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server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/CollectionConstraint.php

@@ -0,0 +1,112 @@
+<?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;
+
+/**
+ * The CollectionConstraint Constraints, validates an array against a given schema
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class CollectionConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($value, $schema = null, $path = null, $i = null)
+    {
+        // Verify minItems
+        if (isset($schema->minItems) && count($value) < $schema->minItems) {
+            $this->addError($path, "There must be a minimum of " . $schema->minItems . " items in the array", 'minItems', array('minItems' => $schema->minItems,));
+        }
+
+        // Verify maxItems
+        if (isset($schema->maxItems) && count($value) > $schema->maxItems) {
+            $this->addError($path, "There must be a maximum of " . $schema->maxItems . " items in the array", 'maxItems', array('maxItems' => $schema->maxItems,));
+        }
+
+        // Verify uniqueItems
+        if (isset($schema->uniqueItems) && $schema->uniqueItems) {
+            $unique = $value;
+            if (is_array($value) && count($value)) {
+                $unique = array_map(function($e) { return var_export($e, true); }, $value);
+            }
+            if (count(array_unique($unique)) != count($value)) {
+                $this->addError($path, "There are no duplicates allowed in the array", 'uniqueItems');
+            }
+        }
+
+        // Verify items
+        if (isset($schema->items)) {
+            $this->validateItems($value, $schema, $path, $i);
+        }
+    }
+
+    /**
+     * Validates the items
+     *
+     * @param array     $value
+     * @param \stdClass $schema
+     * @param string    $path
+     * @param string    $i
+     */
+    protected function validateItems($value, $schema = null, $path = null, $i = null)
+    {
+        if (is_object($schema->items)) {
+            // just one type definition for the whole array
+            foreach ($value as $k => $v) {
+                $initErrors = $this->getErrors();
+
+                // First check if its defined in "items"
+                $this->checkUndefined($v, $schema->items, $path, $k);
+
+                // Recheck with "additionalItems" if the first test fails
+                if (count($initErrors) < count($this->getErrors()) && (isset($schema->additionalItems) && $schema->additionalItems !== false)) {
+                    $secondErrors = $this->getErrors();
+                    $this->checkUndefined($v, $schema->additionalItems, $path, $k);
+                }
+
+                // Reset errors if needed
+                if (isset($secondErrors) && count($secondErrors) < count($this->getErrors())) {
+                    $this->errors = $secondErrors;
+                } else if (isset($secondErrors) && count($secondErrors) === count($this->getErrors())) {
+                    $this->errors = $initErrors;
+                }
+            }
+        } else {
+            // Defined item type definitions
+            foreach ($value as $k => $v) {
+                if (array_key_exists($k, $schema->items)) {
+                    $this->checkUndefined($v, $schema->items[$k], $path, $k);
+                } else {
+                    // Additional items
+                    if (property_exists($schema, 'additionalItems')) {
+                        if ($schema->additionalItems !== false) {
+                            $this->checkUndefined($v, $schema->additionalItems, $path, $k);
+                        } else {
+                            $this->addError(
+                                $path, 'The item ' . $i . '[' . $k . '] is not defined and the definition does not allow additional items', 'additionalItems', array('additionalItems' => $schema->additionalItems,));
+                        }
+                    } else {
+                        // Should be valid against an empty schema
+                        $this->checkUndefined($v, new \stdClass(), $path, $k);
+                    }
+                }
+            }
+
+            // Treat when we have more schema definitions than values, not for empty arrays
+            if(count($value) > 0) {
+                for ($k = count($value); $k < count($schema->items); $k++) {
+                    $this->checkUndefined(new UndefinedConstraint(), $schema->items[$k], $path, $k);
+                }
+            }
+        }
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Constraint.php

@@ -0,0 +1,291 @@
+<?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\Uri\UriRetriever;
+
+/**
+ * The Base Constraints, all Validators should extend this class
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+abstract class Constraint implements ConstraintInterface
+{
+    protected $checkMode = self::CHECK_MODE_NORMAL;
+    protected $uriRetriever;
+    protected $errors = array();
+    protected $inlineSchemaProperty = '$schema';
+
+    const CHECK_MODE_NORMAL = 1;
+    const CHECK_MODE_TYPE_CAST = 2;
+
+    /**
+     * @var null|Factory
+     */
+    private $factory;
+
+    /**
+     * @param int          $checkMode
+     * @param UriRetriever $uriRetriever
+     * @param Factory      $factory
+     */
+    public function __construct($checkMode = self::CHECK_MODE_NORMAL, UriRetriever $uriRetriever = null, Factory $factory = null)
+    {
+        $this->checkMode    = $checkMode;
+        $this->uriRetriever = $uriRetriever;
+        $this->factory = $factory;
+    }
+
+    /**
+     * @return UriRetriever $uriRetriever
+     */
+    public function getUriRetriever()
+    {
+        if (is_null($this->uriRetriever))
+        {
+            $this->setUriRetriever(new UriRetriever);
+        }
+
+        return $this->uriRetriever;
+    }
+
+    /**
+     * @return Factory
+     */
+    public function getFactory()
+    {
+        if (!$this->factory) {
+            $this->factory = new Factory($this->getUriRetriever());
+        }
+
+        return $this->factory;
+    }
+
+    /**
+     * @param UriRetriever $uriRetriever
+     */
+    public function setUriRetriever(UriRetriever $uriRetriever)
+    {
+        $this->uriRetriever = $uriRetriever;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function addError($path, $message, $constraint='', array $more=null)
+    {
+        $error = array(
+            'property' => $path,
+            'message' => $message,
+            'constraint' => $constraint,
+        );
+
+        if (is_array($more) && count($more) > 0)
+        {
+            $error += $more;
+        }
+
+        $this->errors[] = $error;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function addErrors(array $errors)
+    {
+        $this->errors = array_merge($this->errors, $errors);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getErrors()
+    {
+        return $this->errors;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function isValid()
+    {
+        return !$this->getErrors();
+    }
+
+    /**
+     * Clears any reported errors.  Should be used between
+     * multiple validation checks.
