lance is a library to generate code from code.
Let's see how we can generate code by using lance
Here is a json file which is fed to lance library to generate java code
{
"fqcn": "com.susamn.MetaClass",
"type": "CLASS"
}generates java code as:
package com.susamn;
public class MetaClass {
}- fqcn is Fully Qualified Class Name
Seems pretty easy right. Let's see some involved code generation which is usable. Here is the json file for that:
{
"generate_path": "",
"classes":[
{
"fqcn": "com.susamn.Meta",
"type": "CLASS",
"extends": {
"fqcn": "com.susamn.Parent",
"generic_types": ["java.lang.Integer"]
},
"implements": [
{
"fqcn": "java.io.Serializable",
"generic_types": ["java.lang.Integer"]
},
{
"fqcn": "org.apache.Logger",
"generic_types": ["com.susamn.Root","java.lang.String"]
}
],
"annotations": [
{
"fqcn": "com.susamn.ClassLevelAnnotation1"
},
{
"fqcn": "com.susamn.ClassLevelAnnotation2",
"data": {
"key1": {
"type": "INTEGER",
"value": 23
}
}
}
],
"attributes": [
{
"name": "logger",
"mode": "public",
"type": {
"of": "CLASS",
"fqcn": "org.slf4j.api.Logger"
},
"accessors": true,
"initialized_form": {
"form": "LoggerFactory.getLogger(RiskAssessmentController.class)",
"imports": ["org.apache.logger.api.LoggerFactory","com.susamn.RiskAssessmentController"]
}
},
{
"name": "foo",
"mode": "private",
"type": {
"of": "STRING"
},
"accessors": true,
"initialized_form": {
"form": "\"Foo_Value\"",
"imports": []
},
"annotation_level": "GETTER_ANNOTATION",
"annotations": [
{
"fqcn": "com.susamn.Annotation1",
"data": {
"key1": {
"type": "INTEGER",
"value": 23
}
}
},
{
"fqcn": "com.susamn.Annotation2",
"data": {
"key1": {
"type": "STRING",
"value": "String data"
}
}
}
]
},
{
"name": "foobar",
"mode": "private",
"type": {
"of": "STRING"
},
"accessors": true,
"annotations": [
{
"fqcn": "com.susamn.Annotation3"
},
{
"fqcn": "com.susamn.Annotation4",
"data": {
"key1": {
"type": "INTEGER",
"value": 23
}
}
}
]
},
{
"name": "bar",
"mode": "private",
"type": {
"of": "LIST_STRING"
},
"accessors": true
},
{
"name": "far",
"mode": "private",
"type": {
"of":"LIST_INTEGER"
},
"accessors": true
},
{
"name": "boo",
"mode": "private",
"type": {
"of":"LIST_CLASS",
"fqcn": "com.susamn.Custom"
},
"accessors": true
},
{
"name": "doo",
"mode": "private",
"type": {
"of":"INTEGER"
},
"accessors": true
},
{
"name": "dar",
"mode": "private",
"type": {
"of":"FLOAT"
}
}
],
"methods": [
{
"name": "processRequest",
"mode": "public",
"type": {
"of": "STRING"
},
"inputs": [
{
"name": "body",
"type": {
"of": "STRING",
"annotations": [
{
"fqcn": "com.susamn.ResponseBody"
}
]
}
},
{
"name": "clazz",
"type": {
"of":"LIST_CLASS",
"fqcn": "com.susamn.Custom2"
}
},
{
"type": {
"of": "CLASS",
"fqcn": "org.springframework.web.mvc.HttpEntity",
"generic_types": ["java.lang.String"]
}
}
],
"annotations": [
{
"fqcn": "com.susamn.Annotation11",
"data": {
"key1": {
"type": "INTEGER",
"value": 78.10
}
}
},
{
"fqcn": "com.susamn.Annotation10",
"data": {
"key1": {
"type": "INTEGER",
"value": 12.19
}
}
}
]
},
{
"name": "syncRequest",
"mode": "public",
"type": {
"of": "CLASS",
"fqcn": "org.springframework.web.mvc.HttpEntity",
"generic_types": ["GENERIC"]
},
"inputs": [
{
"name": "value",
"type": {
"of": "STRING",
"annotations": [
{
"fqcn": "com.susamn.ResponseBody"
}
]
}
}
]
},
{
"name": "deleteRequest",
"mode": "public",
"type": {
"of": "CLASS",
"fqcn": "org.springframework.web.mvc.HttpEntity",
"generic_types": ["java.lang.Boolean"]
},
"inputs": [
{
"type": {
"of": "STRING",
"annotations": [
{
"fqcn": "com.susamn.ResponseBody"
}
]
}
}
],
"body": {
"form": ["Map<Integer,RiskAssessment> map = new HashMap<>();", "map.put(1, new RiskAssessment());"],
"imports": ["java.util.Map","java.util.HashMap","com.susamn.RiskAssessment"]
}
}
]
}
]
}this generates java code:
package com.susamn;
import com.susamn.Annotation1;
import com.susamn.Annotation10;
import com.susamn.Annotation11;
import com.susamn.Annotation2;
import com.susamn.Annotation3;
import com.susamn.Annotation4;
import com.susamn.ClassLevelAnnotation1;
import com.susamn.ClassLevelAnnotation2;
import com.susamn.Custom;
import com.susamn.Custom2;
import com.susamn.Parent;
import com.susamn.ResponseBody;
import com.susamn.RiskAssessment;
import com.susamn.RiskAssessmentController;
import com.susamn.Root;
import java.io.Serializable;
import java.lang.Boolean;
import java.lang.Integer;
import java.lang.String;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.Logger;
import org.apache.logger.api.LoggerFactory;
import org.slf4j.api.Logger;
import org.springframework.web.mvc.HttpEntity;
@ClassLevelAnnotation1
@ClassLevelAnnotation2(key1 = 23)
public class Meta extends Parent<Integer> implements Serializable<Integer>, Logger<Root,String> {
public Logger logger = LoggerFactory.getLogger(RiskAssessmentController.class);
private List<String> bar;
private List<Integer> far;
private List<Custom> boo;
private int doo;
private float dar;
@Annotation1(key1 = 23)
@Annotation2(key1 = "String data")
private String foo = "Foo_Value";
@Annotation3
@Annotation4(key1 = 23)
private String foobar;
public Logger getLogger(){
return this.logger;
}
public void setLogger(Logger logger){
this.logger = logger;
}
public String getFoo(){
return this.foo;
}
public void setFoo(String foo){
this.foo = foo;
}
public String getFoobar(){
return this.foobar;
}
public void setFoobar(String foobar){
this.foobar = foobar;
}
public List<String> getBar(){
return this.bar;
}
public void setBar(List<String> bar){
this.bar = bar;
}
public List<Integer> getFar(){
return this.far;
}
public void setFar(List<Integer> far){
this.far = far;
}
public List<Custom> getBoo(){
return this.boo;
}
public void setBoo(List<Custom> boo){
this.boo = boo;
}
public int getDoo(){
return this.doo;
}
public void setDoo(int doo){
this.doo = doo;
}
@Annotation11(key1 = 78.1)
@Annotation10(key1 = 12.19)
public String processRequest(@ResponseBody String body, List<Custom2> clazz, HttpEntity<String> val0){
}
public HttpEntity<?> syncRequest(@ResponseBody String value){
}
public HttpEntity<Boolean> deleteRequest(@ResponseBody String val0){
Map<Integer,RiskAssessment> map = new HashMap<>();
map.put(1, new RiskAssessment());
}
}