97 lines
3.1 KiB
Rust
97 lines
3.1 KiB
Rust
use crate::{
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compilation::{compile_validators, context::CompilationContext, JSONSchema},
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error::{error, ErrorIterator, ValidationError},
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keywords::{CompilationResult, Validators},
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validator::Validate,
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};
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use parking_lot::RwLock;
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use serde_json::Value;
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use std::borrow::Cow;
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use url::Url;
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pub(crate) struct RefValidator {
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reference: Url,
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/// Precomputed validators.
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/// They are behind a RwLock as is not possible to compute them
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/// at compile time without risking infinite loops of references
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/// and at the same time during validation we iterate over shared
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/// references (&self) and not owned references (&mut self).
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validators: RwLock<Option<Validators>>,
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}
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impl RefValidator {
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#[inline]
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pub(crate) fn compile(reference: &str, context: &CompilationContext) -> CompilationResult {
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let reference = context.build_url(reference)?;
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Ok(Box::new(RefValidator {
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reference,
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validators: RwLock::new(None),
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}))
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}
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/// Ensure that validators are built and built once.
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#[inline]
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fn ensure_validators<'a>(&self, schema: &'a JSONSchema) -> Result<(), ValidationError<'a>> {
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if self.validators.read().is_none() {
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let (scope, resolved) = schema.resolver.resolve_fragment(
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schema.context.config.draft(),
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&self.reference,
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schema.schema,
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)?;
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let context = CompilationContext::new(scope, Cow::Borrowed(&schema.context.config));
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let validators = compile_validators(&resolved, &context)?;
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// Inject the validators into self.validators
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*self.validators.write() = Some(validators);
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}
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Ok(())
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}
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}
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impl Validate for RefValidator {
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fn is_valid(&self, schema: &JSONSchema, instance: &Value) -> bool {
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if self.ensure_validators(schema).is_err() {
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false
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} else {
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self.validators
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.read()
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.as_ref()
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.expect("ensure_validators guarantees the presence of the validators")
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.iter()
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.all(move |validator| validator.is_valid(schema, instance))
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}
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}
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fn validate<'a>(&self, schema: &'a JSONSchema, instance: &'a Value) -> ErrorIterator<'a> {
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if let Err(err) = self.ensure_validators(schema) {
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error(err)
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} else {
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Box::new(
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self.validators
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.read()
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.as_ref()
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.expect("ensure_validators guarantees the presence of the validators")
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.iter()
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.flat_map(move |validator| validator.validate(schema, instance))
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.collect::<Vec<_>>()
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.into_iter(),
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)
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}
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}
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}
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impl ToString for RefValidator {
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fn to_string(&self) -> String {
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format!("$ref: {}", self.reference)
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}
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}
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#[inline]
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pub(crate) fn compile(
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_: &Value,
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reference: &str,
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context: &CompilationContext,
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) -> Option<CompilationResult> {
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Some(RefValidator::compile(reference, context))
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}
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