+     */
+    public function reset()
+    {
+        $this->errors = array();
+    }
+
+    /**
+     * Bubble down the path
+     *
+     * @param string $path Current path
+     * @param mixed  $i    What to append to the path
+     *
+     * @return string
+     */
+    protected function incrementPath($path, $i)
+    {
+        if ($path !== '') {
+            if (is_int($i)) {
+                $path .= '[' . $i . ']';
+            } elseif ($i == '') {
+                $path .= '';
+            } else {
+                $path .= '.' . $i;
+            }
+        } else {
+            $path = $i;
+        }
+
+        return $path;
+    }
+
+    /**
+     * Validates an array
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkArray($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('collection');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Validates an object
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     * @param mixed $patternProperties
+     */
+    protected function checkObject($value, $schema = null, $path = null, $i = null, $patternProperties = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('object');
+        $validator->check($value, $schema, $path, $i, $patternProperties);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Validates the type of a property
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkType($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('type');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Checks a undefined element
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkUndefined($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('undefined');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Checks a string element
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkString($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('string');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Checks a number element
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkNumber($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('number');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * Checks a enum element
+     *
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    protected function checkEnum($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('enum');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    protected function checkFormat($value, $schema = null, $path = null, $i = null)
+    {
+        $validator = $this->getFactory()->createInstanceFor('format');
+        $validator->check($value, $schema, $path, $i);
+
+        $this->addErrors($validator->getErrors());
+    }
+
+    /**
+     * @param string $uri JSON Schema URI
+     * @return string JSON Schema contents
+     */
+    protected function retrieveUri($uri)
+    {
+        if (null === $this->uriRetriever) {
+            $this->setUriRetriever(new UriRetriever);
+        }
+        $jsonSchema = $this->uriRetriever->retrieve($uri);
+        // TODO validate using schema
+        return $jsonSchema;
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/ConstraintInterface.php

@@ -0,0 +1,60 @@
+<?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;
+
+/**
+ * The Constraints Interface
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ */
+interface ConstraintInterface
+{
+    /**
+     * returns all collected errors
+     *
+     * @return array
+     */
+    public function getErrors();
+
+    /**
+     * adds errors to this validator
+     *
+     * @param array $errors
+     */
+    public function addErrors(array $errors);
+
+    /**
+     * adds an error
+     *
+     * @param string $path
+     * @param string $message
+     * @param string $constraint the constraint/rule that is broken, e.g.: 'minLength'
+     * @param array $more more array elements to add to the error
+     */
+    public function addError($path, $message, $constraint='', array $more=null);
+
+    /**
+     * checks if the validator has not raised errors
+     *
+     * @return boolean
+     */
+    public function isValid();
+
+    /**
+     * invokes the validation of an element
+     *
+     * @abstract
+     * @param mixed $value
+     * @param mixed $schema
+     * @param mixed $path
+     * @param mixed $i
+     */
+    public function check($value, $schema = null, $path = null, $i = null);
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/EnumConstraint.php

@@ -0,0 +1,46 @@
+<?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;
+
+/**
+ * The EnumConstraint Constraints, validates an element against a given set of possibilities
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class EnumConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($element, $schema = null, $path = null, $i = null)
+    {
+        // Only validate enum if the attribute exists
+        if ($element instanceof UndefinedConstraint && (!isset($schema->required) || !$schema->required)) {
+            return;
+        }
+
+        foreach ($schema->enum as $enum) {
+            $type = gettype($element);
+            if ($type === gettype($enum)) {
+                if ($type == "object") {
+                    if ($element == $enum)
+                        return;
+                } else {
+                    if ($element === $enum)
+                        return;
+
+                }
+            }
+        }
+
+        $this->addError($path, "Does not have a value in the enumeration " . print_r($schema->enum, true), 'enum', array('enum' => $schema->enum,));
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Factory.php

@@ -0,0 +1,81 @@
+<?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\Exception\InvalidArgumentException;
+use JsonSchema\Uri\UriRetriever;
+use JsonSchema\Validator;
+
+/**
+ * Factory for centralize constraint initialization.
