94 lines
3.1 KiB
Rust
94 lines
3.1 KiB
Rust
use crate::{
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compilation::{compile_validators, context::CompilationContext, JSONSchema},
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error::{error, no_error, CompilationError, ErrorIterator, ValidationError},
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keywords::{format_vec_of_validators, CompilationResult, Validators},
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validator::Validate,
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};
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use serde_json::{Map, Value};
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pub(crate) struct OneOfValidator {
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schemas: Vec<Validators>,
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}
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impl OneOfValidator {
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#[inline]
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pub(crate) fn compile(schema: &Value, context: &CompilationContext) -> CompilationResult {
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if let Value::Array(items) = schema {
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let mut schemas = Vec::with_capacity(items.len());
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for item in items {
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schemas.push(compile_validators(item, context)?)
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}
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Ok(Box::new(OneOfValidator { schemas }))
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} else {
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Err(CompilationError::SchemaError)
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}
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}
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fn get_first_valid(&self, schema: &JSONSchema, instance: &Value) -> Option<usize> {
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let mut first_valid_idx = None;
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for (idx, validators) in self.schemas.iter().enumerate() {
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if validators
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.iter()
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.all(|validator| validator.is_valid(schema, instance))
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{
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first_valid_idx = Some(idx);
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break;
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}
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}
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first_valid_idx
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}
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#[allow(clippy::integer_arithmetic)]
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fn are_others_valid(&self, schema: &JSONSchema, instance: &Value, idx: usize) -> bool {
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// `idx + 1` will not overflow, because the maximum possible value there is `usize::MAX - 1`
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// For example we have `usize::MAX` schemas and only the last one is valid, then
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// in `get_first_valid` we enumerate from `0`, and on the last index will be `usize::MAX - 1`
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for validators in self.schemas.iter().skip(idx + 1) {
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if validators
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.iter()
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.all(|validator| validator.is_valid(schema, instance))
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{
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return true;
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}
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}
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false
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}
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}
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impl Validate for OneOfValidator {
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fn is_valid(&self, schema: &JSONSchema, instance: &Value) -> bool {
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let first_valid_idx = self.get_first_valid(schema, instance);
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if let Some(idx) = first_valid_idx {
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!self.are_others_valid(schema, instance, idx)
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} else {
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false
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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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let first_valid_idx = self.get_first_valid(schema, instance);
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if let Some(idx) = first_valid_idx {
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if self.are_others_valid(schema, instance, idx) {
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return error(ValidationError::one_of_multiple_valid(instance));
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}
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no_error()
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} else {
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error(ValidationError::one_of_not_valid(instance))
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}
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}
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}
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impl ToString for OneOfValidator {
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fn to_string(&self) -> String {
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format!("oneOf: [{}]", format_vec_of_validators(&self.schemas))
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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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_: &Map<String, Value>,
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schema: &Value,
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context: &CompilationContext,
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) -> Option<CompilationResult> {
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Some(OneOfValidator::compile(schema, context))
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}
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