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Support for Java records #313
Description
Java 14 introduced the record keyword, which allows the creation of a lightweight "class" which really only holds data, similar to a struct in C for example. StringTemplate does not support records because the way records define fields/method is different.
Say I have a record Person (with the equivalent class after it) defined as
/*
* Lightweight Person record, only one line.
*/
public record Person(String name, int age) {
// Nothing inside
}
/*
* This class is equivalent to the record above, but much more code needs to be written.
*/
public class Person {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String name() {
return this.name;
}
public int age() {
return this.age;
}
}The record will have two methods, name(), and age(), for getting the name and age fields.
Person person = new Person("John Doe", 30);
assert "John Doe".equals(person.name()) && person.age() == 30;Related to #302, the fields of a record are private, and the methods do not follow StringTemplate's findMember method search pattern of getField, isField, and hasField:
// try getXXX and isXXX properties, look up using reflection
String methodSuffix = Character.toUpperCase(memberName.charAt(0)) +
memberName.substring(1, memberName.length());
member = tryGetMethod(clazz, "get" + methodSuffix);
if (member == null) {
member = tryGetMethod(clazz, "is" + methodSuffix);
if (member == null) {
member = tryGetMethod(clazz, "has" + methodSuffix);
}
}
if (member == null) {
// try for a visible field
member = tryGetField(clazz, memberName);
}The addition of a tryGetMethod(clazz, memberName) would solve this because the methods of a record are public. Or, fix the issue of #302, but doing this would help as well.
Activity
vorburger commentedon Dec 10, 2023
https://github.com/antlr/stringtemplate4/blob/master/doc/adaptors.md may be useful for you? Best of luck.
starksm64 commentedon Jun 27, 2024
Here is a generic adaptor for records that I have used.