+ */
+class Factory
+{
+    /**
+     * @var UriRetriever
+     */
+    protected $uriRetriever;
+
+    /**
+     * @param UriRetriever $uriRetriever
+     */
+    public function __construct(UriRetriever $uriRetriever = null)
+    {
+        if (!$uriRetriever) {
+            $uriRetriever = new UriRetriever();
+        }
+
+        $this->uriRetriever = $uriRetriever;
+    }
+
+    /**
+     * @return UriRetriever
+     */
+    public function getUriRetriever()
+    {
+        return $this->uriRetriever;
+    }
+
+    /**
+     * Create a constraint instance for the given constraint name.
+     *
+     * @param string $constraintName
+     * @return ConstraintInterface|ObjectConstraint
+     * @throws InvalidArgumentException if is not possible create the constraint instance.
+     */
+    public function createInstanceFor($constraintName)
+    {
+        switch ($constraintName) {
+            case 'array':
+            case 'collection':
+                return new CollectionConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'object':
+                return new ObjectConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'type':
+                return new TypeConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'undefined':
+                return new UndefinedConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'string':
+                return new StringConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'number':
+                return new NumberConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'enum':
+                return new EnumConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'format':
+                return new FormatConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'schema':
+                return new SchemaConstraint(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+            case 'validator':
+                return new Validator(Constraint::CHECK_MODE_NORMAL, $this->uriRetriever, $this);
+        }
+
+        throw new InvalidArgumentException('Unknown constraint ' . $constraintName);
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/FormatConstraint.php

@@ -0,0 +1,181 @@
+<?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;
+
+/**
+ * Validates against the "format" property
+ *
+ * @author Justin Rainbow <justin.rainbow@gmail.com>
+ * @link   http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5.23
+ */
+class FormatConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($element, $schema = null, $path = null, $i = null)
+    {
+        if (!isset($schema->format)) {
+            return;
+        }
+
+        switch ($schema->format) {
+            case 'date':
+                if (!$date = $this->validateDateTime($element, 'Y-m-d')) {
+                    $this->addError($path, sprintf('Invalid date %s, expected format YYYY-MM-DD', json_encode($element)), 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'time':
+                if (!$this->validateDateTime($element, 'H:i:s')) {
+                    $this->addError($path, sprintf('Invalid time %s, expected format hh:mm:ss', json_encode($element)), 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'date-time':
+                if (!$this->validateDateTime($element, 'Y-m-d\TH:i:s\Z') &&
+                    !$this->validateDateTime($element, 'Y-m-d\TH:i:s.u\Z') &&
+                    !$this->validateDateTime($element, 'Y-m-d\TH:i:sP') &&
+                    !$this->validateDateTime($element, 'Y-m-d\TH:i:sO')
+                ) {
+                    $this->addError($path, sprintf('Invalid date-time %s, expected format YYYY-MM-DDThh:mm:ssZ or YYYY-MM-DDThh:mm:ss+hh:mm', json_encode($element)), 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'utc-millisec':
+                if (!$this->validateDateTime($element, 'U')) {
+                    $this->addError($path, sprintf('Invalid time %s, expected integer of milliseconds since Epoch', json_encode($element)), 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'regex':
+                if (!$this->validateRegex($element)) {
+                    $this->addError($path, 'Invalid regex format ' . $element, 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'color':
+                if (!$this->validateColor($element)) {
+                    $this->addError($path, "Invalid color", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'style':
+                if (!$this->validateStyle($element)) {
+                    $this->addError($path, "Invalid style", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'phone':
+                if (!$this->validatePhone($element)) {
+                    $this->addError($path, "Invalid phone number", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'uri':
+                if (null === filter_var($element, FILTER_VALIDATE_URL, FILTER_NULL_ON_FAILURE)) {
+                    $this->addError($path, "Invalid URL format", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'email':
+                if (null === filter_var($element, FILTER_VALIDATE_EMAIL, FILTER_NULL_ON_FAILURE)) {
+                    $this->addError($path, "Invalid email", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'ip-address':
+            case 'ipv4':
+                if (null === filter_var($element, FILTER_VALIDATE_IP, FILTER_NULL_ON_FAILURE | FILTER_FLAG_IPV4)) {
+                    $this->addError($path, "Invalid IP address", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'ipv6':
+                if (null === filter_var($element, FILTER_VALIDATE_IP, FILTER_NULL_ON_FAILURE | FILTER_FLAG_IPV6)) {
+                    $this->addError($path, "Invalid IP address", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            case 'host-name':
+            case 'hostname':
+                if (!$this->validateHostname($element)) {
+                    $this->addError($path, "Invalid hostname", 'format', array('format' => $schema->format,));
+                }
+                break;
+
+            default:
+                // Empty as it should be:
+                // The value of this keyword is called a format attribute. It MUST be a string.
+                // A format attribute can generally only validate a given set of instance types.
+                // If the type of the instance to validate is not in this set, validation for
+                // this format attribute and instance SHOULD succeed.
