/web/rest/report/Report${generator.entityClass}Resource.java` },
              ],
            },
            {
              path: SERVER_MAIN_RES_DIR,
              templates: [
                { file: 'reports/report_entity.jrxml', renameTo: generator => `reports/report_${generator.entityClass}.jrxml` },
              ],
            },
          ],
        },
        context: this.options.jhipsterContext,
      });
    },
  };
}

cd myApp
jhipster --blueprint my-blueprint --force --skip-checks
npm install /usr/local/lib/node_modules/generator-jhipster-my-blueprint

jhipster entities --regenerate --force

./gradlew

ERROR! Package subpath './lib/util/namespace' is not defined by "exports" in my-blueprint/node_modules/generator-jhipster/node_modules/yeoman-environment/package.json

"./lib/util/namespace": "./lib/util/namespace.js"