SchemaConstraint.php

<?php


/*
 * This file is part of the JsonSchema package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace JsonSchema\Constraints;

use JsonSchema\Entity\JsonPointer;
use JsonSchema\Exception\InvalidArgumentException;
use JsonSchema\Exception\InvalidSchemaException;
use JsonSchema\Exception\RuntimeException;
use JsonSchema\Validator;

/**
 * The SchemaConstraint Constraints, validates an element against a given schema
 *
 * @author Robert Schönthal <seroscho@googlemail.com>
 * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
 */
class SchemaConstraint extends Constraint {
    const DEFAULT_SCHEMA_SPEC = 'http://json-schema.org/draft-04/schema#';
    
    /**
     * {@inheritdoc}
     */
    public function check(&$element, $schema = null, ?JsonPointer $path = null, $i = null) {
        if ($schema !== null) {
            // passed schema
            $validationSchema = $schema;
        }
        elseif ($this->getTypeCheck()
            ->propertyExists($element, $this->inlineSchemaProperty)) {
            // inline schema
            $validationSchema = $this->getTypeCheck()
                ->propertyGet($element, $this->inlineSchemaProperty);
        }
        else {
            throw new InvalidArgumentException('no schema found to verify against');
        }
        // cast array schemas to object
        if (is_array($validationSchema)) {
            $validationSchema = BaseConstraint::arrayToObjectRecursive($validationSchema);
        }
        // validate schema against whatever is defined in $validationSchema->$schema. If no
        // schema is defined, assume self::DEFAULT_SCHEMA_SPEC (currently draft-04).
        if ($this->factory
            ->getConfig(self::CHECK_MODE_VALIDATE_SCHEMA)) {
            if (!$this->getTypeCheck()
                ->isObject($validationSchema)) {
                throw new RuntimeException('Cannot validate the schema of a non-object');
            }
            if ($this->getTypeCheck()
                ->propertyExists($validationSchema, '$schema')) {
                $schemaSpec = $this->getTypeCheck()
                    ->propertyGet($validationSchema, '$schema');
            }
            else {
                $schemaSpec = self::DEFAULT_SCHEMA_SPEC;
            }
            // get the spec schema
            $schemaStorage = $this->factory
                ->getSchemaStorage();
            if (!$this->getTypeCheck()
                ->isObject($schemaSpec)) {
                $schemaSpec = $schemaStorage->getSchema($schemaSpec);
            }
            // save error count, config & subtract CHECK_MODE_VALIDATE_SCHEMA
            $initialErrorCount = $this->numErrors();
            $initialConfig = $this->factory
                ->getConfig();
            $initialContext = $this->factory
                ->getErrorContext();
            $this->factory
                ->removeConfig(self::CHECK_MODE_VALIDATE_SCHEMA | self::CHECK_MODE_APPLY_DEFAULTS);
            $this->factory
                ->addConfig(self::CHECK_MODE_TYPE_CAST);
            $this->factory
                ->setErrorContext(Validator::ERROR_SCHEMA_VALIDATION);
            // validate schema
            try {
                $this->check($validationSchema, $schemaSpec);
            } catch (\Exception $e) {
                if ($this->factory
                    ->getConfig(self::CHECK_MODE_EXCEPTIONS)) {
                    throw new InvalidSchemaException('Schema did not pass validation', 0, $e);
                }
            }
            if ($this->numErrors() > $initialErrorCount) {
                $this->addError($path, 'Schema is not valid', 'schema');
            }
            // restore the initial config
            $this->factory
                ->setConfig($initialConfig);
            $this->factory
                ->setErrorContext($initialContext);
        }
        // validate element against $validationSchema
        $this->checkUndefined($element, $validationSchema, $path, $i);
    }

}