+                // http://json-schema.org/latest/json-schema-validation.html#anchor105
+                break;
+        }
+    }
+
+    protected function validateDateTime($datetime, $format)
+    {
+        $dt = \DateTime::createFromFormat($format, $datetime);
+
+        if (!$dt) {
+            return false;
+        }
+
+        if ($datetime === $dt->format($format)) {
+            return true;
+        }
+
+        // handles the case where a non-6 digit microsecond datetime is passed
+        // which will fail the above string comparison because the passed
+        // $datetime may be '2000-05-01T12:12:12.123Z' but format() will return
+        // '2000-05-01T12:12:12.123000Z'
+        if ((strpos('u', $format) !== -1) && (intval($dt->format('u')) > 0)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    protected function validateRegex($regex)
+    {
+        return false !== @preg_match('/' . $regex . '/', '');
+    }
+
+    protected function validateColor($color)
+    {
+        if (in_array(strtolower($color), array('aqua', 'black', 'blue', 'fuchsia',
+            'gray', 'green', 'lime', 'maroon', 'navy', 'olive', 'orange', 'purple',
+            'red', 'silver', 'teal', 'white', 'yellow'))) {
+            return true;
+        }
+
+        return preg_match('/^#([a-f0-9]{3}|[a-f0-9]{6})$/i', $color);
+    }
+
+    protected function validateStyle($style)
+    {
+        $properties     = explode(';', rtrim($style, ';'));
+        $invalidEntries = preg_grep('/^\s*[-a-z]+\s*:\s*.+$/i', $properties, PREG_GREP_INVERT);
+
+        return empty($invalidEntries);
+    }
+
+    protected function validatePhone($phone)
+    {
+        return preg_match('/^\+?(\(\d{3}\)|\d{3}) \d{3} \d{4}$/', $phone);
+    }
+
+    protected function validateHostname($host)
+    {
+        return preg_match('/^[_a-z]+\.([_a-z]+\.?)+$/i', $host);
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/NumberConstraint.php

@@ -0,0 +1,83 @@
+<?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;
+
+/**
+ * The NumberConstraint Constraints, validates an number against a given schema
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class NumberConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($element, $schema = null, $path = null, $i = null)
+    {
+        // Verify minimum
+        if (isset($schema->exclusiveMinimum)) {
+            if (isset($schema->minimum)) {
+                if ($schema->exclusiveMinimum && $element === $schema->minimum) {
+                    $this->addError($path, "Must have a minimum value greater than boundary value of " . $schema->minimum, 'exclusiveMinimum', array('minimum' => $schema->minimum,));
+                } else if ($element < $schema->minimum) {
+                    $this->addError($path, "Must have a minimum value of " . $schema->minimum, 'minimum', array('minimum' => $schema->minimum,));
+                }
+            } else {
+                $this->addError($path, "Use of exclusiveMinimum requires presence of minimum", 'missingMinimum');
+            }
+        } else if (isset($schema->minimum) && $element < $schema->minimum) {
+            $this->addError($path, "Must have a minimum value of " . $schema->minimum, 'minimum', array('minimum' => $schema->minimum,));
+        }
+
+        // Verify maximum
+        if (isset($schema->exclusiveMaximum)) {
+            if (isset($schema->maximum)) {
+                if ($schema->exclusiveMaximum && $element === $schema->maximum) {
+                    $this->addError($path, "Must have a maximum value less than boundary value of " . $schema->maximum, 'exclusiveMaximum', array('maximum' => $schema->maximum,));
+                } else if ($element > $schema->maximum) {
+                    $this->addError($path, "Must have a maximum value of " . $schema->maximum, 'maximum', array('maximum' => $schema->maximum,));
+                }
+            } else {
+                $this->addError($path, "Use of exclusiveMaximum requires presence of maximum", 'missingMinimum');
+            }
+        } else if (isset($schema->maximum) && $element > $schema->maximum) {
+            $this->addError($path, "Must have a maximum value of " . $schema->maximum, 'maximum', array('maximum' => $schema->maximum,));
+        }
+
+        // Verify divisibleBy - Draft v3
+        if (isset($schema->divisibleBy) && $this->fmod($element, $schema->divisibleBy) != 0) {
+            $this->addError($path, "Is not divisible by " . $schema->divisibleBy, 'divisibleBy', array('divisibleBy' => $schema->divisibleBy,));
+        }
+
+        // Verify multipleOf - Draft v4
+        if (isset($schema->multipleOf) && $this->fmod($element, $schema->multipleOf) != 0) {
+            $this->addError($path, "Must be a multiple of " . $schema->multipleOf, 'multipleOf', array('multipleOf' => $schema->multipleOf,));
+        }
+
+        $this->checkFormat($element, $schema, $path, $i);
+    }
+
+    private function fmod($number1, $number2)
+    {
