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use core::SegmentMeta;
use schema::Schema;
use serde_json;
use std::fmt;
/// Meta information about the `Index`.
///
/// This object is serialized on disk in the `meta.json` file.
/// It keeps information about
/// * the searchable segments,
/// * the index `docstamp`
/// * the schema
///
#[derive(Clone, Serialize, Deserialize)]
pub struct IndexMeta {
pub segments: Vec<SegmentMeta>,
pub schema: Schema,
pub opstamp: u64,
#[serde(skip_serializing_if = "Option::is_none")]
pub payload: Option<String>,
}
impl IndexMeta {
pub fn with_schema(schema: Schema) -> IndexMeta {
IndexMeta {
segments: vec![],
schema,
opstamp: 0u64,
payload: None,
}
}
}
impl fmt::Debug for IndexMeta {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"{}",
serde_json::ser::to_string(self)
.expect("JSON serialization for IndexMeta should never fail.")
)
}
}
#[cfg(test)]
mod tests {
use super::IndexMeta;
use schema::{Schema, TEXT};
use serde_json;
#[test]
fn test_serialize_metas() {
let schema = {
let mut schema_builder = Schema::builder();
schema_builder.add_text_field("text", TEXT);
schema_builder.build()
};
let index_metas = IndexMeta {
segments: Vec::new(),
schema,
opstamp: 0u64,
payload: None,
};
let json = serde_json::ser::to_string(&index_metas).expect("serialization failed");
assert_eq!(json, r#"{"segments":[],"schema":[{"name":"text","type":"text","options":{"indexing":{"record":"position","tokenizer":"default"},"stored":false}}],"opstamp":0}"#);
}
}
|
