2.3. T02 Create a Class

In this tutorial we will create a simple class with MetaFactory.

  • Add the highlighted line to your codeinstruction.xml to use a new pattern.

Listing 2.7 src/patterns/codeinstruction.xml
 1<?xml version="1.0" encoding="UTF-8"?>
 2<code_instruction
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns="https://metafactory.io/xsd/v1/codeinstruction"
 5        xsi:schemaLocation="https://metafactory.io/xsd/v1/codeinstruction https://metafactory.io/xsd/v1/codeinstruction.xsd
 6                            https://metafactory.io/xsd/v1/java-codeinstruction https://metafactory.io/xsd/v1/java-codeinstruction.xsd"
 7        xmlns:typescript="https://metafactory.io/xsd/v1/typescript-codeinstruction"
 8        xmlns:java="https://metafactory.io/xsd/v1/java-codeinstruction"
 9>
10  <properties>
11    <base>com.metafactory.workshop</base>
12    <java.main.directory>src/main/java</java.main.directory>
13    <java.generated.directory>src/main/generated</java.generated.directory>
14    <conf.main.directory>src/main/resources</conf.main.directory>
15    <java.test.directory>src/test/java</java.test.directory>
16    <conf.test.directory>src/test/resources</conf.test.directory>
17    <!-- Frontend properties -->
18    <jhipster.style>4</jhipster.style>
19    <jhipster6104_angular1000_frontend.output.path>./metafactory-workshop-frontend</jhipster6104_angular1000_frontend.output.path>
20    <app.class.name>MetaFactoryWorkshopApplication</app.class.name>
21    <angular.use.angular8.viewchild>true</angular.use.angular8.viewchild>
22    <angular.app.name>Workshop</angular.app.name>
23    <angular.app.title>MetaFactory Workshop</angular.app.title>
24    <webapp.app.directory>/app</webapp.app.directory>
25    <webapp.main.directory>${project.property.webapp.main.directory}</webapp.main.directory>
26    <angular.library.output.path>./metafactory-workshop-frontend</angular.library.output.path>
27    <angular.webapp.main.directory>src/main/webapp</angular.webapp.main.directory>
28    <angular.webapp.root>src/main/webapp/app</angular.webapp.root>
29    <webapp.components.selector>shc</webapp.components.selector>
30    <app.showNotifications>true</app.showNotifications>
31    <!-- Backend properties -->
32    <jhipster6104_angular1000_backend.output.path>./metafactory-workshop-backend</jhipster6104_angular1000_backend.output.path>
33
34  </properties>
35
36  <!-- Load Freemarker template files -->
37  <freemarker>
38    <freemarker_library namespace="naming">/library/naming.ftl</freemarker_library>
39    <freemarker_library namespace="util">/jhipster/util/util.ftl</freemarker_library>
40    <freemarker_library namespace="state_util">/jhipster/util/state-utils.ftl</freemarker_library>
41    <freemarker_library namespace="model_util">/library/model_utils.ftl</freemarker_library>
42    <freemarker_library namespace="tl">/library/layout/tableLayout.ftl</freemarker_library>
43    <freemarker_library namespace="metadata">/library/metadata.ftl</freemarker_library>
44  </freemarker>
45
46  <external_libraries>
47    <external_library name="libMF">
48      <path>./</path>
49      <patterns_folder>src/patterns</patterns_folder>
50      <snippets_folder>src/snippets</snippets_folder>
51      <function_library>src/patterns/package/pattern-functions.xml</function_library>
52    </external_library>
53  </external_libraries>
54
55  <features>
56
57  </features>
58
59  <!--#############################################################################################################-->
60  <!--############################################### Java patterns ###############################################-->
61  <!--#############################################################################################################-->
62
63  <!-- The new MetaFactory Runtime Model => A pojo representation of your model.xml which can be used from your snippets-->
64  <java:external_java_package id="libMF/package/model/runtime/model-root.xml" />
65  <java:external_java_package id="libMF/package/model/runtime/model-pojo.xml" />
66
67  <!-- your codeinstructions here -->
68  <java:external_java_package id="libMF/package/feature1/java_package1.xml" />
69
70</code_instruction>

  • Create a new file called pattern1.xml in a new directory metafactory-workshop-metafactory\src\patterns\package\feature1 and place the following content in it:

Listing 2.8 src/patterns/package/feature1/java_package1.xml
 1<java_package
 2         xmlns="https://metafactory.io/xsd/v1/java-codeinstruction"
 3         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4         xsi:schemaLocation="https://metafactory.io/xsd/v1/java-codeinstruction
 5                            https://metafactory.io/xsd/v1/java-codeinstruction.xsd"
 6         name="com.company.workshop"
 7         path="src/main/java">
 8  <class name="MyClass">
 9  </class>
10</java_package>

Now:

  • Click on metafactory-workshop-metafactory in the MetaFactory Project window.

  • Click on the Play button to run the Code Composer.

Once finished the Code Composer will have generated the Java class MyClass.

  • Open metafactory-workshop-backend\src\main\java\com\company\workshop\MyClass.java to see the result.