+        $modulus = fmod($number1, $number2);
+        $precision = abs(0.0000000001);
+        $diff = (float)($modulus - $number2);
+
+        if (-$precision < $diff && $diff < $precision) {
+            return 0.0;
+        }
+
+        $decimals1 = mb_strpos($number1, ".") ? mb_strlen($number1) - mb_strpos($number1, ".") - 1 : 0;
+        $decimals2 = mb_strpos($number2, ".") ? mb_strlen($number2) - mb_strpos($number2, ".") - 1 : 0;
+
+        return (float)round($modulus, max($decimals1, $decimals2));
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/ObjectConstraint.php

@@ -0,0 +1,149 @@
+<?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;
+
+/**
+ * The ObjectConstraint Constraints, validates an object against a given schema
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class ObjectConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    function check($element, $definition = null, $path = null, $additionalProp = null, $patternProperties = null)
+    {
+        if ($element instanceof UndefinedConstraint) {
+            return;
+        }
+
+        $matches = array();
+        if ($patternProperties) {
+            $matches = $this->validatePatternProperties($element, $path, $patternProperties);
+        }
+
+        if ($definition) {
+            // validate the definition properties
+            $this->validateDefinition($element, $definition, $path);
+        }
+
+        // additional the element properties
+        $this->validateElement($element, $matches, $definition, $path, $additionalProp);
+    }
+
+    public function validatePatternProperties($element, $path, $patternProperties)
+    {
+        $try = array('/','#','+','~','%');
+        $matches = array();
+        foreach ($patternProperties as $pregex => $schema) {
+            $delimiter = '/';
+            // Choose delimiter. Necessary for patterns like ^/ , otherwise you get error
+            foreach ($try as $delimiter) {
+                if (strpos($pregex, $delimiter) === false) { // safe to use
+                    break;
+                }
+            }
+
+            // Validate the pattern before using it to test for matches
+            if (@preg_match($delimiter. $pregex . $delimiter, '') === false) {
+                $this->addError($path, 'The pattern "' . $pregex . '" is invalid', 'pregex', array('pregex' => $pregex,));
+                continue;
+            }
+            foreach ($element as $i => $value) {
+                if (preg_match($delimiter . $pregex . $delimiter, $i)) {
+                    $matches[] = $i;
+                    $this->checkUndefined($value, $schema ? : new \stdClass(), $path, $i);
+                }
+            }
+        }
+        return $matches;
+    }
+
+    /**
+     * Validates the element properties
+     *
+     * @param \stdClass $element          Element to validate
+     * @param array     $matches          Matches from patternProperties (if any)
+     * @param \stdClass $objectDefinition ObjectConstraint definition
+     * @param string    $path             Path to test?
+     * @param mixed     $additionalProp   Additional properties
+     */
+    public function validateElement($element, $matches, $objectDefinition = null, $path = null, $additionalProp = null)
+    {
+        foreach ($element as $i => $value) {
+
+            $property = $this->getProperty($element, $i, new UndefinedConstraint());
+            $definition = $this->getProperty($objectDefinition, $i);
+
+            // no additional properties allowed
+            if (!in_array($i, $matches) && $additionalProp === false && $this->inlineSchemaProperty !== $i && !$definition) {
+                $this->addError($path, "The property " . $i . " is not defined and the definition does not allow additional properties", 'additionalProp');
+            }
+
+            // additional properties defined
+            if (!in_array($i, $matches) && $additionalProp && !$definition) {
+                if ($additionalProp === true) {
+                    $this->checkUndefined($value, null, $path, $i);
+                } else {
+                    $this->checkUndefined($value, $additionalProp, $path, $i);
+                }
+            }
+
+            // property requires presence of another
+            $require = $this->getProperty($definition, 'requires');
+            if ($require && !$this->getProperty($element, $require)) {
+                $this->addError($path, "The presence of the property " . $i . " requires that " . $require . " also be present", 'requires');
+            }
+
+            if (!$definition) {
+                // normal property verification
+                $this->checkUndefined($value, new \stdClass(), $path, $i);
+            }
+        }
+    }
+
+    /**
+     * Validates the definition properties
+     *
+     * @param \stdClass $element          Element to validate
+     * @param \stdClass $objectDefinition ObjectConstraint definition
+     * @param string    $path             Path?
