lvm_class/attribute/
field.rs

1use crate::attribute::{AttributeKind, SharedAttribute};
2use crate::constant_pool::ConstantPool;
3use crate::error::ClassFormatErr;
4use lvm_common::utils::cursor::ByteCursor;
5
6#[derive(Debug, Clone, PartialEq, Eq)]
7pub enum FieldAttribute {
8    Shared(SharedAttribute),
9    ConstantValue { attr_name_idx: u16, value_idx: u16 },
10}
11
12impl FieldAttribute {
13    pub fn kind(&self) -> AttributeKind {
14        match self {
15            Self::Shared(attr) => attr.kind(),
16            Self::ConstantValue { .. } => AttributeKind::ConstantValue,
17        }
18    }
19}
20
21impl<'a> FieldAttribute {
22    pub(crate) fn read(
23        pool: &ConstantPool,
24        cursor: &mut ByteCursor<'a>,
25    ) -> Result<Self, ClassFormatErr> {
26        let attr_name_idx = cursor.u16()?;
27        let _attribute_length = cursor.u32()? as usize;
28
29        let attribute_kind = AttributeKind::try_from(pool.get_utf8(&attr_name_idx)?)?;
30        match attribute_kind {
31            AttributeKind::ConstantValue => Ok(FieldAttribute::ConstantValue {
32                attr_name_idx,
33                value_idx: cursor.u16()?,
34            }),
35            AttributeKind::RuntimeVisibleAnnotations
36            | AttributeKind::Synthetic
37            | AttributeKind::Deprecated
38            | AttributeKind::Signature => Ok(FieldAttribute::Shared(SharedAttribute::read(
39                attr_name_idx,
40                attribute_kind,
41                cursor,
42            )?)),
43            _ => unimplemented!(),
44        }
45    }
46}
lvm_class/attribute/field.rs

lvm_class/attribute/
field.rs
