rollback support for v3 and v4 serializer

Author: saimaz

.travis.yml

@@ -8,7 +8,7 @@ php:
   - 7.4
 env:
   global:
-    - ES_VERSION=6.7.1 ES_DOWNLOAD_URL=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ES_VERSION}.tar.gz
+    - ES_VERSION=6.8.2 ES_DOWNLOAD_URL=https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ES_VERSION}.tar.gz
 install:
   - wget ${ES_DOWNLOAD_URL}
   - tar -xzf elasticsearch-${ES_VERSION}.tar.gz

composer.json

@@ -12,11 +12,11 @@
     ],
     "require": {
         "php": "^7.0",
-        "symfony/serializer": "^3.0|^4.0|^5.0",
-        "paragonie/random_compat": "*"
+        "symfony/serializer": "^3.0|^4.0",
+        "paragonie/random_compat": "*",
+        "elasticsearch/elasticsearch": "^6.0"
     },
     "require-dev": {
-        "elasticsearch/elasticsearch": "^6.0",
         "phpunit/phpunit": "^7.0",
         "squizlabs/php_codesniffer": "^3.0"
     },

src/SearchEndpoint/AggregationsEndpoint.php

@@ -27,7 +27,7 @@ class AggregationsEndpoint extends AbstractSearchEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         $output = [];
         if (count($this->getAll()) > 0) {

src/SearchEndpoint/HighlightEndpoint.php

@@ -37,7 +37,7 @@ class HighlightEndpoint extends AbstractSearchEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         if ($this->highlight) {
             return $this->highlight->toArray();

src/SearchEndpoint/InnerHitsEndpoint.php

@@ -27,7 +27,7 @@ class InnerHitsEndpoint extends AbstractSearchEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         $output = [];
         if (count($this->getAll()) > 0) {

src/SearchEndpoint/PostFilterEndpoint.php

@@ -26,7 +26,7 @@ class PostFilterEndpoint extends QueryEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         if (!$this->getBool()) {
             return null;

src/SearchEndpoint/QueryEndpoint.php

@@ -39,7 +39,7 @@ class QueryEndpoint extends AbstractSearchEndpoint implements OrderedNormalizerI
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         if (!$this->filtersSet && $this->hasReference('filter_query')) {
             /** @var BuilderInterface $filter */

src/SearchEndpoint/SortEndpoint.php

@@ -26,7 +26,7 @@ class SortEndpoint extends AbstractSearchEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         $output = [];
 

src/SearchEndpoint/SuggestEndpoint.php

@@ -27,7 +27,7 @@ class SuggestEndpoint extends AbstractSearchEndpoint
     /**
      * {@inheritdoc}
      */
-    public function normalize(NormalizerInterface $normalizer, string $format = null, array $context = [])
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         $output = [];
         if (count($this->getAll()) > 0) {

src/Serializer/Normalizer/CustomReferencedNormalizer.php

@@ -26,7 +26,7 @@ class CustomReferencedNormalizer extends CustomNormalizer
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, string $format = null, array $context = [])
+    public function normalize($object, $format = null, array $context = [])
     {
         $object->setReferences($this->references);
         $data = parent::normalize($object, $format, $context);
@@ -38,7 +38,7 @@ public function normalize($object, string $format = null, array $context = [])
     /**
      * {@inheritdoc}
      */
-    public function supportsNormalization($data, string $format = null)
+    public function supportsNormalization($data, $format = null)
     {
         return $data instanceof AbstractNormalizable;
     }

src/Serializer/OrderedSerializer.php

@@ -22,7 +22,7 @@ class OrderedSerializer extends Serializer
     /**
      * {@inheritdoc}
      */
-    public function normalize($data, string $format = null, array $context = [])
+    public function normalize($data, $format = null, array $context = [])
     {
         return parent::normalize(
             is_array($data) ? $this->order($data) : $data,