+     */
+    public function validateDefinition($element, $objectDefinition = null, $path = null)
+    {
+        foreach ($objectDefinition as $i => $value) {
+            $property = $this->getProperty($element, $i, new UndefinedConstraint());
+            $definition = $this->getProperty($objectDefinition, $i);
+            $this->checkUndefined($property, $definition, $path, $i);
+        }
+    }
+
+    /**
+     * retrieves a property from an object or array
+     *
+     * @param mixed  $element  Element to validate
+     * @param string $property Property to retrieve
+     * @param mixed  $fallback Default value if property is not found
+     *
+     * @return mixed
+     */
+    protected function getProperty($element, $property, $fallback = null)
+    {
+        if (is_array($element) /*$this->checkMode == self::CHECK_MODE_TYPE_CAST*/) {
+            return array_key_exists($property, $element) ? $element[$property] : $fallback;
+        } elseif (is_object($element)) {
+            return property_exists($element, $property) ? $element->$property : $fallback;
+        }
+
+        return $fallback;
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/SchemaConstraint.php

@@ -0,0 +1,37 @@
+<?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\Exception\InvalidArgumentException;
+
+/**
+ * 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
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($element, $schema = null, $path = null, $i = null)
+    {
+        if ($schema !== null) {
+            // passed schema
+            $this->checkUndefined($element, $schema, '', '');
+        } elseif (property_exists($element, $this->inlineSchemaProperty)) {
+            // inline schema
+            $this->checkUndefined($element, $element->{$this->inlineSchemaProperty}, '', '');
+        } else {
+            throw new InvalidArgumentException('no schema found to verify against');
+        }
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/StringConstraint.php

@@ -0,0 +1,57 @@
+<?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;
+
+/**
+ * The StringConstraint Constraints, validates an string against a given schema
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class StringConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($element, $schema = null, $path = null, $i = null)
+    {
+        // Verify maxLength
+        if (isset($schema->maxLength) && $this->strlen($element) > $schema->maxLength) {
+            $this->addError($path, "Must be at most " . $schema->maxLength . " characters long", 'maxLength', array(
+                'maxLength' => $schema->maxLength,
+            ));
+        }
+
+        //verify minLength
+        if (isset($schema->minLength) && $this->strlen($element) < $schema->minLength) {
+            $this->addError($path, "Must be at least " . $schema->minLength . " characters long", 'minLength', array(
+                'minLength' => $schema->minLength,
+            ));
+        }
+
+        // Verify a regex pattern
+        if (isset($schema->pattern) && !preg_match('#' . str_replace('#', '\\#', $schema->pattern) . '#', $element)) {
+            $this->addError($path, "Does not match the regex pattern " . $schema->pattern, 'pattern', array(
+                'pattern' => $schema->pattern,
+            ));
+        }
+
+        $this->checkFormat($element, $schema, $path, $i);
+    }
+
+    private function strlen($string)
+    {
+        if (extension_loaded('mbstring')) {
+            return mb_strlen($string, mb_detect_encoding($string));
+        } else {
+            return strlen($string);
+        }
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/TypeConstraint.php

@@ -0,0 +1,145 @@
+<?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\Exception\InvalidArgumentException;
+use UnexpectedValueException as StandardUnexpectedValueException;
+
+/**
+ * The TypeConstraint Constraints, validates an element against a given type
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class TypeConstraint extends Constraint
+{
+    /**
+     * @var array|string[] type wordings for validation error messages
+     */
+    static $wording = array(
+        'integer' => 'an integer',
+        'number'  => 'a number',
+        'boolean' => 'a boolean',
+        'object'  => 'an object',
+        'array'   => 'an array',
+        'string'  => 'a string',
+        'null'    => 'a null',
+        'any'     => NULL, // validation of 'any' is always true so is not needed in message wording
+        0         => NULL, // validation of a false-y value is always true, so not needed as well
+    );
+
+    /**
+     * {@inheritDoc}
+     */
+    public function check($value = null, $schema = null, $path = null, $i = null)
+    {
+        $type = isset($schema->type) ? $schema->type : null;
+        $isValid = true;
+
+        if (is_array($type)) {
+            // @TODO refactor
+            $validatedOneType = false;
+            $errors = array();
+            foreach ($type as $tp) {
+                $validator = new TypeConstraint($this->checkMode);
+                $subSchema = new \stdClass();
+                $subSchema->type = $tp;
+                $validator->check($value, $subSchema, $path, null);
+                $error = $validator->getErrors();
+
+                if (!count($error)) {
+                    $validatedOneType = true;
+                    break;
+                }
+
+                $errors = $error;
+            }
+
+            if (!$validatedOneType) {
+                $this->addErrors($errors);
+
+                return;
+            }
+        } elseif (is_object($type)) {
+            $this->checkUndefined($value, $type, $path);
+        } else {
+            $isValid = $this->validateType($value, $type);
+        }
+
+        if ($isValid === false) {
+            if (!isset(self::$wording[$type])) {
+                throw new StandardUnexpectedValueException(
+                    sprintf(
+                        "No wording for %s available, expected wordings are: [%s]",
+                        var_export($type, true),
+                        implode(', ', array_filter(self::$wording)))
+                );
+            }
+            $this->addError($path, ucwords(gettype($value)) . " value found, but " . self::$wording[$type] . " is required", 'type');
+        }
+    }
+
+    /**
+     * Verifies that a given value is of a certain type
+     *
+     * @param mixed  $value Value to validate
+     * @param string $type  TypeConstraint to check against
+     *
+     * @return boolean
+     *
+     * @throws InvalidArgumentException
+     */
+    protected function validateType($value, $type)
+    {
+        //mostly the case for inline schema
+        if (!$type) {
+            return true;
+        }
+
+        if ('integer' === $type) {
+            return is_int($value);
+        }
+
+        if ('number' === $type) {
+            return is_numeric($value) && !is_string($value);
+        }
+
+        if ('boolean' === $type) {
+            return is_bool($value);
+        }
+
+        if ('object' === $type) {
+            return is_object($value);
+            //return ($this::CHECK_MODE_TYPE_CAST == $this->checkMode) ? is_array($value) : is_object($value);
+        }
+
+        if ('array' === $type) {
+            return is_array($value);
+        }
+
+        if ('string' === $type) {
+            return is_string($value);
+        }
+        
+        if ('email' === $type) {
+            return is_string($value);
+        }
+
+        if ('null' === $type) {
+            return is_null($value);
+        }
+
+        if ('any' === $type) {
+            return true;
+        }
+
+        throw new InvalidArgumentException((is_object($value) ? 'object' : $value) . ' is an invalid type for ' . $type);
+    }
+}

server/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/UndefinedConstraint.php

@@ -0,0 +1,307 @@
+<?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\Exception\InvalidArgumentException;
+use JsonSchema\Uri\UriResolver;
+
+/**
+ * The UndefinedConstraint Constraints
+ *
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ * @author Bruno Prieto Reis <bruno.p.reis@gmail.com>
+ */
+class UndefinedConstraint extends Constraint
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function check($value, $schema = null, $path = null, $i = null)
+    {
+        if (is_null($schema)) {
+            return;
+        }
+
+        if (!is_object($schema)) {
+            throw new InvalidArgumentException(
+                'Given schema must be an object in ' . $path
+                . ' but is a ' . gettype($schema)
+            );
+        }
+
+        $i = is_null($i) ? "" : $i;
+        $path = $this->incrementPath($path, $i);
+
+        // check special properties
+        $this->validateCommonProperties($value, $schema, $path);
+
+        // check allOf, anyOf, and oneOf properties
+        $this->validateOfProperties($value, $schema, $path);
+
+        // check known types
+        $this->validateTypes($value, $schema, $path, $i);
+    }
+
+    /**
+     * Validates the value against the types
+     *
+     * @param mixed  $value
+     * @param mixed  $schema
+     * @param string $path
+     * @param string $i
+     */
+    public function validateTypes($value, $schema = null, $path = null, $i = null)
+    {
+        // check array
+        if (is_array($value)) {
+            $this->checkArray($value, $schema, $path, $i);
+        }
+
+        // check object
+        if (is_object($value) && (isset($schema->properties) || isset($schema->patternProperties) || isset($schema->additionalProperties))) {
+            $this->checkObject(
+                $value,
+                isset($schema->properties) ? $schema->properties : null,
+                $path,
+                isset($schema->additionalProperties) ? $schema->additionalProperties : null,
+                isset($schema->patternProperties) ? $schema->patternProperties : null
+            );
+        }
+
+        // check string
+        if (is_string($value)) {
+            $this->checkString($value, $schema, $path, $i);
+        }
+
+        // check numeric
+        if (is_numeric($value)) {
+            $this->checkNumber($value, $schema, $path, $i);
+        }
+
+        // check enum
+        if (isset($schema->enum)) {
+            $this->checkEnum($value, $schema, $path, $i);
+        }
+    }
+
+    /**
+     * Validates common properties
+     *
+     * @param mixed  $value
+     * @param mixed  $schema
+     * @param string $path
+     * @param string $i
+     */
+    protected function validateCommonProperties($value, $schema = null, $path = null, $i = "")
+    {
+        // if it extends another schema, it must pass that schema as well
+        if (isset($schema->extends)) {
+            if (is_string($schema->extends)) {
+                $schema->extends = $this->validateUri($schema, $schema->extends);
+            }
+            if (is_array($schema->extends)) {
+                foreach ($schema->extends as $extends) {
+                    $this->checkUndefined($value, $extends, $path, $i);
+                }
+            } else {
+                $this->checkUndefined($value, $schema->extends, $path, $i);
+            }
+        }
+
+        // Verify required values
+        if (is_object($value)) {
+            if (!($value instanceof UndefinedConstraint) && isset($schema->required) && is_array($schema->required) ) {
+                // Draft 4 - Required is an array of strings - e.g. "required": ["foo", ...]
+                foreach ($schema->required as $required) {
+                    if (!property_exists($value, $required)) {
+                        $this->addError((!$path) ? $required : "$path.$required", "The property " . $required . " is required", 'required');
+                    }
+                }
+            } else if (isset($schema->required) && !is_array($schema->required)) {
+                // Draft 3 - Required attribute - e.g. "foo": {"type": "string", "required": true}
+                if ( $schema->required && $value instanceof UndefinedConstraint) {
+                    $this->addError($path, "Is missing and it is required", 'required');
+                }
+            }
+        }
+
+        // Verify type
+        if (!($value instanceof UndefinedConstraint)) {
+            $this->checkType($value, $schema, $path);
+        }
+
+        // Verify disallowed items
+        if (isset($schema->disallow)) {
+            $initErrors = $this->getErrors();
+
+            $typeSchema = new \stdClass();
+            $typeSchema->type = $schema->disallow;
+            $this->checkType($value, $typeSchema, $path);
+
+            // if no new errors were raised it must be a disallowed value
+            if (count($this->getErrors()) == count($initErrors)) {
+                $this->addError($path, "Disallowed value was matched", 'disallow');
+            } else {
+                $this->errors = $initErrors;
+            }
+        }
+
+        if (isset($schema->not)) {
+            $initErrors = $this->getErrors();
+            $this->checkUndefined($value, $schema->not, $path, $i);
+
+            // if no new errors were raised then the instance validated against the "not" schema
+            if (count($this->getErrors()) == count($initErrors)) {
+                $this->addError($path, "Matched a schema which it should not", 'not');
+            } else {
+                $this->errors = $initErrors;
+            }
+        }
+
+        // Verify minimum and maximum number of properties
+        if (is_object($value)) {
+            if (isset($schema->minProperties)) {
+                if (count(get_object_vars($value)) < $schema->minProperties) {
+                    $this->addError($path, "Must contain a minimum of " . $schema->minProperties . " properties", 'minProperties', array('minProperties' => $schema->minProperties,));
+                }
+            }
+            if (isset($schema->maxProperties)) {
+                if (count(get_object_vars($value)) > $schema->maxProperties) {
+                    $this->addError($path, "Must contain no more than " . $schema->maxProperties . " properties", 'maxProperties', array('maxProperties' => $schema->maxProperties,));
+                }
+            }
+        }
+
+        // Verify that dependencies are met
+        if (is_object($value) && isset($schema->dependencies)) {
+            $this->validateDependencies($value, $schema->dependencies, $path);
+        }
+    }
+
+    /**
+     * Validate allOf, anyOf, and oneOf properties
+     *
+     * @param mixed  $value
+     * @param mixed  $schema
+     * @param string $path
+     * @param string $i
+     */
+    protected function validateOfProperties($value, $schema, $path, $i = "")
+    {
+        // Verify type
+        if ($value instanceof UndefinedConstraint) {
+            return;
+        }
+
+        if (isset($schema->allOf)) {
+            $isValid = true;
+            foreach ($schema->allOf as $allOf) {
+                $initErrors = $this->getErrors();
+                $this->checkUndefined($value, $allOf, $path, $i);
+                $isValid = $isValid && (count($this->getErrors()) == count($initErrors));
+            }
+            if (!$isValid) {
+                $this->addError($path, "Failed to match all schemas", 'allOf');
+            }
+        }
+
+        if (isset($schema->anyOf)) {
+            $isValid = false;
+            $startErrors = $this->getErrors();
+            foreach ($schema->anyOf as $anyOf) {
+                $initErrors = $this->getErrors();
+                $this->checkUndefined($value, $anyOf, $path, $i);
+                if ($isValid = (count($this->getErrors()) == count($initErrors))) {
+                    break;
+                }
+            }
+            if (!$isValid) {
+                $this->addError($path, "Failed to match at least one schema", 'anyOf');
+            } else {
+                $this->errors = $startErrors;
+            }
+        }
+
+        if (isset($schema->oneOf)) {
+            $allErrors = array();
+            $matchedSchemas = 0;
+            $startErrors = $this->getErrors();
+            foreach ($schema->oneOf as $oneOf) {
+                $this->errors = array();
+                $this->checkUndefined($value, $oneOf, $path, $i);
+                if (count($this->getErrors()) == 0) {
+                    $matchedSchemas++;
+                }
+                $allErrors = array_merge($allErrors, array_values($this->getErrors()));
+            }
+            if ($matchedSchemas !== 1) {
+                $this->addErrors(
+                    array_merge(
+                        $allErrors,
+                        array(array(
+                            'property' => $path,
+                            'message' => "Failed to match exactly one schema",
+                            'constraint' => 'oneOf',
+                        ),),
+                        $startErrors
+                    )
+                );
+            } else {
+                $this->errors = $startErrors;
+            }
+        }
+    }
+
+    /**
+     * Validate dependencies
+     *
+     * @param mixed  $value
+     * @param mixed  $dependencies
+     * @param string $path
+     * @param string $i
+     */
+    protected function validateDependencies($value, $dependencies, $path, $i = "")
+    {
+        foreach ($dependencies as $key => $dependency) {
+            if (property_exists($value, $key)) {
+                if (is_string($dependency)) {
+                    // Draft 3 string is allowed - e.g. "dependencies": {"bar": "foo"}
+                    if (!property_exists($value, $dependency)) {
+                        $this->addError($path, "$key depends on $dependency and $dependency is missing", 'dependencies');
+                    }
+                } else if (is_array($dependency)) {
+                    // Draft 4 must be an array - e.g. "dependencies": {"bar": ["foo"]}
+                    foreach ($dependency as $d) {
+                        if (!property_exists($value, $d)) {
+                            $this->addError($path, "$key depends on $d and $d is missing", 'dependencies');
+                        }
+                    }
+                } else if (is_object($dependency)) {
+                    // Schema - e.g. "dependencies": {"bar": {"properties": {"foo": {...}}}}
+                    $this->checkUndefined($value, $dependency, $path, $i);
+                }
+            }
+        }
+    }
+
+    protected function validateUri($schema, $schemaUri = null)
+    {
+        $resolver = new UriResolver();
+        $retriever = $this->getUriRetriever();
+
+        $jsonSchema = null;
+        if ($resolver->isValid($schemaUri)) {
+            $schemaId = property_exists($schema, 'id') ? $schema->id : null;
+            $jsonSchema = $retriever->retrieve($schemaId, $schemaUri);
+        }
+
+        return $jsonSchema;
+    }
+}